delay.s

lcd液晶驱动显示原代码 根据硬件自己修改

	.module delay.c
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\Administrator\桌面\1602\delay.c
	.dbfunc e delay_1us _delay_1us fV
	.even
_delay_1us::
	.dbline -1
	.dbline 8
; /*---------------------------------------延时函数-------------------------------------*/ 
; 
; /*-----------------------------------------------------------------------
; 延时函数
; 系统时钟：8M
; -----------------------------------------------------------------------*/
; void delay_1us(void)                 //1us延时函数
;   {
	.dbline 9
;    asm("nop");
	nop
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e delay_nus _delay_nus fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_nus::
	rcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 13
;   }
; 
; void delay_nus(unsigned int n)       //N us延时函数
;   {
	.dbline 14
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 15
;    for (i=0;i<n;i++)
	rjmp L6
L3:
	.dbline 16
	rcall _delay_1us
L4:
	.dbline 15
	subi R20,255  ; offset = 1
	sbci R21,255
L6:
	.dbline 15
	cp R20,R22
	cpc R21,R23
	brlo L3
	.dbline -2
L2:
	rcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend
	.dbfunc e delay_1ms _delay_1ms fV
;           xtal -> R16
;              i -> R18,R19
	.even
_delay_1ms::
	.dbline -1
	.dbline 20
;    delay_1us();
;   }
; 
; void delay_1ms(void )  //延时1ms 
; { 
	.dbline 23
;    unsigned int i ; 
;    unsigned char xtal; 
;    xtal=4; 
	ldi R16,4
	.dbline 24
;    for (i=1;i<(xtal*143-2);i++) 
	ldi R18,1
	ldi R19,0
	rjmp L11
L8:
	.dbline 25
	.dbline 26
	.dbline 27
L9:
	.dbline 24
	subi R18,255  ; offset = 1
	sbci R19,255
L11:
	.dbline 24
	ldi R24,143
	mul R24,R16
	movw R24,R0
	sbiw R24,2
	cp R18,R24
	cpc R19,R25
	brlo L8
	.dbline -2
L7:
	.dbline 0 ; func end
	ret
	.dbsym r xtal 16 c
	.dbsym r i 18 i
	.dbend
	.dbfunc e delay_nms _delay_nms fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_nms::
	rcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 31
;    { 
;     ; 
;    }    
; } 
; 
; void delay_nms(unsigned int n)  //延时nms 
; { 
	.dbline 32
;    unsigned int i=0 ;  
	clr R20
	clr R21
	.dbline 33
;    for(i=0;i<n;i++) 
	rjmp L16
L13:
	.dbline 34
	.dbline 35
	rcall _delay_1ms
	.dbline 36
L14:
	.dbline 33
	subi R20,255  ; offset = 1
	sbci R21,255
L16:
	.dbline 33
	cp R20,R22
	cpc R21,R23
	brlo L13
	.dbline -2
L12:
	rcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend