串口通信.s

AVR之ATMega16

	.module _串口通信.c
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\Administrator\桌面\精雅系列单片机实验开发板演示程序\串口通信/delay.h
	.dbfunc e DelayUS _DelayUS fV
;           time -> R16,R17
	.even
_DelayUS::
	.dbline -1
	.dbline 9
; //内部晶振 8M
; #include <ioM16v.h>
; #include <macros.h>
; #include"delay.h"
; 
; 
; 
; /*------宏定义------*/
; #define uchar	unsigned char
	xjmp L3
L2:
	.dbline 11
	subi R16,1
	sbci R17,0
L3:
	.dbline 10
; #define uint	unsigned int
	ldi R24,1
	ldi R25,0
	cp R24,R16
	cpc R25,R17
	brlo L2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r time 16 i
	.dbend
	.dbfunc e DelayMS _DelayMS fV
;              i -> R20,R21
;           time -> R16,R17
	.even
_DelayMS::
	xcall push_gset1
	.dbline -1
	.dbline 20
; 
; 
; 
; //端口初始化
; void port_init(void)
; {
;  PORTA = 0x00;//设置端口方向、数据
;  DDRA  = 0x00;
;  PORTB = 0x00;
;  DDRB  = 0x00;
	xjmp L7
L6:
	.dbline 23
;  PORTC = 0x00;
;  DDRC  = 0x00;
;  PORTD = 0x00;
	.dbline 24
;  DDRD  = 0x03;
	ldi R20,1
	ldi R21,0
	xjmp L12
L9:
	.dbline 25
L10:
	.dbline 24
	subi R20,255  ; offset = 1
	sbci R21,255
L12:
	.dbline 24
	cpi R20,118
	ldi R30,4
	cpc R21,R30
	brlo L9
	.dbline 26
L7:
	.dbline 22
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L6
	tst R3
	brne L6
X0:
	.dbline -2
L5:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r time 16 i
	.dbend
	.dbfile C:\DOCUME~1\Administrator\桌面\精雅系列单片机实验开发板演示程序\串口通信\串口通信.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 16
	.dbline 17
	clr R2
	out 0x1b,R2
	.dbline 18
	out 0x1a,R2
	.dbline 19
	out 0x18,R2
	.dbline 20
	out 0x17,R2
	.dbline 21
	out 0x15,R2
	.dbline 22
	out 0x14,R2
	.dbline 23
	out 0x12,R2
	.dbline 24
	ldi R24,3
	out 0x11,R24
	.dbline -2
L13:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e usart_init _usart_init fV
	.even
_usart_init::
	.dbline -1
	.dbline 30
; }
; 
; 
; //串口通信初始化
; void usart_init(void)
; {
	.dbline 31
;  UCSRB = 0x00;//禁止中断
	clr R2
	out 0xa,R2
	.dbline 32
;  UCSRA = 0x00;//数据发送、接受位、数据帧错误、奇偶校验、溢出、多机模式
	out 0xb,R2
	.dbline 33
;  UCSRC = BIT(URSEL) | 0x06;//使用UBRRH寄存器、数据位数8位
	ldi R24,134
	out 0x20,R24
	.dbline 34
;  UBRRL = 0x19;//设置波特率
	ldi R24,25
	out 0x9,R24
	.dbline 35
;  UBRRH = 0x00;
	out 0x20,R2
	.dbline 36
;  UCSRB = 0x98;//接受中断使能、接受、发送使能、不使用第9数据位
	ldi R24,152
	out 0xa,R24
	.dbline -2
L14:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart_putchar _uart_putchar fV
;              x -> R16
	.even
_uart_putchar::
	.dbline -1
	.dbline 39
; }
; void uart_putchar(char x)
; {
L16:
	.dbline 41
L17:
	.dbline 40
;  	 while (!(UCSRA&0x20))//查询发送区是否为空
	sbis 0xb,5
	rjmp L16
	.dbline 42
; 	 ;
; 	 UDR=x; //发送数据 
	out 0xc,R16
	.dbline -2
L15:
	.dbline 0 ; func end
	ret
	.dbsym r x 16 c
	.dbend
	.area vector(rom, abs)
	.org 44
	jmp _usart_rx_isr
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\Administrator\桌面\精雅系列单片机实验开发板演示程序\串口通信\串口通信.c
	.dbfunc e usart_rx_isr _usart_rx_isr fV
;              y -> R20
	.even
_usart_rx_isr::
	xcall push_lset
	xcall push_gset1
	.dbline -1
	.dbline 48
; }
; 
; //串行接收结束中断服务程序
; #pragma interrupt_handler usart_rx_isr:12
; void usart_rx_isr(void)
; {
	.dbline 50
;  	 char y;
; 	 y=UDR;
	in R20,0xc
	.dbline 51
; 	 uart_putchar(y);//把接收到的数据返回给上位机
	mov R16,R20
	xcall _uart_putchar
	.dbline -2
L19:
	xcall pop_gset1
	xcall pop_lset
	.dbline 0 ; func end
	reti
	.dbsym r y 20 c
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 56
; }
; 
; 
; void init_devices(void)
; {
	.dbline 57
;  CLI(); //禁止所有中断
	cli
	.dbline 58
;  MCUCR  = 0x00;//INT0、INT1中断触发方式
	clr R2
	out 0x35,R2
	.dbline 59
;  MCUCSR = 0x80;//禁止JTAG
	ldi R24,128
	out 0x34,R24
	.dbline 60
;  GICR   = 0x00;//外部中断使能
	out 0x3b,R2
	.dbline 61
;  port_init();
	xcall _port_init
	.dbline 62
;  usart_init();
	xcall _usart_init
	.dbline 63
;  SEI();//开全局中断
	sei
	.dbline -2
L20:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 67
; }
; //主函数
; void main(void)
; {
	.dbline 68
;  init_devices();
	xcall _init_devices
	xjmp L23
L22:
	.dbline 71
	.dbline 72
	nop
	.dbline 73
L23:
	.dbline 70
	xjmp L22
X1:
	.dbline -2
L21:
	.dbline 0 ; func end
	ret
	.dbend