/*******************************************
雙機無線收發(fā)接收端程序：
        將無線接收到的字符顯示在PC串口。

修改：將接收的數(shù)據(jù)個數(shù)由原先的緩沖區(qū)大小判斷改成由接收到第一個字節(jié)判斷。
******************************************/

#include <Nordic\reg9e5.h>

#define   HFREQ 0                     // 0=433MHz, 1=868/915MHz     (方便更改）
#define   UART_BUFFER_SIZE    10       //定義串口緩沖區(qū)大小 10 bytes

unsigned char UART_BUFFER[UART_BUFFER_SIZE+1];


//串口發(fā)送1Byte
void PutChar(char c)
{
    while(!TI)			            //Wait until finished seri-port transmitting
        ;
	TI = 0;			               //Clear interrupt flag
    SBUF = c;			           //sending a byte
}

//串口發(fā)送字符串
void PutString(const char *s,unsigned char strlen)
{
    unsigned char k;
	//EIE &= 0xF0;
    for(k=1;k<=strlen;k++)
       {
         PutChar(*(s+k));
       }
	//EIE |= 0x0F;
}


unsigned char SpiReadWrite(unsigned char b)
{
    EXIF &= ~0x20;                  // Clear SPI interrupt        (EXIP.5=0)
    SPI_DATA = b;                   // Move byte to send to SPI data register
    while((EXIF & 0x20) == 0x00)    // Wait until SPI hs finished transmitting   (測試EXIF.5的狀態(tài))
          ;
    return SPI_DATA;
}


void Receiver(void)
{
    unsigned char i=0;
    TXEN = 0;
    TRX_CE = 1;                     //進入接收模式
    while(DR == 0)                  //DR=0表示數(shù)據(jù)未準(zhǔn)備好，等待
        ;

    TRX_CE=0;                       //進入待機模式才可讀寫SPI
    RACSN = 0;                      //內(nèi)部SPI開始等待命令（1到0的跳變）
    SpiReadWrite(RRP);  
/*
while(DR == 1)
{ 	UART_BUFFER[i] = SpiReadWrite(0); 
    i++;
}
*/            		
	UART_BUFFER[0] = SpiReadWrite(0); 
	for(i=1;i<=UART_BUFFER[0];i++)   //****修改處*****
	{
		UART_BUFFER[i] = SpiReadWrite(0); 		 
	}
	P04 = ~P04;
    RACSN = 1;
//    TRX_CE = 1;                     //這時MCU才從SPI讀數(shù)據(jù)
}

void UART_Init(void)                //nRF9E5串口初始化
{
    TH1 = 0xE6;                      // 9600@16MHz (when T1M=1 and SMOD=1)
    CKCON |= 0x30;                  // T1M=1 (/4 timer clock)
    PCON = 0x80;                    // SMOD=1 (double baud rate)
    SCON = 0x52;                    // Serial mode1, enable receiver
    TMOD = 0x20;                    // Timer1 8bit auto reload 
    TR1 = 1;                        // Start timer1  
    P0_ALT |= 0x06;
    P0_DIR  = 0xA2;                 // P0.1 (RxD) is input
}

void Init(void)                     //nRF9E5無線模塊初始化
{
    unsigned char tmp,cklf;
    SPICLK = 0;                     // Max SPI clock
    SPI_CTRL = 0x02;                // Connect internal SPI controller to Radio

    // Configure Radio:
    RACSN = 0;
    SpiReadWrite(WRC | 0x03);       // Write to RF config address 3 (RX payload)
    SpiReadWrite(0x01);             // One byte RX payload
    SpiReadWrite(0x01);             // One byte TX payload
    RACSN = 1;

    RACSN = 0;
    SpiReadWrite(RRC | 0x01);       // Read RF config address 1
    tmp = SpiReadWrite(0) & 0xf1;   // Clear the power and frequency setting bits  
                                    //PA_PWR[1:0]=00(輸出電源-10dBm）Bit1：HFREQ_PLL=0（433MHz)
    RACSN = 1;

    RACSN = 0;
    SpiReadWrite(WRC | 0x01);           // Write RF config address 1
    SpiReadWrite(tmp | (HFREQ << 1));   // Change to 433 or 868/915MHz defined by HFREQ above:
    RACSN = 1;


    // 將時鐘頻率改為16MHz:
    RACSN = 0;
    SpiReadWrite(RRC | 0x09);
    cklf = SpiReadWrite(0) | 0x1c;
    RACSN = 1;
    RACSN = 0;
    SpiReadWrite(WRC | 0x09);
    SpiReadWrite(cklf);
    RACSN = 1;


    RACSN = 0;
    SpiReadWrite(WRC | 0x05);       //設(shè)置本接收器可接受的地址,與tx433里的配置一樣才可通信
    SpiReadWrite(0x18);
    SpiReadWrite(0x32);
    SpiReadWrite(0x40);
    SpiReadWrite(0xAF);
    RACSN = 1;

    RACSN = 0;
    SpiReadWrite(WRC | 0x03);       //設(shè)置本接收器可接受的數(shù)據(jù)寬度,與tx433里的配置一樣才可通信
    SpiReadWrite(0x20);             //接受數(shù)據(jù)寬度為32個字節(jié)
    RACSN = 1;


}

void main(void)
{
    Init();
    UART_Init();
//    EA=1;
//    ES=1;

    while(1)
     { 
      Receiver();
      PutString(UART_BUFFER,UART_BUFFER[0]);
     }
}