sn8_usb_ep2.asm

来自「sonix系列mcu USB库汇编代码,用于进行2250系列mcu」· 汇编 代码 · 共 36 行

;***********************************************************************
;	USB Endpoint 2 function 
;=======================================================================
;This file is for Endpoint 2.
;EP2 FIFO address 0x20 ~ 0x2F
;***********************************************************************
EP2_FUNCTION:	

WRITE_EP2:

		EP2_WR_RAM_addr_set #0x20	;ep1 FIFO address
		EP2_WR_RAM_data	#0x0	
		EP2_WR_RAM_addr_set #0x21	;FIFO address + 1
		EP2_WR_RAM_data	#0x0	
		EP2_WR_RAM_addr_set #0x22
		EP2_WR_RAM_data	#0X0
		EP2_WR_RAM_addr_set #0x23
		EP2_WR_RAM_data	#0x0
		EP2_WR_RAM_addr_set #0x24
		EP2_WR_RAM_data	#0x0


_ep2_normal:
		mov	a, #10100101b	;ACK
		b0mov	UE2R, a			
		ret

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


//==============================================================//
//		End of EP1 function				//
//==============================================================//