mouse45.asm

USB大全电子版全部资料3~包含源码、协议等

                                        ; the RAM
        ret                             ; return


GetStringDescriptor:
	mov A, [wValue]
	cmp A, 0h
	jz LanguageString
	cmp A, 01h
	jz ManufacturerString
	cmp A, 02h
	jz ProductString
	cmp A, 03h
	jz SerialNumString
      cmp A, 04h
	jz ConfigurationString
      cmp A, 05h
	jz InterfaceString

; No other strings supported
      jmp SendStall   		; *** not supported ***
LanguageString:
	mov A, (USBStringDescription1 - USBStringLanguageDescription)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringLanguageDescription - control_read_table)
      jmp execute                     ; send the string descriptor
ManufacturerString:	
	mov A, ( USBStringDescription2 - USBStringDescription1)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringDescription1 - control_read_table)
      jmp execute                     ; send the string descriptor
ProductString:
	mov A, ( USBStringDescription3 - USBStringDescription2)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringDescription2 - control_read_table)
      jmp execute                     ; send the string descriptor
SerialNumString:
	mov A, ( USBStringDescription4 - USBStringDescription3)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringDescription3 - control_read_table)
      jmp execute                     ; send the string descriptor
ConfigurationString:
	mov A, ( USBStringDescription5 - USBStringDescription4)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringDescription4 - control_read_table)
      jmp execute
InterfaceString:
	mov A, ( USBStringEnd - USBStringDescription5)
      mov [data_count], A               ; save the descriptor length
	mov A, (USBStringDescription5 - control_read_table)
      jmp execute
	

;------------------------------------------------------------------------
; HID class Get Descriptor routines
;
; Return the HID descriptor and enable endpoint one.
GetHIDDescriptor:
	mov A, (end_config_desc_table - Class_Descriptor)
      mov [data_count], A             ; save descriptor length            

	mov A, ( Class_Descriptor - control_read_table)
      call execute                    ; send descriptor to host
      ret                             ; return

;**********USB library main routines*******************

;******************************************************
; The host sometimes lies about the number of bytes it
; wants from a descriptor.  Any request to get descriptor
; should return the lesser of the number of bytes requested
; or the actual length of the descriptor.
 
get_descriptor_length:
	mov A, [wLengthHi] 	; load requested transfer length
	cmp A, 0			; confirm high byte is zero
	jnz use_actual_length	; no requests should be longer than 256b
	mov A, [wLength]		; test low byte against zero
	cmp A, 0
	jz use_actual_length	; must request some data
	cmp A, [data_count]     ; compare to the amount of data
	jnc use_actual_length
	mov [data_count], A     ; use requested length
use_actual_length:
        ret                   ; return

;========================================================================
;	function: no_data_control
;	purpose: performs the no-data control operation
;		as defined by the USB specifications
no_data_control:
	mov A, C0h			; set up the transfer
	iowr USB_EP0_TX_Config	; register for data1
					; and 0 byte transfer

	mov A, [interrupt_mask]	; enable interrupts
	iowr Global_Interrupt

wait_nodata_sent:
	iord USB_EP0_TX_Config	; wait for the data to be
	and A, 80h			; transferred
	jnz wait_nodata_sent
	ret				; return to caller

;========================================================================

;******************************************************
;
;	function:  Control_read
;	Purpose:   Performs the control read operation
;		   as defined by the USB specification
;	SETUP-IN-IN-IN...OUT
;
;	data_start: must be set to the descriptors info
;		    as an offset from the beginning of the
;		    control read table
;		    data count holds the 
;	data_count: must be set to the size of the 
;		    descriptor 
;******************************************************

control_read: 
	push X				; save X on stack
	mov A, 00h				; clear data 0/1 bit
	mov [endp0_data_toggle], A

control_read_data_stage:
	mov X, 00h
	mov A, 00h
	mov [loop_counter], A
	iowr USB_EP0_RX_Status		; clear setup bit

; Fixing a bug seen by NEC hosts	
	iord USB_EP0_RX_Status		; check setup bit
	and A, 01h				; if not cleared, another setup
	jnz control_read_status_stage	; has arrived. Exit ISR
	mov A, 08h				; set BADOUTS BIT
	iowr USB_Status_Control
	mov A, [data_count]
	cmp A, 00h				; if the number of byte to transmit
	jz dma_load_done			; is a multiple of 8 we have to transmit 
						; a zero-byte data packet

dma_load_loop:				; loop to load data into the data buffer
	mov A, [data_start]
	index control_read_table
	mov [X + endpoint_0], A		; load dma buffer
	inc [data_start]
	inc X
	inc [loop_counter]
	dec [data_count]			; exit if descriptor
	jz dma_load_done			; is done
	mov A, [loop_counter]		; or 8 bytes sent
	cmp A, 08h
	jnz dma_load_loop

dma_load_done:

	iord USB_EP0_RX_Status		; check setup bit
	and A, 01h				; if not cleared, another setup
	jnz control_read_status_stage	; has arrived. Exit ISR
	mov A, [endp0_data_toggle]
	xor A, 40h
	mov [endp0_data_toggle], A
	or A, 80h
	or A, [loop_counter]
	iowr USB_EP0_TX_Config
	mov A, [interrupt_mask]
	iowr Global_Interrupt

wait_control_read:
	iord USB_EP0_TX_Config		; wait for the data to be
	and A, 80h				; transfered
	jz control_read_data_stage
	iord USB_EP0_RX_Status
	and A, 02h				; check if out was sent by host
	jz wait_control_read

control_read_status_stage:		; OUT at end of data transfer
	pop X					; restore X from stack
	mov A, [interrupt_mask]
	iowr Global_Interrupt
	ret

;========================================================================

;******************************************************
;
;	function:  Control_read2
;	Purpose:   Performs the control read operation. 
;		     Sends data from RAM
;	SETUP-IN-IN-IN...OUT
;
;	data_start: must be set to the beginning of the
;		    RAM buffer
;		    
;	data_count: must be set to the size of the 
;		      buffer 
;******************************************************

control_read2: 
	push X				; save X on stack
	mov A, 00h				; clear data 0/1 bit
	mov [endp0_data_toggle], A

control_read_data_stage2:
	mov X, 00h
	mov A, 00h
	mov [loop_counter], A
	iowr USB_EP0_RX_Status		; clear setup bit

; Fixing a bug seen by NEC hosts	
	iord USB_EP0_RX_Status		; check setup bit
	and A, 01h				; if not cleared, another setup
	jnz control_read_status_stage2	; has arrived. Exit ISR
	mov A, 08h				; set BADOUTS BIT
	iowr USB_Status_Control
      mov A, [data_count]
	cmp A, 00h				; if the number of byte to transmit
	jz dma_load_done2			; is a multiple of 8 we have to transmit 
						; a zero-byte data packet

dma_load_loop2:				; loop to load data into the data buffer
	push X
	mov X, [data_start]
	mov A,[X+0]
      pop X
	mov [X + endpoint_0], A		; load dma buffer
	inc [data_start]
	inc X
	inc [loop_counter]
	dec [data_count]			; exit if descriptor
	jz dma_load_done2			; is done
	mov A, [loop_counter]		; or 8 bytes sent
	cmp A, 08h
	jnz dma_load_loop2

dma_load_done2:

	iord USB_EP0_RX_Status		; check setup bit
	and A, 01h				; if not cleared, another setup
	jnz control_read_status_stage2	; has arrived. Exit ISR
	mov A, [endp0_data_toggle]
	xor A, 40h
	mov [endp0_data_toggle], A
	or A, 80h
	or A, [loop_counter]
	iowr USB_EP0_TX_Config
	mov A, [interrupt_mask]
	iowr Global_Interrupt

wait_control_read2:
	iord USB_EP0_TX_Config		; wait for the data to be
	and A, 80h				; transfered
	jz control_read_data_stage2
	iord USB_EP0_RX_Status
	and A, 02h				; check if out was sent by host
	jz wait_control_read2
control_read_status_stage2:		; OUT at end of data transfer
	pop X					; restore X from stack
	mov A, [interrupt_mask]
	iowr Global_Interrupt
	ret



;*********************************************************
;                   rom lookup tables
;*********************************************************

	XPAGEOFF
		
control_read_table:
   device_desc_table:
	db	12h		; size of descriptor (18 bytes)
	db	01h		; descriptor type (device descriptor)
	db	00h, 01h	; USB spec release (ver 1.0)
	db	00h		; class code (each interface specifies class information)
	db	00h		; device sub-class (must be set to 0 because class code is 0)
	db	00h		; device protocol (no class specific protocol)
	db	08h		; maximum packet size (8 bytes)
	db	B4h, 04h	; vendor ID (note Cypress vendor ID)
	db	01h, 00h	; product ID (Cypress USB mouse product ID)
	db	00h, 00h	; device release number
	db	01h		; index of manufacturer string 
	db	02h		; index of product string 
	db	00h		; index of serial number (0=none)
	db	01h		; number of configurations (1)

   config_desc_table:
	db	09h		; length of descriptor (9 bytes)
	db	02h		; descriptor type (CONFIGURATION)
	db	22h, 00h	; total length of descriptor (34 bytes)
	db	01h		; number of interfaces to configure (1)
	db	01h		; configuration value (1)
	db	04h		; configuration string index 
	db	A0h		; configuration attributes (bus powered)
	db	32h		; maximum power (100mA)

   Interface_Descriptor:
	db	09h		; length of descriptor (9 bytes)
	db	04h		; descriptor type (INTERFACE)
	db	00h		; interface number (0)
	db	00h		; alternate setting (0)
	db	01h		; number of endpoints (1)
	db	03h		; interface class (3..defined by USB spec)
	db	01h		; interface sub-class (1..defined by USB spec)
	db	02h		; interface protocol (2..defined by USB spec)
	db	05h		; interface string index 

   Endpoint_Descriptor:
	db	07h		; descriptor length (7 bytes)
	db	05h		; descriptor type (ENDPOINT)
	db	81h		; endpoint address (IN endpoint, endpoint 1)
	db	03h		; endpoint attributes (interrupt)
	db	03h, 00h	; maximum packet size (3 bytes)
	db	0Ah		; polling interval (10ms)

   Class_Descriptor:
	db	09h		; descriptor size (9 bytes)
	db	21h		; descriptor type (HID)
	db	00h,01h		; HID class release number (1.00)
	db	00h		; Localized country code (none)
	db	01h		; # of HID class descriptor to follow (1)
	db	22h		; Report descriptor type (HID)
	db	(end_hid_report_desc_table - hid_report_desc_table)
	db	00h

   end_config_desc_table:

   hid_report_desc_table:
	db	05h, 01h	; usage page (generic desktop)
	db	09h, 02h	; usage (mouse)
	db	A1h, 01h	; collection (application)
	db	09h, 01h	; usage (pointer)
	db	A1h, 00h	; collection (linked)
	db	05h, 09h	; usage page (buttons)
	db	19h, 01h	; usage minimum (1)
	db	29h, 03h	; usage maximum (3)
	db	15h, 00h	; logical minimum (0)
	db	25h, 01h	; logical maximum (1)
	db	95h, 03h	; report count (3 bytes)
	db	75h, 01h	; report size (1)
	db	81h, 02h	; input (3 button bits)
	db	95h, 01h	; report count (1)
	db	75h, 05h	; report size (5)
	db	81h, 01h	; input (constant 5 bit padding)
	db	05h,