sn8_usb_ep2.asm

Sonix新出的MCU SN8F2255的USB的HID库。

;***********************************************************************
;	USB Endpoint 2 function 
;=======================================================================
;This file is for Endpoint 2.
;EP2 FIFO address 0x18 ~ 0x27
;***********************************************************************
EP2_FUNCTION:	

WRITE_EP2:

		EP2_WR_RAM_addr_set #0x18	;ep2 FIFO address
		EP2_WR_RAM_data	#0x0	
		EP2_WR_RAM_addr_set #0x19	;FIFO address + 1
		EP2_WR_RAM_data	#0x0	
		EP2_WR_RAM_addr_set #0x1A
		EP2_WR_RAM_data	#0x0
		EP2_WR_RAM_addr_set #0x1B
		EP2_WR_RAM_data	#0x0
		EP2_WR_RAM_addr_set #0x1C
		EP2_WR_RAM_data	#0x0

		mov	a, #0x0
		cmprs	a, HALT2
		jmp	_ep2_stall
		jmp	_ep2_normal

_ep2_normal:
		mov	a, #10100100b	;ACK
		b0mov	UE2R, a	
		;mov	a, #0x80	; Return NAK
		;b0mov	UE2R,a		
		ret

_ep2_stall:
		mov	a, #11000000b	;EP2 STALL					 
		b0mov	UE2R, a	
		ret


//==============================================================//
//		End of EP2 function				//
//==============================================================//