📄 main.lst
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238 4 IIC_Busy=1;
239 4 // while(IIC_Busy==1);
240 4
241 4 }
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 5
242 3
243 3
244 3 }
245 2 if(RxFlag==1)
246 2 {
247 3 RxFlag=0;
248 3 SBUF0=RxData;
249 3 while(UART_Tx_Complete == 0);
250 3 UART_Tx_Complete = 0;
251 3
252 3 }
253 2
254 2 }
255 1
256 1 }
257 /*SMBus中断处理程序*/
258 void SMBus_Interrupt(void) interrupt 7
259 {
260 1
261 1 bit FAIL; // Used by the ISR to flag failed
262 1 // transfers
263 1 static bit ADDR_SEND; // Used by the ISR to flag byte
264 1 // transmissions as slave addresses
265 1
266 1 switch (SMB0CN & 0xF0) // Status vector
267 1 {
268 2 // Master Transmitter/Receiver: START condition transmitted.
269 2 case SMB_MTSTA:
270 2 //SMB0DAT = TARGET; // Load address of the target slave
271 2 //SMB0DAT |= SMB_RW; // Load R/W bit
272 2 //STA = 0; // Manually clear START bit
273 2 SMB0DAT =RWByte;//UartFrame[1] ; //发出从器件XFP地址以及R/W位
274 2 //SBUF0=UartFrame[1];
275 2 //while(UART_Tx_Complete == 0);
276 2 //UART_Tx_Complete = 0;
277 2 STA = 0;
278 2 i=1;
279 2 ADDR_SEND = 1;
280 2 break;
281 2
282 2 // Master Transmitter: Data byte transmitted
283 2 case SMB_MTDB:
284 2 if (ACK) // Slave ACK?
285 2 {
286 3 //if(UartFrame[1]==0xA1) //此次是读操作里面的写地址
287 3 // {
288 3 // SMB0DAT =UartFrame[2] ; //读Rom的地址
289 3 // StopRequire=1;
290 3 // STO=1; //写地址完毕
291 3 // // IIC_Busy=0;
292 3 // }
293 3
294 3 //else //是写操作
295 3 //{
296 3
297 3 i++;
298 3 if(RWByte==0xA0)//WRITE
299 3 {
300 4 if(((UartFrame[i]=='P')&&(i==UartFrame_Num))||(StopRequire==1))//stop
301 4 {
302 5 STO=1; //停止命令
303 5 // pRomAddr=pRomAddr+i-3;
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 6
304 5 IIC_Busy=0;
305 5 StopRequire=0;
306 5 }
307 4 else //send
308 4 {
309 5 SMB0DAT =UartFrame[i] ; //写Prom的地址或数据,发送
310 5 if(UartFrame[1]==0xA1) //此次是读操作里面的写地址
311 5 StopRequire=1;
312 5
313 5 ////SBUF0=UartFrame[1];
314 5 //while(UART_Tx_Complete == 0);
315 5 // UART_Tx_Complete = 0;
316 5 }
317 4 }
318 3 else{} //do nothing
319 3
320 3 //}
321 3 /*
322 3 if (ADDR_SEND) // If the previous byte was a slave
323 3 { // address,
324 3 ADDR_SEND = 0; // Next byte is not a slave address
325 3 if (SMB_RW==WRITE) // If this transfer is a WRITE,
326 3 {
327 3 SMB0DAT = SMB_DATA_OUT; // send data byte
328 3 }
329 3 else {} // If this transfer is a READ,
330 3 // proceed with transfer without
331 3 // writing to SMB0DAT (switch
332 3 // to receive mode)
333 3 }
334 3 else // If previous byte was not a slave
335 3 { // address,
336 3 STO = 1; // set STO to terminte transfer
337 3 SMB_BUSY = 0; // and free SMBus interface
338 3 }*/
339 3 }
340 2 else // If slave NACK,
341 2 {
342 3 FAIL = 1; // Indicate failed transfer
343 3 // and handle at end of ISR
344 3 }
345 2 break;
346 2
347 2 // Master Receiver: byte received
348 2 case SMB_MRDB:
349 2 // UartTxFrame[i+1] =SMB0DAT; //发出从器件地址以及R/W位
350 2 RxData=SMB0DAT;
351 2 RxFlag=1;
352 2 // UartTxFrame[i]=pRomAddr;
353 2 pRomAddr++;
354 2 I2CRxNum--;
355 2 if((I2CRxNum!=0)&&(pRomAddr!=256)) //读页数据
356 2 //if((UartFrame[3]==0xFF)&&(pRomAddr!=256)) //读页数据
357 2 {
358 3 ACK=1;
359 3 i=i+2;
360 3 }
361 2 else
362 2 {
363 3 ACK=0; //给出传送完毕信息
364 3 //i=0;
365 3 STO=1; //停止
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 7
366 3 IIC_Busy=0;
367 3 }
368 2
369 2 //SMB_DATA_IN = SMB0DAT; // Store received byte
370 2 //SMB_BUSY = 0; // Free SMBus interface
371 2 //ACK = 0; // Send NACK to indicate last byte
372 2 // of this transfer
373 2
374 2 //STO = 1; // Send STOP to terminate transfer
375 2 break;
376 2
377 2 default:
378 2 FAIL = 1; // Indicate failed transfer
379 2 // and handle at end of ISR
380 2 break;
381 2
382 2 } // end switch
383 1
384 1 if (FAIL) // If the transfer failed,
385 1 {
386 2 SMB0CN &= ~0x40; // Reset communication
387 2 SMB0CN |= 0x40;
388 2 SMB_BUSY = 0; // Free SMBus
389 2 }
390 1
391 1 SI=0; // clear interrupt flag
392 1
393 1 }
394 /*UART中断处理程序*/
395 void UART_Interrupt(void) interrupt 4
396 {
397 1
398 1 /*如果串口接收到一个字节，将其写入串口缓冲区*/
399 1 if(RI0)
400 1 {
401 2 // LED=!LED;
402 2 temp=SBUF0;
403 2 t++;
404 2 // SBUF0=UartFrame[i];
405 2 // while(UART_Tx_Complete == 0);
406 2 // UART_Tx_Complete = 0;
407 2
408 2 if((temp=='S')&&(temp_last=='P')) //起始
409 2 {
410 3 num=0;
411 3 UartFrame[0]=temp;
412 3 }
413 2 else if(UartFrame[0]=='S')
414 2 UartFrame[num]=temp;
415 2
416 2 if((temp=='P')&&(UartFrame[0]=='S'))
417 2 {
418 3 // if(((UartFrame[1]==0xA0)&&(UartFrame[3]==num))||(UartFrame[1]==0xA1))//写操作需要长度信息。
419 3 {
420 4 // UartFrame_Complete=1;
421 4
422 4 if((num+1)>=5) //必须大于5个数据才算一组帧
423 4 {
424 5 UartFrame_Complete=1;
425 5 UartFrame_Num=num;//UartFrame_Num是这个包的数据个数
426 5
427 5 }
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 8
428 4 //else UartFrame[num]=temp;
429 4 }
430 3
431 3 }
432 2 num++;
433 2
434 2 temp_last=temp;
435 2
436 2 RI0=0;
437 2
438 2 }
439 1 /*如果串口发送完一个字节，将UART_Tx_Complete置1*/
440 1 else if(TI0)
441 1 {
442 2
443 2 UART_Tx_Complete = 1;
444 2 TI0 = 0;
445 2 }
446 1 }
447
448
449 /*SMBus发送字节程序*/
450 void SMBus_Tx(unsigned char ch)
451 {
452 1 while(SMB0CF & 0x20 != 0);//查询SMBus总线是否BUSY
453 1 SMBus_Txchar = ch;
454 1 SMBus_TxCount = 1;
455 1 STA = 1;
456 1 }
457 /*读缓冲区程序*/
458 unsigned char ReadBuffer(unsigned char* Buffer,unsigned char* pFront,unsigned char* pRear)
459 {
460 1 unsigned char ch;
461 1 *pFront = ((*pFront)+1) % MAXBUFSIZE;
462 1 ch = Buffer[*pFront];
463 1 return ch;
464 1 }
*** WARNING C280 IN LINE 458 OF MAIN.C: 'pRear': unreferenced local variable
465
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 628 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 400 ----
PDATA SIZE = ---- ----
DATA SIZE = 28 9
IDATA SIZE = ---- ----
BIT SIZE = 5 1
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 1 WARNING(S), 0 ERROR(S)
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