main.s

基于AVR芯片的LCD显示实验代码,可以参考做练习

	.module main.c
	.area text(rom, con, rel)
	.dbfile E:\ICCAVR\project\AVRMEG~2\icc\015-LCD1602\main.c
	.dbfunc e main _main fV
;              i -> R20
;              p -> R22,R23
	.even
_main::
	sbiw R28,2
	.dbline -1
	.dbline 16
; /*
; 实验十五：
; 	LCD1602显示实验。
; 	1、LCD1602显示实验。显示欢及网址信息。
; 	2、内部1 M晶振，程序采用单任务方式，软件延时。
; 	3、进行此实验请插上JP1、JP2的所有8个短路块，PC7短路块。
; 
; 	AVR  mega16学习板
; 	www.iccavr.com
; 	2007-04-13
; */
; 
; #include <iom16v.h>
; #include "lcd1602.h"
; 
; void main(void) {
	.dbline 21
; 
; 	unsigned char i;
; 	unsigned char *p;
; 
; 	PORTA = 0xFF;				/*打开上拉*/
	ldi R24,255
	out 0x1b,R24
	.dbline 22
; 	DDRA = 0x00;				/*方向输入*/
	clr R2
	out 0x1a,R2
	.dbline 23
; 	PORTB = 0xFF;				/*电平设置*/
	out 0x18,R24
	.dbline 24
; 	DDRB = 0xFF;				/*方向输出*/
	out 0x17,R24
	.dbline 25
; 	PORTC = 0x7F;
	ldi R24,127
	out 0x15,R24
	.dbline 26
; 	DDRC = 0x80;
	ldi R24,128
	out 0x14,R24
	.dbline 27
; 	PORTD = 0xFF;
	ldi R24,255
	out 0x12,R24
	.dbline 28
; 	DDRD = 0x00;
	out 0x11,R2
	.dbline 30
; 
; 	delay_ms(100);
	ldi R16,100
	xcall _delay_ms
	.dbline 31
; 	LCD_init();
	xcall _LCD_init
	xjmp L3
L2:
	.dbline 33
; 
; 	while (1) {
	.dbline 34
; 		i = 1;
	ldi R20,1
	.dbline 35
; 		p = "www.iccavr.com";
	ldi R22,<L5
	ldi R23,>L5
	.dbline 36
; 		LCD_clear();
	xcall _LCD_clear
	.dbline 37
; 		LCD_write_str(5,0,"Welcome");
	ldi R24,<L6
	ldi R25,>L6
	std y+1,R25
	std y+0,R24
	clr R18
	ldi R16,5
	xcall _LCD_write_str
	.dbline 38
; 		delay_ms(250);
	ldi R16,250
	xcall _delay_ms
	xjmp L8
L7:
	.dbline 40
	.dbline 41
	movw R30,R22
	ldd R2,z+0
	std y+0,R2
	ldi R18,1
	mov R16,R20
	xcall _LCD_write_char
	.dbline 42
	inc R20
	.dbline 43
	subi R22,255  ; offset = 1
	sbci R23,255
	.dbline 44
	ldi R16,250
	xcall _delay_ms
	.dbline 45
L8:
	.dbline 40
	movw R30,R22
	ldd R2,z+0
	tst R2
	brne L7
	.dbline 46
	ldi R16,250
	xcall _delay_ms
	.dbline 47
L3:
	.dbline 33
	xjmp L2
X0:
	.dbline -2
L1:
	adiw R28,2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 c
	.dbsym r p 22 pc
	.dbend
	.area data(ram, con, rel)
	.dbfile E:\ICCAVR\project\AVRMEG~2\icc\015-LCD1602\main.c
L6:
	.blkb 8
	.area idata
	.byte 'W,'e,'l,'c,'o,'m,'e,0
	.area data(ram, con, rel)
	.dbfile E:\ICCAVR\project\AVRMEG~2\icc\015-LCD1602\main.c
L5:
	.blkb 15
	.area idata
	.byte 'w,'w,'w,46,'i,'c,'c,'a,'v,'r,46,'c,'o,'m,0
	.area data(ram, con, rel)
	.dbfile E:\ICCAVR\project\AVRMEG~2\icc\015-LCD1602\main.c