main.s

单片机中的中断处理模块

	.module main.c
	.area text(rom, con, rel)
	.dbfile F:\芯生光盘资料\范例代码\Interrupt\main.c
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 16
; //ICC-AVR application builder : 2007-8-13 15:05:41
; // Target : M128
; // Crystal: 7.3728Mhz
; 
; #include <iom128v.h>
; #include <macros.h>
; #include "port.h"
; #include "led.h"
; #include "stdtypes.h"
; 
; UNS8 counter;
; 
; 
; /*call this routine to initialize all peripherals */
; void main(void)
; {
	.dbline 18
;   //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 19
;  XDIV  = 0x00; //xtal divider
	clr R2
	out 0x3c,R2
	.dbline 20
;  XMCRA = 0x00; //external memory
	sts 109,R2
	.dbline 21
;  port_init();
	xcall _port_init
	.dbline 22
;  led_init(); //7段数码管显示
	xcall _led_init
	.dbline 24
;  
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 25
;  EICRA = 0x00; //extended ext ints
	sts 106,R2
	.dbline 26
;  EICRB = 0x00; //extended ext ints
	out 0x3a,R2
	.dbline 27
;  EIMSK = 0x01;
	ldi R24,1
	out 0x39,R24
	.dbline 28
;  TIMSK = 0x00; //timer interrupt sources
	out 0x37,R2
	.dbline 29
;  ETIMSK = 0x00; //extended timer interrupt sources
	sts 125,R2
	.dbline 31
;  
;   counter=0;
	sts _counter,R2
	.dbline 34
; 
;   
;  SEI(); //re-enable interrupts
	sei
	.dbline 38
;  //all peripherals are now initialized
; 
; 	 
; for(;;)
L2:
	.dbline 39
	.dbline 40
	clr R18
	lds R16,_counter
	clr R17
	xcall _display
	.dbline 42
	.dbline 38
	.dbline 38
	xjmp L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 4
	jmp _int0_isr
	.area text(rom, con, rel)
	.dbfile F:\芯生光盘资料\范例代码\Interrupt\main.c
	.dbfunc e int0_isr _int0_isr fV
	.even
_int0_isr::
	st -y,R2
	st -y,R24
	st -y,R25
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 47
	.dbline 50
	lds R24,_counter
	subi R24,255    ; addi 1
	sts _counter,R24
	.dbline 51
	cpi R24,255
	brne L7
	.dbline 52
	.dbline 53
	clr R2
	sts _counter,R2
	.dbline 54
L7:
	.dbline -2
L6:
	ld R2,y+
	out 0x3f,R2
	ld R25,y+
	ld R24,y+
	ld R2,y+
	.dbline 0 ; func end
	reti
	.dbend
	.area bss(ram, con, rel)
	.dbfile F:\芯生光盘资料\范例代码\Interrupt\main.c
_counter::
	.blkb 1
	.dbsym e counter _counter c