dscr.a51

网上流传的usb_blaster原理图里的CPLD源码,主要是实现usb时序转换成JATG时序输出！

;;-----------------------------------------------------------------------------
;;   File:      dscr.a51
;;   Contents:   Descriptor data tables for usbjtag.
;;-----------------------------------------------------------------------------
;; This file has been derived from dscr.a51 delivered with CY3681
;; development kit from Cypress Semiconductor. That is
;;   Copyright (c) 1997 AnchorChips, Inc. All rights reserved
;;-----------------------------------------------------------------------------   
DSCR_DEVICE   equ   1   ;; Descriptor type: Device
DSCR_CONFIG   equ   2   ;; Descriptor type: Configuration
DSCR_STRING   equ   3   ;; Descriptor type: String
DSCR_INTRFC   equ   4   ;; Descriptor type: Interface
DSCR_ENDPNT   equ   5   ;; Descriptor type: Endpoint
DSCR_DEVQUAL  equ   6   ;; Descriptor type: Device Qualifier

DSCR_DEVICE_LEN   equ   18
DSCR_CONFIG_LEN   equ    9
DSCR_INTRFC_LEN   equ    9
DSCR_ENDPNT_LEN   equ    7
DSCR_DEVQUAL_LEN  equ   10

ET_CONTROL   equ   0   ;; Endpoint type: Control
ET_ISO       equ   1   ;; Endpoint type: Isochronous
ET_BULK      equ   2   ;; Endpoint type: Bulk
ET_INT       equ   3   ;; Endpoint type: Interrupt

public      DeviceDscr, DeviceQualDscr, HighSpeedConfigDscr, FullSpeedConfigDscr, StringDscr, UserDscr

DSCR   SEGMENT   CODE PAGE

;;-----------------------------------------------------------------------------
;; Global Variables
;;-----------------------------------------------------------------------------
      rseg DSCR              ;; locate the descriptor table in on-part memory.

DeviceDscr:   
      db   DSCR_DEVICE_LEN   ;; Descriptor length
      db   DSCR_DEVICE       ;; Decriptor type
      dw   1001H             ;; Specification Version (BCD)
      db   00H               ;; Device class
      db   00H               ;; Device sub-class
      db   00H               ;; Device sub-sub-class
      db   40H               ;; Maximum packet size
      dw   016C0H            ;; Vendor ID
      dw   006ADH            ;; Product ID
      dw   0004H             ;; Product version ID (4.00)
      db   1                 ;; Manufacturer string index
      db   2                 ;; Product string index
      db   3                 ;; Serial number string index
      db   1                 ;; Number of configurations

DeviceQualDscr:
      db   DSCR_DEVQUAL_LEN  ;; Descriptor length
      db   DSCR_DEVQUAL      ;; Decriptor type
      dw   1001H             ;; Specification Version (BCD)
      db   0FFH              ;; Device class
      db   0FFH              ;; Device sub-class
      db   0FFH              ;; Device sub-sub-class
      db   40H               ;; Maximum packet size
      db   1                 ;; Number of configurations
      db   0                 ;; Reserved

HighSpeedConfigDscr:   
      db   DSCR_CONFIG_LEN   ;; Descriptor length
      db   DSCR_CONFIG       ;; Descriptor type
      db   (HighSpeedConfigDscrEnd-HighSpeedConfigDscr) mod 256 ;; Total Length (LSB)
      db   (HighSpeedConfigDscrEnd-HighSpeedConfigDscr)  /  256 ;; Total Length (MSB)
      db   1                 ;; Number of interfaces
      db   1                 ;; Configuration number
      db   0                 ;; Configuration string
      db   10000000b         ;; Attributes (b7 - buspwr, b6 - selfpwr, b5 - rwu)
      db   75                ;; Power requirement (div 2 ma)

;; Interface Descriptor
      db   DSCR_INTRFC_LEN   ;; Descriptor length
      db   DSCR_INTRFC       ;; Descriptor type
      db   0                 ;; Zero-based index of this interface
      db   0                 ;; Alternate setting
      db   2                 ;; Number of end points 
      db   0FFH              ;; Interface class
      db   0FFH              ;; Interface sub class
      db   0FFH              ;; Interface sub sub class
      db   2                 ;; Interface descriptor string index
      
;; Endpoint Descriptor
      db   DSCR_ENDPNT_LEN   ;; Descriptor length
      db   DSCR_ENDPNT       ;; Descriptor type
      db   81H               ;; Endpoint number, and direction
      db   ET_BULK           ;; Endpoint type
      db   40H               ;; Maximum packet size (LSB)
      db   00H               ;; Max packect size (MSB)
      db   00H               ;; Polling interval

;; Endpoint Descriptor
      db   DSCR_ENDPNT_LEN   ;; Descriptor length
      db   DSCR_ENDPNT       ;; Descriptor type
      db   02H               ;; Endpoint number, and direction
      db   ET_BULK           ;; Endpoint type
      db   40H               ;; Maximum packet size (LSB)
      db   00H               ;; Max packect size (MSB)
      db   00H               ;; Polling interval
HighSpeedConfigDscrEnd:   

FullSpeedConfigDscr:   
      db   DSCR_CONFIG_LEN   ;; Descriptor length
      db   DSCR_CONFIG       ;; Descriptor type
      db   (FullSpeedConfigDscrEnd-FullSpeedConfigDscr) mod 256 ;; Total Length (LSB)
      db   (FullSpeedConfigDscrEnd-FullSpeedConfigDscr)  /  256 ;; Total Length (MSB)
      db   1                 ;; Number of interfaces
      db   1                 ;; Configuration number
      db   0                 ;; Configuration string
      db   10000000b         ;; Attributes (b7 - buspwr, b6 - selfpwr, b5 - rwu)
      db   75                ;; Power requirement (div 2 ma)

;; Interface Descriptor
      db   DSCR_INTRFC_LEN   ;; Descriptor length
      db   DSCR_INTRFC       ;; Descriptor type
      db   0                 ;; Zero-based index of this interface
      db   0                 ;; Alternate setting
      db   2                 ;; Number of end points 
      db   0FFH              ;; Interface class
      db   0FFH              ;; Interface sub class
      db   0FFH              ;; Interface sub sub class
      db   2                 ;; Interface descriptor string index
      
;; Endpoint Descriptor
      db   DSCR_ENDPNT_LEN   ;; Descriptor length
      db   DSCR_ENDPNT       ;; Descriptor type
      db   81H               ;; Endpoint number, and direction
      db   ET_BULK           ;; Endpoint type
      db   40H               ;; Maximum packet size (LSB)
      db   00H               ;; Max packect size (MSB)
      db   00H               ;; Polling interval

;; Endpoint Descriptor
      db   DSCR_ENDPNT_LEN   ;; Descriptor length
      db   DSCR_ENDPNT       ;; Descriptor type
      db   02H               ;; Endpoint number, and direction
      db   ET_BULK           ;; Endpoint type
      db   40H               ;; Maximum packet size (LSB)
      db   00H               ;; Max packect size (MSB)
      db   00H               ;; Polling interval
FullSpeedConfigDscrEnd:   

StringDscr:

StringDscr0:   
      db   StringDscr0End-StringDscr0      ;; String descriptor length
      db   DSCR_STRING
      db   09H,04H
StringDscr0End:

StringDscr1:   
      db   StringDscr1End-StringDscr1      ;; String descriptor length
      db   DSCR_STRING
      db   'i',00
      db   'x',00
      db   'o',00
      db   '.',00
      db   'd',00
      db   'e',00
StringDscr1End:

StringDscr2:   
      db   StringDscr2End-StringDscr2      ;; Descriptor length
      db   DSCR_STRING
      db   'U',00
      db   'S',00
      db   'B',00
      db   '-',00
      db   'J',00
      db   'T',00
      db   'A',00
      db   'G',00
      db   '-',00
      db   'I',00
      db   'F',00
StringDscr2End:

;; Serial number

StringDscr3:   
      db   StringDscr3End-StringDscr3      ;; Descriptor length
      db   DSCR_STRING

      db '0',0
      db '0',0
      db '0',0
      db '0',0
      db '0',0
      db '0',0
      db '0',0
      db '0',0

StringDscr3End:

UserDscr:      
      dw   0000H
      end