📄 sl811.lst
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245 5 SL811Write(EP0Address, addr); // data buffer addr
246 5 SL811Write(IntStatus,INT_CLEAR); // is a LS is on Hub.
247 5 SL811Write(EP0Control,cmd); // Enable USB transfer and re-arm
248 5 }
249 4
250 4 //------------------------------------------------
251 4 // Copy last IN token data pkt from prev transfer
252 4 // Check if there was data available during the
253 4 // last data transfer
254 4 //------------------------------------------------
255 4 if(bufLen)
256 4 {
257 5 SL811BufRead(((dataX&1)?data0:data1), usbstack.buffer, bufLen);
258 5 usbstack.buffer += bufLen;
259 5 }
260 4
261 4 //------------------------------------------------
262 4 // Terminate on short packets, i.e. remainder!=0
263 4 // a short packet or empty data packet OR when
264 4 // requested data len have completed, i.e.wLen=0
265 4 // For a LOWSPEED device, the 1st device descp,
266 4 // wPayload is default to 64-byte, LS device will
267 4 // only send back a max of 8-byte device descp,
268 4 // and host detect this as a short packet, and
269 4 // terminate with OUT status stage
270 4 //------------------------------------------------
271 4 if(remainder || !usbstack.wLen)
272 4 break;
273 4 }// PID IN
274 3 }
275 2
276 2 //-------------------------NAK----------------------------
277 2 if (result & EP0_NAK) // NAK Detected
278 2 {
279 3 if(usbstack.endpoint==0) // on ep0 during enumeration of LS device
280 3 { // happen when slave is not fast enough,
281 4 SL811Write(IntStatus,INT_CLEAR); // clear interrupt status, need to
282 4 SL811Write(EP0Control,cmd); // re-arm and request for last cmd, IN token
283 4 result = 0; // respond to NAK status only
284 4 }
285 3 else // normal data endpoint, exit now !!! , non-zero ep
286 3 break; // main loop control the interval polling
287 3 }
288 2
289 2 //-----------------------TIMEOUT--------------------------
290 2 if (result & EP0_TIMEOUT) // TIMEOUT Detected
291 2 {
292 3 if(usbstack.endpoint==0) // happens when hub enumeration
293 3 {
294 4 if(++timeout >= TIMEOUT_RETRY)
295 4 {
296 5 timeout--;
297 5 break; // exit on the timeout detected
298 5 }
299 4 SL811Write(IntStatus,INT_CLEAR); // clear interrupt status, need to
300 4 SL811Write(EP0Control,cmd); // re-arm and request for last cmd again
301 4 }
302 3 else
C51 COMPILER V6.20c SL811 08/21/2003 22:51:04 PAGE 6
303 3 { // all other data endpoint, data transfer
304 4 bXXGFlags.bits.TIMEOUT_ERR = TRUE; // failed, set flag to terminate transfer
305 4 break; // happens when data transfer on a device
306 4 } // through the hub
307 3 }
308 2
309 2 //-----------------------STALL----------------------------
310 2 if (result & EP0_STALL) // STALL detected
311 2 return TRUE; // for unsupported request.
312 2
313 2 //----------------------OVEFLOW---------------------------
314 2 if (result & EP0_OVERFLOW) // OVERFLOW detected
315 2 //result=result;
316 2 break;
317 2 //-----------------------ERROR----------------------------
318 2 if (result & EP0_ERROR) // ERROR detected
319 2 //result=result;
320 2 break;
321 2 } // end of While(1)
322 1
323 1 if (result & EP0_ACK) // on ACK transmission
324 1 return TRUE; // return OK
325 1
326 1 return FALSE; // fail transmission
327 1
328 1 }
329 //*****************************************************************************************
330 // Control Endpoint 0's USB Data Xfer
331 // ep0Xfer, endpoint 0 data transfer
332 //*****************************************************************************************
333 unsigned char ep0Xfer(void)
334 {
335 1 //unsigned char wLen;
336 1
337 1 //wLen=usbstack.wLen;
338 1 usbstack.endpoint=0;
339 1 //----------------------------------------------------
340 1 // SETUP token with 8-byte request on endpoint 0
341 1 //----------------------------------------------------
342 1 usbstack.pid=PID_SETUP;
343 1 usbstack.wLen=8;
344 1 //usbstack.buffer=&usbstack.setup;
345 1 if (!usbXfer())
346 1 return FALSE;
347 1 //DelayMs(10);
348 1 usbstack.pid = PID_IN;
349 1 //----------------------------------------------------
350 1 // IN or OUT data stage on endpoint 0
351 1 //----------------------------------------------------
352 1 usbstack.wLen=usbstack.setup.wLength;
353 1 if (usbstack.wLen) // if there are data for transfer
354 1 {
355 2 if (usbstack.setup.bmRequest & 0x80) // host-to-device : IN token
356 2 {
357 3 usbstack.pid = PID_IN;
358 3
359 3 if(!usbXfer())
360 3 return FALSE;
361 3 //usbstack.wPayload = 0;
362 3 usbstack.pid = PID_OUT;
363 3 }
364 2 else // device-to-host : OUT token
C51 COMPILER V6.20c SL811 08/21/2003 22:51:04 PAGE 7
365 2 {
366 3 usbstack.pid = PID_OUT;
367 3
368 3 if(!usbXfer())
369 3 return FALSE;
370 3 usbstack.pid = PID_IN;
371 3 }
372 2 }
373 1 //DelayMs(10);
374 1 //----------------------------------------------------
375 1 // Status stage IN or OUT zero-length data packet
376 1 //----------------------------------------------------
377 1 usbstack.wLen=0;
378 1 if(!usbXfer())
379 1 return FALSE;
380 1
381 1 return TRUE;
382 1
383 1 }
384
385
386 unsigned char epBulkSend(unsigned char *pBuffer,unsigned int len)
387 {
388 1 usbstack.usbaddr=0x1;
389 1 usbstack.endpoint=usbstack.epbulkout;
390 1 usbstack.pid=PID_OUT;
391 1 usbstack.wPayload=64;
392 1 usbstack.wLen=len;
393 1 usbstack.buffer=pBuffer;
394 1 /*
395 1 while(len>0)
396 1 {
397 1 if (len > usbstack.wPayload)
398 1 usbstack.wLen = usbstack.wPayload;
399 1 else
400 1 usbstack.wLen = len;
401 1 while(!usbXfer());
402 1 //DelayMs(10);
403 1 //return FALSE;
404 1 len-=usbstack.wLen;
405 1 usbstack.buffer=usbstack.buffer+usbstack.wLen;
406 1 //DelayUs(10);
407 1 }
408 1 */
409 1 if(usbstack.wLen)
410 1 {
411 2 while(!usbXfer());
412 2 }
413 1 return TRUE;
414 1 }
415
416 unsigned char epBulkRcv(unsigned char *pBuffer,unsigned int len)
417 {
418 1 usbstack.usbaddr=0x1;
419 1 usbstack.endpoint=usbstack.epbulkin;
420 1 usbstack.pid=PID_IN;
421 1 usbstack.wPayload=64;
422 1 usbstack.wLen=len;
423 1 usbstack.buffer=pBuffer;
424 1 if(usbstack.wLen)
425 1 {
426 2 while(!usbXfer());
C51 COMPILER V6.20c SL811 08/21/2003 22:51:04 PAGE 8
427 2 //return FALSE;
428 2 }
429 1 return TRUE;
430 1 }
431 //*****************************************************************************************
432 // Control endpoint
433 //*****************************************************************************************
434 //void VendorCmd(void)
435 //{
436 // ep0Xfer();
437 //}
438
439 //*****************************************************************************************
440 // Set Device Address :
441 //*****************************************************************************************
442 unsigned char SetAddress(unsigned char addr)
443 {
444 1 usbstack.usbaddr=0;
445 1 usbstack.setup.bmRequest=0;
446 1 usbstack.setup.bRequest=SET_ADDRESS;
447 1 usbstack.setup.wValue=addr;
448 1 usbstack.setup.wIndex=0;
449 1 usbstack.setup.wLength=0;
450 1 //usbstack.buffer=&usbstack.setup;
451 1 return ep0Xfer();
452 1
453 1 }
454
455 //*****************************************************************************************
456 // Set Device Configuration :
457 //*****************************************************************************************
458 unsigned char Set_Configuration(void)
459 {
460 1 //usbstack.usbaddr=usbaddr;
461 1 //usbstack.
462 1 usbstack.setup.bmRequest=0;
463 1 usbstack.setup.bRequest=SET_CONFIG;
464 1 //usbstack.setup.wValue=wVal;
465 1 usbstack.setup.wIndex=0;
466 1 usbstack.setup.wLength=0;
467 1 usbstack.buffer=NULL;
468 1 return ep0Xfer();
469 1
470 1 }
471
472 //*****************************************************************************************
473 // Get Device Descriptor : Device, Configuration, String
474 //*****************************************************************************************
475 unsigned char GetDesc(void)
476 {
477 1
478 1 usbstack.setup.bmRequest=0x80;
479 1 usbstack.setup.bRequest=GET_DESCRIPTOR;
480 1 usbstack.setup.wValue=WordSwap(usbstack.setup.wValue);
481 1
482 1 usbstack.wPayload=uDev.wPayLoad[0];
483 1 //usbstack.buffer=&usbstack.setup;
484 1 return ep0Xfer();
485 1 }
486
487 //*****************************************************************************************
488 // USB Data Endpoint Read/Write
C51 COMPILER V6.20c SL811 08/21/2003 22:51:04 PAGE 9
489 // wLen is in low byte first format
490 //*****************************************************************************************
491 /*
492 unsigned char DataRW(BYTE epaddr)
493 {
494 //xdata BYTE pid = PID_OUT;
495
496 usbstack.pid=PID_OUT;
497 usbstack.endpoint=epaddr&0x0F;
498
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