复件 tx433.c

24e1根据接收字节判断的无线发送程序

/*******************************************
无线接收的发送收端程序：
将从串口接收到的字符发送出去。

******************************************/

#include <Nordic\reg24e1.h>

struct RFConfig
{
	unsigned char n;
	unsigned char buf[15];
};

typedef struct RFConfig RFConfig;

const RFConfig txconf =
{
    15,
    0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x12, 0x34, 0x56, 0x78, 0x83, 0x6c, 0x04
};

const RFConfig rxconf =
{
    15,
    0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x87, 0x65, 0x43, 0x21, 0x83, 0x6c, 0x05
};

#define ADDR_INDEX  8   // Index to address bytes in RFConfig.buf
#define ADDR_COUNT  4   // Number of address bytes
#define    UART_BUFFER_SIZE    8                   //定义串口接收缓冲区大小 8 bytes，最大为31

unsigned char  UART_BUFFER[UART_BUFFER_SIZE+1];      //定义串口接收数据缓冲区
unsigned char  countt=0;                           //
bit    Overtime_Flag=0;

unsigned int  Tnum=500;


//延时函数
void Delay100us(volatile unsigned char n)
{
    unsigned char i;
    while(n--)
        for(i=0;i<35;i++)
            ;
}

//超时计时定时器T0初始化
void Time0_Init(void)
{
    TMOD &= 0xF0;          //定时器/计数器T0为定时器，工作于方式2，以TR0启动定时器
    TMOD |= 0x02;
    CKCON |= 0x08;         // T0M=1 (/4 timer clock)
    TL0=0x38;              //16MHz下定时时间为50us
    TH0=0x38;           
	TR0=1;               //启动定时器T0
    ET0=1;                 //允许定时器T0中断
    Overtime_Flag=0;       //清除超时标志
}

//定时器T0中断服务子程序
void Timer0_ISR (void) interrupt 1
{
     TF0=0;
     Tnum--;                 //计时100ms(中断次数计数)，实际需34ms
     if(Tnum==0)             //超时？
      {
//       ET0=0;               //T0关中断
		TR0=0;               //关闭定时器T0
        Overtime_Flag=1;     //置位超时标志,开始发送
	    P06=~P06;
      }
}

//串口接收中断函数 
void serial_ISR (void) interrupt 4
{
    if(RI)
      {
          unsigned char ch;          
          RI = 0;
          ch = SBUF;
		  //TR0=1;
          if(Overtime_Flag==0)                //未超时就接收
           {
              if(countt==UART_BUFFER_SIZE)
				  countt=0;
              countt++;  
              UART_BUFFER[countt]=ch;
              UART_BUFFER[0]=countt;
           }  
      }
    if(TI) 
    {
//     	TI=0;
		return;
    }
}

unsigned char SpiReadWrite(unsigned char b)
{
    EXIF &= ~0x20;                  // Clear SPI interrupt
    SPI_DATA = b;                   // Move byte to send to SPI data register
    while((EXIF & 0x20) == 0x00)    // Wait until SPI hs finished transmitting
           ;
    return SPI_DATA;
}


void Transmitter(unsigned char *str,unsigned char strlen)
{
    unsigned char j=0;
    CE = 1;                  
 	Delay100us(0);	
    for(i=0;i<ADDR_COUNT;i++)		// Start with the address of the receiver:
        SpiReadWrite(rxconf.buf[ADDR_INDEX+i]);
    SpiReadWrite(b); 
    CE = 0;
	Delay100us(3);           // Wait ~300us
    P00=~P00;
	//countt=0;
}

void Init(void)
{    
	unsigned char b;
	PWR_UP=1;
    Delay100us(30);                 // Wait > 3ms 
    SPICLK = 0;                     // Max SPI clock (XTAL/8)
    SPI_CTRL = 0x02;                // Connect internal SPI controller to Radio

    TH1 = 0xE6;                      // 9600@16MHz (when T1M=1 and SMOD=1)
    CKCON |= 0x10;                  // T1M=1 (/4 timer clock)
    PCON = 0x80;                    // SMOD=1 (double baud rate)
    SCON = 0x50;                    // Serial mode1, enable receiver
    TMOD = 0x20;                    // Timer1 8bit auto reload 
    TR1 = 1;                        // Start timer1  
    P0_ALT |= 0xC6;				    // Select alternate functions on pins P0.1 and P0.2
    P0_DIR |= 0x02;                 // P0.1 (RxD) is input


    // Configure Radio:
    CS = 1;
    Delay100us(0);
    for(b=0;b<txconf.n;b++)
    {
        SpiReadWrite(txconf.buf[b]);
    }
    CS = 0;


}

void main(void)
{
    Init();
	Time0_Init();  //T0初始化
    EA=1;
    ES=1;
	//PT0=1;  //定时器T0为高优先级
   
    while(1)
     {
        if(Overtime_Flag)       //如果取数标志已置位，就将读到的数无线发送
        {
			ES=0;
            Overtime_Flag=0;   //取数标志清0
			if(countt) 
            	Transmitter(UART_BUFFER,(UART_BUFFER[0]+1));

            countt=0;
			Tnum=500;
			TL0=0x38;              //16MHz下定时时间为50us
			TR0=1;
			ES=1;
        }         
    }  

}