serial_comm_2.c

单片机像计算机发送、接收数据、串口中断、蓝牙通讯

/**********************************************
*   File: Serial_Comm_2.C
*   Description: Serial Communication Example 2 Echo
*   Created Date:  2007-10-01
*   Last Modified: 2007-10-01
*   Author: Jeffrey - [e-mail]
*   Notes: None
**********************************************/
#include "Atmel/AT89X51.h"

void RS232_SendData(unsigned char Sdata);

/**********************************************
*   Function: delay(unsigned int t)
*   Input Variables: t
*   Return Variables: None
*   Usage: Common Delay Routine, t as the delay time ticks
**********************************************/
void delay(unsigned int t)
{
		for(;t>0;t--);		// 延时循环
}

/**********************************************
*   Function: RS232_Init(void)
*   Input Variables: none
*   Return Variables: None
*   Usage: Init UART
**********************************************/
void RS232_Init()
{
	SCON = 	0x50;		// UART工作于模式1， REN=1 
	TMOD = 	0x20 ;		// Timer1 工业于模式2
	PCON |= 0x80;		// SMOD1 = 1 
	TH1	= 0xF3;			// 波特率9600 Bds at 24MHz 
	TL1	= 0xF3;			// 波特率9600 Bds at 24MHz 
	TR1 = 1; 			// 启动Timer1 
}

/**********************************************
*   Function: main()
*   Input Variables: None
*   Return Variables: None
*   Usage: Program Entry
*********************************************/
void main()
{
		unsigned char RevData;						// 接收数据
		unsigned char LED;						    // LED跑马灯状态
		RS232_Init();								// 初始化UART
		while(1)
		{
				//********************主程序部分*********************//
				while(RI==0);						// 等待接收数据
				RevData = SBUF;						// 读取数据
				LED = ~RevData;						// 设置LED灯状态
				P0 = LED;							// 点亮相应LED
				RS232_SendData(RevData);
				RI = 0;
				//********************主程序部分*********************//
		}
}

/**********************************************
*   Function: RS232_SendData(unsigned char Sdata)
*   Input Variables: unsigned char Sdata
*   Return Variables: none
*   Usage: Send a Char to UART
*********************************************/
void RS232_SendData(unsigned char Sdata)
{
	SBUF = Sdata;		// 发送数据
	while(TI==0);		// 等待发送完毕
	TI = 0;			    // 清除发送结束标志
}