51单片机-4G模块

4G控制LED

#include "reg52.h"
#include "intrins.h"
#include <string.h>#define SIZE 12
sfr AUXR = 0x8E;
sbit D5 = P3^7;
char cmd[SIZE];void UartInit(void)		//9600bps@11.0592MHz
{AUXR = 0x01;SCON = 0x50; //配置串口工作方式1，REN使能接收TMOD &= 0x0F;TMOD |= 0x20;//定时器1工作方式位8位自动重装TH1 = 0xFD;TL1 = 0xFD;//9600波特率的初值TR1 = 1;//启动定时器EA = 1;//开启总中断ES = 1;//开启串口中断
}void Delay1000ms()		//@11.0592MHz
{unsigned char i, j, k;_nop_();i = 8;j = 1;k = 243;do{do{while (--k);} while (--j);} while (--i);
}void sendByte(char data_msg)
{SBUF = data_msg;while(!TI);TI = 0;
}void sendString(char* str)
{while( *str != '\0'){sendByte(*str);str++;}
}void main()
{D5 = 1;//配置C51串口的通信方式UartInit();while(1){Delay1000ms();//往发送缓冲区写入数据，就完成数据的发送//sendString("chenlichen shuai\r\n");}
}void Uart_Handler() interrupt 4
{static int i = 0;//静态变量，被初始化一次char tmp;if(RI)//中断处理函数中，对于接收中断的响应{RI = 0;//清除接收中断标志位tmp = SBUF;if(tmp == ':'){i = 0;}cmd[i++] = tmp;if(cmd[0]== ':' && cmd[1] == 'o' && cmd[2]=='p'){D5 = 0;//点亮D5i = 0;memset(cmd,'\0',SIZE);}if(cmd[0]== ':' && cmd[1] == 'c' && cmd[2]=='l'){D5 = 1;//熄灭D5i = 0;memset(cmd,'\0',SIZE);}if(i == 12) i = 0;}if(TI);
}