基于51单片机的蓝牙点灯实验代码

#include "reg52.h" #include "intrins.h" #include "stdio.h" #define uchar unsigned char #define uint unsigned int #define LCD1602_DATAPINS P0 //P0口数据显示 sbit LCD1602_RS=P3^5; //1602引脚定义 sbit LCD1602_RW=P3^6; sbit LCD1602_E=P3^4; sbit k1=P3^2; //开 sbit k2=P3^3; //关 sbit led=P1^0; uchar led_flag=0; uchar reseve_flag=0;//接收标志位 void UART_Init();//串口初始化 void uartSendByte(unsigned char dat);//发送数据 void uartSendStr(unsigned char *s,unsigned char length);//发送字符串 void Lcd1602_Delay1ms(uint c) //延时函数，延时1ms { uchar a,b; for (; c>0; c--) { for (b=199;b>0;b--) { for(a=1;a>0;a--); } } } void DelayUs2x(unsigned char t) { while(--t); } void delay_ms(unsigned int t) //毫秒延时 { unsigned int a,b; for(a=0;a<t;a++) for(b=0;b<120;b++); } void LcdWriteCom(uchar com) //写入命令 { LCD1602_E = 0; //使能清零 LCD1602_RS = 0; //选择写入命令 LCD1602_RW = 0; //选择写入 LCD1602_DATAPINS = com; //由于4位的接线是接到P0口的高四位，所以传送高四位不用改 Lcd1602_Delay1ms(1); LCD1602_E = 1; //写入时序 Lcd1602_Delay1ms(5); LCD1602_E = 0; LCD1602_DATAPINS = com << 4; //发送低四位 Lcd1602_Delay1ms(1); LCD1602_E = 1; //写入时序 Lcd1602_Delay1ms(5); LCD1602_E = 0; } void LcdWriteData(uchar dat) //写入数据 { LCD1602_E = 0; //使能清零 LCD1602_RS = 1; //选择写入数据 LCD1602_RW = 0; //选择写入 LCD1602_DATAPINS = dat; //由于4位的接线是接到P0口的高四位，所以传送高四位不用改 Lcd1602_Delay1ms(1); LCD1602_E = 1; //写入时序 Lcd1602_Delay1ms(5); LCD1602_E = 0; LCD1602_DATAPINS = dat << 4; //写入低四位 Lcd1602_Delay1ms(1); LCD1602_E = 1; //写入时序 Lcd1602_Delay1ms(5); LCD1602_E = 0; } void LcdClean(void)// 清屏 { LcdWriteCom(0x01); } void LcdInit() //LCD初始化子程序 { LcdWriteCom(0x32); //将8位总线转为4位总线 LcdWriteCom(0x28); //在四位线下的初始化 LcdWriteCom(0x0c); //开显示不显示光标 LcdWriteCom(0x06); //写一个指针加1 LcdWriteCom(0x01); //清屏 LcdWriteCom(0x80); //设置数据指针起点 LcdClean(); } void LcdWritestr(uchar *dat) //向LCD写入多个字节的数据 { while(*dat != '\0') { LcdWriteData(*dat); dat++; } } void Delay1ms() //@11.0592MHz { unsigned char i, j; _nop_(); _nop_(); _nop_(); i = 11; j = 190; do { while (--j); } while (--i); } void key()//按键操作函数 { if(k1==0) //判断 { Delay1ms(); //消抖处理 if(k1==0) //在判断 { //设置 led_flag=1; P1=0X00; }while(k1==0); } if(k2==0) { Delay1ms(); if(k2==0) //加 { led_flag=0; P1=0XFF; }while(k2==0); } } void display_data(void)///显示 { if(led_flag==1) { LcdWriteCom(0x80); //第一行 LcdWritestr("LED:ON "); uartSendStr("LED:ON ",7); } else if(led_flag==0) { LcdWriteCom(0x80); //第一行 LcdWritestr("LED:OFF"); uartSendStr("LED:OFF",7); } } void UART_Init(void) { SCON = 0x50; // SCON: 模式 1, 8-bit UART, 使能接收 TMOD |= 0x20; // TMOD: timer 1, mode 2, 8-bit 重装 TH1 = 0xFD; // TH1: 重装值 9600 波特率 晶振 11.0592MHz TL1 = TH1; TR1 = 1; // TR1: timer 1 打开 EA = 1; //打开总中断 ES = 1; //打开串口中断 } void uartSendByte(unsigned char dat) { unsigned char time_out; time_out=0x00; SBUF = dat; //将数据放入SBUF中 while((!TI)&&(time_out<100)) //检测是否发送出去 {time_out++;DelayUs2x(10);} //未发送出去 进行短暂延时 TI = 0; //清除ti标志 } void uartSendStr(unsigned char *s,unsigned char length) { unsigned char NUM; NUM=0x00; while(NUM<length) //发送长度对比 { uartSendByte(*s); //放松单字节数据 s++; //指针++ NUM++; //下一个++ } } void UART_SER (void) interrupt 4 //串行中断服务程序 { if(RI) //判断是接收中断产生 { RI=0; //标志位清零 reseve_flag = SBUF; } if(TI) //如果是发送标志位，清零 TI=0; switch(reseve_flag) { case (0+0x30): led_flag=1; P1=0X00; break; case (1+0x30): led_flag=0; P1=0XFF;break; default: break; } } void main() { LcdInit();//1602初始化 UART_Init();//串口初始化 while(1) { display_data(); delay_ms(1000); key(); //调用按键 } }