22 RS232通信(串口通信).zip_MATLAB串口_MATLAB串口通信_matlab GUI串口_matlab 串口通

/********************************************************************************* * 标题: RS232串口通信试验(接收) * * * * 1.通过本例程了解串口的基本原理及使用 ,理解并掌握对串口进行初始化 * * * * 2.请使用串口调试助手（Baud 4800、数据位8、停止位1、效验位无）做为上位机发给单片机， * * * * * 请学员认真消化本例程，学会用C语言操作串口 * ***********************************************************************************/ #include <REG52.H> #include <stdio.h> #include<define.h> sbit BEEP = P1^4; unsigned char b,temp; unsigned int table1[10]; unsigned char code table[]="0123456789"; sbit lcdrs = P2^6; //复位端 sbit lcdrw = P2^5; //写数据端 sbit lcden = P2^7; //使能端 sbit DQ=P3^7; void delay(unsigned int z) { while(z--); } void write_com(unsigned char com) { lcdrs=0; P0=com; lcden =0; delay(500); lcden =1; delay(500); lcden =0; } void write_data(unsigned char date) { lcdrs=1; P0=date; lcden =0; delay(500); lcden =1; delay(500); lcden =0; } void init() { lcden=0; write_com(0x38); write_com(0x0e); write_com(0x06); write_com(0x01); } void main (void) { SCON = 0x50; //REN=1允许串行接受状态，串口工作模式1 TMOD|= 0x20; //定时器工作方式2 PCON|= 0x80; //TH1 = 0xFD; //baud*2 /* reload value 19200、数据位8、停止位1。效验位无 (11.0592) TH1 = 0xF3; // //baud*2 /* 波特率4800、数据位8、停止位1。效验位无 (12M) TL1 = 0xF3; TR1 = 1; ES = 1; //开串口中断 EA = 1; // 开总中断 BEEP=1; // IE = 0x0; lcdrw = 0; init(); while(1) { if (RI) //RI接受中断标志 { RI=0; //清除RI接受中断标志 b=SBUF; //SUBF接受/发送缓冲器 } // P2=b; // 对应的led灯会亮， temp=b; write_com(0x80+0x03); write_data(table[temp/1000]); write_com(0x80+0x04); write_data(table[temp/100%10]); write_com(0x80+0x05); write_data(table[temp%100/10]); //write_com(0x80+0x06); //write_data('.'); write_com(0x80+0x06); write_data(table[temp%10]); //write_com(0x80+0x08); //write_data(0xdf); //write_com(0x80+0x09); //write_data('C'); } }