uart.s

我自己编写的atmega16的4*4键盘程序

	.module UART.C
	.area vector(rom, abs)
	.org 44
	jmp _USART_Recive_Complete_handler
	.org 48
	jmp _USART_Data_Register_Empty_handler
	.org 52
	jmp _USART_Transmit_Complete_handler
	.area text(rom, con, rel)
	.dbfile F:\自编程序\M16\4-4keyboard\UART.C
	.dbfunc e USART_Init _USART_Init fV
	.even
_USART_Init::
	.dbline -1
	.dbline 6
; #include <iom16v.h> 
; #pragma interrupt_handler	USART_Recive_Complete_handler:12
; #pragma interrupt_handler	USART_Data_Register_Empty_handler:13
; #pragma interrupt_handler	USART_Transmit_Complete_handler:14
; void USART_Init(void)
; {
	.dbline 14
;  //{{WIZARD_MAP(UART)
;     // crystal: 8M
; 	// Baud Rate: 9600
; 	// Character Size: 8-bit
; 	// Mode: Asynchronous
; 	// Parity: Disabled
; 	// Stop Bit: 1-bit
; 	UBRRL = 0x33;
	ldi R24,51
	out 0x9,R24
	.dbline 15
; 	UBRRH = 0x00;
	clr R2
	out 0x20,R2
	.dbline 16
; 	UCSRA = 0x00;
	out 0xb,R2
	.dbline 17
; 	UCSRC = 0x86;
	ldi R24,134
	out 0x20,R24
	.dbline 18
; 	UCSRB = 0x18;
	ldi R24,24
	out 0xa,R24
	.dbline -2
	.dbline 22
; 	//UCSRB|=0X80;//开接收结束中断
; 	//UCSRB|=0X40;//开发送结束中断
;     //UCSRB|=0X20;//开数据寄存器空中断
; }
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e USART_Transmit _USART_Transmit fV
;           data -> R16
	.even
_USART_Transmit::
	.dbline -1
	.dbline 24
; void USART_Transmit(unsigned char data)
; {
L3:
	.dbline 26
L4:
	.dbline 26
;    /* 等待发送缓冲器为空 */
;    while ( !( UCSRA & (1<<UDRE)) );
	sbis 0xb,5
	rjmp L3
	.dbline 28
;   /* 将数据放入缓冲器，发送数据 */
;   UDR = data;
	out 0xc,R16
	.dbline -2
	.dbline 29
; }
L2:
	.dbline 0 ; func end
	ret
	.dbsym r data 16 c
	.dbend
	.dbfunc e USART_Recive _USART_Recive fc
	.even
_USART_Recive::
	.dbline -1
	.dbline 31
; unsigned char USART_Recive(void)
; {
L7:
	.dbline 33
L8:
	.dbline 33
;  	/* 等待接收数据*/
; 	while ( !(UCSRA & (1<<RXC)) );
	sbis 0xb,7
	rjmp L7
	.dbline 35
; 	/* 从缓冲器中获取并返回数据*/
; 	return UDR;
	in R16,0xc
	.dbline -2
L6:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e USART_Recive_Complete_handler _USART_Recive_Complete_handler fV
	.even
_USART_Recive_Complete_handler::
	.dbline -1
	.dbline 38
; }
; void USART_Recive_Complete_handler(void)
; {
	.dbline -2
	.dbline 40
; 
; }
L10:
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e USART_Data_Register_Empty_handler _USART_Data_Register_Empty_handler fV
	.even
_USART_Data_Register_Empty_handler::
	.dbline -1
	.dbline 42
; void USART_Data_Register_Empty_handler(void)
; {
	.dbline -2
	.dbline 44
; 
; }void USART_Transmit_Complete_handler(void)
L11:
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e USART_Transmit_Complete_handler _USART_Transmit_Complete_handler fV
	.even
_USART_Transmit_Complete_handler::
	.dbline -1
	.dbline 45
; {
	.dbline -2
	.dbline 47
; 
; }
L12:
	.dbline 0 ; func end
	reti
	.dbend