51单片机驱动1602显示万年历
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实验名称:51单片机驱动1602显示万年历
实验说明:本实验使用硬件连接,相对于proteus仿真软件,更切合实际,体验在硬件制作过程中遇到的问题与解决的过程
实验硬件工具:51单片机最小模块,1602显示屏,一个332(3300欧姆)贴片小电阻,杜邦线若干
实验图片:
时间没改,额(⊙o⊙)…
实验程序:
#include<reg52.h>
#define DataPort P1
sbit RS=P2^4;
sbit RW=P2^3;
sbit E=P2^2;
char table1[]="0123456789-";
int second = 0; //¶¨ÒåÃë
int point = 0; //¶¨Òå·Ö
int hour = 23; //¶¨ÒåСʱ
int timer_cnt = 0;
void delay1ms() //@12.000MHz
{
unsigned char i, j;
i = 12;
j = 169;
do
{
while (--j);
} while (--i);
}
void delay3ms() //@12.000MHz
{
unsigned char i, j;
i = 100;
j = 1;
do
{
while (--j);
} while (--i);
}
void timer0init()
{
TMOD = 0x01; //ÉèÖö¨Ê±Æ÷0Ϊ1ģʽ16λ¼ÆÊýģʽ
ET0 = 1; //¿ª¶¨Ê±Æ÷0ÖжÏ
EA = 1; //¿ª×ÜÖжÏ
TH0 = (65536-5000)/256; //¸ø¼ÆÊýÆ÷¸ß°Ëλ¸³³õÖµ
TL0 = (65536-5000)%256; //¸ø¼ÆÊýÆ÷µÍ°Ëλ¸³³õÖµ//¶¨Ê±5000´Î¾ÍÓÐ5msÒ»´ÎÖжÏ
TR0 = 1; //Æô¶¯¶¨Ê±Æ÷
}
void WriteCmd(char cmd)
{
RS=0;
RW=0;
E=0;
DataPort=cmd;
delay3ms();
E=1;
delay1ms();
E=0;
}
void WriteDat(char dat)
{
RS=1;
RW=0;
E=0;
DataPort=dat;
delay3ms();
E=1;
delay1ms();
E=0;
}
void InitLcd1602() //оƬ³õʼ»¯
{
WriteCmd(0x38);
delay3ms();
WriteCmd(0x38);
delay3ms();
WriteCmd(0x38);
delay3ms();
WriteCmd(0x08);//¹Ø±ÕÏÔʾÆÁ
WriteCmd(0x01);//ÏÔʾÇåÆÁ
delay3ms();
WriteCmd(0x06);//ÏÔʾ¹â±êÒƶ¯
WriteCmd(0x0c);//ÏÔʾ¿ª¼°¹â±ê
}
void main()
{
int i;
InitLcd1602();//оƬ³õʼ»¯
timer0init(); //³õʼ»¯¶¨Ê±Æ÷
while(1)
{
WriteCmd(0x80);
WriteDat(table1[hour/10]);
WriteDat(table1[hour%10]);
WriteDat(table1[10]);
WriteDat(table1[point/10]);
WriteDat(table1[point%10]);
WriteDat(table1[10]);
WriteDat(table1[second/10]);
WriteDat(table1[second%10]);
}
}
void timer0() interrupt 1 //ÖжϷþÎñº¯Êý
{
TH0 = (65536-5000)/256; //ÿ´Î½øÖж϶¼Òª¸ø¼ÆÊýÆ÷ÖØи³Öµ
TL0 = (65536-5000)%256;
timer_cnt++; //ÓÃÀ´¼ÆÊý½øÖж϶àÉÙ´Î
if(timer_cnt==197) //µ±½øÀ´200´ÎÖжÏʱºò¾ÍµÃÒ»Ã룬second¼ÓÒ»
{
second++;
timer_cnt = 0;
}
if(second==60) //µ±ÃëµÈÓÚ60ʱ
{
second = 0; //ÃëÖØÐÂֵΪÁã
point++; //·Ö¼ÓÒ»
}
if(point==60) //µ±·ÖµÈÓÚ60ʱ
{
point = 0; //·ÖֵΪÁã
hour++; //Сʱ¼ÓÒ»
}
if(hour==24)
{
hour = 0;
}
}
/*--------------------------------------------------------------------------
REG52.H
Header file for generic 80C52 and 80C32 microcontroller.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
--------------------------------------------------------------------------*/
#ifndef __REG52_H__
#define __REG52_H__
/* BYTE Registers */
sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr IE = 0xA8;
sfr IP = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;
/* 8052 Extensions */
sfr T2CON = 0xC8;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
/* BIT Registers */
/* PSW */
sbit CY = PSW^7;
sbit AC = PSW^6;
sbit F0 = PSW^5;
sbit RS1 = PSW^4;
sbit RS0 = PSW^3;
sbit OV = PSW^2;
sbit P = PSW^0; //8052 only
/* TCON */
sbit TF1 = TCON^7;
sbit TR1 = TCON^6;
sbit TF0 = TCON^5;
sbit TR0 = TCON^4;
sbit IE1 = TCON^3;
sbit IT1 = TCON^2;
sbit IE0 = TCON^1;
sbit IT0 = TCON^0;
/* IE */
sbit EA = IE^7;
sbit ET2 = IE^5; //8052 only
sbit ES = IE^4;
sbit ET1 = IE^3;
sbit EX1 = IE^2;
sbit ET0 = IE^1;
sbit EX0 = IE^0;
/* IP */
sbit PT2 = IP^5;
sbit PS = IP^4;
sbit PT1 = IP^3;
sbit PX1 = IP^2;
sbit PT0 = IP^1;
sbit PX0 = IP^0;
/* P3 */
sbit RD = P3^7;
sbit WR = P3^6;
sbit T1 = P3^5;
sbit T0 = P3^4;
sbit INT1 = P3^3;
sbit INT0 = P3^2;
sbit TXD = P3^1;
sbit RXD = P3^0;
/* SCON */
sbit SM0 = SCON^7;
sbit SM1 = SCON^6;
sbit SM2 = SCON^5;
sbit REN = SCON^4;
sbit TB8 = SCON^3;
sbit RB8 = SCON^2;
sbit TI = SCON^1;
sbit RI = SCON^0;
/* P1 */
sbit T2EX = P1^1; // 8052 only
sbit T2 = P1^0; // 8052 only
/* T2CON */
sbit TF2 = T2CON^7;
sbit EXF2 = T2CON^6;
sbit RCLK = T2CON^5;
sbit TCLK = T2CON^4;
sbit EXEN2 = T2CON^3;
sbit TR2 = T2CON^2;
sbit C_T2 = T2CON^1;
sbit CP_RL2 = T2CON^0;
#endif
实验注意:332电阻非常重要,以前做过类似的实验没有显示成功,就是电阻的问题,电阻太小不行,一般要超过1.5K,当然太大也不行。
太高难度了有木有,但还是成功了,哈哈!
希望读者提出不明白的地方和对实验更好的建议与改进的方法。
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