?? chap_9.lst
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384 //Get_Descriptor()獲取描述符
385 void get_descriptor(void)
386 {
387 1
388 1 switch(USB_Device_Request.wValue)
389 1 {
390 2 case 1://設備描述符
391 2 //選擇描述符
392 2 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
393 2 Descriptor_Ptr = &Standard_Device_Descriptor[0]; //set pointer to device descriptor
394 2 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
395 2 Descriptor_Ptr = &HS_Device_Descriptor[0]; //set pointer to device descriptor
396 2 count = *Descriptor_Ptr; //read in descriptor length
397 2 //選擇端點號
398 2 D14_Cntrl_Reg.D14_ENDPT_INDEX = 1;
399 2 //寫下發送字節數
400 2 D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB = 0x12;
401 2 D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = 0;
402 2 //send descriptor
403 2 //發送描述符
404 2 while(count != 0)
405 2 {
406 3 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
407 3 count--;
408 3 Descriptor_Ptr++;
409 3 }
410 2 wait_ep0tx();
411 2 ep0out_ack();
412 2 break;
413 2
414 2 case 2 : //獲取配置描述符
415 2 USB_Int_Flag.BITS.EP0RX = 0;
416 2 Temp = 64;
417 2 Descriptor_Ptr = &Standard_Config_Descriptor[0]; //set pointer to configuration descriptor
418 2 count = *Descriptor_Ptr; //get configuration Descriptor length
419 2 //選擇端點號1
420 2 D14_Cntrl_Reg.D14_ENDPT_INDEX = 1;
421 2 //check if only configuration descriptor required
422 2 //檢查描述符長度,決定是只發送配置描述符還是描述符集合
423 2 if(count >= USB_Device_Request.wLength) //Send only Configuration descriptor
424 2 {
425 3 //寫入發送字節數
426 3 D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB = (UC) USB_Device_Request.wLength;
427 3 D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = (UC) (USB_Device_Request.wLength >> 8);
C51 COMPILER V7.01 CHAP_9 03/28/2003 14:38:29 PAGE 8
428 3 //send descriptor
429 3 //發送描述符
430 3 for(count = 0 ; count < USB_Device_Request.wLength ; count++)
431 3 {
432 4 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
433 4 Descriptor_Ptr++;
434 4 }
435 3 wait_ep0tx();
436 3 ep0out_ack();
437 3 }
438 2 else //send Configuration,Interface and Endpoint descriptor
439 2 {
440 3 //發送描述符集合(配置+接口+端點)
441 3 if(USB_Device_Request.wLength >= 32)
442 3 {
443 4 //寫入配置描述符
444 4 while(count != 0)
445 4 {
446 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
447 5 count--;
448 5 Descriptor_Ptr++;
449 5 }
450 4 //選擇高速還是全速接口描述符
451 4 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
452 4 Descriptor_Ptr = &Bulk_Interface_Descriptor[0]; //set pointer to interface descriptor
453 4 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
454 4 Descriptor_Ptr = &HS_Bulk_Interface_Descriptor[0]; //set pointer to interface descriptor
455 4 count = *Descriptor_Ptr; //get the descriptor count
456 4 //寫入接口描述符
457 4 while(count != 0)
458 4 {
459 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
460 5 count--;
461 5 Descriptor_Ptr++;
462 5 }
463 4 //選擇高速還是全速端點1IN描述符
464 4 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
465 4 Descriptor_Ptr = &Int_In_Descriptor[0]; //set pointer to interface descriptor
466 4 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
467 4 Descriptor_Ptr = &HS_Int_In_Descriptor[0]; //set pointer to interface descriptor
468 4 count = *Descriptor_Ptr; //read in descriptor length
469 4 //寫入端點1IN描述符
470 4 while(count != 0)
471 4 {
472 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
473 5 count--;
474 5 Descriptor_Ptr++;
475 5 }
476 4 //選擇高速還是全速端點1OUT描述符
477 4 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
478 4 Descriptor_Ptr = &Int_Out_Descriptor[0]; //set pointer to interface descriptor
479 4 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
480 4 Descriptor_Ptr = &HS_Int_Out_Descriptor[0]; //set pointer to interface descriptor
481 4 count = *Descriptor_Ptr; //read in descriptor length
482 4 //寫入端點1OUT描述符
483 4 while(count != 0)
484 4 {
485 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
486 5 count--;
487 5 Descriptor_Ptr++;
488 5 }
489 4 //選擇高速還是全速端點2IN描述符
C51 COMPILER V7.01 CHAP_9 03/28/2003 14:38:29 PAGE 9
490 4 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
491 4 Descriptor_Ptr = &Bulk_In_Descriptor[0]; //set pointer to interface descriptor
492 4 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
493 4 Descriptor_Ptr = &HS_Bulk_In_Descriptor[0]; //set pointer to interface descriptor
494 4 count = *Descriptor_Ptr; //read in descriptor length
495 4 //寫入端點2IN描述符
496 4 while(count != 0)
497 4 {
498 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
499 5 count--;
500 5 Descriptor_Ptr++;
501 5 }
502 4 //選擇高速還是全速端點2OUT描述符
503 4 if(Kernel_Flag.BITS.HS_FS_State == FULL_SPEED)
504 4 Descriptor_Ptr = &Bulk_Out_Descriptor[0]; //set pointer to interface descriptor
505 4 if(Kernel_Flag.BITS.HS_FS_State == HIGH_SPEED)
506 4 Descriptor_Ptr = &HS_Bulk_Out_Descriptor[0]; //set pointer to interface descriptor
507 4 count = *Descriptor_Ptr; //read in descriptor length
508 4 //寫入端點2OUT描述符
509 4 while(count != 0)
510 4 {
511 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
512 5 count--;
513 5 Descriptor_Ptr++;
514 5 }
515 4 }
516 3 //使端點有效
517 3 D14_Cntrl_Reg.D14_CONTROL_FUNCTION.BITS.VENDP = 1; //validate FIFO
518 3 wait_ep0tx();
519 3 ep0out_ack();
520 3 }
521 2 break;
522 2
523 2 case 3: //獲取字符串描述符
524 2 Descriptor_Ptr = &Standard_String_ID[0]; //set pointer to interface descriptor
525 2 count = *Descriptor_Ptr; //get length
526 2 D14_Cntrl_Reg.D14_ENDPT_INDEX = 1;
527 2 if(USB_Device_Request.wLength < count)
528 2 count = USB_Device_Request.wLength; //get the remaining length
529 2 D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB = count;
530 2 D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = 0;
531 2 //send string ID
532 2 while(count != 0)
533 2 {
534 3 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr; //fill up FIFO
535 3 Descriptor_Ptr++;
536 3 count--;
537 3 }
538 2 wait_ep0tx();
539 2 ep0out_ack();
540 2 break;
541 2
542 2
543 2 case 4:
544 2 reserved();
545 2 break;
546 2
547 2 case 5: //獲取端點描述符
548 2 Temp = 0;
549 2 if((USB_Device_Request.wValue & 0x00ff) > 0x0001)
550 2 {
551 3 D14_Cntrl_Reg.D14_CONTROL_FUNCTION.BITS.STALL = 1;
C51 COMPILER V7.01 CHAP_9 03/28/2003 14:38:29 PAGE 10
552 3 while(!USB_Int_Flag.BITS.EP0SETUP)
553 3 {
554 4 //讀取ISP1581中斷寄存器
555 4 USB_Int_Flag.VALUE |= D14_Cntrl_Reg.D14_INT.VALUE;
556 4 //回寫ISP1581中斷寄存器
557 4 D14_Cntrl_Reg.D14_INT.VALUE = USB_Int_Flag.VALUE;
558 4 if(USB_Int_Flag.BITS.SUSP || USB_Int_Flag.BITS.RESET)
559 4 return;
560 4 }
561 3 USB_Int_Flag.BITS.EP0TX = 0;
562 3 }
563 2 else
564 2 {
565 3 Descriptor_Ptr = &Bulk_Out_Descriptor[0]; //set pointer to Bulk Out endpoint descriptor
566 3 count = *Descriptor_Ptr; //read in descriptor length
567 3 D14_Cntrl_Reg.D14_ENDPT_INDEX = 1;
568 3 if(count >= USB_Device_Request.wLength)
569 3 {
570 4 Temp = USB_Device_Request.wLength;
571 4 //send endpoint descriptor
572 4 D14_Cntrl_Reg.D14_BUFFER_LENGTH_LSB = (UC) Temp;
573 4 D14_Cntrl_Reg.D14_BUFFER_LENGTH_MSB = (UC) (Temp >> 8);
574 4 for(count = 0 ; count < USB_Device_Request.wLength ; count++)
575 4 {
576 5 D14_Cntrl_Reg.D14_DATA_PORT_LSB = *Descriptor_Ptr;
577 5 Descriptor_Ptr++;
578 5 }
579 4 wait_ep0tx();
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