dscr.a51

The purpose of this code is to demonstrate how to utilize EZUSB FX GPIF interface.

;;-----------------------------------------------------------------------------
;;  File:    dscr.a51
;;  Contents:  This file contains descriptor data tables.  
;;
;;  Copyright (c) 2001 Cypress Semiconductor 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

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, ConfigDscr, StringDscr, UserDscr

DSCR  SEGMENT  CODE

;;-----------------------------------------------------------------------------
;; Global Variables
;;-----------------------------------------------------------------------------
;; Note: This segment must be located in on-part memory.
    rseg DSCR    ;; locate the descriptor table anywhere below 2000h
DeviceDscr:  
    db  deviceDscrEnd-DeviceDscr    ;; Descriptor length
    db  DSCR_DEVICE                 ;; Decriptor type
    dw  0001H                       ;; Specification Version (BCD)
    db  00H                         ;; Device class
    db  00H                         ;; Device sub-class
    db  00H                         ;; Device sub-sub-class
    db  64                          ;; Maximum packet size
    dw  4705H                       ;; Vendor ID
    dw  0210H                       ;; Product ID - set to default example ID
    dw  0100H                       ;; Product version ID
    db  0                           ;; Manufacturer string index
    db  0                           ;; Product string index
    db  0                           ;; Serial number string index
    db  1                           ;; Number of configurations
deviceDscrEnd:

ConfigDscr:  
    db  ConfigDscrEnd-ConfigDscr    ;; Descriptor length
    db  DSCR_CONFIG                 ;; Descriptor type
    db  StringDscr-ConfigDscr       ;; Configuration + End Points length (LSB)
    db  (StringDscr-ConfigDscr)/256 ;; Configuration + End Points length (MSB)
    db  1                           ;; Number of interfaces
    db  1                           ;; Interface number
    db  0                           ;; Configuration string
    db  10100000b         ;; Attributes (b7 - buspwr, b6 - selfpwr, b5 - rwu)
    db  0                 ;; Power requirement (div 2 ma)
ConfigDscrEnd:

IntrfcDscr:
    db  IntrfcDscrEnd-IntrfcDscr    ;; 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  00H                         ;; Interface sub class
    db  00H                         ;; Interface sub sub class
    db  0                           ;; Interface descriptor string index
IntrfcDscrEnd:
    
EpInDscr:
    db  EpInDscrEnd-EpInDscr        ;; Descriptor length
    db  DSCR_ENDPNT                 ;; Descriptor type
    db  82H                         ;; Endpoint number, and direction
    db  ET_BULK                     ;; Endpoint type
    db  40H                         ;; Maximun packet size (LSB)
    db  00H                         ;; Max packect size (MSB)
    db  00H                         ;; Polling interval
EpInDscrEnd:

EpOutDscr:
    db  EpOutDscrEnd-EpOutDscr      ;; Descriptor length
    db  DSCR_ENDPNT                 ;; Descriptor type
    db  02H                         ;; Endpoint number, and direction
    db  ET_BULK                     ;; Endpoint type
    db  40H                         ;; Maximun packet size (LSB)
    db  00H                         ;; Max packect size (MSB)
    db  00H                         ;; Polling interval
EpOutDscrEnd:

; note: you can have roughly 126 characters in each string below (unicode)

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	'G',00
		db	'P',00
		db	'I',00
		db	'F',00
		db	' ',00
		db	'M',00
		db	'O',00
		db	'D',00
		db	'E',00
		db	' ',00
		db	'A',00
		db	'F',00
		db	'I',00
		db	'F',00
		db	'O',00
		db	' ',00
		db	'8',00
		db	'-',00
		db	'B',00
		db	'I',00
		db	'T',00
		db	' ',00
		db	'A',00
		db	'S',00
		db	'Y',00
		db	'N',00
		db	'C',00
		db	' ',00
		db	'v',00
		db	'0',00
		db	'.',00
		db	'7',00
		db	'.',00
		db	'0',00
		db	'0',00
		db	'0',00
		db	'0',00
StringDscr1End:

StringDscr2:	
		db	StringDscr2End-StringDscr2		;; Descriptor length
		db	DSCR_STRING
		db	'E',00
		db	'Z',00
		db	'-',00
		db	'U',00
		db	'S',00
		db	'B',00
		db	' ',00
		db	'F',00
		db	'X',00
		db	' ',00
		db	'D',00
		db	'K',00
		db	' ',00
		db	'B',00
		db	'A',00
		db	'C',00
		db	'K',00
		db	'-',00
		db	'T',00
		db	'O',00
		db	'-',00
		db	'B',00
		db	'A',00
		db	'C',00
		db	'K',00
		db	' ',00
		db	'B',00
		db	'O',00
		db	'A',00
		db	'R',00
		db	'D',00
		db	'S',00
StringDscr2End:

UserDscr:    
    dw  0000H
    end