main.s

LCD1602液晶屏的四线驱动模块

	.module main.c
	.area text(rom, con, rel)
	.dbfile D:\MYJOB~1\AVR资料\示例程序\DS1302-LCD1602-4bitBUS\main.c
	.dbfunc e main _main fV
;           temp -> R20
	.even
_main::
	sbiw R28,1
	.dbline -1
	.dbline 23
; /*
; 实验LCD四线驱动程序：
; 
; 	DS1302时钟实险，LCD1602四线驱动显示。
; 	1、设置和读取DS1302内部时钟，并通过LCD1602四线驱动显示。
; 	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PB4-PB7、PD3、PD4、PD6，PC4、PC7短路块。
; 	4、DS1302芯片接口占用JTAG仿真接口，在做实验时需要关闭mega16的JTAG功能。
; 	5、此实验需要有LCD1602显示屏才可以显示。
; 	6、此实验对硬件及芯片的综合知识要求比较高，所以建议大家把此实验放到后面。
; 
; 	此实验参照了版主tonghe的DS1302时钟程序。
; 
; 	AVR  mega16学习板
; 	www.iccavr.com
; 	10:44 2007-8-7
; */
; 
; #include "iom16v.h"
; #include "ds1302.h"
; #include "lcd1602.h"
; 
; void main(void) {
	.dbline 27
; 
; 	unsigned char temp;
; 
; 	PORTA = 0xFF;				/*打开上拉*/
	ldi R24,255
	out 0x1b,R24
	.dbline 28
; 	DDRA = 0x00;				/*方向输入*/
	clr R2
	out 0x1a,R2
	.dbline 29
; 	PORTB = 0xF0;				/*电平设置*/
	ldi R24,240
	out 0x18,R24
	.dbline 30
; 	DDRB = 0xFF;				/*方向输出*/
	ldi R24,255
	out 0x17,R24
	.dbline 31
; 	PORTC = 0x7F;
	ldi R24,127
	out 0x15,R24
	.dbline 32
; 	DDRC = 0x80;
	ldi R24,128
	out 0x14,R24
	.dbline 33
; 	PORTD = 0xFF;
	ldi R24,255
	out 0x12,R24
	.dbline 34
; 	DDRD = 0x00;
	out 0x11,R2
	.dbline 36
; 
; 	delay_ms(200);
	ldi R16,200
	xcall _delay_ms
	.dbline 37
; 	LCD_init();
	xcall _LCD_init
	.dbline 38
; 	ds1302_init();
	xcall _ds1302_init
	.dbline 39
; 	delay_ms(10);
	ldi R16,10
	xcall _delay_ms
	.dbline 40
; 	ds1302_write_time();
	xcall _ds1302_write_time
	xjmp L3
L2:
	.dbline 42
	.dbline 43
	ldi R16,200
	xcall _delay_ms
	.dbline 44
	xcall _ds1302_read_time
	.dbline 45
	xcall _LCD_clear
	.dbline 47
	lds R20,_time_buf
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 48
	std y+0,R20
	clr R18
	clr R16
	xcall _LCD_write_char
	.dbline 49
	lds R20,_time_buf
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 50
	std y+0,R20
	clr R18
	ldi R16,1
	xcall _LCD_write_char
	.dbline 51
	lds R20,_time_buf+1
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 52
	std y+0,R20
	clr R18
	ldi R16,2
	xcall _LCD_write_char
	.dbline 53
	lds R20,_time_buf+1
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 54
	std y+0,R20
	clr R18
	ldi R16,3
	xcall _LCD_write_char
	.dbline 55
	ldi R24,45
	std y+0,R24
	clr R18
	ldi R16,4
	xcall _LCD_write_char
	.dbline 57
	lds R20,_time_buf+2
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 58
	std y+0,R20
	clr R18
	ldi R16,5
	xcall _LCD_write_char
	.dbline 59
	lds R20,_time_buf+2
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 60
	std y+0,R20
	clr R18
	ldi R16,6
	xcall _LCD_write_char
	.dbline 61
	ldi R24,45
	std y+0,R24
	clr R18
	ldi R16,7
	xcall _LCD_write_char
	.dbline 63
	lds R20,_time_buf+3
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 64
	std y+0,R20
	clr R18
	ldi R16,8
	xcall _LCD_write_char
	.dbline 65
	lds R20,_time_buf+3
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 66
	std y+0,R20
	clr R18
	ldi R16,9
	xcall _LCD_write_char
	.dbline 68
	lds R20,_time_buf+4
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 69
	std y+0,R20
	ldi R18,1
	ldi R16,8
	xcall _LCD_write_char
	.dbline 70
	lds R20,_time_buf+4
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 71
	std y+0,R20
	ldi R18,1
	ldi R16,9
	xcall _LCD_write_char
	.dbline 72
	ldi R24,58
	std y+0,R24
	ldi R18,1
	ldi R16,10
	xcall _LCD_write_char
	.dbline 74
	lds R20,_time_buf+5
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 75
	std y+0,R20
	ldi R18,1
	ldi R16,11
	xcall _LCD_write_char
	.dbline 76
	lds R20,_time_buf+5
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 77
	std y+0,R20
	ldi R18,1
	ldi R16,12
	xcall _LCD_write_char
	.dbline 78
	ldi R24,58
	std y+0,R24
	ldi R18,1
	ldi R16,13
	xcall _LCD_write_char
	.dbline 80
	lds R20,_time_buf+6
	swap R20
	andi R20,#0x0F
	subi R20,208    ; addi 48
	.dbline 81
	std y+0,R20
	ldi R18,1
	ldi R16,14
	xcall _LCD_write_char
	.dbline 82
	lds R20,_time_buf+6
	andi R20,15
	subi R20,208    ; addi 48
	.dbline 83
	std y+0,R20
	ldi R18,1
	ldi R16,15
	xcall _LCD_write_char
	.dbline 84
L3:
	.dbline 42
	xjmp L2
X0:
	.dbline -2
L1:
	adiw R28,1
	.dbline 0 ; func end
	ret
	.dbsym r temp 20 c
	.dbend