📄 rtl8019.lst
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246 {
247 1 unsigned char i;
248 1 unsigned char bnry;
249 1
250 1 unsigned char pageheader[4];
251 1 unsigned int rxlen;
252 1
253 1 // check for and handle an overflow
254 1 processRTL8019Interrupt();
255 1
256 1 // read CURR from page 1
257 1 writeRTL(CR,0x62);
258 1 i = readRTL(CURR);
259 1
260 1 // return to page 0
261 1 writeRTL(CR,0x22);
262 1
263 1 // read the boundary register - pointing to the beginning of the packet
264 1 bnry = readRTL(BNRY) ;
265 1
266 1 // return if there is no packet in the buffer
267 1 if( bnry == i )
268 1 return 0;
269 1
270 1
271 1 // clear the packet received interrupt flag
272 1 writeRTL(ISR, (1<<ISR_PRX));
273 1
274 1 // the boundary pointer is invalid, reset the contents of the buffer and exit
275 1 if( (bnry >= RXSTOP_INIT) || (bnry < RXSTART_INIT) )
276 1 {
277 2 writeRTL(BNRY, RXSTART_INIT);
278 2 writeRTL(CR, 0x62);
279 2 writeRTL(CURR, RXSTART_INIT);
280 2 writeRTL(CR, 0x22);
281 2
282 2 return 0;
283 2 }
284 1
285 1 // initiate DMA to transfer the RTL8019 packet header
286 1 writeRTL(RBCR0, 4);
287 1 writeRTL(RBCR1, 0);
288 1 writeRTL(RSAR0, 0);
289 1 writeRTL(RSAR1, bnry);
290 1 writeRTL(CR, 0x0A);
291 1 for(i=0;i<4;i++)
292 1 pageheader[i] = readRTL(RDMAPORT);
293 1
294 1 // end the DMA operation
295 1 writeRTL(CR, 0x22);
296 1 for(i = 0; i <= 20; i++)
297 1 if(readRTL(ISR) & 1<<6)
298 1 break;
299 1 writeRTL(ISR, 1<<6);
300 1
301 1
302 1 rxlen = (pageheader[enetpacketLenH]<<8) + pageheader[enetpacketLenL];
C51 COMPILER V7.06 RTL8019 04/05/2006 12:13:02 PAGE 6
303 1 nextPage = pageheader[nextblock_ptr] ;
304 1
305 1 currentRetreiveAddress = (bnry<<8) + 4;
306 1
307 1 // if the nextPage pointer is invalid, the packet is not ready yet - exit
308 1 if( (nextPage >= RXSTOP_INIT) || (nextPage < RXSTART_INIT) )
309 1 return 0;
310 1
311 1 return rxlen-4;
312 1 }
313
314
315 void RTL8019retreivePacketData(unsigned char * localBuffer, unsigned int length)
316 {
317 1 unsigned int i;
318 1
319 1 // initiate DMA to transfer the data
320 1 writeRTL(RBCR0, (unsigned char)length);
321 1 writeRTL(RBCR1, (unsigned char)(length>>8));
322 1 writeRTL(RSAR0, (unsigned char)currentRetreiveAddress);
323 1 writeRTL(RSAR1, (unsigned char)(currentRetreiveAddress>>8));
324 1 writeRTL(CR, 0x0A);
325 1 for(i=0;i<length;i++)
326 1 localBuffer[i] = readRTL(RDMAPORT);
327 1
328 1 // end the DMA operation
329 1 writeRTL(CR, 0x22);
330 1 for(i = 0; i <= 20; i++)
331 1 if(readRTL(ISR) & 1<<6)
332 1 break;
333 1 writeRTL(ISR, 1<<6);
334 1
335 1 currentRetreiveAddress += length;
336 1 if( currentRetreiveAddress >= 0x6000 )
337 1 currentRetreiveAddress = currentRetreiveAddress - (0x6000-0x4600) ;
338 1 }
339
340
341
342 void RTL8019endPacketRetreive(void)
343 {
344 1 unsigned char i;
345 1
346 1 // end the DMA operation
347 1 writeRTL(CR, 0x22);
348 1 for(i = 0; i <= 20; i++)
349 1 if(readRTL(ISR) & 1<<6)
350 1 break;
351 1 writeRTL(ISR, 1<<6);
352 1
353 1 // set the boundary register to point to the start of the next packet
354 1 writeRTL(BNRY, nextPage);
355 1 }
356 //-----------------------------------------
357 void overrun(void)
358 {
359 1 unsigned char data_L, resend;
360 1 INT16U count;
361 1
362 1 data_L = readRTL(CR);
363 1 writeRTL(CR, 0x21);
364 1 // Delay_1ms(2);
C51 COMPILER V7.06 RTL8019 04/05/2006 12:13:02 PAGE 7
365 1 for(count=0;count<20000;count++);
366 1 writeRTL(RBCR0, 0x00);
367 1 writeRTL(RBCR1, 0x00);
368 1 if(!(data_L & 0x04))
369 1 resend = 0;
370 1 else if(data_L & 0x04)
371 1 {
372 2 data_L = readRTL(ISR);
373 2 if((data_L & 0x02) || (data_L & 0x08))
374 2 resend = 0;
375 2 else
376 2 resend = 1;
377 2 }
378 1
379 1 writeRTL(TCR, 0x02);
380 1 writeRTL(CR, 0x22);
381 1 writeRTL(BNRY, RXSTART_INIT);
382 1 writeRTL(CR, 0x62);
383 1 writeRTL(CURR, RXSTART_INIT);
384 1 writeRTL(CR, 0x22);
385 1 writeRTL(ISR, 0x10);
386 1 writeRTL(TCR, TCR_INIT);
387 1
388 1 writeRTL(ISR, 0xFF);
389 1 }
390
391
392
393
394
395
396 void initRTL8019(void)
397 {
398 1 // INT8U temp;
399 1 INT16U COUNT;
400 1 RTL8019setupPorts();
401 1
402 1 HARD_RESET_RTL8019();
403 1
404 1 // do soft reset
405 1 writeRTL( ISR, readRTL(ISR) ) ;
406 1 // Delay_10ms(5);
407 1
408 1 for(COUNT=0;COUNT<15000;COUNT++);
409 1
410 1 writeRTL(CR,0x21); // stop the NIC, abort DMA, page 0
411 1 // Delay_1ms(2); // make sure nothing is coming in or going out
412 1 for(COUNT=0;COUNT<2000;COUNT++);
413 1
414 1 writeRTL(DCR, DCR_INIT); // 0x58
415 1 writeRTL(RBCR0,0x00);
416 1 writeRTL(RBCR1,0x00);
417 1 writeRTL(RCR,0x04);
418 1 writeRTL(TPSR, TXSTART_INIT);
419 1 writeRTL(TCR,0x02);
420 1 writeRTL(PSTART, RXSTART_INIT);
421 1 writeRTL(BNRY, RXSTART_INIT);
422 1 writeRTL(PSTOP, RXSTOP_INIT);
423 1 writeRTL(CR, 0x61);
424 1 // Delay_1ms(2);
425 1 for(COUNT=0;COUNT<2000;COUNT++);
426 1 writeRTL(CURR, RXSTART_INIT);
C51 COMPILER V7.06 RTL8019 04/05/2006 12:13:02 PAGE 8
427 1
428 1 writeRTL(PAR0+0, MYMAC_0);
429 1 writeRTL(PAR0+1, MYMAC_1);
430 1 writeRTL(PAR0+2, MYMAC_2);
431 1 writeRTL(PAR0+3, MYMAC_3);
432 1 writeRTL(PAR0+4, MYMAC_4);
433 1 writeRTL(PAR0+5, MYMAC_5);
434 1 /*
435 1 temp=readRTL(CR+0);
436 1 Uart0_printR(&temp,1);
437 1 temp=readRTL(PAR0+0);
438 1 Uart0_printR(&temp,1);
439 1 temp=readRTL(PAR0+1);
440 1 Uart0_printR(&temp,1);*/
441 1
442 1 writeRTL(CR,0x21);
443 1 writeRTL(DCR, DCR_INIT);
444 1 writeRTL(CR,0x22);
445 1 writeRTL(ISR,0xFF);
446 1 writeRTL(IMR, IMR_INIT);
447 1 writeRTL(TCR, TCR_INIT);
448 1
449 1 writeRTL(CR, 0x22); // start the NIC
450 1
451 1 }
452
453
454 void processRTL8019Interrupt(void)
455 {
456 1 unsigned char byte = readRTL(ISR);
457 1
458 1 if( byte & (1<<ISR_OVW) )
459 1 overrun();
460 1
461 1 }
462
463 /*
464 unsigned char RTL8019ReceiveEmpty(void)
465 {
466 unsigned char temp;
467
468 // read CURR from page 1
469 writeRTL(CR,0x62);
470 temp = readRTL(CURR);
471
472 // return to page 0
473 writeRTL(CR,0x22);
474
475 return ( readRTL(BNRY) == temp );
476
477 }*/
478
479 void RTl8019_int(void) interrupt 0
480 { // Uart0_print("pack in\n");
481 1 OSSemPost(Sem_RecPackage);
482 1 }
483
484
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 1266 ----
C51 COMPILER V7.06 RTL8019 04/05/2006 12:13:02 PAGE 9
CONSTANT SIZE = ---- ----
XDATA SIZE = 3 20
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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