Cypress CY3640 USB Starter Kit
User’s Guide
Cypress Semiconductor Ver 0.993
Page 28
; Descriptor pointer
mov a,(USBStringDescription1 -USBSendROMBufferBase)
mov [gbUSBSendBuffer],a
; Descriptor size
mov a,10h ;[USBStringDescription1]
mov [gbUSBSendBytes],a
; Check request size field
call USBSendDescriptorCheckLength
; Send buffer
call USBSendROMBuffer
jmp USBEventEP0End
USBEventEP0SetupGetDescriptorString2:
cmp a,2
jnz USBEventEP0SetupGetDescriptorString3 ; No
;*********************************************
; Get String 2 Descriptor Event
;*********************************************
; Descriptor pointer
mov a,(USBStringDescription2 -USBSendROMBufferBase)
mov [gbUSBSendBuffer],a
; Descriptor size
mov a,18h ;[USBStringDescription2]
mov [gbUSBSendBytes],a
; Check request size field
call USBSendDescriptorCheckLength
; Send buffer
call USBSendROMBuffer
jmp USBEventEP0End
USBEventEP0SetupGetDescriptorString3:
cmp a,3
jnz USBEventEP0SetupGetDescriptorString4 ; No
;*********************************************
; Get String 3 Descriptor Event
;*********************************************
; Descriptor pointer
mov a,(USBStringDescription3 -USBSendROMBufferBase)
mov [gbUSBSendBuffer],a
; Descriptor size
mov a,24h ;[USBStringDescription3]
mov [gbUSBSendBytes],a
; Check request size field
call USBSendDescriptorCheckLength
; Send buffer
call USBSendROMBuffer
jmp USBEventEP0End
USBEventEP0SetupGetDescriptorString4:
cmp a,4
jnz USBEventEP0SetupGetDescriptorString5 ; No
;*********************************************
; Get String 4 Descriptor Event
;*********************************************
; Descriptor pointer
mov a,(USBStringDescription4 -USBSendROMBufferBase)
mov [gbUSBSendBuffer],a
; Descriptor size
