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 <p18cxxx.h>
#include <spi.h>
#include <timers.h>

// 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 <p18cxxx.h>
#include <spi.h>
#include <timers.h>

// 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;    
 	spi_Send_Read(0xE2);    
    SPI_CSN = 1;
    SPI_CSN = 0;
 
	//reset int    
  	spi_Send_Read(0x27);
	spi_Send_Read(0x40);    
    SPI_CSN = 1;
}




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)
		;


}





用PICKIT3 DEBUGER 看SSPBUF 来test addr

/*
** test.c
** SPI test program for PIC18F4520 and nRF24L01 or nRF24L01+
** Checks SPI comms between PIC and wireless chip
** 
** RA0	LED (output)
** RA1	PB (input)
*/

#include <p18f4520.h>
#include <spi.h>

//function prototypes
unsigned char spi_Send_Read(unsigned char);

// 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			LATAbits.LATA0
#define PB			PORTAbits.RA1


// Macros
#define nop() _asm nop _endasm

void main(void)
{
	unsigned char status = 0;
	unsigned char data[5];
	int i;

	// run internal oscillator at 8 MHz
	OSCCON = OSCCON | 0x70;
	while (OSCCONbits.IOFS == 0)
		;

	OpenSPI(SPI_FOSC_16, MODE_00, SMPMID); //open SPI1
	PORTA = 0x00;
	ADCON1 = 0x0F;		// set up PORTA to be digital I/Os
	TRISA = 0x02;		// PORTA<7.2,0> outputs PORTA<1> input
	TRISCbits.TRISC3 = 0;	// SDO output
	TRISCbits.TRISC5 = 0;   // SCK output
	TRISCbits.TRISC4 =1;
	TRISCbits.TRISC2 = 0;	// CSN output
	TRISCbits.TRISC1 = 0;	// CE output
	SPI_CSN = 1;		// CSN high
	SPI_SCK = 0;		// SCK low
	SPI_CE	= 0;		// CE low
	nop();

	//write TX_ADDRESS register
	SPI_CSN = 0;			//CSN low
	spi_Send_Read(0x30);
	spi_Send_Read(0x11);
	spi_Send_Read(0x22);
	spi_Send_Read(0x33);
	spi_Send_Read(0x44);
	spi_Send_Read(0x55);
	SPI_CSN = 1;			//CSN high


	//read TX_ADDRESS register
	//Check that values are correct using the MPLAB debugger
	SPI_CSN = 0;			//CSN low
	status = spi_Send_Read(0x10);
	data[0] = spi_Send_Read(0x00);	// 0x11
	data[1] = spi_Send_Read(0x00);	// 0x22
	data[2] = spi_Send_Read(0x00);	// 0x33
	data[3] = spi_Send_Read(0x00);	// 0x44
	data[4] = spi_Send_Read(0x00);	// 0x55
	SPI_CSN = 1;			//CSN high

	// test PB and LED
	while(1)
	{
		if (!PB)
			LED = 1;
		else
			LED = 0;
	}
}


unsigned char spi_Send_Read(unsigned char byte)
{
	SSPBUF = byte;	
	while(!DataRdySPI())
		;	
	return SSPBUF;
}	



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