m8.s

avr_mega8对普通i/o按键的识别与判断

	.module m8.c
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\luning\桌面\anjian\m8.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 9
; //ICC-AVR application builder : 2007-8-8 10:33:08
; // Target : M8
; // Crystal: 8.0000Mhz
; 
; #include <iom8v.h>
; #include <macros.h>
; 
; void port_init(void)
; {
	.dbline 10
;  PORTB = 0x00;
	clr R2
	out 0x18,R2
	.dbline 11
;  DDRB  = 0x00;
	out 0x17,R2
	.dbline 12
;  PORTC = 0x00; //m103 output only
	out 0x15,R2
	.dbline 13
;  DDRC  = 0x00;
	out 0x14,R2
	.dbline 14
;  PORTD = 0x00;
	out 0x12,R2
	.dbline 15
;  DDRD  = 0x00;
	out 0x11,R2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 20
; }
; 
; //call this routine to initialize all peripherals
; void init_devices(void)
; {
	.dbline 22
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 23
;  port_init();
	rcall _port_init
	.dbline 25
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 26
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 27
;  TIMSK = 0x00; //timer interrupt sources
	out 0x39,R2
	.dbline 28
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 33
;  //all peripherals are now initialized
; }
; 
; void main()
; {
	.dbline 34
;  init_devices();
	rcall _init_devices
	.dbline 35
;  DDRC=0XFF;
	ldi R24,255
	out 0x14,R24
	.dbline 36
;  PORTC=0XF0;
	ldi R24,240
	out 0x15,R24
	.dbline 37
;  DDRB=0XFF;
	ldi R24,255
	out 0x17,R24
	.dbline 38
;  PORTB=0XFF;
	out 0x18,R24
	rjmp L5
L4:
	.dbline 40
;  while(1)
;  {
	.dbline 42
;  //;
;  DDRB=0;			         //按下拉低
	clr R2
	out 0x17,R2
	.dbline 43
;  if(!(PINB&0X01)) PORTC=0X0F;
	sbic 0x16,0
	rjmp L7
	.dbline 43
	ldi R24,15
	out 0x15,R24
L7:
	.dbline 44
;  if(!(PINB&0X02)) PORTC=0X00;
	sbic 0x16,1
	rjmp L9
	.dbline 44
	clr R2
	out 0x15,R2
L9:
	.dbline 45
L5:
	.dbline 39
	rjmp L4
X0:
	.dbline -2
L3:
	.dbline 0 ; func end
	ret
	.dbend