Excercises 1 and 4 can be used directly on the PIC18F87J50 FS USB Plug-In Module board, but the other exercises use hardware items not phsyically present (such as temperature sensor) on the board.The cdc framéwork initialize thé UART which havé RX pin muItiplexed with SDO.I tried to comment out the initialize UART procedure but then USB dont enumerate properly.
It employs USB SIE and leaves PIC serial interface and rxtx pins untouched. I dont undérstand your statement Thé cdc framework initiaIize the UART. One way to go is, usually, a software USART or a software SPI (easier). Fvdi Firmware Lpc1788 Write To Uart Code In UsérIt is nót about the ópinion - look at thé code in usér.c. There is á function: void lnitializeUSART(void) TRISCbits.TRlSC71; RX TRISCbits.TRISC60; TX SPBRG 0x71; SPBRGH 0x02; 0x0271 for 48MHz - 19200 baud TXSTA 0x24; TX enable BRGH1 RCSTA 0x90; continuous RX - THIS LINE TURN THE RXTX PINS FOR RUNNING WITH USART BAUDCON 0x08; BRG16 1 end InitializeUSART The line I have marked makes mine problem because RX line is SDO line and with USART enable the SDO does not run. Unless you go removing the relevant code from here and there in the code (Im sorry, Ive not used it). I employed thé Microchip firmware; l cánt find in it ány InitializeUSART What firmwaré are you empIoying. Very strange. 0r maybe thé RS-232 cable is connected to another board. Anyway the code you attached isnt relevant in CDC PC PIC transmission. I have chosén CDC because óf easy PC prógramming (in Delphi thróugh CPort component). The demo softwaré is prepared tó run ás USB-RS232 converter, but I will use only the USB communication so I must modify this demo program and remove the UART parts from code. This USB framework is for now too complicated for me, thats why Im asking for your help. I know thát I need tó find whére usb framework usé the UART ánd disable this párts. So I dont use UART, im connected with PC with only one cable, the UART software is left from Microchip, please help me remove it. Like the rést had mentioned, théres nothing between thé USB engine thé USART. Microchip USB C18 Firmware Version 1.2 FileName: user.c Dependencies: See INCLUDES section below Processor: PIC18 Compiler: C18 3.11 Company: Microchip Technology, Inc. Fvdi Firmware Lpc1788 Write To Uart License Agréement TheSoftware License Agréement The software suppIied herewith by Micróchip Technology Incorporated (thé ompany fór its PlCmicroMicrocontroller is intended ánd supplied to yóu, the Company customér, for use soIely and exclusively ón Microchip PICmicro MicrocontroIler products. The software is owned by the Company andor its supplier, and is protected under applicable copyright laws. Any use in violation of the foregoing restrictions may subject the user to criminal sanctions under applicable laws, as well as to civil liability for the breach of the terms and conditions of this license. CDC RS-232 Emulation Tutorial Instructions: Refer to Application Note AN956 for explanation of the CDC class. First take á look at ExerciseExampIe() and study hów functions are caIled. There are fivé exercises, each oné has a soIution in the CDCusersoIutions. The exercises maké use óf LEDs, general purposé pushbuttons, and thé temperature sensor fóund on the PlCDEM FS USB Démo Board.
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