51单片机主从式串行通信（proteus仿真图+keil源程序+实习报告） -

#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;
//--c已经在传递过来的时候已经赋值了，所以在for语句第一句就不用赋值了--//
for (c=d;c>0;c--)
{
for (b=38;b>0;b--)
{
for (a=130;a>0;a--);
}
}
}
void KeyDown()
{
char aa = 0;
char a;
GPIO_KEY=0x0f;
// while(1)
// {
delay10ms(10);
if(GPIO_KEY!=0x0f)//读取按键是否按下
{
delay10ms(1);//延时10ms进行消抖
if(GPIO_KEY!=0x0f)//再次检测键盘是否按下
{
//测试列
GPIO_KEY=0X0F;
switch(GPIO_KEY)
{
case(0X07): KeyValue=0;break;
case(0X0b): KeyValue=4;break;
case(0X0d): KeyValue=8;break;
case(0X0e): KeyValue=12;break;
}
//测试行
GPIO_KEY=0XF0;
switch(GPIO_KEY)
{
case(0X70): KeyValue=KeyValue+3;break;
case(0Xb0): KeyValue=KeyValue+2;break;
case(0Xd0): KeyValue=KeyValue+1;break;
case(0Xe0): KeyValue=KeyValue;break;
}
while((a<50) && (GPIO_KEY!=0xf0)) //检测按键松手检测
{
delay10ms(1);
aa++;
}
// break;
// }
}
}
}
void UsartConfiguration()
{
SCON=0X50; //设置为工作方式1
TMOD=0X21; //设置计数器工作方式2
// TH1=0XFd; //计数器初始值设置，注意波特率是9600的
// TL1=0XFd; //11.0592晶振
// PCON=0X80; //波特率加倍
TH1=0XF3; //计数器初始值设置，注意波特率是4800的
TL1=0XF3; //12.0000晶振
ET0 = 1; //打开TO定时器
TR0 = 1; //开启中断
TH0 = (65536-5000)/256;
TL0 = (65536-5000)%256;
ES=1; //打开接收中断
EA=1; //打开总中断
TR1=1; //打开计数器
}
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); //清屏
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); //清屏
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteCom(0xc0); //清屏
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
LcdWriteData(' ');
}
LcdWriteCom(0x8b);
LcdWriteData('S');
LcdWriteData('T');
LcdWriteData('A');
LcdWriteData('R');
LcdWriteData('T');
}
else
{
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); //清屏
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(' ');
}
// LcdWriteCom(0x88); //清屏
// LcdWriteData('0'+(KeyValue%100)/10);
// LcdWriteData('0'+KeyValue%10);
}
//第一位显示地址第二位数据显示
void senddata(unsigned char cmd)
{
SBUF = cmd;
while(!TI);//等待发送完成信号（TI=1）出现
TI=0;
}
void main(void)
{
LcdInit();
UsartConfiguration();//初始化串口
LcdWriteCom(0xcb);
LcdWriteData('1');
LcdWriteData('.');
LcdWriteData('0');
LcdWriteData('S');
while(1)
{
KeyValue = 99;
KeyDown(); //获取按键
if(KeyValue==14)
{
time = time - 5; //1s
}
if(KeyValue==15)
{
time = time + 5; //1s
}
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');
//按键设置
if(start==0)
{
if(KeyValue==1)
senddata(1);
else if(KeyValue==2)
senddata(2);
}
else
{
//时间到获取数据
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)
{
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