led1.c

来自「我自己写的一个c语言程序」· C语言 代码 · 共 54 行

#include <Nordic\reg9e5.h>
unsigned int js=0;
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 Init(void)
{
    unsigned char cklf;  
    TH1 = 243;                      // 19200@16MHz (when T1M=1 and SMOD=1)
    CKCON |= 0x10;                  // 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 = 0x00;                 // 
    P0_DIR = 0x00;                 // 

    SPICLK = 0;                     // Max SPI clock
    SPI_CTRL = 0x02;                // Connect internal SPI controller to Radio

                                    // Switch to 16MHz clock:
    RACSN = 0;
    SpiReadWrite(RRC | 0x09);
    cklf = SpiReadWrite(0) | 0x04;
    RACSN = 1;
    RACSN = 0;
    SpiReadWrite(WRC | 0x09);
    SpiReadWrite(cklf);
    RACSN = 1;
}


void main(void)
{
    Init();
    while(1)
    {  
     js++;
     if(js==32767)
     {  P01 = ~P01;
        P02 = ~P02;
        P03 = ~P03;
        js=0;
     }
    }
        
}