📄 usb_9602.lst
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331 3 case 5:
332 3 bitset(EPC5,STALL);
333 3 SETBIT(stalld,BIT5);
334 3 break;
335 3 case 6:
336 3 bitset(EPC6,STALL);
337 3 SETBIT(stalld,BIT6);
338 3 break;
339 3 default:
340 3 break;
341 3 }
342 2 break;
343 2
344 2 default: /*UNDEFINED */
345 2 break;
346 2 }
347 1 }
348
349 /**********************************************************************/
350 /* The SET_CONFIGURATION request is done here */
351 /**********************************************************************/
352 void setconfiguration(void)
353 {
354 1 usb_cfg = usb_buf[2]; /*set the configuration # */
C51 COMPILER V5.50, USB_9602 02/12/99 16:05:13 PAGE 15
355 1 if (usb_buf[2]!=0) /*set the configuration */
356 1 {
357 2 dtapid = 0; /*FIRST PID is DATA0 */
358 2 stalld = 0; /*nothing stalled */
359 2
360 2 FLUSHTX1; /*flush TX1 and disable */
361 2 write_usb(EPC1,EP_EN+01); /*enable EP1 at adr 1 */
362 2
363 2 FLUSHRX1; /*flush RX1 and disable */
364 2 write_usb(EPC2,EP_EN+02); /*enable EP2 at adr 2 */
365 2 write_usb(RXC1,RX_EN); /*enable RX1 */
366 2
367 2 FLUSHTX3; /*flush TX1 and disable */
368 2 write_usb(EPC5,EP_EN+05); /*enable EP5 at adr 5 */
369 2
370 2 FLUSHRX3; /*flush RX3 and disable */
371 2 write_usb(EPC6,EP_EN+06); /*enable EP6 at adr 6 */
372 2 write_usb(RXC3,RX_EN); /*enable RX3 */
373 2 }
374 1 else /*unconfigure the device */
375 1 {
376 2 write_usb(EPC1,0); /*disable EP1 */
377 2 write_usb(EPC2,0); /*disable EP2 */
378 2 write_usb(EPC5,0); /*disable EP5 */
379 2 write_usb(EPC6,0); /*disable EP6 */
380 2 }
381 1 }
382
383 /**********************************************************************/
384 /* This subroutine loads a byte from a descriptor or report into the */
385 /* endpoint 0 fifo. */
386 /**********************************************************************/
387 void mlti_pkt(void)
388 {
389 1 unsigned char pckt_dta;
390 1
391 1 if(desc_sze>0)
392 1 {
393 2 if(TSTBIT(status,GETDESC))
394 2 switch (desc_typ) /*descriptor **************/
395 2 {
396 3 case DEVICE:
397 3 pckt_dta=DEV_DESC[desc_idx];
398 3 break;
399 3
400 3 case CONFIGURATION:
401 3 pckt_dta=CFG_DESC[desc_idx];
402 3 break;
403 3
404 3 case XSTRING:
405 3 pckt_dta=STR_DATA[desc_idx];
406 3 break;
407 3
408 3 case HID:
409 3 pckt_dta=CFG_DESC[desc_idx];
410 3 break;
411 3
412 3 case HIDREPORT:
413 3 pckt_dta=ReportDescriptor[desc_idx];
414 3 break;
415 3
416 3 default: /*UNDEFINED */
417 3 pckt_dta=0;
418 3 break;
419 3 }
420 2 else
C51 COMPILER V5.50, USB_9602 02/12/99 16:05:13 PAGE 16
421 2 switch (desc_typ) /*report ******************/
422 2 {
423 3 default: /*UNDEFINED */
424 3 pckt_dta=0;
425 3 break;
426 3 }
427 2
428 2 write_usb(TXD0,pckt_dta); /*send data to the FIFO */
429 2 desc_sze--; /*decriment size */
430 2 desc_idx++; /*increment index */
431 2 }
432 1 }
433
434 /**********************************************************************/
435 /* The CLEAR_FEATURE request is done here */
436 /**********************************************************************/
437 void clrfeature(void)
438 {
439 1 switch (usb_buf[0]&0x03) /*find request target */
440 1 {
441 2 case 0: /*DEVICE */
442 2 break;
443 2
444 2 case 1: /*INTERFACE */
445 2 break;
446 2
447 2 case 2: /*ENDPOINT */
448 2 switch (usb_buf[4]&0x0F) /*find specific endpoint */
449 2 { /* (strip off dir. bit) */
450 3 case 0:
451 3 bitclr(EPC0,STALL);
452 3 CLRBIT(stalld,BIT0);
453 3 break;
454 3 case 1:
455 3 bitclr(EPC1,STALL);
456 3 CLRBIT(stalld,BIT1);
457 3 break;
458 3 case 2:
459 3 bitclr(EPC2,STALL);
460 3 CLRBIT(stalld,BIT2);
461 3 break;
462 3 case 3:
463 3 bitclr(EPC3,STALL);
464 3 CLRBIT(stalld,BIT3);
465 3 break;
466 3 case 4:
467 3 bitclr(EPC4,STALL);
468 3 CLRBIT(stalld,BIT4);
469 3 break;
470 3 case 5:
471 3 bitclr(EPC5,STALL);
472 3 CLRBIT(stalld,BIT5);
473 3 break;
474 3 case 6:
475 3 bitclr(EPC6,STALL);
476 3 CLRBIT(stalld,BIT6);
477 3 break;
478 3 default:
479 3 break;
480 3 }
481 2 break;
482 2
483 2 default: /*UNDEFINED */
484 2 break;
485 2 }
486 1 }
C51 COMPILER V5.50, USB_9602 02/12/99 16:05:13 PAGE 17
487
488 /**********************************************************************/
489 /* The GET_DESCRIPTOR request is done here. */
490 /**********************************************************************/
491 void getdescriptor(void)
492 {
493 1 SET_GETDESC; /*enter GETDESC mode */
494 1 desc_typ = usb_buf[3]; /*store the type requested*/
495 1
496 1 /*select descriptor size and starting index */
497 1 switch (desc_typ)
498 1 {
499 2 case DEVICE:
500 2 desc_idx = 0;
501 2 desc_sze = DEV_DESC_SIZE;
502 2 break;
503 2
504 2 case CONFIGURATION:
505 2 desc_idx = 0;
506 2 desc_sze = CFG_DESC_SIZE;
507 2 break;
508 2
509 2 case XSTRING:
510 2 desc_idx = usb_buf[2];
511 2 desc_sze = STR_DATA[desc_idx];
512 2 break;
513 2
514 2 case HID:
515 2 /*valid if we have only one int: revisit if this changes */
516 2 desc_idx = CFG_LENGTH+INT_LENGTH;
517 2 desc_sze = CFG_DESC[(CFG_LENGTH+INT_LENGTH)];
518 2 break;
519 2
520 2 case HIDREPORT:
521 2 desc_idx = 0;
522 2 desc_sze = RPT_DESC_SIZE;
523 2 break;
524 2
525 2 default: /*UNDEFINED */
526 2 desc_idx = 0;
527 2 desc_sze = 0;
528 2 break;
529 2 }
530 1
531 1 /*adjust size, if the host has asked for less than we want to */
532 1 /*send. Note that we only check the low order byte of the */
533 1 /*wlength field. If we ever need to send back descriptors */
534 1 /*longer than 256 bytes, we'll need to revisit this */
535 1 if (usb_buf[7]==0) /*if less than 256 req'd */
536 1 if (desc_sze > usb_buf[6]) desc_sze = usb_buf[6];
537 1
538 1 /*send the first data chunk back */
539 1 mlti_pkt(); mlti_pkt(); mlti_pkt(); mlti_pkt();
540 1 mlti_pkt(); mlti_pkt(); mlti_pkt(); mlti_pkt();
541 1 }
542
543 /**********************************************************************/
544 /* The GET_STATUS request is done here */
545 /**********************************************************************/
546 void getstatus(void)
547 {
548 1 switch (usb_buf[0]&0x03) /*find request target */
549 1 {
550 2 case 0: /*DEVICE */
551 2 write_usb(TXD0,0); /*first byte is reserved */
552 2 break;
C51 COMPILER V5.50, USB_9602 02/12/99 16:05:13 PAGE 18
553 2
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