timer.s

sunplus spca514 cdmp3 源码

	.module timer.c
	.area text(rom, con, rel)
	.dbfile D:\avrmcu\AT980\timer.c
	.dbfunc s init_timer _init_timer fI
	.even
_init_timer::
	.dbline -1
	.dbline 8
; #include "iom163.h"
; #include "timer.h"
; #include "main.h"
; //unsigned int CntHigh=0;
; extern unsigned char tick_flag,tape_rotate_cnt;
; /* clk/8 1us 8MHZ*/
; void init_timer(void)
; {
	.dbline 14
;  	 	//
; 		//TCCR0= 0x00; //stop
;  		//TCNT0= 254; //set count
;  		//TCCR0= 0x06; //start timer: EXTERN FALLING
; 		
; 		TCCR2= 0x00; //stop 
	clr R2
	out 0x25,R2
	.dbline 15
;  		ASSR= 0x00; 
	out 0x22,R2
	.dbline 16
;  		TCNT2= CNT0VALUE; //setup
	ldi R24,100
	out 0x24,R24
	.dbline 18
;  		//OCR2= 0x9C; //set compare value
;  		TCCR2= 0x07; //start
	ldi R24,7
	out 0x25,R24
	.dbline 21
; 
; 		
; 		TCCR1B= 0x00; //stop
	out 0x2e,R2
	.dbline 22
; 		TCCR1A= 0x00;//com1x1\com1x0:disconnect from output pin
	out 0x2f,R2
	.dbline 26
; 			   	 	  //FOC1A\FOC1B:0\0
; 					  //PWM10\PWM11:0\0 DISABLE
; 		
;         TCNT1H = 0; //
	out 0x2d,R2
	.dbline 27
;         TCNT1L = 0; //
	out 0x2c,R2
	.dbline 33
; 		
;        // OCR1AH = 0x27;
;        // OCR1AL = 0x10;
;        // OCR1BH = 0x27;
;        // OCR1BL = 0x10;
; 		TIMSK |= 0x61;  // TIMER0 OVERFLOW INTERRUPT/TIMER1 CAPTUER
	in R24,0x39
	ori R24,97
	out 0x39,R24
	.dbline 34
;         TCCR1B = 0x82; // CK/8 8MHZ 1uS
	ldi R24,130
	out 0x2e,R24
	.dbline -2
	.dbline 36
; 		
; }
L1:
	.dbline 0 ; func end
	ret
	.area vector(rom, abs)
	.org 16
	jmp _timer2_ovf_isr
	.area text(rom, con, rel)
	.dbfile D:\avrmcu\AT980\timer.c
	.area data(ram, con, rel)
	.dbfile D:\avrmcu\AT980\timer.c
L3:
	.blkb 1
	.area idata
	.byte 0
	.area data(ram, con, rel)
	.dbfile D:\avrmcu\AT980\timer.c
	.area text(rom, con, rel)
	.dbfile D:\avrmcu\AT980\timer.c
	.dbfunc s timer2_ovf_isr _timer2_ovf_isr fI
	.dbsym s tick_counter L3 c
	.even
_timer2_ovf_isr::
	st -y,R2
	st -y,R24
	st -y,R25
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 47
	.dbline 50
	ldi R24,100
	out 0x24,R24
	.dbline 52
	ldi R24,1
	sts _tick_flag,R24
	.dbline 53
	lds R24,L3
	subi R24,255	; addi 1
	sts L3,R24
	.dbline 56
	ldi R24,9
	lds R2,L3
	cp R24,R2
	brsh L4
	.dbline 57
	.dbline 58
	clr R2
	sts L3,R2
	.dbline 59
	lds R24,_tick_flag
	ori R24,2
	sts _tick_flag,R24
	.dbline 60
L4:
	.dbline -2
	.dbline 62
; 
; //#pragma interrupt_handler timer0_ovf_isr:10
; //void timer0_ovf_isr(void)
; //{
;  // TCNT0 = 254;
;   //tape_rotate_cnt = 0;
; //}
; //0X10
; #pragma interrupt_handler timer2_ovf_isr:5
; void timer2_ovf_isr(void)
; {
;   static unsigned char tick_counter=0;
;   
;   TCNT2 = CNT0VALUE; //
;   
;   tick_flag = TICK_20MS;
;   tick_counter++;
;   //if(tick_count==5)
;   // tick_flag |=TICK_100MS;
;   if(tick_counter>9)
;   {
;    tick_counter=0;
;    tick_flag |= TICK_200MS;
;   }
;  // SEI();
; }
L2:
	ld R2,y+
	out 0x3f,R2
	ld R25,y+
	ld R24,y+
	ld R2,y+
	.dbline 0 ; func end
	reti
	.dbfunc s delay_us _delay_us fI
;           diff -> R20,R21
;         count1 -> R22,R23
;         count2 -> R10,R11
;      period_us -> R16,R17
	.even
_delay_us::
	xcall push_gset3
	.dbline -1
	.dbline 66
; 
; 
; void delay_us( unsigned int period_us )
; {
	.dbline 69
;   unsigned int count1, count2, diff;
;   
; 	count1 = TCNT1H*256+TCNT1L;
	in R2,0x2c
	clr R3
	in R22,0x2d
	clr R23
	mov R23,R22
	clr R22
	add R22,R2
	adc R23,R3
	.dbline 71
; 	
;     diff = 0;
	clr R20
	clr R21
	xjmp L8
L7:
	.dbline 74
; 
;   while (diff < period_us)
;   {
	.dbline 75
; 	count2 =TCNT1H*256+TCNT1L;
	in R2,0x2c
	clr R3
	in R10,0x2d
	clr R11
	mov R11,R10
	clr R10
	add R10,R2
	adc R11,R3
	.dbline 76
; 	if ( count2 < count1 ) 
	cp R10,R22
	cpc R11,R23
	brsh L10
	.dbline 77
; 	{
	.dbline 78
; 	  diff = (65535 - count1) + count2 + 1;
	ldi R20,-1
	ldi R21,-1
	sub R20,R22
	sbc R21,R23
	add R20,R10
	adc R21,R11
	subi R20,255  ; offset = 1
	sbci R21,255
	.dbline 79
; 	}
	xjmp L11
L10:
	.dbline 81
; 	else
; 	{
	.dbline 82
; 	  diff = (count2 - count1);
	movw R20,R10
	sub R20,R22
	sbc R21,R23
	.dbline 83
; 	}
L11:
	.dbline 84
L8:
	.dbline 73
	cp R20,R16
	cpc R21,R17
	brlo L7
	.dbline -2
	.dbline 86
;   }
; 
; }
L6:
	xcall pop_gset3
	.dbline 0 ; func end
	ret
	.dbsym r diff 20 i
	.dbsym r count1 22 i
	.dbsym r count2 10 i
	.dbsym r period_us 16 i
	.dbfunc s delay_ms _delay_ms fI
;             ms -> R20,R21
	.even
_delay_ms::
	xcall push_gset1
	movw R20,R16
	.dbline -1
	.dbline 89
; 
; void delay_ms(unsigned int ms)
; {
	xjmp L14
L13:
	.dbline 91
	.dbline 92
	ldi R16,1000
	ldi R17,3
	xcall _delay_us
	.dbline 93
L14:
	.dbline 90
;   while(ms--)
	movw R2,R20
	subi R20,1
	sbci R21,0
	tst R2
	brne L13
	tst R3
	brne L13
	.dbline -2
	.dbline 94
;   {
;     delay_us(1000);
;   }
; }
L12:
	xcall pop_gset1
	.dbline 0 ; func end
	ret
	.dbsym r ms 20 i