display.s

atmega8操作74hc164进行串口静态显示程序

	.module display.c
	.area text(rom, con, rel)
	.dbfile D:\job\avrtest\web\example\display\display.c
	.dbfunc e timer1_init _timer1_init fV
	.even
_timer1_init::
	.dbline -1
	.dbline 13
; //ICC-AVR application builder : 2005-2-24 23:07:53
; // Target : M8
; // Crystal: 8.0000Mhz
; 
; #include <iom8v.h>
; #include <macros.h>
; 
; unsigned char  n;
; 
; //TIMER1 initialisation - prescale:256
; // actual value:  1.000Hz (0.0%)
; void timer1_init(void)
; {
	.dbline 14
;  TCCR1B = 0x00; //stop
	clr R2
	out 0x2e,R2
	.dbline 15
;  TCNT1H = 0x85; //setup
	ldi R24,133
	out 0x2d,R24
	.dbline 16
;  TCNT1L = 0xEE;
	ldi R24,238
	out 0x2c,R24
	.dbline 17
;  OCR1AH = 0x7A;
	ldi R24,122
	out 0x2b,R24
	.dbline 18
;  OCR1AL = 0x12;
	ldi R24,18
	out 0x2a,R24
	.dbline 19
;  OCR1BH = 0x7A;
	ldi R24,122
	out 0x29,R24
	.dbline 20
;  OCR1BL = 0x12;
	ldi R24,18
	out 0x28,R24
	.dbline 21
;  ICR1H  = 0x7A;
	ldi R24,122
	out 0x27,R24
	.dbline 22
;  ICR1L  = 0x12;
	ldi R24,18
	out 0x26,R24
	.dbline 23
;  TCCR1A = 0x00;
	out 0x2f,R2
	.dbline 24
;  TCCR1B = 0x04; //start Timer
	ldi R24,4
	out 0x2e,R24
	.dbline -2
	.dbline 25
; }
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 16
	rjmp _timer1_ovf_isr
	.area text(rom, con, rel)
	.dbfile D:\job\avrtest\web\example\display\display.c
	.dbfunc e timer1_ovf_isr _timer1_ovf_isr fV
;              i -> R16
;             ch -> R18
	.even
_timer1_ovf_isr::
	st -y,R2
	st -y,R16
	st -y,R18
	st -y,R24
	st -y,R25
	in R2,0x3f
	st -y,R2
	.dbline -1
	.dbline 30
; 
; //  timer1 中断 ，1秒
; #pragma interrupt_handler timer1_ovf_isr:9
; void timer1_ovf_isr(void)
; {
	.dbline 33
;     unsigned char  ch,i;
; 
;     TCNT1H = 0x85; //reload counter high value
	ldi R24,133
	out 0x2d,R24
	.dbline 34
;     TCNT1L = 0xEE; //reload counter low value
	ldi R24,238
	out 0x2c,R24
	.dbline 36
; 
;     if(++n == 10) n = 0;
	lds R24,_n
	subi R24,255    ; addi 1
	mov R2,R24
	sts _n,R2
	cpi R24,10
	brne L3
	.dbline 36
	clr R2
	sts _n,R2
L3:
	.dbline 37
;     ch = n | 0x70;
	lds R18,_n
	ori R18,112
	.dbline 38
;     PORTB &= ~0x01;      //  消隐
	cbi 0x18,0
	.dbline 39
;     PORTD &= ~0x40;      //  CLK
	cbi 0x12,6
	.dbline 40
	clr R16
	rjmp L8
L5:
	.dbline 40
;     for(i=0; i<8; i++){
	.dbline 41
;         if(ch & 0x80)
	sbrs R18,7
	rjmp L9
	.dbline 42
;             PORTD |= 0x80;
	sbi 0x12,7
	rjmp L10
L9:
	.dbline 44
;         else
;             PORTD &= ~0x80;
	cbi 0x12,7
L10:
	.dbline 45
	lsl R18
	.dbline 46
	sbi 0x12,6
	.dbline 47
	nop
	.dbline 48
	cbi 0x12,6
	.dbline 49
L6:
	.dbline 40
	inc R16
L8:
	.dbline 40
	cpi R16,8
	brlo L5
	.dbline 50
;         ch <<= 1;
;         PORTD |= 0x40;
;         asm("nop");
;         PORTD &= ~0x40;
;     }
;     PORTB |= 0x01;      //  显示
	sbi 0x18,0
	.dbline -2
	.dbline 51
; }
L2:
	ld R2,y+
	out 0x3f,R2
	ld R25,y+
	ld R24,y+
	ld R18,y+
	ld R16,y+
	ld R2,y+
	.dbline 0 ; func end
	reti
	.dbsym r i 16 c
	.dbsym r ch 18 c
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 55
; 
; //  初始化
; void init_devices(void)
; {
	.dbline 56
;  CLI();          //  禁止中断
	cli
	.dbline 57
;  DDRB = 0x01;    //  初始化操作74LS164的管脚
	ldi R24,1
	out 0x17,R24
	.dbline 58
;  DDRD = 0xC0;    //  初始化操作74LS164的管脚
	ldi R24,192
	out 0x11,R24
	.dbline 59
;  timer1_init();
	rcall _timer1_init
	.dbline 61
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 62
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 63
;  TIMSK = 0x04;   //  设置timer1中断
	ldi R24,4
	out 0x39,R24
	.dbline 64
;  SEI();          //  中断使能
	sei
	.dbline -2
	.dbline 65
; }
L11:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
;              x -> R20
	.even
_main::
	.dbline -1
	.dbline 69
; 
; //
; void main(void)
; {
	.dbline 71
;  unsigned char   x;
;  init_devices();
	rcall _init_devices
	.dbline 73
L13:
	.dbline 73
	.dbline 74
	inc R20
	.dbline 75
	.dbline 73
	.dbline 73
	rjmp L13
X0:
	.dbline -2
L12:
	.dbline 0 ; func end
	ret
	.dbsym r x 20 c
	.dbend
	.area bss(ram, con, rel)
	.dbfile D:\job\avrtest\web\example\display\display.c
_n::
	.blkb 1
	.dbsym e n _n c