M5235BCC EVB
Contents
1. d meteo tei ames ue 37 TRAP315 BUNGCTIONS tei eir RR oi ES iO WE FE DERE e eR 38 OWT CHAR d snos ene eed d 38 IN GHAR EE 39 CHAR PRESEN E EE EET Ce PES SENE PEUT 39 EXIT ein ue 40 CMM 5235 USER MANUAL V1 0 09 14 04 Cautionary Notes 1 Electrostatic Discharge ESD prevention measures should be applied whenever handling this product ESD damage is not a warranty repair item 2 Axiom Manufacturing reserves the right to make changes without further notice to any products to improve reliability function or design Axiom Manufacturing does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under patent rights or the rights of others 3 EMC Information on the CMM 5235 board a This product has been tested and meets with requirements of CE and the FCC as a CLASS A product when applied with appropriate power supply and cables b This product is designed and intended for use as a development platform for hardware or software in an educational professional laboratory or as a component in a larger system c In a domestic environment this product may cause radio interference in which case the user may be required to take adequate prevention measures2. d Attaching additional wiring to this product or modifying the products operation from the factory default as shipped may effect its performance and also cause interference with other apparatus in the immediate vicinity If such interference is detected suitable mitigating measures should be taken Terminology This development board applies option selection jumpers Terminology for application of the option jumpers is as follows Jumper on in or installed jumper is a plastic shunt that fits across 2 pins and the shunt is installed so that the 2 pins are connected with the shunt Jumper off out or idle jumper or shunt is installed so that only 1 pin holds the shunt no 2 pins are connected or jumper is removed It is recommended that the jumpers be placed idle by installing on 1 pin so they will not be lost This development board applies CT cut trace or option selections that require a soldering tool to install or remove This type connection places an equivalent Jumper Installed type option Applying the connection can be performed by installing a 0 ohm resistor component or small wire between the option pads See the Options section for more details CMM 5235 USER MANUAL V1 0 09 14 04 FEATURES M5235BCC CMM 5235 is a low cost evaluation module in Business Card Controller format for the Freescale MCF5235 Coldfire microcontroller Application development is quick and easy with the included Axiom CMM 5235 m
3. CMM 5235 USER MANUAL V1 0 dBUG Commands After the system initialization the dBUG 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 at the discretion of the user s program 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 09 14 04 aBUG Command Table MNEMONIC SYNTAX DESCRIPTION ASM asm lt lt addr gt stmt Assemble BC bc addr2 length Block Compare BF bf width begin end data inc Block Fill BM bm begin end dest Block Move BR br addr lt gt lt count gt lt t trigger gt Breakpoint BS bs width begin end data Block Search DC dc value Data Convert DI di lt addr gt Disassemble DL dl offset Download Serial DLDBUG didbug Download dBUG Update DN dn lt gt e lt i gt lt 5 gt lt o offset gt Download Network lt filename gt FL fl lt command gt dest lt src gt size Flash write or erase GO go lt addr gt Execute GT gt addr Execute To HELP help command Help IRD ird lt module register gt Internal Internal Register Display IRM irm module register data Internal Registe
4. External reset is provided by the RESET switch LV1 low voltage detector or user applied connection to the RESET signal on the MCU PORT If the main 3 3V supply is below operating level the LV1 voltage detector will cause the MCF5235 to stay in the RESET condition RESET switch provides for manual application of the MCF5235 RESET signal Both the RESET switch and LV1 provide a 150ms delay after release for the system to stabilize Application of RESET will cause the dBUG monitor or user application to initialize the MCF5235 Previous SDRAM memory content and operating state of the MCF5235 will be lost INDICATORS Indication is provided for power supply status CPU Reset status and Ethernet status The indications may be applied to determine proper operation of the development board Indicator Summary INDICATOR COLOR OPERATION DEFAULT CONDITION 3 3V Green 3 3V power present ON RESET RED CPU is in RESET state OFF LNK Green Ethernet has Link ON with Network connected 100 Green Ethernet is operating 100 base ON if 100 base network OFF if 10 base network DUP Green Ethernet is operating full duplex ON if full duplex network COL RED Ethernet is experiencing packet OFF unless network has a collisions problem ABORT Switch The ABORT switch provides for manual application of the IRQ7 interrupt signal This operation will allow the dBUG monitor to stop execution of a user program and maintain the CP
5. Ox7FFFFFFF Note Applying BDM JTAG development port tools does not require following the dBUG memory map 0x00000000 External SDRAM Memory User Vector table if applied See Interrupt Support for more information 0x000003FF 1K bytes 0x00000400 External SDRAM Memory dBUG reserved ram space 0x0001FFFF 128K bytes 0x00010000 External SDRAM Memory User ram or development memory space 16M bytes 32 bits wide 0x01000000 0x1 FFFFFFF Not applied memory space reserved 0x20000000 MCF5235 Internal SRAM memory space user space 2000 64K bytes 32 bits wide 0x20010000 Not applied memory space reserved ISBAR MCF5235 Internal register and peripheral space Refer to MCF5235 User Manual for details 0x80000000 OXFFDFFFFF Not applied memory space reserved OxFFEO00000 dBUG Monitor Flash Memory Space reserved OxFFESFFFF 256K bytes OxFFE40000 User External Flash Memory Space OxFFFFFFFF 1 8M bytes 16 bits wide 16 09 14 04 The Vector Base Register VBR points to the dBUG Flash memory space However a copy of the exception table is made at address 00000000 in SDRAM memory space 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 register to 0 00000000 See the MCF5235 User Guide and ColdFire Programmers Reference Manual
6. set client 123 45 68 15 set server 123 45 67 1 set gateway 123 45 68 250 set netmask 255 255 255 0 set mac 00 CF 52 82 EB 01 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 that the host TFTP server will require the file to be transferred be in the TFTP server s assigned base directory or a subdirectory from the base directory depends on security settings See the TFTP server software setup configuration and help file to locate or change this directory A default file name for network downloads is maintained by dBUG To change the default file name use the command set filename filename When using the Ethernet network for download either S record COFF ELF or Image files may be downloaded A default file type for network downloads is maintained by dBUG as well To change the default file type use the command set filetype S record coff elf image 19 CMM 5235 USER MANUAL V1 0 09 14 04 Continuing with the above example the Coldfire C compiler produces an executable COFF file example out This file is copied to the TFTP server base directory for download to dBUG Note If the TFTP server base directory is assigned to the compiler output files directory on the host PC no file copy to another directory is required Change the dBUG default filename and file type with the commands set filename example out set filetype coff Finally
7. The value for data may be a symbol name or a number converted according to the user defined radix normally hexadecimal The optional value inc can be used to increment or decrement the data value during the fill 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 0 2 0000 and ending at 0 4 0000 with the value 0x1234 the command is bf 20000 40000 1234 To fill a block of memory starting at 0 20000 and ending at 0 4 0000 with a byte value of OxAB the command is bf b 20000 40000 AB 21 CMM 5235 USER MANUAL V1 0 09 14 04 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 To fill a block of memory starting at 0 2 0000 and ending at 4 0000 with data that increments by 2 for each lt width gt the command is bf 20000 40000 0 2 BM Block Move Usage BM begin end dest The BM command moves a block of memory starting at address begin and 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 values for addresses begin end and dest may be absolute addresses specified as hexadecimal values or symbol names If
8. perform the network download with the dn command The network download process uses the configured IP addresses and the default filename and file type for initiating a TFTP download from the TFTP server Appendix 1 dBUG Command Set ASM Assembler Usage ASM lt lt gt stmt gt The ASM command is a primitive assembler The lt stmt gt is assembled and the resulting code placed at lt addr gt This command has an interactive and non interactive mode of operation The value for address lt addr gt may be an absolute address specified as a hexadecimal value or a symbol name The value for stmt must be valid assembler mnemonics for the CPU For the interactive mode the user enters the command and the optional lt gt If the address is not specified then the last address is used The memory contents at the address are disassembled and the user prompted for the new assembly If valid the new assembly is placed into memory and the address incremented accordingly If the assembly is not valid then memory is not modified and an error message produced In either case memory is disassembled and the process repeats The user may press the Enter or Return key to accept the current memory contents and skip to the next instruction or a enter period to quit the interactive mode In the non interactive mode the user specifies the address and the assembly statement on the command line The statement is the as
9. Execute software to be tested under dBUG monitor or development tool control after software is tested and operational port and program application into FLASH memory to execute new application when power is applied Reference Documentation Reference documents are provided on the support CD in Acrobat Reader format CMM 5235 man pdf This user manual MCF5235UM pdf MCF5235 Device User Manual CFPRM pdf Coldfire Programmers Reference Manual with instruction set CMM 5235 SCH CMM5235 board schematics CMM 5235 USER MANUAL V1 0 09 14 04 CMM 5235 Startup Follow these steps to connect and power on the board for the default dBUG monitor operation 1 Carefully unpack the CMM 5235 and observe ESD preventive measures while handling the CMM 5235 development board 2 Load the ColdFire support CD into the PC and install the AxIDE terminal software from the utilities directory OR configure HyperTerminal for a direct connection to the PC COM port to be applied for serial communication with the CMM 5235 board Set the baud rate to 19 2K baud 8 data bits 1 stop bit and no parity Software XON XOFF flow control should be enabled for flash memory support operations Use the AxIDE V tool bar button to configure the COM port on the PC 3 Connect the CMM 5235 board COM serial port connector to the host PC COM port with the provided 9 pin serial cable 4 Apply power to the development board by installing the wall plug po
10. go To execute code at the C function main the command is go main To execute code at the address 0x00040000 the command is go 40000 GT Execute To Address Usage GT addr The GT command inserts a temporary software breakpoint at addr and then executes target code starting at the current program counter The value for addr may be an absolute address specified as a hexadecimal value or a symbol name When the GT command is executed all 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 an exception which causes control to be handed back to dBUG Examples To execute code up to the C function bench the command is gt bench To execute code up to the address 0x00080004 the command is 28 CMM 5235 USER MANUAL V1 0 09 14 04 gt 80004 IRD Internal Register Display Usage IRD lt module register gt This command displays the internal registers of the different modules inside the MCF5235 In the command line module refers to the module name where the register is located and register refers to the specific register to display The registers are organized according to the module to which they belong The available modules on the MCF5235 are SCM CSO CS1 CS2 CS3 C84 CS5 CS6 GPIO QSPI DMAO DMA1 DMA2 DMAS3 UARTO UART1 UART2 SDRAMC TIMERO TIMER1 2 T
11. into the flash please see the DL command Examples To view the flash device sector information the command is fl To copy 0x4000 16K bytes of data from internal SRAM 0x20000000 to external flash at 40000 the command is fl write FFE40000 20000000 4000 Note that the above command will cause dBUG to prompt the user to continue due to the addressed sector size is larger than 0x4000 bytes in this case User should type in YES to continue or any other key to stop the operation Sector range values 1000 4K bytes 2000 8K bytes 8000 32K bytes 10000 64 K bytes To erase all user sectors of the external flash the command is fl erase FFE40000 1C0000 27 CMM 5235 USER MANUAL V1 0 09 14 04 GO Execute user code Usage GO lt 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 that causes control to be handed back to dBUG The GO command is repeatable Examples To execute code at the current program counter the command is
12. source 3 3V Indicator is ON You should measure a minimum of 9 volts between the GND and VIN GND Test Point and ETPU Port pin 20 with the standard power supply provided If no power indications or voltage is found verify the wall plug connections to AC outlet and the PWR jack power connector Disconnect all external connections to the board except for COM to the PC and the wall plug and check operation again Contact support axman com by email for further assistance Provide board name and describe problem 14 CMM 5235 USER MANUAL V1 0 09 14 04 dBUG MONITOR OPERATION dBUG is a firmware resident development environment operated by the MCF5235 as a primary control program The monitor provides serial and Ethernet communication for loading and controlling the execution of software under test User should note that the monitor occupies the first or lower address 256K bytes of the external flash memory Caution should be applied in the user application not to corrupt the monitor flash memory space If the monitor is corrupted a development port tool will be required to restore operation dBUG Communication Primary user interface to the dBUG monitor is by command lines that are entered into the serial port These commands are defined in the following table dBBUG Commands For serial communications dBUG requires eight data bits no parity and one stop bit 8N1 with XON XOFF soft flow control The default baud rate is 19200 howev
13. 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 4 0000 and ending at 7 0000 to the location 0x200000 the command is bm 40000 70000 200000 To copy the target code s data section defined by the symbols data_start and data_end to 0x200000 the command is bm data_start data_end 200000 NOTE Refer to upuser command for copying code data into Flash memory BR Breakpoints Usage BR addr lt r gt c count gt lt t trigger 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 command 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 22 CMM 5235 USER MANUAL V1 0 09 14 04 Each time a breakpoint is encountered during the execution of target
14. tuto ee tA Ub d 20 BC BLOCK COMPARE dee EENES Aes 21 MIENNE NP ENERGIE 21 5 nenas aede need CANES fen Vea BAR Na BO SES RW ente Weedon de Oud ee Sei vieta iere vate g ey 22 BR BREAKPOINTS Aseo cb eme Rime cete 22 i ge OG I ODIO GUI ORO GIO 23 DG DATA CONVERSION enm NINE 24 DI DISASSEMBLE thc ex teed cen nade 24 DOWNLOAD CONSOLE BR een 25 DLDBUG DOWNLOAD DBUG 2 2 424 44 2 00401 000000 000000000000 enter ai aardas E Er 26 DN DOWNLOAD 1 26 FI FLASH LOAD OR iere tte eet eterne 27 GO EXECUTEUSER CODE 3 eere edet er re eee tete re o edet defe dee dete e ee 28 GT EXECUTE TO ADDRESS nnn n nnn 28 CMM 5235 USER MANUAL V1 0 09 14 04 IRD INTERNAL REGISTER DISPLAY cccccsccccccecsessssscecececs
15. 1 These signals have peripheral connection on the CMM 5235 board 12 CMM 5235 USER MANUAL V1 0 09 14 04 BUS_PORT The BUS PORT provides 64K Byte access space with 3 selects to peripherals All signals on the BUS PORT have a peripheral connection on the CMM 5235 board Application of the BUS signals will require the addition of buffers on the external connections ETPU_PORT The ETPU PORT provides access to the MCF5235 ETPU signals TPU channels 0 15 are provided I O access on the port TPUCHO TPUCH 1 TPUCH2 TPUCHS TPUCH4 5 TPUCH6 TPUCH7 TPUCH8 9 TPUCH10 TPUCH 11 TPUCH12 TPUCH13 TPUCH14 TPUCH15 TCRCLK GND 3 3V VIN 13 CMM 5235 USER MANUAL V1 0 09 14 04 TROUBLESHOOTING CMM 5235 is fully tested and operational before shipping If it fails to function properly inspect the board for obvious physical damage first Verify the communications setup as described under GETTING STARTED The most common problems are improperly configured options or communications parameters 1 2 Verify default option settings and RESET the board Make sure that the RESET line is not being held low or the RESET indicator is not on constantly Verify that your COM communications port is working by substituting a known good serial device or by doing a loop back diagnostic if you applied a different baud rate with the dBUG SET command make sure the terminal software is set correctly Verify the power
16. AN I O m Port 20 pins 16 channels V supply BUS Port 34 pins 64K Address 8 bit Data Bus 3 selects Oj quas BDM JTAG Port 26 Pins development port IET 50 COM Port UARTO w RS232 DB9 S Ribbon Connector 95 10 100 Ethernet Port w 45 Connector Z 4 status Indicators Auto MDI X crossover CAN port w 1Mbaud transceiver on MCU Port RESET switch and indicator M5235BCC CMM 5235 ABORT IRQ7 switch Regulated 3 3V and 1 5V power supply w indicator BCC kit supplied with DB9 Serial Cable Cat 5E Ethernet cable BDM Development Cable Utility Support CD Manuals and Universal Wall Adapter power supply Specifications Board Size 3 5 x 2 2 inches w 4 x 2 mounting holes Power Input 5 30VDC 12VDC typical Current Consumption 120 12VDC input typical 100Mhz clock The CMM 5235 is provided operating the Freescale dBUG monitor firmware The monitor allows serial interface to a PC host for file loading and terminal command line operations Ethernet operation supports TFTP file downloads into the development board The support CD contains GNU Tool package device data sheets PC Terminal software and user manuals The kit is plug in and play out of the box with a wall adapter power supply No additional hardware or software is required CMM 5235 USER MANUAL V1 0 09 14 04 GETTING STARTED The CMM 5235 single board computer is a fully asse
17. CMM 5235 Evaluation Module for Freescale MCF5235 MCU Hardware User Manual 5235 EVB M5235 Business Card Controller Axiom Manufacturing 2813 Industrial Lane e Garland TX 75041 Email Sales axman com Web http www axman com CMM 5235 USER MANUAL V1 0 09 14 04 CONTENTS CAUTIONARY NOTES DE M 3 TERMINOLOGY 3 BEA TURES PEE 4 GETTING STARTED E 5 SOFTWARE DEVELOPMENT ettet eee rA t ERI e t ERE Pe EAT E t E OD E EA ee 5 REFERENCE DOCUMENTATION ek cetecer t oce Ne ERU ERE EE sucnbanede Gnade duet bene EXER 5 CMM 5235 S TARTUP Ree e ence e te e dee iecit erit err 6 CMM 5235 HARDWARE CONFIGURATION AND ee ee eee ense seen nest etos 6 POWER SUBPLY steeletun ipe mem I Ma D Pee IDEE 7 dI 7 ERAD LEED PESA E ET E AE A EU 7 APOR OV E Re i i ROO 7 CEP 8 MEMORY xu D O P Hee ict 8 COMMUNICATION PERIPHERALS repere reete pe Ev d Eu Cere Cdp 8 OPTION JUMPEBRS enel owe EES eg Sea MU 8 5235 PORTS AND CONNECTORS sissiscsecssccssecsssscsessecssocesevensosssscieceessacsesienscecsciassecsesssiessesecbectesssoscadsss
18. FFF Chip Selects CSO Flash 32 CMM 5235 USER MANUAL V1 0 09 14 04 RD Register Display Usage RD lt reg gt The RD command displays the register set of the target If no argument for reg is provided then all registers are displayed Otherwise the value for reg is displayed dBUG preserves the registers by storing a copy of the register set in a buffer The RD command displays register values from the register buffer Examples To display only the program counter rd pc To display all the registers and their values the command is rd Here is an example of the output from this command PC 00000000 SR 2000 t Sm 000 xnzvc An 00000000 00000000 00000000 00000000 00000000 00000000 00000000 01000000 Dn 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 RM Register Modify 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 Example To change program counter to contain the value 0 2000 8000 the command is rm pc 20008000 33 CMM 5235 USER MANUAL V1 0 09 14 04 RESET R
19. IMERS FEC 2 WDT PITO PIT1 PIT2 PIT3 QADC GPTA GPTB RESET CCM PMM CLOCK EPORT CFM INTCO and INTC1 Refer to the MCF5235 user s manual for more information on these modules and the registers they contain Example ird csO csar IRM Internal Register Modify Usage IRM module register data This command modifies the contents of the internal registers of different modules inside the MCF5235 In the command line module refers to the module name where the register is located and register refers to the specific register to modify The data parameter specifies the new value to be written into the register The registers are organized according to the module to which they belong The available modules on the MCF5235 are SCM CS0 CS1 CS2 CS3 C84 CS5 CS6 GPIO QSPI DMAO DMA1 DMA2 DMAS3 UARTO UART1 UART2 SDRAMC TIMERO TIMER1 TIMER2 CAN 2 WDT PITO PIT1 PIT2 PIT3 QADC GPTA GPTB RESET PMM CLOCK EPORT CFM INTCO and INTC1 Refer to the MCF5235 user s manual for more information on these modules and the registers they contain Example To modify the CSAR register in the CS1 chip select module to the value 0x4000 the command is irm cs1 csar 4000 29 CMM 5235 USER MANUAL V1 0 09 14 04 HELP Help Usage HELP lt command gt The HELP command displays a brief syntax of the commands available within dBUG In addition the address of where use
20. OW Show Configurations Usage SHOW lt option gt The SHOW command displays the settings of the user configurable options within dBUG When no option is provided SHOW displays all options and values Examples To display the current baud rate of the board the command is show baud To display all options and settings the command is show Here is an example of the output from a show command dBUG gt show base 16 baud 19200 server 192 0 0 1 client 192 0 0 2 gateway 0 0 0 0 netmask 255 255 255 0 filename test srec filetype S Record ethaddr 00 CF 52 49 C3 01 STEP Step Over Usage STEP The STEP command can be used to step over a subroutine call rather than tracing every instruction in the subroutine The ST command sets a temporary software breakpoint one instruction beyond the current program counter and then executes the target code The STEP command can be used to step over BSR and JSR instructions 35 CMM 5235 USER MANUAL V1 0 09 14 04 The STEP command will work for other instructions as well but note that if the STEP command is used with an instruction that will not return i e BRA then the temporary breakpoint may never be encountered and dBUG may never regain control Examples To pass over a subroutine call the command is step SYMBOL Symbol Name Management Usage SYMBOL lt symb gt lt symb value lt r symb gt lt c l s gt The SYMBOL command adds or remov
21. U operating state for user examination After application of the ABORT switch dBUG will prompt the current program instruction pending Display is similar to a breakpoint operation CMM 5235 USER MANUAL V1 0 09 14 04 SYSTEM CLOCK The reference oscillator is 25MHz crystal MCF5235 clock is generated by the internal PLL from the reference frequency for operation up to 150Mhz CMM 5235 BCC operation is rated at 100Mhz but higher speed operation is possible User applications can change the clock setting under software control Caution should be applied so that communication with the dBUG monitor is not lost due to clock frequency and serial baud rate change MEMORY Memory is provided in the MCF5235 device and externally on the development board The MCF5235 provides 64K bytes of SRAM memory internally Board memory consists of 16M Bytes of SDRAM and 2M bytes of Flash memory standard The debug monitor occupies the first or lower 256K bytes of the board Flash memory User should refer to the dBUG memory map for default memory allocation and physical locations Memory Devices SDRAM 2 x Micron MT48LC4M16A2 or same for 32 bit wide SDRAM bank of 16M bytes SDRAM controller is dedicated to this interface Optional upgrade to 32M byte bank is possible with 2 x MT48LC8M16 devices installed contact factory for special configurations FLASH 1 x AMD AM29LV160B or same for 16 bit wide flash bank of 2M bytes 50 chip select is dedicated
22. al The channel transmit and receive signals provided on the UART1 RXD1 and TXD1 signal pins from the MCF5235 are connected to a 3 3V CAN transceiver capable of 1M baud communication SN65HVD230 Transceiver differential CAN network signals CAN and CAN LO are provided a 62 ohm termination and applied to the MCU PORT connector pins 49 and 50 respectfully 10 CMM 5235 USER MANUAL V1 0 09 14 04 The CAN transceiver has CAN signal drive control via the RS test pad on the development board The RS signal is provided a 1K Ohm pull down resistor for the maximum signal rate setting User may refer to the SN65HVD230 data sheet and apply additional signal control at the RS test pad The port connector accepts standard 1 inch space 025 square pin socket connectors UTXD1 and CANRXO URXD1 signals can be isolated by CT1 and cut away options for user application applied via the MCU Port J1 ETHERNET Port J1 provides the Ethernet physical interface connection Port configuration applies a Micrel KS8721BL 10 100T physical layer transceiver PHY to the MCF5235 Fast Ethernet Controller FEC MAC for a complete IEEE802 3 interface Features of the port include Auto MDX cable or connection configuration type detection 4 status indicators and an integrated transformer RJ45 connector The JP2 interrupt option can be applied by the user for PHY status interrupt services via IRQ6 in the MCF5235 Refer to the KS8121 d
23. ata sheet for register and operation details Ethernet Status Indicators LNK Green Ethernet has Link ON with Network connected 100 Green Ethernet is operating 100 base ON if 100 base network OFF if 10 base network DUP Green Ethernet is operating full duplex ON if full duplex network COL RED Ethernet is experiencing packet collisions OFF unless network has a problem Note Ethernet port must be initialized and operating for status indications Refer to the CMM5235 SCH C pdf drawing for details on hardware connections to this port BDM PORT The BDM PORT provides a standard Coldfire BDM JTAG development port The BDM EN option provides for the development port mode selection between BDM or JTAG Host Development Cable Installation Pin 1 CMM 5235 board BDM Port 11 CMM 5235 USER MANUAL V1 0 BDM JTAG Port Connection GND GND RESET 3 3V GND PST2 PSTO DDATA2 DDATAO GND 41 5V MCU PORT 09 14 04 The MCU PORT provides access to the MCF5235 I O ports SCL LTPU RESET 15120 15121 CS6 CS4 CS2 DTIN3 DTIN2 DTIN1 DTINO UTXD2 CANTX1 UCTS1 Note 1 UTXDO Note 1 CANRXO URXD1 QSPICS1 QSPICLK QSPIDOUT IRQ6 IRQ4 IRQ2 GND CAN_HI CS1 DTOUTS DTOUT2 DTOUT1 DTOUTO URXD2 CANRX1 URTS1 URXDO Note 1 CANTXO UTXD1 Note 1 QSPICSO QSPIDIN IRQ7 IRQ5 IRQ1 3 3V CAN_LO Note
24. char void asm move 0x0010 d0 select the function asm trap 15 make the call asm move l 01 00 put the character in dO 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 move 0014 d0 Select the function trap 15 Make the call dO contains the response yes no C example int board_char_present void asm move 0x0014 d0 select the function 39 CMM 5235 USER MANUAL V1 0 09 14 04 asm trap 15 make the call EXIT TO dBUG This function function code 0x0000 transfers the control back to the dBUG by terminating the user code The register contents are preserved Assembly example 0000 d0 Select the function trap 15 Make the call exit to dBUG C example void board_exit_to_dbug void asm move 0x0000 d0 select the function asm trap 15 exit and transfer to dBUG 40
25. cified the default of word sized data is used 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 0x0040_0000 the command is md 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 0 0005 0000 the command is md b 40000 50000 To display a range of 32 bit values starting at 0 0004 0000 and ending at 0x0005 0000 md 40000 50000 MM Memory Modify Usage MM lt width gt addr lt data gt The MM command modifies memory at the address addr The value for addr may be an absolute address specified as a hexadecimal value or a symbol name Width specifies the size of the data that is modified If no lt width gt is specified the default of word sized data is used 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 immediate
26. 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 C function main symbol _main see symbol command 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 all breakpoints the command is br r BS Block Search 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 If no width is specified the default of word sized data is used The values for addresses begin and end may be absolute addresses specified as hexadecimal values or symbol names The valu
27. e Internet Protocol address for the computer client IP e address of the Gateway for non local traffic gateway e Network netmask for flagging traffic as local or non local netmask In addition the dBUG network download command requires the following three parameters address of the TFTP server server Name of the file to download filename e Type of the file to download file type 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 18 CMM 5235 USER MANUAL V1 0 09 14 04 Client IP 2 V IPaddress of the board Server IP IP address of the TFTP server Gateway IP address of the gateway Netmask Network netmask Configuring dBUG Network Parameters Once the network parameters are known the dBUG Monitor must be configured The following commands are used to configure the network parameters set client client IP set server server IP set gateway gateway IP set netmask netmask set mac lt addr gt For an example the TFTP server has IP address of 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 MAC address is chosen arbitrarily and is unique The commands to dBUG are
28. e 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 23 CMM 5235 USER MANUAL V1 0 09 14 04 Examples To search for the 32 bit value 0x1234 5678 in the memory block starting at 4 0000 and ending at 0 7 0000 bs 40000 70000 12345678 This reads the 32 bit word located at 0 0004 0000 and compares it against the 32 bit value 0x1234 5678 If no match is found then the address is incremented to 0x0004 0004 and the next 32 bit value is read and compared To search for the 16 bit value 0x1234 in the memory block starting at 0 0004 0000 and ending at 0x0007 0000 bs 40000 70000 1234 This reads the 16 bit word located at Ox4 0000 and compares it against the 16 bit value 0 0000 1234 If no match is found then the address is incremented to 0x0004 0002 and the next 16 bit value is read and compared DC Data Conversion Usage DC data The DC command displays the hexadecimal or decimal value data in hexadecimal binary and decimal notation The value for data may be a symbol name or an absolute value If an absolute value passed into the DC command is prefixed by Ox then data is interpreted as a hexadecimal value Otherwise data is i
29. er this rate can be changed by the user with a set command 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 dBUG 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 is not case sensitive Commands may be entered either in upper or lower case depending upon the users equipment and preference Only symbol names require that the exact case be used See the dBUG Ethernet Support section in this manual for details on operating this port dBUG 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 MCF5235 clock is initialized to 100 MHz The instruction cache is invalidated and disabled The Software Watchdog Timer is disabled and internal timers are placed in a stop condition dBUG memory map is configured Interrupt Service Support Interrupt controller register is initialized with unique interrupt level priority pairs Please refer to the dBUG source files on the ColdFire support CD for the complete initialization code sequence 15 CMM 5235 USER MANUAL V1 0 for more details on applying interrupts dBUG Memory Map 0x40000000
30. es 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 a option adds a symbol name and its value into the symbol table r option removes a symbol name from the table C option clears the entire symbol table option lists the contents of the symbol table 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 Symbols can also be added to the symbol table via in line assembly labels and Ethernet downloads of ELF formatted files Examples To define the symbol main to have the value 0 0004 0000 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 s To display the symbol table the command is symbol 36 CMM 5235 USER MANUAL V1 0 09 14 04 TRACE Trace Into 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 regi
31. esesececeecceeseuaaeceecceceeeasececececsesaaeeesececeeseaseseseesceesesaaeeeeeceesensaaeaes 29 IRM INTERNAL REGISTER MODIPY scssccccccecsessssscecececeessnsececeeccecseuauececececseeeaeeecececseeaaesecececeenesaeaeseesceeseneaeeeeeceesensaaeees 29 IBID 30 IER S3IBOOPREAD JA RIED RO EUREN EN EIN I E NEQUIT ONSE 30 EW LOOP duy 30 MDs MEMORY D SP A ER eve T a EUR 31 MM MEMORY MODIBY 5 Tee 31 MMAP MEMORY MAP DISPE AY eerte e ERE Ee E ARR PEE EUR RE NER Have 32 RD REGISTER DISPLAY cc aite areis ere te ERE ERE nete ES ORI 33 RM REGISTER MODIEY eren edes b ite e eg arn EE 33 RESET RESET THE BOARD AND 34 SET SEPGONFIGURATIONS e eroi erat E me qtue deett ES 34 SHOW SHOW CONFIGURATIONS ccsssscccccceceesesececccecsensaececececsensseaecececeesesaaeseeccecsesnaaeeeeececeesesaesecececeesesasaeceesceesenssaeeeeeees 35 STEP STEPOVER 5 nec a tei n daa eed i gi 35 SYMBOL SYMBOL NAME MANAGEMENT ssssscssccecsessssececececeeseseeeccecceeseneaeseeccecsessaaeceeececeesusascecececeeneaaeceseesceeeeasaeseeeees 36 TRACE TRACE INEO iere aemper e anter iei i EAM 37 UP UPLOADNEEDWORK namens 37 VERSION DISPLAY DBUG VERSION
32. eset the Board and dBUG Usage RESET The RESET command resets the board and dBUG to their initial power on states The RESET command executes the same sequence of code that occurs at power on If the RESET command fails to reset the board properly cycle the power or press the RESET button Examples To reset the board and clear the dBUG data structures the command is reset SET Set Configurations Usage SET lt option value gt The SET command allows the setting of user configurable options within dBUG With no arguments SET displays the options and values available The SHOW command displays the settings in the appropriate format Note that some configuration items will not take effect until a Reset has occurred The standard set of options is listed below baud This is the baud rate for the first serial port on the board All communications between dBUG and the user occur using 19200 bps eight data bits no parity and one stop bit 8N1 with no flow control base This is the default radix for use in converting a number from its 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 Th
33. is 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 default filename to be used for network download if no name is provided to the DN command 34 CMM 5235 USER MANUAL V1 0 09 14 04 filetype This is the default file type to be used for network download if no type is provided to the DN command Valid values are coff and elf mac This is the Ethernet Media Access Control MAC address a k a hardware address for the evaluation board This should be set to a unique value and the most significant nibble should always be even Examples To set the baud rate of the board to be 38400 the command is set baud 38400 NOTE See the SHOW command for a display containing the correct formatting of these options See the dBUG Ethernet support for additional details on network settings SH
34. ly sets the contents of addr to data 31 CMM 5235 USER MANUAL V1 0 09 14 04 If no value for data is provided then the MM command enters into a loop The loop obtains 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 for instance 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 0 0001 0000 to be OxFF the command is mm b 10000 FF To interactively modify memory beginning at 0x0001 0000 the command is mm 10000 MMAP Memory Map Display Usage mmap This command displays the memory map information for the evaluation board The information displayed includes the type of memory the start and end address of the memory and the port size of the memory The display also includes information on how the Chip selects are used on the board Here is an example of the output from this command Type Start End Port size SDRAM 0x00000000 0x003FFFFF 32 bit SRAM int 0x20000000 0x2000FFFF 32 bit ISPBAR 0x40000000 Ox7FFFFFFF 32 bit FLASH ext OxFFE00000 OxFFFFFFFF 16 bit Protected Start End dBUG code OxFFE00000 OxFFE3FFFF dBUG data 0x00000400 0x0001F
35. mbled fully functional development board for the Freescale MCF5235 microcontroller Provided with wall plug power supply Ethernet cable and serial cable Provided support software for this development board is for Windows 95 98 NT 2000 XP operating systems Development board users should also be familiar with the hardware and software operation of the target MCF5235 device refer to the provided Freescale User Guide for the device and the Coldfire Reference Manual for details The development board purpose is to assist the user in quickly developing an application with a known working environment to provide an evaluation platform or as a control module for an applied system Users should be familiar with memory mapping memory types and embedded software design for the quickest successful application development Software Development Application development maybe performed by applying the dBUG firmware monitor or by applying a compatible Coldfire BDM JTAG cable with supporting host software The monitor provides an effective and low cost command line debug method Software development is best performed with a development tool connected to the BDM port This provides real time access to all hardware peripherals and memory on the board Development tool software also provides high level C C source code debug environment The target development environment and procedure for best success is to place software to be tested into RAM memory
36. mbol tables are extracted from the file during download and used by dBUG Only global symbols are 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 26 CMM 5235 USER MANUAL V1 0 09 14 04 dn S srec out To download a COFF file with the name coff out the command is dn coff out To download a file using the default file type with the name bench out the command is dn bench out To download a file using the default filename and file type the command is dn FL Flash Load or Erase Usage FL command dest src size The FL command is used to erase and write the external flash memory and display flash device sector information Erase or write operations must be performed in even sector block sizes The write command will erase all of the associated flash sectors prior to writing If the write destination address or byte count range does not provide an even sector boundary dBUG will prompt the user to continue External flash destination address FFF40000 FFFFFFFE must be word aligned 2 byte and the byte count must be in word 2 byte or even number multiples To download S record files directly
37. nd 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 are OUT CHAR IN CHAR CHAR PRESENT and EXIT TO dBUG OUT CHAR This function function code 0x0013 sends a character which is in lower 8 bits of D1 to terminal Assembly example assume d1 contains the character move 0013 d0 Selects the function TRAP 15 The character in d1 is sent to terminal C example void board_out_char int ch f your C compiler produces a LINK UNLK pair for this routine then use the following code which takes this into account Hif LINK a6 0 produced by C compiler asm move 8 a6 d1 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 If C compiler does not produce a LINK UNLK pair the use the following code asm move l 4 sp d1 put ch into d1 38 CMM 5235 USER MANUAL V1 0 09 14 04 asm move l 0x0013 d0 select the function asm trap 15 make the call endif IN CHAR This function function code 0x0010 returns an input character from terminal to the caller The returned character is in D1 Assembly example move 0010 d0 Select the function trap 15 Make the call the input character is in d1 C example int board_in_
38. nload address for validity If the destination is an address outside the defined user space then an error message is displayed and downloading aborted If the destination address is in the user flash memory space the flash will be programmed but not erased See the FL command for flash erasing 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 di To download an S record file through the serial port and add an offset to the destination address of 0x40000 the command is 0 40000 25 CMM 5235 USER MANUAL V1 0 09 14 04 After the DL command is invoked the user should select file transfer or upload and send the S record file form the host The host serial terminal software should apply XON XOFF flow control to the transfer if the target memory is Flash space to allow flash programming time delays Alternate method is to download with an offset into SDRAM memory space and then apply the FL command to program the flash memory space DLDBUG Download dBUG update Usage didbug The dldbug command is used to update the dBUG image in Flash memory When updates to the MCF5235 dBUG are available the update S record may be downloaded into the flash from the console or serial port similar to the DL command The user is prompted for verification before performing the operation note case sensiti
39. nterpreted as a decimal value All values are treated as 32 bit quantities Examples To display the decimal and binary equivalent of 0x1234 the command is dc 0x1234 To display the hexadecimal and binary equivalent of 1234 the command is dc 1234 DI Disassemble Usage DI lt addr gt The DI command disassembles target code pointed to by addr The value for addr may be an absolute address specified as a hexadecimal value or a symbol name 24 CMM 5235 USER MANUAL V1 0 09 14 04 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 The DI command is repeatable Examples To disassemble code that starts at 0 0004 0000 the command is di 40000 To disassemble code of the C function main the command is di main DL Download Console Usage DL lt offset gt The DL command performs an S record download of data obtained from the console or 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 dow
40. odule application board DB9 serial cable Ethernet cable 3 party Demo Software Freescale dBUG monitor and GNU Software Tool Package that includes C compiler and source level debug utilities The BDM port is compatible with standard Coldfire BDM JTAG Low voltage development cables The installed monitor software allows easy application debugging and development Features e 5235 CPU 64K Byte Ram chip COBRE eset SS 8K Byte Cache Ram on chip T 8 8 oo 16 Channel ETPU module oon viti D COE B bus 5 5 B B Interrupt Controller oozez QSPI and 2 CAN Serial Ports SEEN 1 a aso ae P vnd M DMA capability 2r z ge Interrupt Po 548 BDM JTAG Port 22 2 3 3 1 5V operation Up to 150Mhz operation 5 2 2M Byte Flash 16 bit external moo 16M Bytes SDRAM 32 bit external 25Mhz reference crystal up to 100Mhz operation E rs MCU Port 50 pin GPIO port w 1 x 1Mb C
41. pointer actually refers to general purpose address register seven A7 The commands DI GO MD STEP and TRACE are used repeatedly when debugging dBUG recognizes this and allows for repeated execution of these commands with minimal typing After a command is entered simply press RETURN or ENTER to invoke the command again The command is executed as if no command line parameters were provided User programs are provided access to various dBUG routines by the Trap 15 Functions These functions are discussed at the end of this chapter dBUG Ethernet Support Ethernet support by the dBUG monitor is limited to TFTP Trivial File Transfer Protocol downloads of object code files Note that this operation requires an Ethernet TFTP server to be running on the host usually a PC attached to the development board The support CD provides simple TFTP host software TFTPD32 for a Windows based PC if needed Prior to using this feature several parameters must be configured for network downloads to occur The information that is required and the steps for configuring dBUG are described below Required Network Parameters To perform network downloads dBUG needs 7 parameters of which 5 are network related and 2 are download related The parameters are listed below with the dBUG designation following in parenthesis All computers connected to an Ethernet network running the IP protocol need 4 network specific parameters These parameters are
42. port is also required for this option CMM 5235 USER MANUAL V1 0 09 14 04 CMM 5235 PORTS AND CONNECTORS PWR Power Jack PWR provides the default power input to the board The power jack accepts a standard 2 0 2 1mm center barrel plug connector positive voltage center to provide the VIN supply of 5 to 30 VDC 9VDC typical Volts 2mm center COM Port The COM port provides a 10 pin ribbon connection for a standard socket type 9 pin serial connector The port provides RS232 type interface to the MCF5235 UARTO peripheral The COM port is applied by the dBUG monitor at 19 2K baud default Following is the connection reference 1 9 1 1 2 DB9 6 The port is a DB9 socket connector with RS232 DB9 2 TXD 3 4 CTS DB9 7 signal levels DB9 3 RXD 5 6 RTSDB9 8 CTS RTS are enabled by options RTS and CTS to DB9 4 7 8 DB9 9 MCF5235 signals RTSO and CTSO respectfully for DB9 5 GND 9 10 UARTO hardware flow control 1 4 6 connected for status null to host The 1 4 6 and 9 pins provide RS232 status signals RTS and CTS OPTION PADS Apply 0805 SMT size 0 ohm resistors or wire ties across the option pads to enable MCF5235 RTSO output and CTSO input signals for hardware flow control operation on the COM1 port These signals should also be enabled in UARTO by the user application CAN Port The CAN port provides the physical interface layer for the MCF5235 FlexCAN Controller Area Network version 2 0B peripher
43. r Modify LR Ir lt width gt addr Loop Read LW lw width addr data Loop Write MD md lt width gt lt begin gt lt end gt Memory Display MM mm lt width gt addr lt data gt Memory Modify MMAP mmap Memory Map Display RD rd reg Register Display core RM rm reg data Register Modify core RESET reset Reset SD sd Stack Display contents SET set option value gt Set Configurations SHOW show option Show Configurations STEP step Step Over SYM symbol lt symb gt lt symb value lt symb gt Symbol Management C s gt TRACE trace lt num gt Trace Into UP up begin end filename Upload binary data VER version Show dBUG Version 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 e B 8 bit byte access W 16 bit word access 17 e 32 bit long access CMM 5235 USER MANUAL V1 0 09 14 04 When lt width gt option is provided the default width is W 16 bit The core ColdFire register set is maintained by dBUG These are listed below A0 A7 DO D7 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 inoperable A reference to SP stack
44. r 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 To obtain help on the breakpoint command the command is help br LR Loop Read Usage LR lt width gt addr The LR command continually reads the data at addr until a key is pressed The optional lt width gt specifies the size of the data to be read If no lt width gt is specified the command defaults to reading word sized data Example To continually read the word data from address OxFFF2_0000 the command is Ir FFF20000 LW Loop Write Usage LW width addr data The LW command continually writes data to addr The optional width specifies the size of the access to memory The default access size is a word Examples To continually write the data 0 1234 5678 to address 0x0002 0000 the command is 20000 12345678 Note that the following command writes 0x78 into memory Iw b 20000 78 30 CMM 5235 USER MANUAL V1 0 09 14 04 MD Memory Display 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 values for addresses begin and end may be absolute addresses specified as hexadecimal values or symbol names Width modifies the size of the data that is displayed If no lt width gt is spe
45. sembled and if valid placed into memory otherwise an error message is produced Examples To place a NOP instruction at address 0x0001_ 0000 the command is asm 10000 nop To interactively assembly memory at address 0x0040 0000 the command is asm 400000 20 CMM 5235 USER MANUAL V1 0 09 14 04 BC Block Compare Usage BC addr1 addr2 length The BC command compares two contiguous blocks of memory on a byte by byte basis The first block starts at address and the second starts at address addr2 both of length bytes If the blocks are not identical the address of the first mismatch is displayed The value for addresses addr1 and addr2 may be an absolute address specified as a hexadecimal value or a symbol name The value for length may be a symbol name or a number converted according to the user defined radix hexadecimal by default Example To verify that the data starting at 20000 and ending at 0x3_0000 is identical to the data starting at 0 8 0000 the command is bc 20000 80000 10000 BF Block Fill Usage BF width begin end data inc 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 If no width is specified the default of word sized data is used The value for addresses begin and end may be an absolute address specified as a hexadecimal value or a symbol name
46. sters to achieve single instruction execution and the target code executed Control returns to dBUG after a single instruction execution of the target code This command is repeatable 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 UP Upload network Usage UP begin end filename The UP command transfers binary data stored in memory on the development board to the host via the network connection The transfer applies the same network settings as the DN command but provides the new file name on the host Examples To send memory data from 0x00020000 to 0x0002FFFF as file name test bin to the network host the command is up 20000 2FFFF test bin VERSION Display dBUG Version Usage VERSION The VERSION command displays the version information for dBUG The dBUG version build number and build date are all given The version number is separated by a decimal for example v 2b 1c 1a The version date is the day and time at which the entire dBUG monitor was compiled and built Examples 37 CMM 5235 USER MANUAL V1 0 09 14 04 To display the version of the dBUG monitor the command is ver TRAP 415 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 perform a special task a
47. tensosssseiacssedes 10 PWR POWERJACK were IRI RA NEGET NN INI IG NIME ANM 10 COM NO UE DM 10 CAN PORT ene Ren eee 10 KIEEFHERNETPORT ete denter eM Mitt DUE 11 Be Seb aedes a a tas RS ns Bak ees ARR eS 11 MGUZPORT 2e enun iei ue ul RCE d 12 io O ee E 13 ETXPUSPORD2 3 AA Ate 13 TROUBLESHOOTING o 14 DBUG MONITOR 15 DBUG COMMUNICATION P 15 DBUG SYSTEM INITIALIZATION 222220 10 lt n n n n nen nnn nnn n n n e e a a hu usn n unu a 15 Interrupt Service Supports ade Aa NR e e eg ete ee eg etiaai As 15 DBUG MEMORYMMAP eter me eau eiusd esee ee ee c ee 16 DBUG COMMANDS erected uda eee esteem ert eR 17 dBUGsCGommand Table iui Nee ettet has oak es ata tube ere 17 DBUG ETHERNET SUPPORT meia bem Moan Grane heat etiem a uer 18 Configuring dBUG Network Parameters 19 APPENDIX 1 DBUG COMMAND SET 20 ASMAXSSEMBEBRU M
48. this option jumper removes the dBUG firmware and lower half of the flash memory device from the MCF5235 memory map This allows a user application to be started at RESET instead of the monitor for dedicated application operation To recover the dBUG monitor the DB option is installed and BCC board RESET Applications developed with BDM or JTAG tool support do not need the dBUG monitor to be resident In this case the DB EN option should remain installed so the user has access to all of the flash memory space Procedure to load user application for dedicated operation from RESET 1 Compile and link application code to be located at the flash base address OXFFEO00000 2 With DB EN option installed apply the dBUG monitor command FL erase FFF00000 100000 This will erase the top half of the flash memory 3 Load the application program with the dBUG monitor command DL 100000 Then send the application program S record to the board with the terminal software upload operation Make sure the XON XOFF flow controls are enabled or errors may occur 4 Remove or idle the DB EN option jumper and apply RESET to launch the application If the application program is functional it will operate at this time 5 to recover the dBUG monitor install the DB EN option on both pins and apply RESET dBUG should prompt on the serial port JP2 This option enables the U7 Ethernet PHY device interrupt on the MCF5235 IRQ6 interrupt Note that software sup
49. to this memory bank Optional flash bank sizes from 256K to 8M bytes is possible Contact factory for special configurations Note The MCF5235 SDRAM controller must be configured prior to application of the memory space when BDM or JTAG tools are applied COMMUNICATION PERIPHERALS The CMM 5235 provides conditioned communication ports 10 100T Ethernet RS232 Serial COM and CAN User should refer to the respective manual chapter for details of operation and connection of each port OPTION JUMPERS Option jumpers are provided for the most common user required selections Option summary OPTION OPERATION DEFAULT Position DB EN Enable the dBUG monitor in flash Installed memory BDM EN Enable BDM mode on the development Idle must be installed to port apply BDM cable JP2 Enable Ethernet PHY interrupt on IRQ6 Idle Open CMM 5235 USER MANUAL V1 0 09 14 04 BDM EN The BDM EN option must be installed to operate the PE Coldfire cable or similar BDM type development cable Option open will place the development port in JTAG mode for JTAG compatible cables INSTALLED BDM PORT is BDM Mode Development mode OPEN BDM PORT is in JTAG Mode Development mode JTAG DB EN Option allows dBUG firmware to remain resident in the external flash while a dedicated user application operates from RESET Jumper operation will enable or disable the dBUG monitor portion of the flash memory Opening
50. vity here XON XOFF serial flow control must be applied when loading the new S record Use this command with extreme caution as any error can render dBUG useless DN Download Network Usage DN lt gt lt gt lt gt s lt offset filename The DN command downloads code from the network The DN command will handle files that are S record COFF ELF or Image formats The DN command uses Trivial File Transfer Protocol TFTP to transfer files from a network host In general the type of file to be downloaded and the name of the file must be specified to the DN command The c option indicates a COFF download the e option indicates an ELF download the 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 an 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 file type will be used Default filename and file type parameters are manipulated using the SET and SHOW commands The DN command checks the destination download address for validity If the destination is an address outside the defined user space then an error message is displayed and downloading aborted For ELF and COFF files that contain symbolic debug information the sy
51. wer supply between a wall outlet and the PWR Jack on the board The board voltage indicators should turn on at this time 5 Observe the AxIDE or HyperTerminal window display for the dBUG monitor prompt prompt should be similar to the following Hard Reset DRAM Size 16M Copyright 1995 2003 Freescale Inc Rights Reserved ColdFire MCF5235 BCC Firmware v2e la xx Build XXX on XXX XX 20XXxx xx xx Enter help for help dBUG gt 6 The board is ready to use now See the dBUG monitor manual for additional monitor information If BDM JTAG development port interfaced tools are to be applied see the BDM PORT section of this manual for more details on installation CMM 5235 Hardware Configuration and Options The CMM 5235 board provides a basic development or evaluation platform for the MCF5235 microcontroller Operating mode of the MCF5235 is set at RESET for Master Mode 32 bit bus 16 bit boot device flash crystal oscillator Following are descriptions of the main components and options provided on the board CMM 5235 USER MANUAL V1 0 09 14 04 POWER SUPPLY Input power is applied by external connection to the PWR power jack The input supply is provided to the main 3 3V regulator VR1 VR2 provides 1 5V from the 3 3V supply for the MCF5235 core voltage Ethernet PHY device U7 generates its own 2 5V operating voltage from the 3 3V supply With 5 to 30VDC applied at the PWR jack the 3 3V indicator should be ON RESET
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