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Eval. board Users Manual ver. 1.1

1. N 2 4 18 RESET Reset the board and 24 9 SEE dee 284520 SHOW Show sede Sede 2 SREP OVER Mek aid os 2 4 22 SYMBOL Symbol Name Management 22023 TRACE Trace INCO Oye da ae ee ah die Mavis 2 4 24 UPDBUG Update the dBUG Image 2 4 25 UPUSER Update User Code In Flash 2 4 26 VERSION Display dBUG Version 2425 TRAP i 5 Bun GE Qe Died OUT ob Sion i Neh Gow be eo oS Ae se 2 9202 IN CHAR 22553 CHAR PRESENT 4262 3 Aue 2 5 4 TO GIB CHAPTER 3 HARDWARE DESCRIPTION AND RECONFIGURATION 3 1 THE PROCESSOR AND SUPPORT LOGIC eee Sided 5 152 The RESELL LOGIC
2. NSTAELATTON 29 1 2942 Preparing the Board Tor USS oases sae ea eke 298 Providing Foer to the Board 9 4 Selecting Terminal Baud Rate The Terminal Character Format 9 6 Connecting the Terminal aot Using Personal Computer as a Terminal SYSTEM POWER UP AND INITIAL OPERATION 58652062 JUMPER SETUP ai evict Sas Pei US ENG THE BDM dh gtd ie eave he CHAPTER 2 USING THE MONITOR DEBUG FIRMWARE 2 1 WHAT be aed oe be Ske 22 OPERATIONAL PROCEDURE 45 294 ae 25221 2 2 2 SYSTEM ieee are 2 2 2 1 SOFT RESET BUtCCON ores era tet eels ABORT BUttOM senese weese Software Reset Command nd dia cent 2 2 2 4 User ek 2 29 Syst m Operatio
3. 3123 Se ald S 3 1 4 tee ied Watchdog Timer BUS MONITOR 8 416 Soon Oe eee sa Sed sd rn all SRAM eae ed hid pete a le 3 1 8 5206 Registers and Memory 32129 Vector Mapping seer ee EEE REES 3 1 10 STA Generation wes Wi bs ee Sella Walt State Cenerator en 2 72 THE DRAM SIMM 552 oS eS THE EPROM FLASH ROM ated aa 3 4 THE SERIAL COMMUNICATION 5 3 4 1 THE MCE S20 6 test 3 4 2 MEOSHCO0N Sige yh ee ls 3 4 3 Motorola Bus M Bus Module 229 PORT sts da ww dee Sais THE BUS LOGIC THE CONNECTORS AND THE EXPANSION BUS 3s The Programming Connector eens Ba 152 The ISA Bus Auxiliary Power Connector J2 Sy The Power Sup
4. Receive Data Output from board receive refers to terminal side Transmit Data Input to board transmit refers to terminal side Data Terminal Ready input not used Signal Ground Data Set Ready Output shorted to pins 1 and 8 Request to Send input Clear to send output shorted to pins 1 and 6 Not connected Figure 1 4 Pin assignment for the J5 Terminal connector 1 7 Figure 1 3 Jumper and connector placement 1 10 SYSTEM POWER UP AND INITIAL OPERATION Now that you have connected all the cables you may apply power to the board After power is applied the dBUG initializes the board then displays the power up message on the terminal which includes the amount of the memory present Hard Reset DRAM Size IM Copyright 1995 1996 Motorola Inc All Rights Reserved ColdFire MCF5206 EVS Debugger V1 1 xxx 1996 xx xx xx Enter help for help dBUG gt The board is now ready for operation under the control of the debugger as described in Chapters 2 If you do not get the above response perform the following checks 1 Make sure that the power supply is properly set and connected to the board 2 Check that the terminal and board are set for the same character format and baud 3 Press the red RESET red switch button to insure that the board has been initialized properly If you still are not receiving the proper response your board may have been damaged in shipping Contact Arnewsh fo
5. mm 10000 2 22 2 4 17 RM Register Modify RM Usage RM reg data The RM command modifies the contents of the register reg to data The value for reg is the name of the register and the value for data may be a symbol name or it is converted according to the user defined radix normally hexadecimal dBUG preserves the registers by storing a copy of the register set in a buffer The RM command updates the copy of the register in the buffer The actual value will not be written to the register until target code is executed Examples To change register DO to contain the value 0x1234 the command is rm DO 1234 2 23 2 4 18 Reset the board RESET Usage RESET The RESET command attempts to reset the board and dBUG to their initial power on states The RESET command executes the same sequence of code that occurs at power on This code attempts to initialize the devices on the board and dBUG data structures If the RESET command fails to reset the board to your satisfaction cycle power or press the reset button Examples To reset the board and clear the dBUG data structures the command 15 reset 2 24 2 4 19 SET Set Configuration SET Usage SET option lt value gt SET The SET command allows the setting of user configurable options within dBUG The options are listed below If the SET command is issued without option it will show the available options and values The board needs a RESE
6. The SBC5206 needs 5 volts supply less than an Amp The power can be 5 Volts regulated or 7 5 to 12 Volts DC regulated or unregulated which utilizes the on board regulator U14 Jumper JP1 Table 3 6 makes the selection between 5 Volts regulated and the 7 5 12 Volts supply If pins 1 and 2 are 3 8 connected the board needs external 5 Volts regulated supply If pins 2 and 3 connected then supply of 7 5 to 12 volts may be used In either case the power may be connected to the board through J3 2 1mm power jack or the J4 two contact lever actuated terminal block On J3 the center pin pin 1 is the plus supply and the body pin 3 is the ground On J4 the pin 1 is the plus supply and pin 2 is the ground Tables 3 4 and 3 5 show the Pin assignment for J3 and J4 TABLE 3 4 The J3 Connector pin assignment PIN NUMBER SIGNAL NAME 1 center pin Plus Supply 2 body TABLE 3 5 The J4 Connector pin assignment PIN NUMBER SIGNAL NAME Plus Supply TABLE 3 6 The Jumper JP1 regulated 5 Volts 7 5 to 12 DC regulated or unregulated 3 7 4 The Terminal Connector J5 The SBC5206 uses 9 pin D sub female connector J5 for connecting the board to a terminal or a PC with terminal emulation software The available signals are a working subset of the RS 232C standard Table 3 7 shows the pin assignment TABLE 3 7 The J5 TERMINAL Connector pin assignment PIN NO DIRECTION IGNAL NAME Output ata Car
7. 00010000 and ending at 0x0004000 with a byte value of the command is bf b 10000 40000 AB To zero out the BSS section of the target code defined by the symbols bss_start and bss_end the command is bf bss_start bss_end 0 2 7 2 4 2 BM Block Move BM Usage BM begin end dest The BM command moves a contiguous block of memory starting at address begin stopping at address end to the new address dest The BM command copies memory as a series of bytes and does not alter the original block The value for addresses begin end and dest may be an absolute address specified as a hexadecimal value or a symbol name If the destination address overlaps the block defined by begin and end an error message is produced and the command exits Examples To copy a block of memory starting at 0x00040000 and ending at 0x00080000 to the location 0x00200000 the command is bm 40000 80000 200000 To copy the target code s data section defined by the symbols data_start and data_end to 0x00200000 the command is bm data_start data_end 200000 2 8 2 4 3 BR Breakpoint BR Usage BR addr lt r gt lt c count gt lt t trigger gt The BR command inserts or removes breakpoints at address addr The value for addr may be an absolute address specified as a hexadecimal value or a symbol name Count and trigger are numbers converted according to the user defined radix normally hexadecimal If no argument is provided to the BR com
8. 29F040 which are 5 volt only devices If the user wishes to modify the size or the type of the memory chips the jumpers JP2 and JP3 should be modified to accommodate different size and type of memory chips Refer to Figure 3 1 for jumper selection Although the board supports different types of Flash ROM s EPROM s the dBUG Flash driver is setup for 29F010 device only The board is shipped with two 29F010 128K byte FLASH ROM s for a total of 256K bytes The first 128K of the Flash contains dBUG firmware The second half last 128K is available to the user The high byte even address chip is installed in U13 socket and the low byte odd address chip is installed in U10 socket The chip select signal generated by the MCF5206 50 enables both chips The MCF5206 chip select logic can be programmed to generate the TA for CSO signal after a certain number of wait states The dBUG programs this parameter to three wait states 3 5 2 Configuration JP3 Configuration for EPROM MEMORY SIZE JUMPER SETUP 27 512 512 EPROM 27C010 EPROM 3 to 5 and 27 020 2M EPROM 3 to 5 and 27C040 4M EPROM 3 to 5 and 27C080 8M EPROM 1 to 3 and JP3 JP3 Configuration for FLASH ROM MEMORY SIZE JUMPER SETUP 29F010 Flash and 29F040 7 to 9 and 8 to 10 4M Flash Note Only connect the pins specified Leave the rest open Figure 3 1 Jumper setup for the Flash EPROM sockets 3 6 3 4 THE
9. 4 dBUG COMMAND SET Table 2 1 lists the dBUG commands Each of the individual commands is described in the following pages 2 5 TABLE 2 1 dBUG Commands MNEMONIC BLOCK FILL ________ BF lt WIDTH gt BEGINEND DATA 27 ______ BLOCK MOVE BMBEGINENDDEST 28 ______ BREAKPOINT BR ADDR lt gt lt C COUNT gt lt TTRIGGER gt _____ 210 DISPLAY MODIFY REGISTER DISPLAY__ RD lt REG gt 444222 SYMBOL SYMBOL MANAGEMENT SYMBOL lt SYMB gt lt SYMB VALUE gt lt SYMB gt lt C LIS gt 2 6 2 4 1 Block of Memory Fill BF Usage BF lt width gt begin end data The BF command fills a contiguous block of memory starting at address begin stopping at address end with the value data Width modifies the size of the data that is written The value for addresses begin and end may be an absolute address specified as a hexadecimal value or a symbol name The value for data may be a symbol name or a number converted according to the user defined radix normally hexadecimal This command first aligns the starting address for the data access size and then increments the address accordingly during the operation Thus for the duration of the operation this command performs properly aligned memory accesses Examples To fill a memory block starting at 0x00010000 and ending at 0x00040000 with the value 0x1234 the command is bf 10000 40000 1234 To fill a block of memory starting at 0
10. 400000 To display memory in the data section defined by the symbols data_start and data_end the command is md data_start To display a range of bytes from 0x00040000 to 0x00050000 the command is md b 40000 50000 To display a range of 32 bit values starting at 0 00040000 and ending at 0 00050000 the command is 40000 50000 This command may be repeated by simply pressing the carriage return Enter key It will continue with the address after the last display address 2 20 2 2 15 MM Memory Modify MM Usage MM lt width gt addr lt data gt The MM command modifies memory at the address addr The value for address addr may be an absolute address specified as a hexadecimal value or a symbol name Width modifies the size of the data that is modified The value for data may be a symbol name or a number converted according to the user defined radix normally hexadecimal If a value for data is provided then the MM command immediately sets the contents of addr to data If no value for data is provided then the MM command enters into a loop The loop obtains a value for data sets the contents of the current address to data increments the address according to the data size and repeats The loop terminates when an invalid entry for the data value is entered 1 a period This command first aligns the starting address for the data access size and then increments the address accordingly during the operation Thus for the duratio
11. Baud Rate The serial channel of MC68HC901 which is used for serial communication channel has a built in software programmable baud rate generator timer It can be programmed to a number of baud rates After the power up or a manual RESET the dBUG firmware configures the channel for 19200 baud After the dBUG is running you may issue the SET command to choose baud rate supported by the dBUG Refer to Chapter 2 for the discussion of this command 1 9 5 The Terminal Character Format The character format of the communication channel is fixed at the power up or RESET The character format is 8 bits per character no parity and one stop bit You need to insure that your terminal or PC is set to this format 1 9 6 Connecting the Terminal The board is now ready to be connected to a terminal Use the communication cable provided to connect the terminal to the SBC5206 The cable has a 9 pin female D sub connector at one end and a 9 pin male D sub connector at the other end Attach the 9 pin male connector to J5 connector on the board Attach the 9 pin female connector to a 9 pin to 25 pin adapter if necessary to make it compatible with the connector on the back of the terminal 1 9 7 Using a Personal Computer as a Terminal You may use your personal computer as a terminal provided you also have a terminal emulation software such as PROCOMM KERMIT or similar packages Use the communication cable provided to connect the PC to
12. O cards The slot can be used with 8 or 16 bit ISA cards The ISA space addresses are located starting at 40000000 The main purpose for this setup is to allow the use of Ethernet card NE2000 compatible to facilitate network down load refer to chapter 2 for network download command DN The dBUG driver only accepts 100 NE2000 compatible cards The ISA Bus interrupt request lines IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 9 IRQ10 and IRQ11 are connected to 10 to 17 of the MC68HC901 The requested interrupt is then routed to IRQ4 of the 5206 3 7 THE CONNECTORS AND THE EXPANSION BUS There are eleven connectors on the SBC5206 which are used to connect the board to external I O devices and or expansion boards This section provides a brief discussion and the pin assignments of the connectors 3 7 1 The Programming Connector J1 The J1 connector is used to program the ispLSI2032 This Connector is not a user connector TABLE 3 2 The Connector Pin Assignment PIN NO SIGNAL NAME 5 Volts SDO SDI ISPEN No Connect key MODE 7 GND SCLK 3 7 2 The ISA Bus Auxiliary Power Connector J2 The ISA Bus requires 12 and 5 as well as 5 volts supply Since they are not always needed the connector used for these is a simple burg connector Table 3 3 shows the Pin assignment for J2 TABLE 3 3 The J2 Connector pin assignment PIN NUMBER SIGNAL NAME 12 Volts T2 Volts 3 7 3 The Power Supply Connectors J3 and J4
13. RAM starting at address 00000000 In MCF5206 the CSO responds to any accesses after reset until the CSMRO is written This includes the reset vector range Since CSO is connected to Flash ROM s the Flash ROM s appear to be at address 00000000 which provides the initial stack pointer and program counter the first 8 bytes of the Flash ROM The initialization routine however programs the chip select logic and locates the Flash ROM s to start at FFEO0000 and the DRAM s to start at 00000000 3 1 10 TA Generation The processor starts a bus cycle by providing the necessary information address R W etc and asserting the TS The processor then waits for an acknowledgment TA by the addressed device before it can complete the bus cycle This TA is used not only to indicate the presence of a device it also allows devices with different access time to communicate with the processor properly The MCF5206 as part of the chip select logic has a built in mechanism to generate the TA for all external devices which do not have the capability to generate the TA on their own The Flash ROM s and DRAM s can not generate the TA Their chip select logic s are programmed by dBUG to generate the TA internally after a preprogrammed number of wait states In order to support the future expansion of the board the TA input of the processor is also connected to the Processor Expansion Bus J9 This allows the expansion boards to assert this
14. accomplished via the show command Using IP address already assigned to another machine will cause dBUG network download to fail and probably other severe network problems Make certain the client IP address is unique for the board Check for proper insertion or connection of the network cable Are status LEDs lit indicating that network traffic is present Check for proper configuration and operation of the TFTP server Most Unix workstations can execute a command named tftp which can be used to connect to the TFTP server as well Is the default TFTP root directory present and readable If or similar ICMP message appears then a serious error has occurred Reset the board and wait one minute for the TFTP server to time out and terminate any open connections Verify that the IP addresses for the server and gateway are correct
15. detail information about the SIM The SBC5206 only uses four of the chip selects to access the Flash ROM s MC68HC901 ISA bus interface and the IACK for MC68HC901 The DRAM controller is used to control one SIMM module of up to 32M bytes of DRAM both RAS lines are used All other functions of the SIM are available to the user A hardware watchdog timer Bus Monitor circuit is included in the SIM which monitors the bus activities If a bus cycle is not terminated within a programmable time the watchdog timer will assert an internal transfer error signal to terminate the bus cycle A block diagram of the board is shown in Figure 1 1 1 1 85232 lt i CF5206 X CEIVERS U11 ISA BUS Flash ROM EPROM 010 013 ADDRESS BUS CONTROL BUS DATA BUS Figure 1 1 1 2 1 3 SYSTEM MEMORY There are two 32 pin sockets on the board for EPROM s or Flash ROM s 010 U13 U13 is the most significant byte and the U10 is the least significant byte The EPROM sockets can be set up via jumpers JP2 and to accept 27C512 27 010 27C020 27C040 27 080 EPROM s 29 010 and 29F040 SBC5206 comes with two 29F010 Flash ROM s which are programmed with debugger monitor firmware The dBUG only supports 29F010 flash ROM There is one 72 pin SIMM socket for DRAM which can accept 256Kx32 to 8Mx32 SIMM modules The debugger detects the DRAM size installed 1 4 SERIAL COMMUNICATION CHANNELS The MCF52
16. differs from RESET in that processor register or memory contents are changed the processor and peripherals are not reset and dBUG is not restarted Also in response to depressing the ABORT button the contents of the MCF5206 core internal registers are displayed The abort function is most appropriate when software is being debugged The user can interrupt the processor without destroying the present state of the system 2 2 2 3 Software Reset Command dBUG does have a command that causes dBUG to restart as if hardware reset was invoked The command is RESET 2 2 2 4 USER Program The user can return control of the system to the firmware by recalling dBUG via his her program Instructions can be inserted into the user program to call dBUG via the TRAP 15 handler 2 2 3 System Operation After system initialization the terminal will display Hard Reset DRAM Size IM Copyright 1995 1996 Motorola Inc All Rights Reserved ColdFire MCF5206 EVS Debugger V1 1 xxx 1996 xx xx xx Enter help for help dBUG gt and waits for a command 2 4 The user can call any of the commands supported by the firmware A standard input routine controls the system while the user types a line of input Command processing begins only after the line has been entered and followed by a carriage return NOTES 1 The user memory is located at addresses 00010000 iS the maximum RAM address of the
17. line to indicate their TA to the processor On the expansion boards however this signal should be generated through an open collector buffer with no pull up resistor a pull up resistor is included on the board All the TA s from the expansion boards should be connected to this line 3 1 11 Wait State Generator 3 4 The Flash ROM s and DRAM SIMM on the board may require some adjustments the cycle time of the processor to make them compatible with processor speed To extend the CPU bus cycles for the slower devices the chip select logic of the MCF5206 can be programmed to generate the TA after a given number of wait states Refer to Sections 3 2 and 3 3 information about wait state requirements of 5 and Flash respectively 3 2 THE DRAM SIMM The SBC5206 has one 72 pin SIMM socket U15 for DRAM SIMM This socket supports DRAM SIMM s of 256Kx32 1 32 2Mx32 4Mx32 8Mx32 No special configuration is needed The dBUG will detect the total memory installed on power up The SIMM speed should 70ns The DRAM Access timing is 3 2 2 2 3 3 THE EPROM FLASH ROM There two sockets for EPROM s Flash ROM s the SBC5206 013 high even byte 010 low odd byte These sockets support 64K 128K 256K 512K and 1M byte EPROM s such as 27C256 27 512 27 010 27C020 27C040 and 27C080 chips for a total of up to 2M bytes The sockets also support the Flash ROM s such as 29F010 and
18. of Flash Users access this space starting at address OxFFE20000 2 32 2 4 26 VERSION Display dBUG Version VERSION Usage VERSION The VERSION command display the version information for dBUG The dBUG version number and build date are both given The version number is separated by a decimal for example v1 1 The first number indicates the version of the CPU specific code and the second number indicates the version of the board specific code The version date is the day and time at which the entire monitor was compiled and built Examples To display the version of the dBUG monitor the command is version 2 33 2 5 TRAP 15 Functions An additional utility within the dBUG firmware is a function called the TRAP 15 handler This function can be called by the user program to utilize various routines within the dBUG to perform a special task and to return control to the dBUG This section describes the TRAP 15 handler and how it is used There are four TRAP 15 functions These OUT_CHAR CHAR_PRESENT EXIT_TO_dBUG 2 5 1 This function function code 0x0013 sends character which is in lower 8 bits of D1 to terminal Assembly example assume 41 contains the character 1 0013 d0 Selects the function TRAP 15 The character in 41 is sent to terminal C example void board_out_char int ch If your compiler produces a LINK UNLK pair f
19. prepaid via UPS This warranty does not apply if in the opinion of Arnewsh Inc the product has been damaged by accident misuse neglect misapplication or as a result of service or modification other than specified in the manual by others Please send the board and cables with a complete description of the problem to Arnewsh Inc P O Box 270352 Fort Collins CO 80527 0352 Phone 970 223 1616 Fax 970 223 9573 Motorola is registered trademark of Motorola Inc IBM PC and IBM AT are registered trademark of IBM Corp All other trademark names mentioned in this manual are the registered trade mark of respective owners CHAPTER 1 INTRODUCTION TO THE 5 5206 BOARD TABLE OF CONTENTS DON SS ered wie og ode 15 02 GENERA HARDWARE DESCRIPTION 9 MEMORY 22250 6 ale el 4 SERIAL COMMUNICATION CHANNELS a PARA SOR eaves wise 26 PROGRAMMABLE TIMER COUNTER Soe eo Meet al ESA CONNECTOR ee oe eee Soe ee eterna eee aes 8 SYSTEM
20. processor are 32 bits wide except for the Status Register SR which is 16 bits wide This processor communicates with external devices over a 32 bit wide data bus DO D31 with support for 8 and 16 bit ports This chip can address the entire 4 G Bytes of memory space using internal chip select logic However it provides only 28 address lines 0 27 the processor s signals are available at J7 J9 and J10 for off the board expansion Refer to section 3 7 for pin assignment The MCF5206 has an IEEE JTAG compatible port and BDM port These signals are available at J8 The processor also has the logic to generate up to eight 8 chip selects CSO to CS8 and two banks of DRAM s 3 1 2 The Reset Logic The reset logic provides system initialization under two modes Under system power up and when the RESET switch 52 red switch is activated The power on generates the Master RESET by asserting the RSTI and HIZ which causes total system reset The RESET switch generates Normal Reset which resets the entire processor except the DRAM controller U9 is used to produce active low power on RESET signal which feeds the LSI2032 U4 along with the Push button RESET The U4 device generates the system reset RESET and ISA bus RESET signals dBUG performs the following configurations of internal resources during the initialization The instruction cache is invalidated and disabled The Vector Base Register VBR points to the Flash However a
21. the SBC5206 The cable has a 9 pin female D sub connector at one end and a 9 pin male D sub connector at the other end Connect the 9 pin male connector to J5 connector on SBC5206 Connect the 9 pin female connector to one of the available serial communication channels normally referred to as COM2 etc the IBM PC s or compatible Depending on the kind of serial connector on the back of your PC the connector on your PC may be a male 25 pin or 9 pin You may need to obtain a 9 pin to 25 pin adapter to make the connection If you need to build an adapter refer to Figure 1 4 which shows the pin assignment for the 9 pin connector on the board 1 5 dBUG gt 222277 85232 TERM 5 GND Power Supply BACKGROUND DEBUG MICROPROCESSOR EXPANSION BUS Figure 1 2 Systen Configuration Once the connection to the PC is made you ready to power up the and the terminal emulation software When you are in the terminal mode you need to select the baud rate and the character format for the channel Most terminal emulation software packages provide a command known as Alt p press the p key while pressing the Alt key to choose the baud rate and character format Make sure you select 8 bits no parity one stop bit see Section 1 9 5 Then select the baud rate as 19200 Now you are ready to apply power to the board O O O 0 O O O8 Data Carrier Detect Output shorted to pins 6 and 8
22. 06 has two built in UART s with baud rate generator The signals of channel one are passed through external Driver Receivers to make the channel compatible with RS 232 These channels are not used by the debugger and are available to user In addition the signals of both channels are available at connector 77 The SBC5206 however has MC68HC901 which has four timers and a serial communication port One timer channel is used as baud rate generator for the serial channel The SI and SO lines are passed through external Driver Receiver to make this channel compatible with RS 232C level Note only 2 main signals are available SI and SO signals This channel is the TERMINAL channel used by the debugger for communication with external terminal PC The MCF5206 also incorporate the M Bus which is compatible with Bus standard 1 5 PARALLEL PORTS MCF5206 offers one 8 bit general purpose parallel I O port Each pin can be individually programmed as input or output The parallel port is multiplexed with PST 3 0 and DDATA 3 0 debug signals The default is parallel I O function after reset 1 6 PROGRAMMABLE TIMER COUNTER The MCF5206 has two built in general purpose timer counters These timers are not used by the debugger and are available to the user The signals for the timer are available on the connector J7 There are also three timers in MC68HC901 which are available to user 1 7 ISA BUS CONNECTOR The SBC5206 has one ISA bus connecto
23. Connect N PIN NO Se Ei 2 oB __2 2 5 26 N amp alele lt 5 Nn No Connect 3 12 TABLE 3 11 The J9 Connector pin assignment PIN NO SIGNAL NAME A24 CS4 WE3 TEA A25 CS5 WE2 A26 CS6 WEI RESET A27 CS7 WEO IRQI 5 Volts Ground Ground ei Sal 5 Co o COP NP DY NI BY WO G2 MI ON A NI CPINNO__ e e 207 o 3 13 Table 3 12 The J10 Connector pin assignment PIN NO SIGNAL NAME DSCLK 5 Volts ound PPO DDATAO D PPI DDATAI P2 DDATA2 P3 DDATA3 P4 PSTO OP UO yO 9 qo Ded Sy SPO Oo gt APN Te ES I Ar 3 5 5 P6 PST2 P7 PST3 OO AS z N FINNO O 6 O o rs eles gt gt nin 3 14 5 a Dn a 5 5 Q m 2 lt m gt lt 2 lt 2 2 Z A gt lt 2 lt 2 Z Z A IOCHRDY SMFMW SYSCLK MEMCS16 3 15 3 8 THE SBC5206 JUMPERS There
24. RQ6 IRQ7 IRQ9 IRQ10 and IRQ11 The interrupt from MC68HC901 is reported to MCF5206 on IRQ4 of the MCF5206 The interrupt level for the MC68HC901 is set for Level 4 with priority 2 The vectors used for MC68HC901 are 0 to FF It generates 16 vectors This should not be changed The CS2 is used to access the MC68HC901 internal registers it is mapped to 30000000 The CS1 is programmed to generate an Interrupt Acknowledge signal to drive the ACK of the MC68HC901 Refer to MC68HC901 User s Manual for functional description and the programming model 3 4 3 Motorola Bus M Bus Module The MCF5206 has a built in M Bus module which allows interchip bus interface for a number of I O devices It is compatible with industry standard Bus The SBC5206 does not use this module and it is available to the user The two M Bus signals are SDA and SCL which are available at J7 connector These signals are open collector signals However they have pull up resistors on the SBC5206 The interrupt control register for M Bus is set for Level 3 priority 0 and autovector 3 5 THE PARALLEL I O Port The MCF5206 has 8 bit parallel port the pins have dual functions They can be configured as or their alternate function via the Pin Assignment register All pins are configured as I O pins 3 7 3 6 THE ISA BUS LOGIC The SBC5206 includes the necessary logic drivers and the connector P1 to allow the use of off the shelf ISA Bus I
25. SBC5206 USER S MANUAL REVISION 1 1 Copyright 1996 1997 Arnewsh Inc Arnewsh Inc P O Box 270352 Fort Collins CO 80527 0352 Phone 970 223 1616 Fax 970 223 9573 COPYRIGHT Copyright 1996 1997 by Arnewsh Inc All rights reserved No part of this manual and the dBUG software provided in Flash ROM s EPROM s may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise Use of the program or any part thereof for any purpose other than single end user by the purchaser is prohibited DISCLAIMER The information in this manual has been carefully examined and is believed to be entirely reliable However no responsibility is assumed for inaccuracies Furthermore Arnewsh reserves the right to make changes to any product s herein to improve reliability function or design The SBC5206 board is not intended for use in life and or property critical applications Here such applications are defined to be any situation in which any failure malfunction or unintended operation of the board could directly or indirectly threaten life result in personal injury or cause damage to property Although every effort has been made to make the supplied software and its documentation as accurate and functional as possible Arnewsh Inc will not assume responsibility for any damages incurred or generated by this product Arnewsh does not assume any l
26. SERIAL COMMUNICATION CHANNELS The SBC5206 offers a number of serial communications They are discussed in this section 3 4 1 The MCF5206 DUART The MCF5206 has two built in UART s These serial channels with software programmable baud rate generators are not used by the SBC5206 or dBUG and are available to the user The dBUG however programs the interrupt level for UART1 to Level 3 priority 2 and autovector mode of operation The interrupt level for UART2 to Level 3 priority 1 and autovector mode of operation The signals of these channels are available 77 signals of UART1 are also passed through the RS 232 driver receiver and are available on DB 9 connector J6 Refer to the MCF5206 User s Manual for programming and the register map 3 4 2 MC68HC901 To provide the board with one independent serial communication channel for dBUG communication with terminal PC an MC68HC901 is used This device provides four timer channels and one serial communication channel and 8 input lines Channel D timer is used as the baud rate generator for the serial communication channel The clock source for the timers is the 2 4576MHZ crystal The clock signal to drive the MC68HC901 logic is one fourth of the processor s clock The TXD SO signal and the RXD SI signal are passed through RS 232 driver receiver and are available J5 The eight input lines are used to report the ISA Bus interrupts IRQ3 IRQ4 5 I
27. T after this command in order for the new option s to take effect baud This is the baud rate for the first serial port on the board All communications between dBUG and the user occur using either 9600 or 19200 bps eight data bits no parity and one stop bit 8N1 Do not choose 38400 baud base This is the default radix for use in converting number from their ASCII text representation to the internal quantity used by dBUG The default is hexadecimal base 16 and other choices are binary base 2 octal base 8 and decimal base 10 client This is the network Internet Protocol IP address of the board For network communications the client IP is required to be set to a unique value usually assigned by your local network administrator server This is the network IP address of the machine which contains files accessible via TFTP Your local network administrator will have this information and can assist in properly configuring a TFTP server if one does not exist gateway This is the network IP address of the gateway for your local subnetwork If the client IP address and server IP address are not on the same subnetwork then this option must be properly set Your local network administrator will have this information netmask This is the network address mask to determine if use of a gateway is required This field must be properly set Your local network administrator will have this information filename This is the defaul
28. To execute code at the current program counter and stop at breakpoint address 0x10000 the command is GT 10000 2 16 2 4 11 HELP Help HE Usage HELP lt command gt The HELP command displays a brief syntax of the commands available within dBUG In addition the address of where user code may start is given If command is provided then a brief listing of the syntax of the specified command is displayed Examples To obtain a listing of all the commands available within dBUG the command is help The help list is longer than one page The help command displays one screen full and ask for an input to display the rest of the list To obtain help on the breakpoint command the command is help br 2 17 2 4 12 IRD Internal Registers Display IRD Usage IRD lt module register gt This commands displays the internal registers of different modules inside the MCF5206 In the command line the module refers to the module name where the register is located and the register refers to the specific register needed The registers are organized according to the module to which they belong The available modules on the MCF5206 SIM UART2 TIMER M Bus DRAMC and Chip Select Refer to MCF5206 User s Manual Example ird sim sypcr display the SYPCR register in the SIM module 2 18 2 4 13 IRM Internal Registers MODIFY IRM Usage IRM module register data This commands modifies the contents of the internal regis
29. all breakpoints the command is br r 2 9 2 4 4 BS Block Search BS Usage BS lt width gt begin end data The BS command searches a contiguous block of memory starting at address begin stopping at address end for the value data Width modifies the size of the data that is compared during the search The value for addresses begin and end may be an absolute address specified as a hexadecimal value or a symbol name The value for data may be a symbol name or a number converted according to the user defined radix normally hexadecimal This command first aligns the starting address for the data access size and then increments the address accordingly during the operation Thus for the duration of the operation this command performs properly aligned memory accesses Examples To search for the 16 bit value 0x1234 in the memory block starting at 0x00040000 and ending at 0x00080000 the command is bs 40000 80000 1234 This reads the 16 bit word located at 0 00040000 and compares it against the 16 bit value 0x1234 If no match is found then the address is incremented to 0x00040002 and the next 16 bit value is read and compared To search for the 32 bit value the memory block starting at 0x00040000 and ending at 0x00080000 the command is bs 1 40000 80000 ABCD This reads the 32 bit word located at 0x00040000 and compares it against the 32 bit value 0 0000 If no match is found then the address is i
30. are a total of three jumpers on the SBC5206 board to configure the board for different setup Table 3 14 shows what these jumpers are for and the section where more information can be found TABLE 3 14 The SBC5206 Jumpers unction section ower Supply Selection section 3 7 3 lash EPROM type selection section 3 3 lash EPROM size selection section 3 3 Appendix Configuring for Network Downloads dBUG has the ability to perform downloads over an Ethernet network using the Trivial File Transfer Protocol Prior to using this feature several parameters are required for network downloads to occur The information that is required and the steps for configuring dBUG are described below 1 Required Network Parameters For performing network downloads dBUG needs six parameters four are network related and two are download related The parameters listed below with the dBUG designation following in parenthesis All computers connected to an Ethernet network running the IP protocol need three network specific parameters These parameters are e Internet Protocol IP address for the computer client address of the Gateway for non local traffic gateway and e Network netmask for flagging traffic as local or non local netmask In addition the dBUG network download command requires the following three parameters e IP address of the TFTP server server IP e Name of the file
31. autovector The Timers are at Level 5 with Timer 1 with priority 3 and Timer 2 with priority 2 and both for autovector The SBC5206 uses IRQ7 to support the ABORT function using the ABORT switch S1 black switch This switch is used to force a non maskable interrupt level 7 priority 3 if the user s program execution should be aborted without issuing a RESET refer to Chapter 2 for more information on ABORT Since 3 2 the ABORT switch is not capable of generating a vector in response to level seven interrupt acknowledge from the processor the debugger programs this request for autovector mode The MC68HC901 reports its interrupt request on IRQ4 line which is set for Level 4 priority 2 It uses the vectored mode for acknowledgment chip select CS1 is used to generate the signal for MC68HC901 MC68HC901 is programmed to generate vectors to FF This should not be changed The line of the MCF5206 is not used on this board However the 1 is programmed for Level 1 with priority 1 and autovector The user may use this line for external interrupt request Refer to MCF5206 User s Manual for more information about the interrupt controller 3 1 7 Internal SRAM The MCF5206 has 512 bytes of internal memory This memory is mapped to 20000000 and is not used by the dBUG It is available to the user 3 1 8 The MCF5206 Registers and Memory Map The memory and I O resources of the SBC5206 are
32. copy of the exception table is made at address 00000000 in DRAM To take over an exception vector the user places the address of the exception handler in the appropriate vector in the vector table located at 00000000 and then points the VBR to 00000000 The Software Watchdog Timer is disabled Bus Monitor enabled and internal timers are placed in a stop condition Interrupt controller registers initialized with unique interrupt level priority pairs The parallel port is configured for I O 3 13 The HIZ Signal The HIZ signal is actively driven by the LSI2032 U4 This Signal is available for monitor on J10 However this signal should not be driven by the user If the user need to drive the HIZ it should be 3 1 done through HIZ_INLOW signal which is available 7 HIZ_INLOW signal feeds the U4 which drives the HIZ signal to the processor 3 1 4 The Clock Circuitry The SBC5206 uses 25MHZ oscillator U8 to provide the clock to CLK pin of the processor This clock also feeds to LSI2032 for its internal use and to produce clock for the ISA timings and MC68HC901 1 4 system clock 3 1 5 Watchdog Timer BUS MONITOR A bus cycle is initiated by the processor providing the necessary information for the bus cycle e g address data control signals etc and asserting the CS or RAS low Then the processor waits for an acknowledgment TA signal from the addressed device before it can complete the bus cycle I
33. d asm 0 0014 40 select the function asm trap 15 make the call 2 5 4 dBUG This function function code 0x0000 transfers the control back to the dBUG by terminating the user code The register context are preserved Assembly example 1 0000 d0 Select the function 15 Make the call exit to dBUG C example void board_exit_to_dbug void asm move l 0x0000 d0 select the function asm trap 15 exit and transfer to dBUG 2 35 3 HARDWARE DESCRIPTION AND RECONFIGURATION This chapter provides a functional description of the SBC5206 board hardware With the description given here and the schematic diagram provided at the end of this manual the user can gain a good understanding of the board s design In this manual an active low signal is indicated by preceding the signal name 3 1 THE PROCESSOR AND SUPPORT LOGIC This part of the Chapter discusses the CPU and general supporting logic on the SBC5206 board 3 1 1 The Processor The microprocessor used in the SBC5206 is the highly integrated MCF5206 32 bit processor The MCF5206 uses ColdFire processor as the core with 512 bytes of instruction cache two UART channels two Timers 512 bytes of SRAM Motorola M Bus Module supporting the one byte wide parallel I O port and the supporting integrated system logic All the registers of the core
34. divided into three groups MCF5206 Internal External resources and the ISA Bus address All the I O registers are memory mapped The MCF5206 has built in logic and up to eight chip select pins 50 to CS7 which used to enable external memory and I O devices In addition there are two RAS lines for DRAM s There are eighteen 32 registers to specify the address range type of access and the method of TA generation for each chip select and RAS pins These registers are programmed by dBUG to map the external memory and devices The SBC5206 uses chip select zero 50 to enable the EPROM Flash ROM refer to Section 3 3 The SBC5206 uses and RAS2 to enable the DRAM SIMM module refer to Section 3 2 CS2 for enabling the MC68HC901 CS1 for Interrupt acknowledge of MC68HC901 and CS3 for ISA Bus I O space The chip select signals CS4 CS5 CS6 and CS7 share their pins with address lines A24 A25 A26 27 and the write enable lines WE3 WE2 WE1 pins for CS6 and CS7 are programmed as write enable line and WEO respectively to support the on board Flash ROM The pins for CS4 and CS5 are programmed as chip select lines The chip select mechanism of the MCF5206 allows the memory mapping to be defined based on the memory space desired User Supervisor Program Data spaces 3 3 All the MCF5206 internal registers configuration registers parallel I O port register
35. e command is di 40000 To disassemble code of the function main the command is di _main 2 12 2 5 7 DL Download Serial DL Usage DL lt offset gt The DL command performs an S record download of data obtained from the serial port The value for offset is converted according to the user defined radix normally hexadecimal If offset is provided then the destination address of each S record is adjusted by offset The DL command checks the destination address for validity If the destination is an address below the defined user space 0 00000000 0 00010000 then an error message is displayed and downloading aborted If the S record file contains the entry point address then the program counter is set to reflect this address Examples To download an S record file through the serial port the command is dl To download an S record file through the serial port and adjust the destination address by 0x40 the command is dl 0x40 2 13 2 4 8 DN Download Network DN Usage DN lt gt lt gt lt gt lt s gt lt o offset gt lt gt The DN command downloads code from the network The DN command handle files which are either S record COFF or ELF formats The DN command uses Trivial File Transfer Protocol TFTP to transfer files from a network host This command only works with 100 NE2000 compatible boards In general the type of file to be downloaded and the name of the file must be specif
36. e you verified that all the items are present remove the board from its protective jacket Check the board for any visible damage Ensure that there are no broken damaged or missing parts If you have not received all the items listed above or they are damaged please contact Arnewsh Inc immediately in order to correct the problem 1 9 2 Preparing the Board for Use The board as shipped is ready to be connected to a terminal and the power supply without any need for modification However follow the steps below to insure proper operation from the first time you apply the power Figure 1 3 shows the placement of the jumpers and the connectors which you need to refer to in the following sections The steps to be taken are a Connecting the power supply b Connecting the terminal 1 9 3 Providing Power to the Board The board accepts two means of power supply connections Connector J3 is a 2 1mm power jack and J4 lever actuated connector The board accepts either 5V regulated supply or 7 5V to 12V DC regulated or unregulated less than one Amp via either connectors Jumper JP1 selects between 5 and 7 5 12V options Make sure the jumper JP1 is in proper location for your option Connect power supply as marked on the board and shown below do not turn the power supply on yet Contact NO Voltage 1 5 Vdc or 7 5 12V 2 Ground Jumper JP1 1 4 TSV regulated 7 5 12V DC regulated or unregulated default 1 9 4 Selecting Terminal
37. ed with unique interrupt level priority pairs The system pins are configured for CS4 CS5 WEO 1 IRQ1 IRQ4 IRQ7 2 3 After initialization the terminal will display Hard Reset DRAM Size IM Copyright 1995 1996 Motorola Inc All Rights Reserved ColdFire MCF5206 EVS Debugger V1 1 xxx 1996 xx xx xx Enter help for help dBUG gt If you did not get this response check the setup Refer to Section 1 10 Note the date 1996 vary in different revisions Other means can be used to re initialize the SBC5206 Computer Board firmware These means are discussed in the following paragraphs 2 2 2 1 SOFT RESET Button SOFT RESET is the red button located in the middle side of the board Depressing this button causes all processes to terminate resets the MCF5206 processor and board logic s and restarts the dBUG firmware Pressing the RESET button would be the appropriate action if all else fails The Reset button issues a soft reset and therefore the memory controller remains functional If total reset is needed the board should be powered down and up again During the power up both the RSTI and HIZ are asserted to cause Hard Reset 2 2 2 2 ABORT Button ABORT is the black button located next to RESET button in the middle side of the board The abort function causes an interrupt of the present processing a level 7 interrupt on MCF5206 and gives control to the dBUG firmware This action
38. ese are listed below 0 7 0 7 SR All control registers on ColdFire are not readable by the supervisor programming model and thus not accessible via dBUG User code may change these registers but caution must be exercised as changes may render dBUG useless A reference to SP actually refers to 7 2 2 OPERATIONAL PROCEDURE System power up and initial operation are described in detail in Chapter 1 This information is repeated here for convenience and to prevent possible damage 2 2 1 System Power up a sure the power supply is connected properly prior to power up b Make sure the terminal is connected to TERMINAL J5 connector c Turn power on to the board 2 2 2 System Initialization The act of powering up the board will initialize the system The processor is reset and dBUG is invoked dBUG performs the following configurations of internal resources during the initialization The instruction cache is invalidated and disabled The Vector Base Register VBR points to the Flash However a copy of the exception table is made at address 00000000 in DRAM To take over an exception vector the user places the address of the exception handler in the appropriate vector in the vector table located at 0 00000000 and then points the VBR to 0x00000000 The Software Watchdog Timer is disabled Bus Monitor enabled and internal timers are placed in a stop condition Interrupt controller registers initializ
39. firmware stored in two 128Kx8 Flash ROM devices provides a self contained programming and operating environment dBUG interacts with the user through pre defined commands that are entered via the terminal The user interface to dBUG is the command line A number of features have been implemented to achieve an easy and intuitive command line interface dBUG assumes that an 80x24 character dumb terminal is utilized to connect to the debugger For serial communications dBUG requires eight data bits no parity and one stop bit 8N1 The baud rate is 19200 but can be changed after the power up The command line prompt is dBUG gt Any dBUG command may be entered from this prompt dBUG does not allow command lines to exceed 80 characters Wherever possible displays data in 80 columns or less dBUG echoes each character as it is typed eliminating the need for any local echo on the terminal side In general dBUG 15 not case sensitive Commands may be entered either in upper or lower case depending upon the user s equipment and preference Only symbol names require that the exact case be used Most commands be recognized by using an abbreviated name For instance entering h is the same as entering help Thus it is not necessary to type the entire command name The commands DI GO MD STEP and TRACE are used repeatedly when debugging dBUG recognizes this and allows for repeated execution of these command
40. iability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights if any or the rights of others WARNING THIS BOARD GENERATES USES AND CAN RADIATE RADIO FREQUENCY ENERGY AND IF NOT INSTALLED PROPERLY MAY CAUSE INTERFERENCE TO RADIO COMMUNICATIONS AS TEMPORARILY PERMITTED BY REGULATION IT HAS NOT BEEN TESTED FOR COMPLIANCE WITH THE LIMITS FOR CLASS A COMPUTING DEVICES PURSUANT TO SUBPART J OF PART 15 OF FCC RULES WHICH ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST SUCH INTERFERENCE OPERATION OF THIS PRODUCT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE INTERFERENCE IN WHICH CASE THE USER AT HIS HER OWN EXPENSE WILL BE REQUIRED TO CORRECT THE INTERFERENCE LIMITED WARRANTY Arnewsh Inc warrants this product against defects in material and workmanship for a period of sixty 60 days from the original date of purchase This warranty extends to the original customer only and is in lieu of all other warrants including implied warranties of merchantability and fitness In no event will the seller be liable for any incidental or consequential damages During the warranty period Arnewsh will replace at no charge components that fail provided the product is returned properly packed and shipped prepaid to Arnewsh at address below Dated proof of purchase such as a copy of the invoice must be enclosed with the shipment We will return the shipment
41. ied to the DN command The c option indicates a COFF download the e option indicates an ELF download I option indicates an image download and the s indicates an S record download The o option works only in conjunction with the s option to indicate and optional offset for S record download The filename is passed directly to the TFTP server and therefore must be a valid filename on the server If neither of the c e i s or filename options are specified then a default filename and filetype will be used Default filename and filetype parameters are manipulated using the set and show commands The DN command checks the destination address for validity If the destination is an address below the defined user space then an error message is displayed and downloading aborted For ELF and COFF files which contain symbolic debug information the symbol tables are extracted from the file during download and used by dBUG Only global symbols kept in dBUG The dBUG symbol table is not cleared prior to downloading so it is the user s responsibility to clear the symbol table as necessary prior to downloading If an entry point address is specified in the S record COFF or ELF file the program counter is set accordingly Examples To download an S record file with the name srec out the command is dn s srec out To download a COFF file with the name coff out the command 15 dn c coff out To download a file
42. its interrupt should be set up as autovector interrupt which directs the processor to a predefined entry into the exception table refer to the MCF5206 User s Manual The processor goes to different service routine via the exception table This table is in the Flash and the VBR points to it However a copy of this table is made in the RAM starting at 00000000 To take over an exception vector the user places the address of the exception handler in the appropriate vector in the vector table located at 00000000 and then points the VBR to 00000000 The MCF5206 has three external interrupt request lines 1 IRQ4 IRQ7 which can be set up either as IPLO 2 lines for encoded interrupt request or dedicated IRQ lines 1 4 and 7 The SBC5206 configures these lines as IRQ lines There are also six internal interrupt requests from Timer1 Timer2 Software watchdog timer UART1 UART2 and MBUS Each interrupt source external and internal can be programmed for any priority level In case of similar priority level a second relative priority between 1 to 3 will be assigned On SBC5206 the internal Timers Software Watchdog Timer M Bus and UART s are disabled and not used However the software watchdog is programmed for Level 7 priority 2 and uninitialized vector The is programmed for Level 3 priority 2 and autovector UART2 is programmed for Level 3 priority 1 and autovector The M Bus is at Level 3 priority 0 and
43. ll work for other instructions as well but note that if the ST command is used with an instruction that will not return i e BRA then the temporary breakpoint may never be encountered and thus may not regain control Examples To pass over a subroutine call the command is step 2 28 2 4 22 SYMBOL Symbol Name Management SYMBOL Usage SYMBOL lt symb gt lt a symb value gt lt r symb gt lt cllls gt The SYMBOL command adds or removes symbol names from the symbol table If only a symbol name is provided to the SYMBOL command then the symbol table is searched for a match on the symbol name and its information displayed The a option adds a symbol name and its value into the symbol table The r option removes a symbol name from the table The c option clears the entire symbol table the option lists the contents of the symbol table and the s option displays usage information for the symbol table Symbol names contained in the symbol table are truncated to 31 characters Any symbol table lookups either by the SYMBOL command or by the disassembler will only use the first 31 characters Symbol names are case sensitive Examples To define the symbol main to have the value 0x00040000 the command is symbol a main 40000 To remove the symbol junk from the table the command is symbol r junk To see how full the symbol table is the command is symbol 8 To display the symbol table the c
44. mand a listing of all defined breakpoints is displayed The r option to the BR command removes a breakpoint defined at address addr If no address is specified in conjunction with the r option then all breakpoints are removed Each time a breakpoint is encountered during the execution of target code its count value is incremented by one By default the initial count value for a breakpoint is zero but the c option allows setting the initial count for the breakpoint Each time a breakpoint is encountered during the execution of target code the count value is compared against the trigger value If the count value is equal to or greater than the trigger value a breakpoint is encountered and control returned to dBUG By default the initial trigger value for a breakpoint is one but the t option allows setting the initial trigger for the breakpoint If no address is specified in conjunction with the c or t options then all breakpoints are initialized to the values specified by the c or t option Examples To set a breakpoint at the function main the command is br _main When the target code is executed and the processor reaches main control will be returned to dBUG To set a breakpoint at the C function bench and set its trigger value to 3 the command is br _bench t 3 When the target code is executed the processor must attempt to execute the function bench a third time before returning control back to dBUG To remove
45. memory and I O capabilities Additional boards may require bus buffers to permit additional bus loading Furthermore provisions have been made in the PC board to permit configuration of the board in a way which best suits an application Options available are up to 32M of DRAM Timer I O ISA bus interface and up to 1M bytes of Flash or 2M bytes of EPROM In addition all of the I O functions of the 5206 are available for the user 1 2 GENERAL HARDWARE DESCRIPTION The SBC5206 board provides the RAM Flash ROM optional Ethernet interface ISA bus RS232 and all the built in I O functions of the MCF5206 for learning and evaluating the attributes of the 5206 The MCF5206 is a member of the ColdFire family of processors It is a 32 bit processor with 32 bits of addressing and 32 lines of data The processor has eight 32 bit data registers eight 32 bit address registers a 32 bit program counter and a 16 bit status register The MCF5206 has a System Integration Module referred to as SIM The module incorporates many of the functions needed for system design These include programmable chip select logic System Protection logic General purpose I O and Interrupt controller logic The chip select logic can select up to eight memory banks or peripherals in addition to two banks of DRAM s The chip select logic also allows programmable number of wait state to allow the use of slower memory refer to MCF5206 User s Manual by Motorola for
46. memory installed in the board When first learning the system the user should limit his her activities to this area of the memory map Address range 00000000 0000 is used by dBUG 2 Ifacommand causes the system to access an unused address i e no memory or peripheral devices are mapped at that address a bus trap error will occur This results in the terminal printing out a trap error message and the contents of all the MCF5206 core registers Control is returned to the monitor 2 3 TERMINAL CONTROL CHARACTERS The command line editor remembers the last five commands in a history buffer which were issued They can be recalled and then executed using control keys Several keys are used as a command line edit and control functions It is best to be familiar with these functions before exercising the system These functions include RETURN return will enter the command line and causes processing to begin Delete Backspace key or CTRL H will delete the last character entered on the terminal CTRL D Go down in the command history buffer you may modify then press enter key CTRL U Go up in the command history buffer you may modify then press enter key CTRL R Recall and execute the last command entered does not need the enter key to be pressed For characters requiring the control key CTRL the CTRL should be pushed and held down and then the other key H should be pressed 2
47. n 2 3 TERMINAL CONTROL CHARACTERS 2 4 COMMAND ea eat td ort ah role 9 2 4 1 BE Memory ew wh aarti ett eh See Sees 2 4 2 BM t MOVE Senedd ee ate es 22443 taco dan Bee 2 4 4 Block tid tes 2 4 5 Daka CON VET SiON OS SE Sa ie eS 2 4 6 Disassemble wos Sa ee Soak de ene 6 2 4 7 Di Donni oa SERA eee ees 2 4 8 DN Download NEEWOEK ee ee Soe tas 22429 GO EXECUTE Soe E S 2 4 10 Execute Till a Temporary Breakpoint ope 18 24 12 RD Internal Registers Display 24 13 RM Internal Registers Modify 2 MD Memory ted as Soke dered 224 2D Modi Ty isa vies A Saw bare TA Se 2414256 RD Register Display wae eae eee ean eo RM Register ModLiy Soe E
48. n of the operation this command performs properly aligned memory accesses Examples To set the byte at location 0x00010000 to be OxFF the command is mm b 10000 FF To interactively modify memory beginning at 0x00010000 the command is mm 10000 2 4 16 RD Register Display RD Usage MM lt width gt addr lt data gt The MM command modifies memory at the address addr The value for address addr may be an absolute address specified as a hexadecimal value or a symbol name Width modifies the size of the data that is modified The value for data may be a symbol name or a number converted according to the user defined radix normally hexadecimal If a value for data is provided then the MM command immediately sets the contents of addr to data If no value for data is provided then the MM command enters into a loop The loop obtains a value for data sets the contents of the current address to data increments the address according to the data size and repeats The loop terminates when an invalid entry for the data value is entered 1 a period This command first aligns the starting address for the data access size and then increments the address accordingly during the operation Thus for the duration of the operation this command performs properly aligned memory accesses Examples To set the byte at location 0x00010000 to be OxFF the command is mm b 10000 FF To interactively modify memory beginning at 0x00010000 the command is
49. ncremented to 0x00040004 and the next 32 bit value is read and compared To search the BSS section defined by the symbols bss_start and bss_end for the byte value OxAA the command is bs b bss_start bss_end AA 2 10 2 4 5 DATA Data Conversion DATA Usage DATA data The DATA command displays data in both decimal and hexadecimal notation The value for data may be a symbol name or an absolute value If an absolute value passed into the DATA command is prefixed by Ox then data is interpreted as a hexadecimal value Otherwise data is interpreted as a decimal value All values are treated as 32 bit quantities Examples To display the decimal equivalent of 0x1234 the command is data 0x1234 To display the hexadecimal equivalent of 1234 the command is data 1234 2 4 6 DI Disassemble DI Usage DI lt addr gt DI command disassembles target code pointed to by addr value for addr may be an absolute address specified as a hexadecimal value or a symbol name Wherever possible the disassembler will use information from the symbol table to produce a more meaningful disassembly This is especially useful for branch target addresses and subroutine calls The DI command attempts to track the address of the last disassembled opcode If no address is provided to the DI command then the DI command uses the address of the last opcode that was disassembled Examples To disassemble code that starts at 0 00040000 th
50. o be 19200 the command is set baud 19200 Now press the RESET button RED or RESET command for the new baud to take effect This baud will be programmed in Flash ROM and will be used during the power up In order to use the KNE2000TLC Ethernet ISA card in the system the debugger need to know its IRQ and its base address The Kingston Technology Corporation Ethernet card KNE2000TLC has a default base address of 300 and uses IRQ3 To set up the debugger for Ethernet communication the following commands should be issued first set nicbase 300 set nicirq 3 2 26 2 4 20 SHOW Show Configuration SHOW Usage SHOW option SHOW The SHOW command displays the settings of the user configurable options within dBUG Most options configurable via the SET command can be displayed with the SHOW command If the SHOW command is issued without any option it will show all options Examples To display all the current options the command is show To display the current baud rate of the board the command is show baud To display the TFTP server IP address the command is show server 2 27 2 4 21 STEP Step Over ST Usage STEP The ST command can be used to step over a subroutine call rather than tracing every instruction in the subroutine The ST command sets a breakpoint one instruction beyond the current program counter and then executes the target code The ST command can be used for BSR and JSR instructions The ST command wi
51. ommand is symbol 1 2 29 2 4 23 TRACE Trace Into TR Usage TRACE lt num gt The TRACE command allows single instruction execution If num is provided then num instructions are executed before control is handed back to dBUG The value for num is a decimal number The TRACE command sets bits in the processors supervisor registers to achieve single instruction execution and the target code executed Control returns to dBUG after a single instruction execution of the target code Examples To trace one instruction at the program counter the command is tr To trace 20 instructions from the program counter the command is tr 20 2 30 2 4 24 UPDBUG Update the dBUG Image UPDBUG Usage UPDBUG The UPDBUG command is used for updating the dBUG image in Flash When updates to the MCF5206 EVS dBUG are available the updated image is downloaded to address 0x00010000 The new image is placed into Flash using the UPDBUG command The user is prompted for verification before performing the operation Use this command with extreme caution as any error can render dBUG and thus the board useless 2 4 25 UPUSER Update User Code In Flash UPUSER Usage UPUSER The UPUSER command places user code and data into space allocated for the user in Flash the last 128K of Flash ROM To place code and data in user Flash the image is downloaded to address 0x00010000 and the UPUSER command issued This commands programs the entire upper 128K
52. or this routine then use the following code which takes this into account 1 LINK a6 0 produced by C compiler asm move l 8 6 41 put ch into d1 asm move l 0x0013 d0 select the function asm trap 15 make the call UNLK a6 produced by C compiler else compiler does not produce a LINK UNLK pair the use the following code move l 4 sp d1 put ch into d1 asm move l 0x0013 d0 select the function asm trap 15 make the call endif 2 5 2 _ This function function code 0x0010 returns an input character from terminal to the caller The returned character is in D1 Assembly example 1 0010 d0 Select the function 15 Make the call the input character is in d1 C example int board_in_char void asm move l 0x0010 d0 select the function asm trap 15 make the call 2 34 asm move l 41 40 put the character in dO 2 5 3 CHAR_PRESENT This function function code 0x0014 checks if an input character is present to receive A value of zero is returned in DO when no character is present A non zero value in DO means a character is present Assembly example 1 0014 d0 Select the function 15 Make the call dO contains the response yes no C example int board_char_present voi
53. ply Connector J3 and J4 3 7 4 The Connector U5 sisi oi eee The Auxiliary Communication Connector J6 3 7 6 The Processor Expansion Bus J7 J9 3726 The Debug Conneceor 3 7 8 The ISA 3 28 THE 5865206 JUMPERS ae ee ete APPENDIX NETWORK DOWNLOAD 1 Configuring dBUG for Network Downloads 1 1 Required Network Parameters A 1 2 Configuring dBUG Network Parameters A 1 3 Troubleshooting Network Problems ii OD OOO 1 INTRODUCTION TO THE SBC5206 BOARD 1 1 INTRODUCTION The SBC5206 is a versatile single board computer based on MCF5206 ColdFire Processor It may be used as a powerful microprocessor based controller in a variety of applications With the addition of a terminal it serves as a complete microcomputer for development evaluation training and educational use The user must only connect an RS 232 compatible terminal or a personal computer with terminal emulation software and a power supply to have a fully functional system Provisions have been made to connect this board to additional user supplied boards via the Microprocessor Expansion Bus connectors to expand
54. r further instructions 1 11 SBC5206 JUMPER SETUP The jumpers on the board are discussed in Chapter 3 However a brief discussion of the jumper settings are as follows 1 Jumper JP1 This jumper selects the power supply selection TSV regulated 7 5 12 DC regulated or unregulated default 1 9 2 Jumper 7 2 This jumper selects between Flash and EPROM 3105 Select Flash default and 4to6 3 Jumper JP3 This jumper selects the size of EPROM or Flash 7109 Selects 128Kx8 EPROM Flash and 8 to 10 1 12 USING THE BDM The MCF5206 has a built in debug mechanism referred to as BDM The SBC5206 has the necessary connector J8 to facilitate this connection In order to use the BDM simply connect the 26 pin IDC header at the end of the BDM cable provided by the BDM development tool third party tool to the J8 connector No special setting is needed Refer to the BDM User s Manual for additional instructions 2 USING THE MONITOR DEBUG FIRMWARE The SBC5206 Computer Board has a resident firmware package that provides a self contained programming and operating environment The firmware named dBUG provides the user with monitor debug disassembly program download and I O control functions This Chapter is a how to use description of the dBUG package including the user interface and command structure 2 1 WHAT IS dBUG dBUG is a resident firmware package for the ColdFire family Computer Boards The
55. r to allow the use of off the shelf ISA I O cards The main reason for this connector is to install an Ethernet card to support down load via network 1 8 SYSTEM CONFIGURATION The SBC5206 board requires only the following items for minimum system configuration Fig 1 2 a The SBC5206 board provided b Power supply 5 Vdc regulated or 7 5V to 12V DC minimum of 0 4 Amp c RS 232C compatible terminal or a PC with terminal emulation software 1 3 Communication cable provided Refer to next sections for initial setup 1 9 INSTALLATION AND SETUP The following sections describe all the steps needed to prepare the board for operation Please read the following sections carefully before using the board When you are preparing the board for the first time do not use the optional features Ethernet ISA BUS The minimum configuration does not require any modifications After the board is functional in its minimal configuration you may use other features by following the instructions provided in the following sections 1 9 1 Unpacking Unpack the computer board from its shipping box Save the box for storing or reshipping Refer to the following list and verify that all the items are present You should have received a SBC5206 Single Board Computer b SBC5206 User s Manual this documentation c One communication cable WARNING AVOID TOUCHING THE MOS DEVICES STATIC DISCHARGE CAN AND WILL DAMAGE THESE DEVICES Onc
56. rier Detect shorted to 4 amp 6 Output eceive data Tnput Ground Output lear to Send shorted to 7 ot Used DIRECTION Output Output 45 Output Output __ 3 7 5 The Auxiliary Serial Communication Connector J6 The 5206 has two built in UART s These channels are not used by the SBC5206 dBUG and they are available to the user The signals of these channels are available on J7 The signals are also run trough RS 232 driver receivers and are available on J6 The available signals form a working subset of the RS 232C standard Table 3 8 shows the pin assignment for J6 TABLE 3 8 The J6 Connector pin assignment 3 9 TCNAL NAME onnected to pin 6 and 8 2 eceive Data ransmit Data Ground onnected to 1 and 8 7 lear to Send 8 equest to Send connected to 1 amp 6 ot Used gt 3 7 6 The Processor Expansion J7 J9 and J10 All the processors signals are available on three burg headers J7 J9 and J10 for future expansion Although these signals are not buffered they can drive at least one TTL load with some having more than one TTL load capability User may refer to the data sheets for the major parts and the schematic at the end of this manual to obtain an accurate loading capability All the primary signal
57. s DUART registers and system control registers are mapped by MBAR register at 1K byte boundary It is mapped to 10000000 by dBUG For complete map of these registers refer to the MCF5206 User s Manual The SBC5206 board can have up to 32M bytes of DRAM installed The first 32M bytes are reserved for this memory Refer to Section 3 2 for a discussion of RAM The dBUG is programmed in two 29F010 Flash ROM s which only occupies 256K bytes of the address space The first 128K bytes are used by dBUG and the second half is left for user Refer to section 3 3 The MC68HC901 is used as dBUG serial communication baud rate generator and ISA Bus interrupt request Refer to section 3 4 2 The ISA Bus interface maps all the I O space of the ISA bus to the MCF5206 memory at address 04000000 Refer to section 3 6 TABLE 3 1 The SBC5206 memory map ADDRESS RANGE SIGNAL and DEVICE 00000000 0 1 RAS2 Up to 32M bytes of DRAM s 510000000 5100003 Internal Module registers 1 Refer to the text for more detail All the unused area of the memory map is available to the user 3 1 9 Reset Vector Mapping After reset the processor attempts to get the initial stack pointer and initial program counter values from locations 000000 000007 the first eight bytes of memory space This requires the board to have a nonvolatile memory device in this range with proper information However in some systems it is preferred to have
58. s to from the processor needed for simple memory expansion are available on J9 The remaining expansion signals and I O signals are available on J7 and J10 Therefore a single 60 wire flat ribbon cable with the IDC connectors may be used for most of future expansions Tables 3 9 3 11 and 3 12 show the pin assignment for J7 J9 and J10 respectively 3 7 7 The Debug Connector J8 The MCF5206 does have background Debug Port Real Time Trace Support and Real Time Debug Support The necessary signals are available at connector J8 Table 3 10 shows the pin assignment 3 7 8 The ISA Bus Connector P1 The SBC5206 can utilize the ISA Bus 16 bit I O cards The P1 connector is ISA Bus compatible connector Table 3 13 shows the pin assignment TABLE 3 9 The J7 Connector pin assignment PIN NO SIGNAL NAME 54151 gt gt gt _ w Q N N a i 8 9 2 16 18 20 i 2 298 127 6 2 8 5 O 51515 0 HIZ_INLOW 3 11 TABLE 3 10 J8 Connector pin assignment PIN SIGNAL NAME o Connect o Connect RESET 5 Volts N Ground 2 5 5 2 9 2 02010 01512 5 5 2 5 gt gt 6 5 5 Connect N Z o
59. s with minimal typing After a command is entered simply press lt RETURN gt or lt gt to invoke the command again The command is executed as if no command line parameters were provided An additional function called the TRAP 15 handler allows the user program to utilize various routines within dBUG The TRAP 15 handler is discussed at the end of this chapter The operational mode of dBUG is demonstrated in Figure 2 1 After the system initialization the board waits for a command line input from the user terminal When a proper command is entered the operation continues in one of the two basic modes If the command causes execution of the user program the dBUG firmware may or may not be re entered depending on the discretion of the user For the alternate case the command will be executed under control of the dBUG firmware and after command completion the system returns to command entry mode 2 1 COMMAND LINE CAUGE USER PROGRAM EXECUTION Figure 2 1 Flow Diagram of Operational Mode 2 2 During command execution additional user input may be required depending on the command function For commands that accept an optional lt width gt to modify the memory access size the valid values are 8 bit byte access 16 bit word access 1 32 bit long access When no lt width gt option is provided the default width is W 16 bit The core ColdFire register set is maintained by dBUG Th
60. t filename to be used for network download if no name is provided to the DN command filetype This is the default file type to be used for network download if no type is provided to the DN command Valid values 5 image and elf autoboot This option allows for the automatic downloading and execution of a file from the network This option can be used to automatically boot an operating system from the network Valid values are and off This option is not implemented on the current of dBUG nicbase this is base address of the network interface card When using network card the base address of that card is needed by the dBUG in order to communicate with it This command is used to inform the dBUG of the address of the card dBUG does not set or configure the interface card It only uses this address to access the card The user should provide this information to dBUG nicirq this is the IRQ used in the network interface card When using network card the IRQ used by that card is needed by the dBUG in order to communicate with it This command is used to inform the dBUG of the IRQ of the card dBUG does not set or configure the interface card It only uses this IRQ to access the card The user should provide this information to dBUG Examples To see all the available options and supported choices the command is set 2 25 set the baud rate of the board t
61. t is possible due to incorrect programming that the processor attempts to access part of the address space which physically does not exist In this case the bus cycle will go on for ever since there is no memory or I O device to provide an acknowledgment signal and the processor will be in an infinite wait state The MCF5206 has the necessary logic built into the chip to watch the duration of the bus cycle If the cycle is not terminated within the preprogrammed duration the logic will internally assert Transfer Error signal In response the processor will terminate the bus cycle and an access fault exception trap will take place The duration of the Watchdog is selected by BMTO 1 bits in System Protection Register The dBUG initializes this register with the value 00 which provides for 1024 system clock time out 3 1 6 Interrupt Sources The ColdFire family of processors can receive interrupts for seven levels of interrupt priorities When the processor receives an interrupt which has higher priority than the current interrupt mask in status register it will perform an interrupt acknowledge cycle at the end of the current instruction cycle This interrupt acknowledge cycle indicates to the source of the interrupt that the request is being acknowledged and the device should provide the proper vector number to indicate where the service routine for this interrupt level is located If the source of interrupt is not capable of providing a vector
62. ters of different modules inside the MCF5206 In the command line the module refers to the module name where the register is located register refers to the specific register needed and data is the new value to be written into that register The registers are organized according to the module to which they belong The available modules on the MCF5206 SIM UART2 TIMER M Bus DRAMC Chip Select Refer to MCF5206 User s Manual Example irm timer tmrl 0021 swrite 0021 into register in the TIMER module 2 19 2 4 14 MD Memory Display MD Usage MD lt width gt lt begin gt lt end gt The MD command displays a contiguous block of memory starting at address begin and stopping at address end The value for addresses begin and end may be an absolute address specified as a hexadecimal value symbol name Width modifies the size of the data that is displayed Memory display starts at the address begin If no beginning address is provided the MD command uses the last address that was displayed If no ending address is provided then MD will display memory up to an address that is 128 beyond the starting address This command first aligns the starting address for the data access size and then increments the address accordingly during the operation Thus for the duration of the operation this command performs properly aligned memory accesses Examples To display memory at address 0x00400000 the command is md
63. to download filename e of the file to download filetype of S record COFF Elf or Image Your local system administrator can assign a unique IP address for the board and also provide you the IP addresses of the gateway netmask and TFTP server Fill out the lines below with this information Client IP IP address of the board Server IP a IP address of the TFTP server Gateway ee ee IP address of the gateway Netmask ee Network netmask A 1 2 Configuring dBUG Network Parameters Once the network parameters have been obtained dBUG must be configured The following commands are used to configure the network parameters set client lt client IP gt set server lt server IP gt set gateway lt gateway IP gt set netmask lt netmask gt For example the TFTP server is named santafe and has IP address 123 45 67 1 The board is assigned the IP address of 123 45 68 15 The gateway IP address is 123 45 68 250 and the netmask is 255 255 255 0 The commands to dBUG are set client 123 45 68 15 set server 123 45 67 1 set gateway 123 45 68 250 set netmask 255 255 255 0 The last step is to inform dBUG of the name and type of the file to download Prior to giving the name of the file keep in mind the following Most if not all TFTP servers will only permit access to files starting at a particular sub directory This is a security feature which prevents reading of arbitrary files by
64. unknown persons For example SunOS uses the directory tftp_boot as the default TFTP directory When specifying a filename to a SunOS server all filenames are relative to tftp_boot As result you normally will be required to the file to download into the directory used by the TFTP server A default filename for network downloads is maintained by dBUG To change the default filename use the command set filename lt filename gt When using the Ethernet network for download either S record COFF Elf or Image files may be downloaded A default filetype for network downloads is maintained by dBUG as well To change the default filetype use the command set filetype lt srecordlcofflelflimage gt Continuing with the above example the compiler produces an executable COFF file a out This file is copied to the tftp_boot directory on the server with the command rcp a out santafe tftp_boot a out Change the default filename and filetype with the commands set filename a out set filetype coff Finally perform the network download with the dn command The network download process uses the configured IP addresses and the default filename and filetype for initiating a TFTP download from the TFTP server A 1 3 Troubleshooting Network Problems Most problems related to network downloads are a direct result of improper configuration Verify that all IP addresses configured into are correct This is
65. using the default filetype with the name bench out the command 15 dn bench out To download a file using the default filename and filetype the command is dn This command requires proper Network address and parameter setup Refer to Appendix A for this procedure Also refer to SET command to setup the base address and the IRQ for the card 2 14 2 4 9 Usage GO lt addr gt The GO command executes target code starting at address addr The value for addr may be an absolute address specified as a hexadecimal value or a symbol name If no argument is provided the GO command begins executing instructions at the current program counter When the GO command is executed all user defined breakpoints are inserted into the target code and the context is switched to the target program Control is only regained when the target code encounters a breakpoint illegal instruction or other exception which causes control to be handed back to dBUG Examples To execute code at the current program counter the command is go To execute code at the C function main the command is go To execute code at the address 0x00040000 the command is go 40000 2 15 2 4 10 Execute Temporary Breakpoint GT Usage GT lt addr gt The GT command executes the target code starting at address in PC whatever the PC has until a temporary breakpoint as given in the command line is reached Example

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