main.s

一个用mega8开发的速度发生器,速度比较准确,值得下载

	.module main.c
	.area data(ram, con, rel)
_flag::
	.blkb 1
	.area idata
	.byte 0
	.area data(ram, con, rel)
	.dbfile D:\xb_work\标准速度测试仪\speed_mega8\C_file\main.c
	.dbsym e flag _flag c
	.area text(rom, con, rel)
	.dbfile D:\xb_work\标准速度测试仪\speed_mega8\C_file\main.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 11
; //ICC-AVR application builder : 2006-10-11 上午 11:30:40
; // Target : M8
; // Crystal: 6.0000Mhz
; 
; #include <iom8v.h>
; #include <macros.h>
; 
;  unsigned char flag =0;
; 
; void port_init(void)
; {
	.dbline 12
;  PORTB = 0x00;
	clr R2
	out 0x18,R2
	.dbline 13
;  DDRB  = 0x00;
	out 0x17,R2
	.dbline 14
;  PORTC = 0x00; //m103 output only
	out 0x15,R2
	.dbline 15
;  DDRC  = 0x00;
	out 0x14,R2
	.dbline 16
;  PORTD = 0x00;
	out 0x12,R2
	.dbline 17
;  DDRD  = 0x00;
	out 0x11,R2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e watchdog_init _watchdog_init fV
	.even
_watchdog_init::
	.dbline -1
	.dbline 23
; }
; 
; //Watchdog initialize
; // prescale: 16K 
; void watchdog_init(void)
; {
	.dbline 24
;  WDR(); //this prevents a timout on enabling
	wdr
	.dbline 25
;  WDTCR = 0x08; //WATCHDOG ENABLED - dont forget to issue WDRs
	ldi R24,8
	out 0x21,R24
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e timer1_init _timer1_init fV
	.even
_timer1_init::
	.dbline -1
	.dbline 33
; }
; 
; //TIMER1 initialize - prescale:1
; // WGM: 0) Normal, TOP=0xFFFF
; // desired value: 320Hz
; // actual value: 320.000Hz (0.0%)
; void timer1_init(void)
; {
	.dbline 34
;  TCCR1B = 0x00; //stop
	clr R2
	out 0x2e,R2
	.dbline 35
;  TCNT1H = 0xD8; //setup
	ldi R24,216
	out 0x2d,R24
	.dbline 36
;  TCNT1L = 0xF0;
	ldi R24,240
	out 0x2c,R24
	.dbline 37
;  OCR1AH = 0x27;
	ldi R24,39
	out 0x2b,R24
	.dbline 38
;  OCR1AL = 0x10;
	ldi R24,16
	out 0x2a,R24
	.dbline 39
;  OCR1BH = 0x27;
	ldi R24,39
	out 0x29,R24
	.dbline 40
;  OCR1BL = 0x10;
	ldi R24,16
	out 0x28,R24
	.dbline 41
;  ICR1H  = 0x27;
	ldi R24,39
	out 0x27,R24
	.dbline 42
;  ICR1L  = 0x10;
	ldi R24,16
	out 0x26,R24
	.dbline 43
;  TCCR1A = 0x00;
	out 0x2f,R2
	.dbline 44
;  TCCR1B = 0x01; //start Timer
	ldi R24,1
	out 0x2e,R24
	.dbline -2
L3:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 16
	rjmp _timer1_ovf_isr
	.area text(rom, con, rel)
	.dbfile D:\xb_work\标准速度测试仪\speed_mega8\C_file\main.c
	.dbfunc e timer1_ovf_isr _timer1_ovf_isr fV
	.even
_timer1_ovf_isr::
	st -y,R2
	st -y,R24
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 49
; }
; 
; #pragma interrupt_handler timer1_ovf_isr:9
; void timer1_ovf_isr(void)
; {
	.dbline 51
;  //TIMER1 has overflowed
;   TCNT1H = 0xD8; 
	ldi R24,216
	out 0x2d,R24
	.dbline 52
;   TCNT1L = 0xF0;
	ldi R24,240
	out 0x2c,R24
	.dbline 55
;  
;  
;   if(flag ==0)
	lds R2,_flag
	tst R2
	brne L5
	.dbline 56
;   {
	.dbline 57
;       PORTD |= 0x04;
	sbi 0x12,2
	.dbline 58
; 	  flag =1;
	ldi R24,1
	sts _flag,R24
	.dbline 59
;   }else
	rjmp L6
L5:
	.dbline 60
	.dbline 61
	cbi 0x12,2
	.dbline 62
	clr R2
	sts _flag,R2
	.dbline 63
L6:
	.dbline -2
L4:
	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 69
;   {
;       PORTD &= ~(0x04);
; 	  flag =0;
;   }
;  
; }
; 
; //call this routine to initialize all peripherals
; void init_devices(void)
; {
	.dbline 71
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 72
;  port_init();
	rcall _port_init
	.dbline 73
;  watchdog_init();
	rcall _watchdog_init
	.dbline 74
;  timer1_init();
	rcall _timer1_init
	.dbline 76
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 77
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 78
;  TIMSK = 0x04; //timer interrupt sources
	ldi R24,4
	out 0x39,R24
	.dbline 79
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
L7:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 85
;  //all peripherals are now initialized
; }
; 
; //************************************************************ 
;  void main(void)
;  {
	.dbline 86
;   init_devices();
	rcall _init_devices
	.dbline 87
;   DDRD  |= 0x04;
	sbi 0x11,2
	.dbline 88
;   PORTD |= 0x04;
	sbi 0x12,2
	.dbline 89
;   flag =1;
	ldi R24,1
	sts _flag,R24
	rjmp L10
L9:
	.dbline 92
	.dbline 93
	wdr
	.dbline 94
L10:
	.dbline 91
	rjmp L9
X0:
	.dbline -2
L8:
	.dbline 0 ; func end
	ret
	.dbend