Rita-51J User`s Guide
Contents
1. else EAX 0 monitor in FLASH ROM high segment MA15 A15 MRDX RDX amp PSENX when RRMMODE then MA16 PSENX activate monitor when reading code memory ROMSELX PSENX RAMSELX RDX amp WRX else RROS mode MA16 A15 FLASH high seg when ROMSELX ROMSELX A15 RAMSELX A15 Rigel Corporation 2003 23 www rigelcorp com Rita51 J User s Manual else RUNMODE EAX 0 all code is external FDOO FDFF NETSELX PSENX amp A15 amp A14 amp A13 amp A12 amp All NETSELX 1 FEO0 FEFF XIOSELX PSENX amp A15 amp A14 amp A13 amp A12 amp All when RIMMODE then MA15 A15 MA16 0 use only low segments ROMSELX PSENX program FLASH ROM RAMSELX RDX amp WRX XIOSELX NETSELX MRDX RDX amp PSENX MWRX WRX else MRDX RDX amp PSENX MWRX WRX when RRMMODE then RAMSELX 0 code in RAM low segment RAMSELX PSENX amp XIOSELX amp NETSELX ROMSELX 1 MA15 A15 MA16 PSENX code in low segment else lower 32K of overlapped similar to the PRGMODE ROMSEL ROMSELX RAMSELX MA15 Rigel Corporation 2003 X A15 A15 4 Al5 TALS Tj x XIOSE CODE X but wi2. ELX swap 32K banks 24 amp A10 amp amp A10 amp DATA in FLASH th 32K banks swapped www rigelcorp com A9 amp A9 amp A8 A8 FD00 FDFF FEOO F EFF Rita51 J User s Manual MA16 Al5 FLASH high seg when ROMSELX end RITAJ5V1 Rigel Corporation 2003 www rigelcorp com 25 Rita51 J User s Manual 6 BILL OF MATERIALS The bill of materials given below lists all components by their reference as they appear on the board top overlay Revised July 2003 List Of Materials QUANTITY PART DESIGNATOR a Ji j56p 4 C3 2 20 i10n BP 4 5 7 9 3 2 J 100nF CR 6 1 j 220u _ C6 O ERG p p 7 2 X 8O0m X JRA2R3 9 8 1 AJ j 1000hm RS D Hh HK RE 3 10 1 49K R7 di 1 J6800hm 10Gag R4 12 2 LUR Gang J RLR8 j 13 1 Varisater fA pee 14 5 L Red LEDs D1 D4 D7 15 1 Green LED 16 1 X lBridge J D3 17 5 Push Button PB1 PB5 Slide Switch i S2 19 2 BOS i PPD 20 3 5mm Terminal Block J6 25 2 aX2 Header 2 26 1 iX3Header 311 312 27 3 iX4Header 3J4 37 38 pp go Rigel Corporation 2003 www rigelcorp com 26 Rita51 J User s Manual 20MHz 24MHz 32MHz pee NN 31 32
3. Contact Rigel Corporation if you would like to implement other configurations In the RIM and RRM modes if the Rita 51J is used with a third party software debugger the monitor must be downloaded along with the program This arrangement is convenient in supporting a wide range of third party software development tools Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 2 1 1 The RIM Architecture The RIM architecture is selected when there are no jumpers inserted into J5 The RIM architecture uses 64K of FLASH ROM memory for code and 64K of RAM for XDATA memory In the PGM mode the RIM monitor allows erasing FLASH ROM and loads the user code Connect the Rita 51 to the serial port and run the Reads51 TTY window Select a suitable Baud rate Move the slide switch to the PGM position and press RESET Then tap on the space bar a few times The RIM monitor prompt appears You may erase the FLASH ROM by typing e case sensitive Once the FLASH ROM is erased download your code into ROM by using the Reads51 Compile Download Hex File menu command Note that the RIM monitor extracts the Baud rate from the space characters received You may need to press the space bar a few times Also note that not all Baud rates are possible with a given oscillator frequency Download the utility Baud exe from the Rigel website to see which Baud rates are possible with a given oscillator freqnuency Once the code is downloaded to FLA
4. this includes but is not limited to errors in connecting the board to power or external circuitry Board Kit If you are purchasing a board kit you are assumed to have the skill and knowledge necessary to properly assemble same Please inspect all components and review accompanying instructions If instructions are unclear please return the kit unassembled for a full refund or if you prefer Rigel Corporation will send you an assembled and tested board and bill you the price difference You shall be responsible for shipping costs The foregoing shall apply only where the kit is unassembled In the event the kit is partially assembled a refund will not be available however Rigel Corporation can upon request complete assembly for a fee based on an hourly rate of 50 00 Although Rigel Corporation will replace any defective parts it shall not be responsible for malfunctions due to errors in assembly If you encounter problems with assembly please call Rigel Corporation at 352 384 3766 for advice and instruction In the event a problem cannot be resolved by telephone Rigel Corporation will perform repair work upon request at the foregoing rate of 50 00 per hour Governing Law This agreement and all rights of the respective parties shall be governed by the laws of the State of Florida Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual Table of Contents d INTRODUCTION lt lt sissies sn ses n wr de Ge CDI ee e
5. 1 3 The RROS Architecture The RROS architecture support is maintained for those who want to use the assembly language debugging features of the monitor RROS is backwardly compatible with the earlier version of Reads51 even version 1 of 1989 The RROS architecture requires an 11 0592 MHz clock oscillator It uses 32K of ROM monitor and 32K of RAM for a total of 64K of memory The CODE and XDATA memory spaces are overlapped In the PRG mode the ROM monitor occupies the lower half of memory and RAM the upper half In the RUN mode the RAM occupies the lower half and the ROM monitor the upper half This allows downloading programs into RAM and running them starting from address 0 Of course programs may be run while keeping RAM in the upper half of memory address 8000h to FFFFh The start address of the Reads51 debugger directs the program execution to the start of the user program Connect the Rita 51J to the serial port and run the Reads51 TTY window Make sure that an 11 0592 MHz clock oscillator is used Select 9600 Baud Move the slide switch to the PGM position and press RESET The RROS monitor will appear You may download your code into RAM by using the Reads51 Compile Download Hex File menu command or by switching to the Reads51 Run Debug mode 2 2 Interfacing the Rita 51J The Rita 51J has connections to Port 1 and 4 bits of Port 3 Each port may be used as either an input or an output port The 8051 ports may be operated i
6. J5 is a 2 by 5 header AUX The last position marked EA is not used in the J5 0 1 2 3 EA COTS models Inserting a jumper in these positions GND GND GND GND GND selects among the various architectures Insert a jumper in the top position 0 to select the RRM mode Insert jumpers in both the top and the next position 0 and 1 to select the RROS architecture JA is available if some of these signals are to be automatically provided by the microcontroller ports In the COTS version the signals on J4 are not used so that all ports are available for user I O 3 8 2 J7 and J8 Headers J7 and J8 are for the four user push buttons and LEDs The push buttons and LEDs are typically connected to the I O ports or external circuitry built on the prototyping area 3 8 3 J9 VO Header The I O header is a two row 20 pin header The I O header contains Port 1 and Port 3 2 to 3 5 an active low reset input GND VCC and the transmit and receive signals for the serial ports Note that two serial ports are available only when the Rigel Corporation 2003 www rigelcorp com 10 Rita51 J User s Manual Rita 51J is populated with the DS87C520 or DS89C420 microcntroller In this case ports P1 2 and P1 3 are dedicated to the second serial port and should not be accessed on J9 Individual signals of these jumpers are listed below Pin 1 may be identified as the post with the square pad on the printed circuit board 5 PL1 l6 P34 7
7. J6 The Rita 51J has a 5 volt regulator built in so you may use a 9 12 volt AC or DC wall transformer for power We recommend a 9 volt 500 mA transformer 3 3 Serial Ports P1 and P2 The CPU serial port on the Rita 51J is accessed through an RS 232 level converter in U8 The microcontroller supports transmit and receive signals P1 of the Rita 51 is a DB 9 female connector used to connect the board to an IBM compatible PC A minimal serial port is constructed with just 3 lines transmit receive and ground disregarding all hardware handshake signals A straight through modem cable should be used That is a cable connecting pin 2 of the Rita 51 to pin 2 of the host and similarly pin 3 to pin 3 and pin 5 to pin 5 The second serial port P2 on the Rita 51 is optional and only avaliable when using the DS87C520 or a similar 8051 which supports 2 serial ports The DB 9 connector P2 may be used to communicate with the PC host during programming and debugging the board If the second serial port is used insert jumpers J1 RxD1 and J2 TxD1 These jumpers connect the ports P1 2 and P1 3 to the RS 232 level converter U8 In this case ports P1 2 and P1 3 are dedicated to the second serial port and should not be used as general purpose I O Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 3 4 J3 The Ethernet Port Socket J3 accepts 10Base T signals terminating at an RJ 45 connector J3 is Rita 51J s primary means t
8. P12 8 J P35 9 PL3 10 JEEP Notes 1 The second serial port is available when the board is populated with the DS87C520 microcntroller 2 Do not use P1 2 and P1 3 if the board is populated with a DS87C520 or DS89C420 microcontroller with two serial ports 3 Pins 16 and 18 are available only if the board is populated with a DS87C520 or DS89C420 microcontroller 4 RSTIN is an active low input signal It is inverted and used as a reset input to the microcontroler and to the Ethernet driver 5 EEP is connected to the data pin of a DS2502E48 memory device with a unique MAC Ethernet address 3 8 4 J10 System Header The system bus is available on a two row 40 pin header marked J10 The pin assignments are given below The address and data lines of the microcontroller are de multiplexed The system bus facilitates interfacing the Rita 51J to external memory mapped input output devices Rigel Corporation 2003 www rigelcorp com 11 Rita51 J User s Manual Pin Signal Pin Signal 1 vec 2 not used 4 DO D7 Rigel Corporation 2003 www rigelcorp com 12 Rita51 J User s Manual 4 SOFTWARE 4 1 System Requirements All of Rigel s software products are designed to work with an IBM PC or compatible Pentium 120MHz or better running Windows 95 98 NT 2000 PE or XP The newest version of the software is always available to download off our web site www rigelcorp com We encourage yo
9. PacketPage Pointer as in the write operation The data is read from the PacketPage Data register Care must be taken to read and write both bytes in the required order see reference 4 The following code illustrates the data flow interface between the microcontroller and the CS8900A define CS8900A BASE OxFDOO input word address in r3 r2 CS8900A SetPacketPagePtr mov dptr CS8900A BASE 0x0A mov a r2 movx dptr a mov dptr CS8900A BASE 0x0B mov a x3 movx dptr a ret input word address in r3 r2 input data word in rl r0 CS8900A PutWord Rigel Corporation 2003 www rigelcorp com 39 Rita51 User s Manual lcall CS8900A SetPacketPagePtr mov dptr CS8900A_BASE 0x0C mov a rO movx dptr a mov dptr CS8900A BASE 0x0D mov a rl movx dptr a Feu input word address in r3 r2 output data word in rl r0 CS8900A GetWord lcall CS8900A SetPacketPagePtr mov dptr CS8900A BASE 0x0D movx a dptr mov rl a mov dptr CS8900A BASE 0x0C movx a dptr mov r0 a ret Rigel Corporation 2003 www rigelcorp com 40
10. SHOULD RETURN ALL ITEMS PURCHASED TO RIGEL CORPORATION PRIOR TO USE Return Policy This policy applies only when product purchased directly from Rigel Corporation If you are not satisfied with the items purchased prior to usage you may return them to Rigel Corporation within thirty 30 days of your receipt of same and receive a full refund from Rigel Corporation You will be responsible for shipping costs Please call 352 384 3766 prior to shipping Repair Policy If you encounter problems with your board or software after the 60 day warranty period please call Rigel Corporation at 352 384 3766 or email tech QGrigelcorp com for advice and instruction Rigel Corporation will test and attempt to repair any board You will be responsible for shipping costs and repair fees If you send a detailed report of the problems you encountered while operating the board Rigel Corporation will inspect and test your board to determine what the problem is free of charge Rigel Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual Corporation will then contact you with an estimated repair bill You will have the choice of having the board fixed or returned to you as is Rigel Corporation charges repair fees based on an hourly rate of 50 00 Any parts that need to be replaced will be charged as separate items Although Rigel Corporation will test and repair any board it shall not be responsible for malfunctions due to customer errors
11. buffer unused pins must be unused for the logic to fit tie to GND or VCC 3 4 5 6 25 39 Jf nodes PRGMODE node istype reg buffer RIMMODE AUXO and RRMMODE AUX1 determine the memory map ROM FLASH high segment holds the RROS monitor remove jumper RIMMODE 1 to download code to FLASH code memory data memory PRGMODE 1 internal ROM low segment PRGMODE 0 internal ROM RAM low segment insert jumper RIMMODE for the RROS or RRM mode with RRMMODE removed RAM holds both CODE and XDATA code memory data memory PRGMODE 1 ROM high segment RAM low segment PRGMODE 0 RAM low segment RAM high segment equations PRGMODE PRG PRGMODE ck RSTX EDMONX PRGMODE EDRUNX PRGMODE RSTOUT RSTX RSTOUTX RSTX Rigel Corporation 2003 www rigelcorp com 22 Rita51 J User s Manual use AUX2 so that the cpld compiler does not fuss RSTNET RSTX XSEL 1X RRMMODE XSEL 2X AUX2 XSEL 3X PA16X T when PRGMODE then MWRX WRX LE XIOSELX NETSELX 1 1 Be cr when RIMMODE then MRDX RDX EAX 1 monitor in internal code memory MA15 A15 MA16 I PA16X allow programming segment 1 MA16 0 ROMSELX 0 program FLASH ROM RAMSELX ls
12. data portion of a UDP message The function NetGetUdpMsg is provided for this purpose The function receives a pointer to a character buffer to which it copies the message The size of the message is returned by the function Note that if the UDPIN MSGRDY flag is set and the function NetGetUdpMsg returns zero it means that a UDP message with no data was received Similarly if the function is called when no UDP message is ready UDPIN MSGRDY flag zero the function simply returns zero Once the UDP message is retrieved the application may obtain information about the message by several NetApi51 functions Of course the message is now copied into internal RAM and the application may find the frame contents by inspecting the message but it is more convenient to call the provided functions NetGetUdpInSrcEthernAddress char pcSrcEther copies the sender s ether address to the character array pcSrcEther NetGetUdpInSrcIpAddress char pcSrcIP copies the sender s IP address source IP to the character array pcSrcIP NetGetUdpInSrcPort returns the source UDP port Rigel Corporation 2003 www rigelcorp com 36 Rita51 J User s Manual NetGetUdpInDestPort returns destination UDP port If the application requires other information such as IP flags or IDs it must inspect the message frame now copied into external RAM Please refer to the section titled Frame Access below for more information A 3 3 Message Transmission F
13. off when the board enters the RUN mode The green LED turns on when the board is in the RUN mode 3 7 2 User LEDs There are four LEDs by the prototyping area which are designated as User LEDs They may be connected to external circuitry byway of header J8 Typically these buttons would be attached to the microcontroller ports and used as I O for the application or perhaps used to debug your software 3 8 Headers The Rita 51 board has ten headers as summarized below Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual Header Name Function Ji RxD1 Connects second serial port receive signal to P1 2 J2 TxD1 Connects P1 3 to the second serial port transmit signal J4 Options Connects microcontroller ports P1 5 P1 6 P1 7 and P3 4 to the CPLD inputs Not used in the COTS version J5 Options CPLD options inputs J7 UI User inputs pushbuttons J8 UO User outputs LEDs J9 Ports Microcontroller ports for interfacing J10 System System signals address data and control signals for external hardware interfacing J11 VCC Regulated 5 V supply for user circuitry J12 GND Regulated power supply ground for user circuitry 3 8 1 J4 and J5 The Rita 51J uses a complex programmable logic device CPLD to determine the operating modes memory map Many different implementations are possible J4 and J5 are the J4 pts prs ie rna options headers for the CPLD
14. perform ARP and ICMP echo requests NetApi51 contains the higher level routines which are called by the application NetApi51 has two modules Module Network uses C code This is the module that may be customized for specific applications Module NetworkLow contains lower level routines many of which are written in in line assembly Rigel Corporation 2003 www rigelcorp com 34 Rita51 J User s Manual The application performs network communications by calls to NetApi51 routines NetApi51 is UDP oriented That is there are many functions in the library to support transmitting and receiving UDP messages The Rita51 family of boards uses the CA8900A network driver chip The CS8900A does not support interrupts in the 8 bit mode Thus NetApi51 routines are polling oriented A 3 1 Network Initialization void NetSetEtherAddress unsigned int u2 unsigned int ul unsigned int u0 Sets the six byte ethernet address also known as the hardware address or the IEEE address For example NetSetEtherAddress 0x0504 0x0302 0x0100 sets the ethernet address to 0x050403020100 It is customary to separate the individual bytes of the address by hyphens and write them in decimal as 5 4 3 2 1 0 void NetSetIPAddress unsigned int ul unsigned int u0 NetSetIPAddress sets the four byte logical internet protocol IP address For example NetSetIPAddress 0xC864 0x6402 sets the IP address to 0xC8646402 It is customary to separate
15. the individual bytes of the address by periods and write them in decimal Here OxCOA80040 is written as 192 168 0 64 int NetInitialize int uMode NetInitialize initializes the variables and the network driver chip The network driver chip takes about 10 milliseconds after reset to complete its internal initialization The function returns zero when initialization is completed Otherwise it returns a non zero busy code The argument determines the type of messages to be accepted The following constants are defined IM PROMISCUOUS allows all messages IM BROADCAST allows messages with broadcast ethernet address e g FF FF FF FF FF FF IM INDIVIDUAL allows messages with an ethernet destination address equal 7 to the ethernet address of this node set previously by a call to NetSetEtherAddress Any combination of the constants may be specified by combining them with the logical or operation Typically an application calls the initialization routine with its argument set to IM BROADCAST IM INDIVIDUAL Note that broadcast messages must be allowed for the node to respond to ARP messages IM PROMISCUOUS should be set to sniff all message traffic However this may overwhelm the node missing some of the messages Rigel Corporation 2003 www rigelcorp com 35 Rita51 J User s Manual A 3 2 Message Reception A few steps are involved in receiving messages First the network driver is polled to see if a message is pe
16. 33 34 38 39 40 41 42 DS2502 E48 Rigel Corporation 2003 www rigelcorp com 27 Rita51 J User s Manual 7 TOP OVERLAY 66666666 ee ee ee ee N L ee 66666666 eee oe ZN Rigel Corporation 2003 www rigelcorp com 28 Rita51 J User s Manual 8 CIRCUIT DIAGRAM Rigel Corporation 2003 www rigelcorp com 29 Rita51 J User s Manual Rigel Corporation 2003 www rigelcorp com 30 Rita51 J User s Manual 9 REFERENCES Rita 51 User s Guide Rigel Corporation www rigelcorp com 2002 CS8900A Product Data Sheet Cirrus Logic www cirrus com 2001 cs8900a 4 pdf Using the Crystal 8900A in 8 Bit Mode by James Ayres Application Note AN181 www cirrus com 2000 an181 pdf CS8900A Frequently Asked Questions Application Note AN205 www cirrus com 2001 an205 1 pdf Crystal LAN CS8900A Ethernet Controller Technical Reference Manual by Deva Bodas revised by James Ayres Application Note AN83 www cirrus com 2001 an83 3 pdf Rigel Corporation 2003 www rigelcorp com 31 Rita51 J User s Manual Appendix Rigel Corporation 2003 www rigelcorp com 32 Rita51 User s Manual A USING THE RITA 51J BOARD This appendix is subject to change at any time For the latest information software and examples please check our website often A 1 Overview The Rita51 board has all the necessary hardware to connect the 8051 microcontroller to an Ethernet network Wit
17. 8 Rita51 J User s Manual unsigned int GetCodeWord unsigned int uAddress is used by the code memory versions of the functions to read the MCS 51 code memory The argument is the address in code memory A 4 HARDWARE ISSUES A 4 1 Hardware Overview The CS8900A is connected to the microcontroller in the manner recommended by the manufacturer see references 1 and 3 The CS8900A is operated in the so called I O Mode see reference 2 and 5 The I O Mode registers of the CS8900A are memory mapped into the microcontrollers external data memory starting at address OxFDOO This address is determined by the CPLD equations of the Xilinx 95C36 Note that the CS8900A cannot generate interrupts support DMA or use an EEPROM when running in the 8 bit mode see reference 4 A 4 2 Communicating with the CS8900A Ethernet Driver The eight I O Mode registers of the CS8900A are memory mapped to the external data memory of the microcontroller starting at address OxFDOO Note that the CS8900A registers are 16 bit registers Thus the CS8900A I O Mode register space occupies the external data memory block OxFDOO to OxFDOE of the microcontroller A write operation is accomplished in two steps First the target address is written to the PacketPage Pointer register of the CS8900A Then the data is written to the PacketPage Data register of the 8900A The read operation similarly follows this two step procedure The address is written to the
18. EEN GEE ES DE DE n ER Se Ee CERE Ge EG EIFE DE 29 9 REFERENCES asusasuea Nis SWERE GER A NS DAN EER ES AR Ee SN Ee EN ER AE ERA ED RE ES AE ERA EA BE AR ee EG EE 31 A USING THE RITA 51J BOARD sss sss sss s sss RR se enne nnn sss RE EER annuum unns 33 A 1 OVERVIEW HR 33 A 2 EXPERIMENTS ii dius dup See Nee Si N ee SG CPU uaa NER NF RESP ENE 33 A 2 1 Sniff Experiments sins EE eee 33 Ads Pine Experiment ss overeend beaktande VD 34 A 2 3 RitaPorts Experiment ses hie ER AE NES Re carior ad ad bd VE ae Wi ke Pru EN 34 A 3 PROGRAMMER SE VIEW ie ES SR SG SO DE nee ee Ge ee UE 34 Al Network Initialization ER EE SE EE sus GREG N EE Ge EE De eed EG 35 Ak Message RecepLiGFi sussies SOEKE RR EE BEE GE EE RE DE MESE ES ans 36 As Message Transmission dese ER ER SEE GE ee Ee eg 37 A 3 5 Frame ACCESS EE EE EE ER EE EG 37 Aas Serial VO FUR CON wt Ee ES bed EE GR EE bb FEE eio a bedek 38 A 4 HARDWARE ISSUES cvesevedteserivigiatonbecotebbeiuietlebiseuoliaetentiamainediaats 39 ALI Hardware Overview ss ss ESE eten ER Ge DER ba EE pU NE 39 A 4 2 Communicating with the CS8900A Ethernet Driver 39 Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 1 INTRODUCTION 1 1 Overview RITA Rigel s Internet Technology Architecture is a set of hardware and software components to facilitate placing very low cost controller nodes on the Internet or a private network such as a company in
19. ENX pin 4 is A8 pin 5 is A9 pin 6 is A10 pin 7 is A11 pin 8 is A12 pin 9 is A13 pin 11 is A14 pin 12 is A15 pin 13 is RIMMODE pin 14 is RRMMODE pin 18 is AUX2 pin 19 is PA16X pin 20 is EAX pin 22 is PRG pin 24 is RSTX pin 40 is outputs ROMSELX pin 1 is RAMSELX pin 44 is MRDX pin 43 is MWRX pin 42 is RSTOUT pin 39 is RSTOUTX pin 38 is RSTNET pin 37 is NETSELX pin 36 is XIOSELX pin 35 is XSEL 1X pin 34 is XSEL 2X pin 33 is XSEL 3X pin 25 is Rigel Corporation 2003 type type type type type type type type type type type type type type type type type type type type type type type type type type type type type type com com com com com com com com com com com com com com com com com com com com com com com com com com com com com com inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu inpu Q O OO oo TOO CT CT CT x Ct cr rr EE cr ct ct ct ct cr ct ct mn OR ri utp utp utp utp GaGa G Gr GE Ch ct utpu ch ct uffe uffer ry uffe uffe uffer uffer ry H 21 www rigelcorp com Rita51 J User s Manual MA15 pin 26 istype com buffer MA16 pin 27 istype com buffer EDMONX pin 28 istype com buffer EDRUNX pin 29 istype com
20. PC when a keyword is w RitaBrowser C 1999 2001 Rigel Corporation www rigelcorp com received from a Rita node enter the case sensitive keyword and select the program to be activated Note that the parameters received from the Rita node following the keyword are passed on to the launched program as command line parameters The Ping timeout is currently not used The Port address determines the UDP part your PC uses to communicate with the Rita node Unless you are using this value in the Rita program you may click the Auto box The Rita Nodes tab in the configuration dialog lists the current nodes You may add modify or remove nodes from the list When adding new nodes you will be asked to provide a name along with the IP address and port number for the Rita Rigel Corporation 2003 www rigelcorp com 18 Rita51 J User s Manual node The name is used by the RitaBrowser to identify the node This is like a bookmark or a favorite entry in a web browser The default Rita port number is 8192 0x2000 You may change this number especially if you intend to use it to identify among various services at the Rita node Advanced Configuration You may save the list of Rita nodes to a file as a backup or to load onto another PC When loading a Rita nodes list you will be asked if you would like to append the new list to the existing one or to replace the existing list with the new list In the former case you will als
21. RE LA HA 9 Suk SOUS LEDS RA EE EE EE EE 9 CS uh ES TS 9 Cn EE N EE EE AN 9 EE SA Mic N AE EE EE RE N 10 ek EE OE N etat 10 3 8 3 J9 VO Header AA EE EUR SIE LEM EE N RE 10 3 8 4 J10 System Header SEA EER EE EE Um 11 4 SOFTWARE esse soes ns ss ee es DENN eenn ennen 13 2 System Requirements ik EED ie GE Ge Ge GE Do EE E 13 4 2 Software Installation i222 pre DO DE ee oe inte tteok 13 4 3 Reads5 I S R EE Ee EE DR AE sne 13 4 3 1 Rita 51J Start Up With Reads51 eee 13 4 3 2 Verifying that the Monitor is Loaded esse see senen nennen eneen 14 4 3 3 Downloading and Running an Assembly Program 16 4 3 4 Downloading and Running a C Program ies ee esse ee eee e RR ee RR ee 16 4 3 4 Programming On Board FLASH with Reads51 iss see ee ee ses seke ee 16 4 4 Rita 51 Utility Software En EE EE ive EG SE GE OE EG GE DE SE nende 17 4 5 iuis co PTT UU inte stom AENA ie AE wl Ii 18 4 5 1 Configuring RitaBrowser is Se EE EES EE RS DE EP berken ee REE ERE FR DS Eg 18 Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 4 5 2 Communicating With a Rita Node ss NE SEEN SEE EEN sneer banden 19 5 CPLD EQUATIONS issie ses ss se se n siu ee Fx stee deden an dend 20 6 BILL OF MATERIALS icis Eun GR SE N SE Ee D DIS MIENNE EFI EPI GE Ge de 26 7 TOP OVERLAY sissies sins iss ew es PS EE NENNEN ei we di eis ee NE NEN ENG EE eg ee ees 28 B CIRCUIT DIAGRAM so is ss ese se EE S
22. Rita 51J User s Guide Version 1 0 August 2003 RIGEL CORPORATION PO Box 90040 Gainesville Florida 32607 352 384 3766 www rigelcorp com techsupport rigelcorp com Rita51 J User s Manual Copyright C 2000 2003 by Rigel Corporation All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of Rigel Corporation The abbreviation PC used throughout this guide refers to the IBM Personal Computer or its compatibles IBM PC is a trademark of International Business Machines Inc Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual Rigel Corporation s Software License Agreement This Software License Agreement Agreement covers all software products copyrighted to Rigel Corporation including but not limited to Reads51 rLib51 RbHost RitaBrowser rP51 rFLASH rChpSim Reads166 and rFLI This Agreement is between an individual user or a single entity and Rigel Corporation It applies to all Rigel Corporation software products These Products Products includes computer software and associated electronic media or documentation online or otherwise Our software help files examples and related text files may be used without fee by students faculty and staff of academic institutions and by individuals for non commercia
23. SH ROM move the slide switch to its RUN position Press the RESET button to execute the downloaded program Note that the execution starts at address O 2 1 1 The RRM Architecture The RRM architecture is similar to the RIM architecture However both CODE and XDATA memory blocks are mapped into the RAM while the FLASH is not used The 128K RAM is partitioned into 64K of CODE memory and 64K of XDATA memory The RRM architecture is selected when there is a jumper placed in the top left position of J5 Connect the Rita 51 to the serial port and run the Reads51 TTY window Select a suitable Baud rate Move the slide switch to the PGM position and press RESET Then tap on the space bar a few times The RRM monitor prompt appears Since FLASH ROM is not used you may download your code into RAM by using the Reads51 Compile Download Hex File menu command Note that the RRM monitor extracts the Baud rate from the space characters received You may need to press the space bar a few times Also note that not all Baud rates are possible with a given oscillator frequency Download the utility Baud exe from the Rigel website to see which Baud rates are possible with a given oscillator freqnuency Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual Once the code is downloaded to RAM move the slide switch to its RUN position Press the RESET button to execute the downloaded program Note that the execution starts at address O 2
24. cation and sends a data packet expecting it to be echoed back The ping utility then reports the time it takes the echo to be received Sniff_Ether does not process the echo request IT may be used to inspect the messages received from the ping utility A 2 3 RitaPorts Experiment The experiment RitaPorts runs over UDP user datagram protocol It communicates with the PC over the ethernet connection You may use any software that is capable of sending and receiving UDP messages such as netcat The Windows application RitaBrowser is written specifically for this purpose You ay download RitaBrowser from the Rigel website www rigelcorp com It is a simple TTY like interface that sends the keystrokes out as UDP messages and displays the UDP messages received in its window With RitaBrowser you may type in commands which are sent over the ethernet connection from your PC through the network and finally to the Rita51 The responses travel from the Rita51 through the network and arrive at your PC Theses responses are displayed in the window of the RitaBrowser The simple application RitaPorts implements a menu that runs on the Rita51 The user may read the port values of the Rita51 over the network as well as set the port values A 3 PROGRAMMER S VIEW Rita51 network connectivity software is comprised of two libraries NetStack51 contains the low level routines and hardware drivers It also contains the code written in low level assembly to
25. corp com Rita51 J User s Manual to facilitate embedded TCP IP applications In addition Rita 51J contains a prototyping area 4 user s buttons and 4 indicators which make it an ideal test and development platform 1 3 Uses any 8051 in the 44 pin PLCC package 128K of SRAM 128K 5 volt FLASH ROM 1 full duplex serial port on board 2 with the DS87C520 or the DS89C420 12 general purpose digital input output bits Demultiplexed processor Address and Data lines All system signals are available on a 40 pin header DS2502E48 device to provide a unique MAC Ethernet address Prototyping area for additional circuitry Shielded RJ 45 connector with LAN and LINK indicators Prototyping area 4 Indicators and 4 User s buttons Board has built in 5 volt regulator Power supplied to the board by way of a 2 position terminal block Power on LED Operating temperature 0 to 70C extended temp available Machine screw sockets under all through hole Two layer 3 5 x 5 board Four corner mounting holes Software Overview The Rita 51J comes with four free software packages 1 3 1 Reads51 Reads51 is an Integrated Development Environment IDE to write application programs for the Rita 51 boards It contains a C compiler an assembler a linker and a chip simulator Any third party software development tools may be used for the Rita 51J Reads51 comes free with Rigel s MCS 51 hardware products Refer to the Reads51 User s Manual for more info
26. d an IP internet protocol number for the Rita51 Select this number so that it does not conflict with other hosts on the network The experiments assume the IP address of the Rita51 board to be 192 168 0 64 You may change this by modifying the source and recompiling the project Similarly the board is assigned the ether MAC media access control address 5 4 3 2 1 0 Again this may be changed in the source and recompiled A 2 1 Sniff Experiments Once the PC and the Rita51 is connected to the network you may conduct several experiments The two projects Sniff Ether and Sniff IP run the Rita51 as a sniffer Here the Rita51 listens to the message traffic on the network and Rigel Corporation 2003 www rigelcorp com 33 Rita51 J User s Manual reports the messages out its serial port Your PC s serial port connection receives these reports A 2 2 Ping Experiment The two experiments Sniff_Ether and Sniff_IP call the function NetServiceMsgs to process the incoming messages A more detailed description of this function is given is Section 3 2 below Sniff_Ether passes the argument FALSE zero to NetServiceMsgs Sniff_IP on the other hand passes a nonzero argument TRUE This instructs NetServiceMsgs to process ARP address resolution protocol and ICMP echo request reply ping messages Run Sniff_IP on the Rita51 Then from a DOS box on the PC issue the command ping 192 168 0 64 This invokes the Windows ping appli
27. e de NOD MEN EE 1 LEL eN EN ER N OE 1 1 2 Hardware OVerviQW siek KNEG EE BEE KG R EENKEER AE EG GE S Ge DE NE Ee EE ENE N 1 1 3 Software Overview ESE KERS DE SS RS EN OR EE be dac exa GER GR GEE RDUM EE RR 2 8 1 Redebl iuge EE EE EE EG ES EE RE GE EE RE RE ER EG EE DE ER RO SN GEREG Dk 2 1 3 2 Rita 51 Utility Software SESSE EK EE ED OE aU EG GE Di EE ais 2 1 543 ie 21 es EE BE ERE ia EE OE OE cuba ok aad 2 1 3 4 Example Software EE eee 3 dt Package LISE RM R 3 2 OPERATING MODES iiic si Sen ee Ge See es ee oe Gie ee ie BER De ei Gie ii ei Ge 4 2 1 Memory Architecture and Operating Mode esee 4 Zelk The RIM Architect re sesse ken R EER ES SEE OE EER GES ER RE ER OES AG EROR RS GE APRES 6 ZE The RRM AFCDIUSCDUEB iss Ee GR mnn GE RE SE RN ARE MEE EE 6 2 1 3 The RROS yeni ee Ti ss ssaEs REKE ES pA ESSE SERERE SEE KG EA AR DE SE REESE 7 Z2 Interfacing trie Rites U Lansen DEE DE ED DEE RE eg bcr Po es ie 7 3 OPERATING NOTES issues ananas EV ee De ee Ge XR ed N Ee Ee Ge NN ed ie RENNES 8 Sel e UR RE EE EN EE RE ER RE 8 3 2 J6 Power INDUC Cu Tm 8 3 3 Semal Ports Pl and P2 saa GESE ED EE EE Um xs Ee Dalton apa RR RUN 8 3 4 J3 The Ethernet Port sos ERNS EER SEE EN ER WE KG GE SE ER GER ee EE NE ee EN ER De 9 3 6 Push Buttons es SE EE SN EDE ES DE EG ES SE EE ED Ee ED EA EE EED 9 3 0 Slide SWIUCI8S suis EE DE VEE ER A KEER SEE NR Ge EG EN RE OE AE E SE SE GEEN EO SUO he 9 OER be RT x mL
28. e used to manage the on board FLASH of the Rita 51J In the Options Toolchain Target dialog select either the RROS or the RRM target Also select an available port and a suitable Baud rate i e 9600 in the Options TTY Options dialog Open the TTY window Make sure that the Rita 51J is in the PGM mode slide switch towards the red LED Press RESET and then hit the space bar The Baud rate is detected and used by the Rita 51J Rigel Corporation 2003 www rigelcorp com 16 Rita51 J User s Manual In order to erase the FLASH simply type the letter e case sensitive Once erased the FLASH may be programmed Use the Compile Download HEX menu to select a HEX file The download progress is reported in the status bar 4 4 Rita 51 Utility Software The Rita 51 Utility Software from Rigel Corporation is a Windows program It is an alternate means from the Reads51 software to manage the on board FLASH Select the COMM port and a Baud rate The Rita 51 Utility detects the Baud rate from the board The set of acceptable Baud rates depends on the crystal f Rita51 www rigelcorp com COMM1 lt te 7 _Download_ frequency Typically 9600 works with all frequencies The standard 11 0592 MHz frequency often used with 8051 microcontroller allow almost all Baud rates up to 57600 With a 24 MHz crystal the highest Baud rate is 11520 Higher frequencies do not necessarily allow higher Baud rates The crystal freq
29. f the standard TCP IP stack namely ARP ICMP IP and UDP This subset is sufficient to program the Rita 51 as an Internet or a private intranet node which communicates through UDP messages Users are encouraged to modify the circuit diagrams and example software in developing their own specific applications The source code of the user accessible systems calls as well as all examples on the distribution disk may be used or incorporated into applications by the registered buyer without any royalties fees or limitations Rigel Corporation is not responsible for the suitability or correctness of the example software Refer to warranty for additional information 1 4 Package List Your Rita 51J READS package includes the following Rita 51J populated with 128K RAM 128K FLASH PROM Software data sheets and user s guide are downloadable from the web RJ 45 Cable supplied A serial modem cable with a male DB9 connector and a 9 volt 500mA wall transformer are to be supplied by the user Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 2 OPERATING MODES 2 1 Memory Architecture and Operating Mode The memory architecture and the operating modes are determined by a complex programmable logic device CPLD Many different implementations are possible Most OEM users have their own modes programmed into the CPLD at the factory The CPLD programs may be modified in the field provided that the user has access to a Xili
30. h appropriate software the board may be used as an Internet node host A complete TCP IP implementation is beyond the scope of this document The range of capabilities depends on the limited memory and processing power of the 8 bit microcontroller However many TCP IP applications are possible Note that there are several professional TCP IP software vendors who support the 8051 architecture Refer to the website www rigelcorp com for links This document presents a few projects that may be used to verify the functionality of the Rita51 and its Ethernet connection Please note that the software is currently under development Many of the lower level functions are written in assembly and collected into the two libraries The low level source code is subject to change and is thus not yet released A 2 EXPERIMENTS You may conduct several experiments with the Rita51 These experiments assume that you connect the Rita51 to a network and that your PC is connected to the same network Note that your PC should also be connected to the Rita51 through a serial port This connection is used to download the programs into the Rita51 It is also used in the experiments for the Rita51 to report its activity If your PC is not on a network you may simply connect the Rita51 to the PC s Ethernet port with a crossover cable The two devices the PC and the Rita51 become the two and only two nodes on the network If you use an existing network you nee
31. hing must be used if all 128K of ROM and 128K of RAM are to be used Almost all professional software tools support native bank switching capabilities The Reads51 C compiler does not support bank switching Most application require less than 64K of code or data memory The following table summarizes the jumper settings for the different architectures Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual RIM RRM RROS First Jumper Removed Left position Left position Top position Second Removed Removed Left position Jumper Third Jumper Fourth Jumper Bottom Not used position In general the RRM architecture is convenient for downloading and testing programs Since code is downloaded into RAM there is no need to erase the FLASH ROM However if power is lost during operation the code in RAM will be lost The RIM architecture uses no jumpers It is intended for the case where Rita 51J is used in the embedded controller Since code is in FLASH ROM code is not lost when the board is disconnected from power However the RIM architecture may be a little inconvenient for debugging since the FLASH ROM has to be erased before a new program may be downloaded The RROS architecture is intended for the case where the Reads51 assembly level debugging is to be used Note that in the basic COTS versions of Rita 51J code memory and data memory do not overlap in the RIM architecture
32. is in effect The H command displays the following table B XXXX C XXXX XXXX D XX XX D xx nn D xx xx nn G XXXX H K L D XX XX xx nn XX Xx nn XXXX XXXX XXXx nn XXXX XXXX nn Re Re Re LD LD WU 0 sets Break point at address xxxx displays Code memory displays internal Da modifies internal Da La ram La ram fills a block of internal Data ram Go starts executing at address xxxx Help displays moni Kills removes brea down Loads Intel hex displays data on Por modifies data on Por tor commands k point file into memory E X t x to nn displays the contents of the Registers displays Special function register addresses displays Special function registers modifies Special function registers fills Special function registers displays eXternal memory modifies eXternal memory fills eXternal memory A single letter command may be followed by up to 3 parameters The parameters must be entered as hexadecimal numbers Each x above represents a hexadecimal digit characters 0 9 A F Intermediate spaces are ignored Alphabetic characters are converted to upper case The length of the command string must be 16 characters or less The command syntax is Letter address address data lt CR gt Rigel Corporation 2003 L5 www rigelcorp com Rita51 J User s Manual 4 3 3 Downloading and Running an Assembly Program Use the use the Project Open Project command to open the pro
33. ject lal xj Project File Module Compile Debug Edi View Tools Options Window Help 039 KEES LAAT dca EE 212 pen Project tok c wo AA A ek ex m AbsolutAssembly01 Factorial Pwmlsr Swi Array Hello E c TOI AsmDemos HelloLib Relativedssembly02 I T2F BlinkO1 lolnt Reverse Tut Blink02 Loops Sio51 newone String gt e eadsol 2 Files of type Project Files rpi Cancel Zi ER Ready MV4 Debug COM2 3500 Line 58 Col 1 E AbsoluteAssembly01 Assemble the program using the Compile Build command Use the Compile Toggle Mode command to switch to the Run Debug Mode Click on the Compile Run command and specify the starting address 8000 hex Again the Compile Toggle Mode command to revert back to the Build Mode 4 3 4 Downloading and Running a C Program Use the Project Open Project command to open the project Hello Compile the program and download it to the board using the Compile Build and Download command The project will be compiled and the resultant HEX code will be downloaded to the target board Press and hold the RESET button on the board While the RESET button is pressed flip the MON RUN switch to the RUN position This swaps the memory map on the board so that RAM occupies low memory The HEX code downloaded to RAM executes when you release the RESET button 4 3 4 Programming On Board FLASH with Reads51 Reads51 may b
34. l Line delay ms 10 Fort Background Color Run the Reads51 IDE by selecting Start Programs Reads51 You may also start Reads51 by double clicking on the Reads51 short cut icon if installed Specify the serial port COMM Port that is connected to the board by opening the Options TTY Options window Select the Toolchain and Target platform by selecting Options Toolchain Target and selecting Reads51 Toolchain v4 and the target RROS Open the TTY window using the menu command View TTY Window Press RESET on the embedded controller board and hit the space bar on the computer you are using observe the prompt in the TTY window 4 3 2 Verifying that the Monitor is Loaded Make sure the TTY window is active clicking the mouse inside the TTY window to activate it if necessary Then type the letter H case insensitive to verify that the monitor program is responding The H command displays the available single letter commands the monitor will recognize The READS monitors use single letter commands to execute basic functions Port configurations as well as memory inspection and modifications may be accomplished by the monitor Most of the single letter commands are followed by 4 hexadecimal digit addresses or 2 hexadecimal digit data bytes Rigel Corporation 2003 www rigelcorp com 14 Rita51 J User s Manual The list of monitor commands is displayed with the H command while the monitor program
35. l use For distribution rights and all other users including corporate use please contact Rigel Corporation PO Box 90040 Gainesville FL 32607 or e mail tech rigelcorp com Terms and Conditions of the Agreement 1 These Products are protected by copyright laws intellectual property laws and international treaties Rigel Corporation owns the title copyright and all other intellectual property rights in these Products We grant you a personal non transferable and non exclusive license to use the Products These Products are not transferred to you given away to you or sold to you Non commercial use These Products are licensed to you free of charge Commercial use You must contact Rigel Corporation to find out if a licensing fee applies before using these Products 2 You may install and use an unlimited number of copies of these Products 3 You may store copies of these Products on a storage device or a network for your own use 4 You may not reproduce and distribute these Products to other parties by electronic means or over computer or communication networks You may not transfer these Products to a third party You may not rent lease or lend these Products 5 You may not modify disassemble reverse engineer or translate these Products 6 These Products are provided by Rigel Corporation as is with all faults 7 In no event shall Rigel Corporation be liable for any damages whatsoever including without limitatio
36. n damages for loss of business profits business interruption loss of business information or other pecuniary loss arising out of the use of or inability to use the Product even if Rigel Corporation has been advised of the possibility of such damages Because some states do not allow the exclusion or limitations of consequential or incidental damages the above limitations may not apply to you Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 10 11 Rigel Corporation makes no claims as to the applicability or suitability of these Products to your particular use application or implementation Rigel Corporation reserves all rights not expressly granted to you in this Agreement If you do not abide by or violate the terms and conditions of this Agreement without prejudice to any other rights Rigel Corporation may cancel this Agreement If Rigel Corporation cancels this Agreement you must remove and destroy all copies of these Products If you acquired this Product in the United States of America this Agreement is governed by the laws of the Great State of Florida If this Product was acquired outside the United States of America all pertinent international treaties apply Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual HARDWARE WARRANTY Limited Warranty Rigel Corporation warrants for a period of sixty 60 days from your receipt that READS software RROS hardware assembled boards a
37. n the 8051 mode That is the ports contain open drain transistors with pull up resistors In this mode when used as output ports it is recommended that the ports sink current Similarly when used as input ports first write 1 s to the ports and have the external signal drive the port low External Memory mapped I O may be attached to the Rita 51J All address data and control signals for such interfacing are available on header J10 Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 3 OPERATING NOTES 3 1 Overview Rita 51J uses the 8051 family of microcontrollers in the standard 44 pin PLCC package These microcontrollers use the MCS 51 instruction set The Rita 51J uses external RAM during the development cycle Once an application program is developed it may be permanently placed in FLASH With an application specific program installed the Rita 51J may be used as an embedded controller The considerable flexibility of the Rita 51J is achieved by placing various monitor and loader programs in both internal code memory of the microcontroller and in the first segment of FLASH ROM If you would like to run the Rita 51J with a different microcontroller contact Rigel corporation to obtain a chip with these programs already installed in internal code memory The following are general guides to operating the board 3 2 J6 Power Input Power is brought to the Rita 51J board by a two position screw type terminal block
38. nd hardware unassembled components shall be free of substantial errors or defects in material and workmanship which will materially interfere with the proper operation of the items purchased If you believe such an error or defect exists please call Rigel Corporation at 352 384 3766 to see whether such error or defect may be corrected prior to returning items to Rigel Corporation Rigel Corporation will repair or replace at its sole discretion any defective items at no cost to you and the foregoing shall constitute your sole and exclusive remedy in the event of any defects in material or workmanship Although Rigel Corporation warranty covers 60 days Rigel shall not be responsible for malfunctions due to customer errors this includes but is not limited to errors in connecting the board to power or external circuitry THE LIMITED WARRANTIES SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE YOU ASSUME ALL RISKS AND LIABILITY FROM OPERATION OF ITEMS PURCHASED AND RIGEL CORPORATION SHALL IN NO EVENT BE LIABLE FOR DAMAGES CAUSED BY USE OR PERFORMANCE FOR LOSS PROFITS PERSONAL INJURY OR FOR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES RIGEL CORPORATION S LIABILITY SHALL NOT EXCEED THE COST OF REPAIR OR REPLACEMENT OF DEFECTIVE ITEMS IF THE FOREGOING LIMITATIONS ON LIABILITY ARE UNACCEPTABLE TO YOU YOU
39. nding at the network driver chip Pending messages are copied from the network driver chip to external RAM and processed Flags in external RAM are used to specify the results of polling and of the state of reception There are three primary flags E MSGRDY IPIN MSGRDY and UDPIN_MSGRDY The function NetServiceMsgs clears the UDPIN MSGRDY flag and polls the network driver E_MSGRDY is set if a raw ethernet message is pending in the local memory of the network driver chip NetServiceMsgs takes a Boolean argument If zero FALSE the function returns with the state of reception reflected in E MSGRDY If the argument is non zero TRUE the function further processes the message First it is copied from the local memory of the network driver chip to external RAM Then the two flags IPIN MSGRDY and UDPIN_MSGRDY are cleared The message is inspected If the message is an ARP message LLC 0806 it is automatically serviced If the message is an IP message LLC 0800 the flag IPIN MSGRDY is set and the message is further inspected If the message is an ICMP echo request it is automatically serviced If the message contains a UDP frame the flag UDPIN_MSGRDY is set In any case message information such as source and destination addresses message header and data length etc are written to variables stored in external RAM to be accessible to the application As stated NetApi51 is UDP oriented Typically the application is interested only in the
40. nx 9500 series JTAG programmer Contact Rigel Corporation for further information about custom operating modes The following modes refer to the COTS commercial off the shelf version of the Rita 51J board The memory architecture refers to the manner in which memory is used There are three architectures supported RIM Rigel Industrial Module architecture RRM Ram Resident Monitor architecture RROS Rom Resident Operating System architecture The Reads51 IDE allowing code to be placed in RAM or FLASH supports these architectures The memory architecture is determined by the jumper settings Each of these architectures supports two operating modes the PRG program mode and the RUN mode The mode is determined by the position of the slide switch When switching between modes move the slide switch and press the RESET push button Note that the mode is toggled when the RESET pushbutton is pressed not when the slide switch is moved More specifically the CPLD samples the state of the slide switch when a RESET event occurs Two LEDs indicate the current mode Use the PRG mode to erase and program the FLASH ROM Once the FLASH is programmed with the application code switch to the RUN mode Note that the default architectures use up to 64K of code memory and 64K of external data memory Other custom architectures may be implemented to use more memory Contact Rigel Corporation if you have a special need for a custom architecture Bank switc
41. o be notified if there are duplications or conflicts 4 5 2 Communicating With a Rita Node A list of currently known Rita nodes appears in a drop down list box Select the node you would like to communicate with and click the Connect button RitaBrowser opens a socket to communicate with the Rita node If the socket cannot be opened it usually means that you have not correctly specified your PC s IP address Once a socket is successfully opened you may type in the edit window and communicate with the Rita node Note that the communication depends on the specific program running on the Rita node Being an open architecture you are free to program the Rita node any way you wish For instance you may use restrict the node to answer only to specific IP addresses or use the port numbers to invoke different behaviors Refer to the Rita hardware and programming manuals for further information and demo programs It is recommended that a Rita node responds with a short message possibly a menu when it receives an unknown command or the question mark Rigel Corporation 2003 www rigelcorp com 19 Rita51 J User s Manual 5 CPLD EQUATIONS The CPLD eguations are given in ABEL advanced Boolean expression language Rigel Corporation 2003 www rigelcorp com 20 Rita51 J User s Manual module RITAJ5V1 Title RITAJ U5 RITAJ U5 device WRX pin 2 is RDX pin 3 is PS
42. o connct to a 10Mbit Ethernet network Note that J3 also includes the magnetics transformers needed to electrically isolate the Ethernet signals from the LAN 3 5 Push Buttons The Rita 51J has one reset button and four user buttons The reset button PB1 resets the board The four users buttons may be connected to external circuitry via header J7 Typically these buttons would be attached to the microcontroller ports and used to debug your software 3 6 Slide Switches The slide switch S1 located between the LEDs changes the operating mode of the board When the slide switch is in the Program PGM mode you may download software to the FLASH ROM The RUN position allows you to run your program from ROM The precise effect of the slide switch depends on the memory configuration referred to as the memory mode or simply as the mode selected by the jumpers The second slide switch S2 located above the pushbutton is the power switch Slide S2 to the ON position to run the board 3 7 LEDs There are six LEDs on the Rita 51J Two of the LEDs indicate the current operating mode of the board The other four LEDS may be connected to external circuitry via header U8 3 7 1 Status LEDs The two LEDs next to the slide switch are used as status indicators The LEDs light up depending on the operating mode which in turn is determined by the position of the slide switch The red LED is on while the board is in the Program PGM mode It is turned
43. rames to be transmitted are composed in external RAM The low level view of a transmit operation consists of two steps First the network driver chip is informed of a transmit request along with the size of the frame The network driver chip uses local memory to store frames to be transmitted The chip grants the request only when there is enough room in its local memory to hold the frame Then the frame is copied from external RAM to the local memory of the driver chip The driver chip transmits the message which may require waiting for the medium to be available or even retransmitting it if collision occurs The driver chip is polled to see if the frame has successfully been transmitted Again being UDP oriented NetApi51 provides a straightforward means of transmitting UDP messages The function NetSendUdpMsg takes two arguments The first is a pointer to the character buffer holding the message The second is the number of characters bytes to transmit It composes the frame computes the checksums asks the driver chip for permission to transmit copies the frame to the driver chip and finally waits for the transmission to be completed It returns an error code zero if successful non zero if there were errors in transmission Before NetSendUdpMsg is called several parameters of the UDP message must be set Namely the destination ether address and IP address and the source and destination ports The source ether and IP addresses pre
44. rmation 1 3 2 Rita 51 Utility Software The Rita 51 Utility Software from Rigel Corporation is a Windows program It is an alternate means from the Reads51 software to manage the on board FLASH 1 3 3 RitaBrowser The RitaBrowser is a simple Windows socket winsock application to send and receive UDP messages RitaHost maintains a list of RITA nodes e g Rita 51 boards You may connect to the boards and communicate with them by typing in the edit window Refer to the RitaBrowser manual for more information Rigel Corporation 2003 www rigelcorp com Rita51 J User s Manual 1 3 4 Example Software There are many example projects given with the Reads51 IDE that introduce the user to typical industrial applications of microcontrollers These applications include timers counters serial communications interrupt programming analog to digital conversion digital to analog conversion stepper motors LCDs keypads etc A detailed exposure to microcontroller programming and applications may be found in textbooks published by Rigel Press see www rigelcorp com rigelpress htm In addition preliminary code is provided to experiment with the networking capabilities of the Rita 51 board Most importantly a library of network support functions NetApi51 is provided NetApi51 functions allow the user to quickly develop network applications for the Rita 51 in C or assembly The NetApi51 functions currently support a subset o
45. slating network integers with high byte first to C integers with low byte first int n RxBuffer RxBuffer amp RX BUFFER n RxBuffer 12 get the 12 th integer bytes 24 and 25 n SwapEndian RxBuffer 12 A 3 5 Serial VO Function The serial input output functions are collected in the library xSio51 lib Its source code is available It is a generalization of the Sio51 cSio51 and csSio libraries The library contains the usual functions putc getc and peekc The functions puts and cputs transmit the strings given by their arguments The function puts assumes that the string is in external data memory while cputs assumes that the string is in code memory The same applies to the functions printf and cprintf The latter assumes the format string is in code memory while the former assumes it is in external data memory Stream support is provided by the two functions sprintf and csprintf Here the first argument is the stream character buffer into which the formatted strings are written In ether case the stream is assumed to be in external data memory it is not possible to write to the MCS 51 code memory Again sprintf assumes that the format string is in external data memory while csprintf assumes that the format string is in code memory The library contains the initialization function InitSerialPortO int nMode The function Rigel Corporation 2003 www rigelcorp com 3
46. tranet or a personal home network RITA is a flexible and extensible open architecture RITA is an outgrowth of custom Internet controllers built by Rigel Corporation for industrial OEM customers now being offered to the public as commercial off the shelf COTS units Refer to the article The RITA Philosophy at www rigelcorp com for more information about RITA 1 2 Hardware Overview Rita 51J is the newest board in Rigel Corporation s line of RITA controllers Rita 51J is a two layer board intended for Internet and intranet applications The board may be populated with a wide range of high speed 8051 microcontrollers in the 44 pin PLCC package The board uses the CS8900A to directly connect to a 10Base T network using an RJ 45 connector The MCS 51 CS8900A combination takes advantage of readily available hardware and software tools as well as the wealth of publicly available applications source code The Rita 51J has one RS 232 serial port two when populated with the DS87C520 or DS89C420 The board comes with 128K RAM and 128K 5 volt FLASH ROM The Rita 51 Utility Software used to program the FLASH ROM is free with the board The FLASH programming and erase operations can also be carried out from Reads51 Rita 51J s small size makes it suitable for OEM applications Its low cost and open architecture makes it a good choice for classroom instruction and hobbyists It contains large memory Rigel Corporation 2003 www rigel
47. u to check our web site often to keep up to date 4 2 Software Installation If you receive a CD from Rigel follow these steps Place the CD ROM in your drive Go to the Rigel Products 8051Software Reads51 Win95 nt and click on the software file you wish to install The program will then install in your system Follow the standard install directions If you download the software from www rigelcorp com click on the exe file The program will then install in your system Follow the standard install directions 4 3 Reads51 Reads51 is an Integrated Development Environment IDE used to write application programs for the Rita 51J boards It contains a C compiler an assembler a linker and a chip simulator Any third party software development tools may be used for the Rita 51J The following sections are designed to help get you started with the Reads51 and Rita 51J For detailed information about the Reads51 software refer to the Reads51 User s Manual 4 3 1 Rita 51J Start Up With Reads51 Check to make sure the slide switch is in the MON position Connect Rita 51J to the PC host via a modem cable Connect Rita 51J to a power supply The red LED should light up when power is connected Rigel Corporation 2003 www rigelcorp com 13 Rita51 J User s Manual TTY Settings x r Port f i Show available ports only s Cancel com 2 x Lance Baud rate 3500 Download Char delay ms 4
48. uency must be an even multiple of the Baud rate or at least within a few percent of the ideal value Move the slide switch on the Rita 51 to the PGM program position press the reset push button and press the space bar to see the Rita 51 monitor prompt The Rita 51 Utility has two buttons The Erase button erases the FLASH ROM The Download button asks for a program file in the Intel hex format It opens and downloads the file to the board Once you download your program move the slide switch to the RUN position and press the reset push button You code in FLASH ROM now constitutes the 8051code memory The RAM is mapped into the 8051 external data XDATA memory Rigel Corporation 2003 www rigelcorp com 17 Rita51 J User s Manual 4 5 RitaBrowser RitaBrowser monitors and controls Internet applicances built with Rigel Corporation s Rita family of control boards The Rita nodes may be on the Internet or on a private network such as a personal network or a company intranet 4 5 1 Configuring RitaBrowser Click the Configure button Use the tab This PC to specify the IP address of your computer If you are using a dial up service you can obtain the IP address by the ARP utility Open a DOS box and type arp a to see your assigned IP address If your PC is set to participate in a LAN use the Settings Control Panel Network dialog to view your IP address If you would kike to automatically launch programs on your
49. viously specified during initialization are used The following functions set the parameters of the UDP message to be transmitted NetSetUdpOutDestEthernAddress char cEther NetSetUdpOutDestIpAddress char cIP NetSetUdpOutSrcPort int nDestPort NetSetUdpOutDestPort int nSrcPort Both cEther and cIP are pointers to character arrays holding the ethernet and IP address of the destination A 3 4 Frame Access Low level frame access is available as the incoming messages are placed in a buffer This buffer referred to as the receive buffer is kept in external data memory A pointer to this memory may be declared and the buffer contents be accessed as array elements Note that the buffer is an external variable to the C Rigel Corporation 2003 www rigelcorp com 37 Rita51 J User s Manual code Similarly the external variable E MSGRDY is nonzero when an ethernet message is placed in the receive buffer Its size is stored by the external variable EIN_SIZE The following code portions illustrate the use of these variables extern int E MSGRDY EIN SIZE RX BUFFER char c RxBuffer check incoming IP messages if E MSGRDY continue A RxBuffer amp RX BUFFER c RxBuffer 12 get the 12 th byte of the message Alternatively the receive buffer elements may be accessed as two byte integers The function SwapEndian interchanges the two bytes of its integer argument It is convenient in tran
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