目录
一、主要功能
1、LCD1602液晶显示
2、矩阵按键，独立按键设置采集模式
3、主机显示从机采集的电压数据
4、从机采集电压数据传送到主机
5、可以设置采集显示的时间0.5s或1s
二、使用步骤
基于51单片机的主从串行通信系统通常采用主从式多机通信架构，主机通过串口控制多个从机，实现数据交互与设备协同。
三、硬件资源
1、51单片机核心模块
2、按键模块
3、数模转换模块
4、LCD1602显示模块
四、软件设计
#include<reg51.h>
#include <INTRINS.H>
#include"lcd.h"
#define GPIO_KEY P1
char KeyValue;
sbit key_1 = P2^0;
sbit key_2 = P2^1;
unsigned char receiveData=0;
unsigned int V_A = 0;
unsigned int V_B = 0;
unsigned char rec[6];
char r = 0;
int count = 0;
bit start = 0;
int time = 10; //默认1s时间
void delay10ms(unsigned char d) //误差 0us
{
unsigned char a, b,c;
for (c=d;c>0;c--)
{
for (b=38;b>0;b--)
{
for (a=130;a>0;a--);
}
}
}
void display(void)
{
if(start)
{
if(count<10)
{
LcdWriteCom(0x80); //清屏
LcdWriteData('A');
LcdWriteData('-');
LcdWriteData('0'+V_A/100);
LcdWriteData('.');
LcdWriteData('0'+(V_A%100)/10);
LcdWriteData('0'+V_A%10);
LcdWriteData('V');
LcdWriteCom(0xc0);
LcdWriteData('B');
LcdWriteData('-');
LcdWriteData('0'+V_B/100);
LcdWriteData('.');
LcdWriteData('0'+(V_B%100)/10);
LcdWriteData('0'+V_B%10);
LcdWriteData('V');
}
else
{
LcdWriteCom(0x80);
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteCom(0xc0);
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
}
LcdWriteCom(0x8b);
LcdWriteData('S');
LcdWriteData('T');
LcdWriteData('A');
LcdWriteData('R');
LcdWriteData('T');
}
else
{
LcdWriteCom(0x80);
LcdWriteData('A');
LcdWriteData('-');
LcdWriteData('0'+V_A/100);
LcdWriteData('.');
LcdWriteData('0'+(V_A%100)/10);
LcdWriteData('0'+V_A%10);
LcdWriteData('V');
LcdWriteCom(0xc0);
LcdWriteData('B');
LcdWriteData('-');
LcdWriteData('0'+V_B/100);
LcdWriteData('.');
LcdWriteData('0'+(V_B%100)/10);
LcdWriteData('0'+V_B%10);
LcdWriteData('V');
LcdWriteCom(0x8b);
LcdWriteData('S');
LcdWriteData('T');
LcdWriteData('O');
LcdWriteData('P');
LcdWriteData(' ');
}
}
void main(void)
{
LcdInit();
UsartConfiguration();
LcdWriteCom(0xcb);
LcdWriteData('1');
LcdWriteData('.');
LcdWriteData('0');
LcdWriteData('S');
while(1)
{
KeyValue = 99;
KeyDown();
if(KeyValue==14)
{
time = time - 5; //
}
if(KeyValue==15)
{
time = time + 5;
}
if(time<5)
time = 5;
else if(time>990)
time = 990;
LcdWriteCom(0xca);
LcdWriteData('0'+time/100);
LcdWriteData('0'+time%100/10);
LcdWriteData('.');
LcdWriteData('0'+time%10);
LcdWriteData('S');
if(start==0)
{
if(KeyValue==1)
senddata(1);
else if(KeyValue==2)
senddata(2);
}
else
{
if(count>time*2)
{
senddata(1);
delay10ms(10);
if(rec[0]==1)
{
V_A = rec[1]*2;
}
else if(rec[0]==2)
{
V_B = rec[1]*2;
}
senddata(2);
delay10ms(10);
if(rec[0]==1)
{
V_A = rec[1]*2;
}
else if(rec[0]==2)
{
V_B = rec[1]*2;
}
count = 0;
}
}
if(rec[0]==1)
{
V_A = rec[1]*2;
}
else if(rec[0]==2)
{
V_B = rec[1]*2;
}
if(key_1==0)
{
while(key_1==0);
start = 0;
//senddata(1);
}
if(key_2==0)
{
while(key_2==0);
start = 1;
}
display();
delay10ms(10);
}
}
void delay1s(void) interrupt 1
{
TH0 = (65536-45000)/256;
TL0 = (65536-45000)%256;
count++;
}
五、实验现象
演示视频：
