PIC18F4520 + NRF24L01

SI SO应该对调过来用。。

TX

/*

** Tx.c

** Transmit test program for PIC18F4520 and nRF24L01 or nRF24L01+

** Uses the Microchip C18 compiler

** Based on SFE code for the CC5X compiler in 24L01demo_V01.c

*/

#include

#include

#include

// Pragmas

#pragma config OSC = INTIO67

#pragma config PWRT = ON

//#pragma config MCLRE = OFF

#pragma config BOREN = OFF

//function prototypes

void init(void);

void transmit_data(void);

void configure_transmitter(void);

unsigned char spi_Send_Read(unsigned char);

unsigned char spi1_send_read_byte(unsigned char byte);

void dly(unsigned int);

// Defines

#define SPI_SCK LATCbits.LATC3 // Clock pin, PORTC pin 3 

#define SPI_SO LATCbits.LATC5 // Serial output pin, PORTC pin 5 

#define SPI_SI PORTCbits.RC4 // Serial input pin, PORTC pin 4 

#define SPI_CSN LATCbits.LATC2 // CSN output pin, PORTC pin 2

#define SPI_CE LATCbits.LATC1 // CE output pin, PORTC pin 1

#define SPI_IRQ PORTBbits.RB0 // IRQ input pin, PORTB pin 0

#define SPI_SCALE 4              // postscaling of signal 

#define LED LATDbits.LATD1

#define PB PORTAbits.RA1

// Macros

#define nop() _asm nop _endasm

void main(void)

{

init();

configure_transmitter();  

while (1)  

{

transmit_data();

LED = 1;

dly(63973); //200 ms delay

LED = 0;           

dly(40000); //3.27 s delay 

nop();          

}

}

void init(void)

{

// run internal oscillator at 8 MHz

OSCCON = OSCCON | 0x70;

while (OSCCONbits.IOFS == 0)

;

PORTA = 0x00;

PORTD = 0X00;

ADCON1 = 0x0F; // set up PORTA to be digital I/Os

TRISA = 0x02; // PORTA<7.2,0> outputs PORTA<1> input

TRISD = 0XFD;

TRISCbits.TRISC3 = 0; // SDO output

TRISCbits.TRISC4 = 1;

TRISCbits.TRISC5 = 0;   // SCK output

TRISCbits.TRISC2 = 0; // CSN output

TRISCbits.TRISC1 = 0; // CE output

TRISBbits.TRISB0 = 1; // IRQ input

OpenSPI(SPI_FOSC_16, MODE_00, SMPMID); //open SPI1

OpenTimer0( TIMER_INT_OFF &

            T0_16BIT &

            T0_SOURCE_INT &

            T0_PS_1_256 );

}

void configure_transmitter(void)

{

    unsigned char i, j, data, cmd;

    SPI_CE = 0;

    SPI_CSN = 0;

// PTX, CRC enabled, mask a couple of ints    

  spi_Send_Read(0x20);

  spi_Send_Read(0x38);

SPI_CSN = 1; 

    SPI_CSN = 0;

//auto retransmit off

  spi_Send_Read(0x24);    

    spi_Send_Read(0x00);    

    SPI_CSN = 1;

    SPI_CSN = 0;

//address width = 5

    spi_Send_Read(0x23);

  spi_Send_Read(0x03);    

    SPI_CSN = 1;

    SPI_CSN = 0;

//data rate = 1MB

    spi_Send_Read(0x26);

  spi_Send_Read(0x07);

    SPI_CSN = 1; 

    SPI_CSN = 0;

//set channel 2, this is default but we did it anyway...

    spi_Send_Read(0x25);

  spi_Send_Read(0x02);

    SPI_CSN = 1;

    SPI_CSN = 0;

//set address E7E7E7E7E7, also default...

    spi_Send_Read(0x30);    

    for (j = 0; j < 5; j++)

    {

        spi_Send_Read(0xE7);

    }  

    SPI_CSN = 1;

    SPI_CSN = 0;

    //disable auto-ack, RX mode

    //shouldn't have to do this, but it won't TX if you don't

    spi_Send_Read(0x21);

  spi_Send_Read(0x00);

    SPI_CSN = 1;

}

void transmit_data(void)

{

    unsigned char i, data, cmd;   

    SPI_CSN = 0;

//clear previous ints

  spi_Send_Read(0x27);

  spi_Send_Read(0x7E);

SPI_CSN = 1;

    SPI_CSN = 0;

//PWR_UP = 1

    spi_Send_Read(0x20);

  spi_Send_Read(0x3A);

    SPI_CSN = 1;

    SPI_CSN = 0;

    //clear TX fifo

    //the data sheet says that this is supposed to come up 0 after POR, but that doesn't seem to be the case

    spi_Send_Read(0xE1);

    SPI_CSN = 1;

    SPI_CSN = 0;

//4 byte payload

    spi_Send_Read(0xA0);

    spi_Send_Read(0x34);

  spi_Send_Read(0x33);

    spi_Send_Read(0x32);

  spi_Send_Read(0x31);

    SPI_CSN = 1;

    //Pulse CE to start transmission

    SPI_CE = 1;

    dly(65000); //delay 69 ms

    SPI_CE = 0;

}

unsigned char spi_Send_Read(unsigned char byte)

{

SSPBUF = byte;

while(!DataRdySPI())

;

return SSPBUF;

}

void dly(unsigned int c)

{

INTCONbits.TMR0IF = 0;

WriteTimer0(c);

while (INTCONbits.TMR0IF == 0)

;

}

RX

/*

** Rx.c

** Receive test program for PIC18F4520 and nRF24L01 or nRF24L01+

** Uses the Microchip C18 compiler

** Based on SFE code for the CC5X compiler in 24L01demo_V01.c

**

** The LED is flashed five times when data are received.

** The received data in the buffer may be checked using the 

** debugger Watch window.*/

#include

#include

#include

// Pragmas

#pragma config OSC = INTIO67

#pragma config PWRT = ON

#pragma config MCLRE = OFF

#pragma config BOREN = OFF

//function prototypes

void init(void);

void reset_RX(void);

void configure_RX(void);

unsigned char spi_Send_Read(unsigned char);

void dly(unsigned int);

// Defines

#define SPI_SCK LATCbits.LATC3 // Clock pin, PORTC pin 3 

#define SPI_SO LATCbits.LATC5 // Serial output pin, PORTC pin 5 

#define SPI_SI PORTCbits.RC4 // Serial input pin, PORTC pin 4 

#define SPI_CSN LATCbits.LATC2 // CSN output pin, PORTC pin 2

#define SPI_CE LATCbits.LATC1 // CE output pin, PORTC pin 1

#define SPI_IRQ PORTBbits.RB0 // IRQ input pin, PORTB pin 0

#define SPI_SCALE 4              // postscaling of signal 

#define LED LATDbits.LATD1

#define PB PORTAbits.RA1

// Macros

#define nop() _asm nop _endasm

void main(void)

{

unsigned char i;

init();

configure_RX();

while(1)

{

    if (SPI_IRQ == 0)    //wait for anything

        {

            for (i = 0; i < 5; i++)  //flash LED 5 times if data received

            {

                LED = 1;

                dly(63973); // 200 ms delay

                LED = 0;

                dly(63973); // 196 ms

            }

            dly(63973); // 196 ms

            reset_RX();            

        }

}

}

// initialise 18F4520

void init(void)

{

// run internal oscillator at 8 MHz

OSCCON = OSCCON | 0x70;

while (OSCCONbits.IOFS == 0)

;

PORTA = 0x00;

PORTD = 0X00;

ADCON1 = 0x0F; // set up PORTA to be digital I/Os

TRISA = 0x02; // PORTA<7.2,0> outputs PORTA<1> input

TRISD = 0XFD;

TRISCbits.TRISC3 = 0; // SDO output

TRISCbits.TRISC4 = 1;

TRISCbits.TRISC5 = 0;   // SCK output

TRISCbits.TRISC2 = 0; // CSN output

TRISCbits.TRISC1 = 0; // CE output

TRISBbits.TRISB0 = 1; // IRQ input

OpenSPI(SPI_FOSC_16, MODE_00, SMPMID); //open SPI1

OpenTimer0( TIMER_INT_OFF &

            T0_16BIT &

            T0_SOURCE_INT &

            T0_PS_1_256 );

}

//configure nRF24L01 for receive

void configure_RX(void)

{

    unsigned char i, j;

    SPI_CSN = 0;

    SPI_CE = 0;

//PRX, CRC enabled

spi_Send_Read(0x20);

spi_Send_Read(0x39); 

SPI_CSN = 1;   

SPI_CSN = 0;

//disable auto-ack for all channels      

spi_Send_Read(0x21);

spi_Send_Read(0x00);     

SPI_CSN = 1;    

SPI_CSN = 0;

//address width = 5 bytes  

  spi_Send_Read(0x23);

spi_Send_Read(0x03);    

    SPI_CSN = 1;    

    SPI_CSN = 0;

//data rate = 1MB   

  spi_Send_Read(0x26);

spi_Send_Read(0x07);    

    SPI_CSN = 1;

  SPI_CSN = 0;

//4 byte payload  

  spi_Send_Read(0x31);

spi_Send_Read(0x04);    

    SPI_CSN = 1;    

    SPI_CSN = 0;

    //set channel 2 

    spi_Send_Read(0x25);

spi_Send_Read(0x02);    

    SPI_CSN = 1;     

    SPI_CSN = 0;

    //set address E7E7E7E7E7

    spi_Send_Read(0x30);

    for (j = 0; j < 5; j++)

  spi_Send_Read(0xE7); 

    SPI_CSN = 1;  

    SPI_CSN = 0;

//PWR_UP = 1   

  spi_Send_Read(0x20);

spi_Send_Read(0x3B);   

    SPI_CSN = 1;    

    SPI_CE = 1;     

}

void reset_RX(void)

{

    unsigned char i, j;

    unsigned char buffer[4];    

//Read RX payload   

    SPI_CSN = 0;    

    spi_Send_Read(0x61);    

    for (j = 0; j < 4; j++)

    {        

        buffer[j] = spi_Send_Read(0);        

    }    

    SPI_CSN = 1;    

//Flush RX FIFO    

    SPI_CSN = 0;