tc.s

avr atmega168v Timer counter的程序

	.module tc.c
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
	.dbfile G:\燕洪成\gra_des\exper\inc\myfun.h
	.dbfunc e Delayus _Delayus fV
;           time -> R16,R17
	.even
_Delayus::
	.dbline -1
	.dbline 4
; #define uchar unsigned char
; //******DelayTime*******//	 
; void Delayus(int time)
; {     
L2:
	.dbline 6
;  do
;       time--;
	subi R16,1
	sbci R17,0
L3:
	.dbline 7
;  while(time>1);
	ldi R24,1
	ldi R25,0
	cp R24,R16
	cpc R25,R17
	brlt L2
X0:
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r time 16 I
	.dbend
	.dbfunc e Delayms _Delayms fV
;           time -> R20,R21
	.even
_Delayms::
	st -y,R20
	st -y,R21
	movw R20,R16
	.dbline -1
	.dbline 10
; }	  
; void Delayms(unsigned int time)
; {
	xjmp L7
L6:
	.dbline 12
;  while(time!=0)
; 	  {		
	.dbline 13
; 	   Delayus(1000);
	ldi R16,1000
	ldi R17,3
	xcall _Delayus
	.dbline 14
; 	   time--;
	subi R20,1
	sbci R21,0
	.dbline 15
; 	  }
L7:
	.dbline 11
	cpi R20,0
	cpc R20,R21
	brne L6
X1:
	.dbline -2
L5:
	.dbline 0 ; func end
	ld R21,y+
	ld R20,y+
	ret
	.dbsym r time 20 i
	.dbend
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
	.dbfunc e PORT_Init _PORT_Init fV
	.even
_PORT_Init::
	.dbline -1
	.dbline 14
; // **************************************************************
; // ***         实验：       Timer/Counter                     ***
; // ***                       2007年10月13日                   ***
; // ***         目标MCU:MEGA168v     晶振：内部  8MHZ          ***
; // ***         fuse_config:CLKDIV8 disabled                   ***
; // **************************************************************
; //set_bit:PORTD |=(1<<PORTD3);
; //clr_bit:PORTD &=~(1<<PORTD3);
; #include<iom168v.h>
; #include<macros.h>
; #include<myfun.h>
; 
; void PORT_Init(void)
; {
	.dbline 15
;  DDRD = 0xFF;
	ldi R24,255
	out 0xa,R24
	.dbline -2
L9:
	.dbline 0 ; func end
	ret
	.dbend
	.area data(ram, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
_counter::
	.blkb 2
	.area idata
	.word 0
	.area data(ram, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
	.dbsym e counter _counter i
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
	.dbfunc e timer0_init _timer0_init fV
	.even
_timer0_init::
	.dbline -1
	.dbline 25
; }
; //*************************************************//
; //*******************   TC   **********************//
; //*************************************************//
; unsigned int counter=0;
; //prescale:8;WGM: Normal;
; //desired value: 5KHz
; //actual value:  5.009KHz (0.2%)
; void timer0_init(void)
; {
	.dbline 26
;  TCCR0B = 0x00; //stop
	clr R2
	out 0x25,R2
	.dbline 27
;  TCNT0 = 0x10; //set count
	ldi R24,16
	out 0x26,R24
	.dbline 28
;  TCCR0A = 0x00;
	out 0x24,R2
	.dbline 29
;  TIMSK0 = 0x01; //enable timer overflow interrupt
	ldi R24,1
	sts 110,R24
	.dbline 30
;  TCCR0B = 0x02; //start timer
	ldi R24,2
	out 0x25,R24
	.dbline -2
L10:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 64
	jmp _timer0_ovf_isr
	.area text(rom, con, rel)
	.dbfile G:\燕洪成\gra_des\exper\tc\tc.c
	.dbfunc e timer0_ovf_isr _timer0_ovf_isr fV
	.even
_timer0_ovf_isr::
	st -y,R2
	st -y,R3
	st -y,R24
	st -y,R25
	st -y,R30
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 34
; }
; #pragma interrupt_handler timer0_ovf_isr:17
; void timer0_ovf_isr(void)
; {
	.dbline 35
;  TCNT0 = 0x10; //set count
	ldi R24,16
	out 0x26,R24
	.dbline 36
;  counter++;
	lds R24,_counter
	lds R25,_counter+1
	adiw R24,1
	sts _counter+1,R25
	sts _counter,R24
	.dbline 37
;  if(counter == 4000)
	cpi R24,160
	ldi R30,15
	cpc R25,R30
	brne L12
X2:
	.dbline 38
; 	  PORTD |= (1<<PORTD3);
	sbi 0xb,3
L12:
	.dbline 39
;  if(counter == 8000)
	lds R24,_counter
	lds R25,_counter+1
	cpi R24,64
	ldi R30,31
	cpc R25,R30
	brne L14
X3:
	.dbline 40
;       {
	.dbline 41
; 	   counter = 0;
	clr R2
	clr R3
	sts _counter+1,R3
	sts _counter,R2
	.dbline 42
; 	   PORTD &= ~(1<<PORTD3);
	cbi 0xb,3
	.dbline 43
; 	  }
L14:
	.dbline -2
L11:
	.dbline 0 ; func end
	ld R2,y+
	out 0x3f,R2
	ld R30,y+
	ld R25,y+
	ld R24,y+
	ld R3,y+
	ld R2,y+
	reti
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 49
; }
; //*************************************************//
; //****************** TC_over **********************//
; //*************************************************//
; void main(void)
; {
	.dbline 50
;  CLI();
	cli
	.dbline 51
;  PORT_Init();
	xcall _PORT_Init
	.dbline 52
;  timer0_init();
	xcall _timer0_init
	.dbline 53
;  SEI();
	sei
L17:
	.dbline 55
; 
;  while(1) ;
L18:
	.dbline 55
	xjmp L17
X4:
	.dbline -2
L16:
	.dbline 0 ; func end
	ret
	.dbend
; }