main.s

一个关于AVR单片机的例程

	.module main.c
	.area text(rom, con, rel)
	.dbfile D:\桌面\教程\外部中断\main.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 20
; //ICC-AVR application builder : 2007-2-17 7:56:49
; // Target : M16
; // Crystal: 7.3728Mhz
; // www.avrvi.com AVR与虚拟仪器
; 
; // 硬件连接：
; // PA0—————LED0
; // PA1—————LED1
; // PD2—————独立按键A
; // PD3—————独立按键B
; 
; // 实验效果：
; // 按A时，LED0亮与灭交替变换
; // 按B时，LED1亮与灭交替变换
; 
; #include <iom16v.h>
; #include <macros.h>
; 
; void port_init(void)
; {
	.dbline 21
;  PORTA = 0x00;
	clr R2
	out 0x1b,R2
	.dbline 22
;  DDRA  = 0x03; //PORTA.0 PORTA.1 输出，LED指示
	ldi R24,3
	out 0x1a,R24
	.dbline 23
;  PORTB = 0x00;
	out 0x18,R2
	.dbline 24
;  DDRB  = 0x00;
	out 0x17,R2
	.dbline 25
;  PORTC = 0x00; //m103 output only
	out 0x15,R2
	.dbline 26
;  DDRC  = 0x00;
	out 0x14,R2
	.dbline 27
;  PORTD |= (1<<2)|(1<<3); //使能内部上拉
	in R24,0x12
	ori R24,12
	out 0x12,R24
	.dbline 28
;  DDRD = 0x00; //PD2,PD3 对应INT0，INT1 一定要设置为输入
	out 0x11,R2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 4
	jmp _int0_isr
	.area text(rom, con, rel)
	.dbfile D:\桌面\教程\外部中断\main.c
	.dbfunc e int0_isr _int0_isr fV
	.even
_int0_isr::
	st -y,R2
	st -y,R24
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 33
; }
; 
; #pragma interrupt_handler int0_isr:2
; void int0_isr(void)
; {
	.dbline 35
;  //external interupt on INT0
;  PORTA ^= 0x01;  //PA0取反
	ldi R24,1
	in R2,0x1b
	eor R2,R24
	out 0x1b,R2
	.dbline -2
L2:
	ld R2,y+
	out 0x3f,R2
	ld R24,y+
	ld R2,y+
	.dbline 0 ; func end
	reti
	.dbend
	.area vector(rom, abs)
	.org 8
	jmp _int1_isr
	.area text(rom, con, rel)
	.dbfile D:\桌面\教程\外部中断\main.c
	.dbfunc e int1_isr _int1_isr fV
	.even
_int1_isr::
	st -y,R2
	st -y,R24
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 40
; }
; 
; #pragma interrupt_handler int1_isr:3
; void int1_isr(void)
; {
	.dbline 42
;  //external interupt on INT1
;  PORTA ^= 0x02;  //PA1取反
	ldi R24,2
	in R2,0x1b
	eor R2,R24
	out 0x1b,R2
	.dbline -2
L3:
	ld R2,y+
	out 0x3f,R2
	ld R24,y+
	ld R2,y+
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 47
; }
; 
; //call this routine to initialize all peripherals
; void init_devices(void)
; {
	.dbline 49
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 50
;  port_init();
	xcall _port_init
	.dbline 52
; 
;  MCUCR = 0x0A; //允许INT0和INT1外部中断
	ldi R24,10
	out 0x35,R24
	.dbline 53
;  GICR  = 0xC0;
	ldi R24,192
	out 0x3b,R24
	.dbline 54
;  TIMSK = 0x00; //timer interrupt sources
	clr R2
	out 0x39,R2
	.dbline 55
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
L4:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 60
;  //all peripherals are now initialized
; }
; 
; void main(void)
; {
	.dbline 61
;  init_devices();
	xcall _init_devices
L6:
	.dbline 63
L7:
	.dbline 62
	xjmp L6
X0:
	.dbline -2
L5:
	.dbline 0 ; func end
	ret
	.dbend