Hello, I have project to do, but I have too less knowledge about NRF's, I've tried almost all information sources and libraries, but no results. I have to make, that one PIC sends 5 bytes of data, and other do something with that data. But at first I'm playing only with switches, if HIGH led on other PIC High too. There's a codes.
TX:
#include "mcc_generated_files/mcc.h"
#define _XTAL_FREQ 16000000
unsigned char data;
void pulse(void);
void configure_transmitter(void);
void siuntimas(void);
void transmit_data(void);
#define nop() _asm nop _endasm
void main(void) {
SYSTEM_Initialize();
SPI1_Initialize();
int i = 1;
while(i < 10){
LED1 = HIGH;
LED2 = HIGH;
__delay_ms(10);
__delay_ms(10);
LED1 = LOW;
LED2 = LOW;
__delay_ms(10);
__delay_ms(10);
i++;
}
__delay_ms(10);
configure_transmitter();
//LED1 = HIGH;
__delay_ms(10);
while (1) {
//============================
if(SW == 1){
data = 1;
LED1 = HIGH;
__delay_ms(10);
}
else if(SW == 0)
{
data = 1;
LED1 = LOW;
__delay_ms(10);
}
__delay_ms(10);
__delay_ms(10);
//transmit_data();
__delay_ms(10);
siuntimas();
}
}
void configure_transmitter(void)
{
SPI1_Initialize();
CE = 0;
CSN = 0;
// PTX, CRC enabled, mask a couple of ints
SPI1_Exchange8bit(0x20);
SPI1_Exchange8bit(0x38);
pulse();
//auto retransmit off
SPI1_Exchange8bit(0x24);
SPI1_Exchange8bit(0x00);
pulse();
//address width = 5
SPI1_Exchange8bit(0x23);
SPI1_Exchange8bit(0x03);
pulse();
//data rate = 1MB
SPI1_Exchange8bit(0x26);
SPI1_Exchange8bit(0x07);
pulse();
//set channel 2, this is default but we did it anyway...
SPI1_Exchange8bit(0x25);
SPI1_Exchange8bit(0x02);
pulse();
//set address E7E7E7E7E7, also default...
SPI1_Exchange8bit(0x30);
for (int j = 0; j < 5; j++)
{
SPI1_Exchange8bit(0xE7);
}
pulse();
//disable auto-ack, RX mode
//shouldn't have to do this, but it won't TX if you don't
SPI1_Exchange8bit(0x21);
SPI1_Exchange8bit(0x00);
CSN = 1;
}
void pulse(void)
{
CSN = 1;
__delay_us(10);
CSN = 0;
}
void siuntimas()
{
transmit_data();
//CSN = 0;
//SPI1_Exchange8bit(data);
//CSN = 1;
//pulse();
}
void transmit_data(void)
{
CSN = 0;
//clear previous ints
SPI1_Exchange8bit(0x27);
SPI1_Exchange8bit(0x7E);
pulse();
//PWR_UP = 1
SPI1_Exchange8bit(0x20);
SPI1_Exchange8bit(0x3A);
pulse();
//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
SPI1_Exchange8bit(0xE1);
pulse();
//4 byte payload
SPI1_Exchange8bit(0xA0);
SPI1_Exchange8bit(0x34);
SPI1_Exchange8bit(0x33);
SPI1_Exchange8bit(0x32);
SPI1_Exchange8bit(0x31);
SPI1_Exchange8bit(data);
CSN = 1;
//Pulse CE to start transmission
CE = 1;
__delay_ms(10);
CE = 0;
int j = 1;
while(j < 10){
LED2 = HIGH;
__delay_ms(10);
__delay_ms(10);
LED2 = LOW;
__delay_ms(10);
__delay_ms(10);
j++;
}
}
And RX:
#include "mcc_generated_files/mcc.h"
//============================================================
//============================================================
#define _XTAL_FREQ 16000000
int data;
unsigned char nrf_SPI_Read(unsigned char reg);
void configure_RX(void);
void reset_RX(void);
void read(void);
void pulse(void);
void main(void) {
SYSTEM_Initialize();
int i = 1;
while(i < 10){
LED1 = HIGH;
LED2 = HIGH;
__delay_ms(10);
__delay_ms(10);
LED1 = LOW;
LED2 = LOW;
__delay_ms(10);
__delay_ms(10);
i++;
}
SPI1_Initialize();
configure_RX();
while (1) {
LED1 = LOW;
if (IRQ == 0){
LED1 = HIGH;
}
else if (IRQ == 1){
LED1 = 0;
}
//nrf_SPI_Read(data);
read();
if(data == 1){
LATBbits.LATB4 = HIGH;
LATBbits.LATB5 = LOW;
}
else if (data == 0)
{
LATBbits.LATB4 = LOW;
LATBbits.LATB5 = HIGH;
}
__delay_ms(10);
__delay_ms(10);
reset_RX();
//__delay_ms(10);
}
return;
}
//============================================================
void read(void)
{
LED2 = HIGH;
data = SPI1_Exchange8bit(0xFF);
__delay_ms(10);
LED2 = LOW;
}
//============================================================
void configure_RX(void)
{
unsigned char j;
CSN = 0;
CE = 0;
//PRX, CRC enabled
SPI1_Exchange8bit(0x20);
SPI1_Exchange8bit(0x39);
pulse();
//disable auto-ack for all channels
SPI1_Exchange8bit(0x21);
SPI1_Exchange8bit(0x00);
pulse();
//address width = 5 bytes
SPI1_Exchange8bit(0x23);
SPI1_Exchange8bit(0x03);
pulse();
//data rate = 1MB
SPI1_Exchange8bit(0x26);
SPI1_Exchange8bit(0x07);
pulse();
//4 byte payload
SPI1_Exchange8bit(0x31);
SPI1_Exchange8bit(0x04);
pulse();
//set channel 2
SPI1_Exchange8bit(0x25);
SPI1_Exchange8bit(0x02);
pulse();
//set address E7E7E7E7E7
SPI1_Exchange8bit(0x30);
for (j = 0; j < 5; j++){
SPI1_Exchange8bit(0xE7);
}
pulse();
//PWR_UP = 1
SPI1_Exchange8bit(0x20);
SPI1_Exchange8bit(0x3B);
pulse();
}
//============================================================
void reset_RX(void)
{
SPI1_Initialize();
unsigned char j;
unsigned char buffer[4];
//Read RX payload
CSN = 0;
SPI1_Exchange8bit(0x61);
for (j = 0; j < 4; j++)
{
buffer[j] = SPI1_Exchange8bit(0);
}
CSN = 1;
//Flush RX FIFO
CSN = 0;
SPI1_Exchange8bit(0xE2);
pulse();
//reset int
SPI1_Exchange8bit(0x27);
SPI1_Exchange8bit(0x40);
CSN = 1;
}
void pulse(void)
{
CSN = 1;
__delay_us(10);
CSN = 0;
}
unsigned char nrf_SPI_Read(unsigned char reg) {
unsigned char data;
CSN = 0; // CSN low, initialize SPI communication...
SPI1_Exchange8bit(reg); // Select register to read from..
data = SPI1_Exchange8bit(0); // ..then read register value
CSN = 0; // CSN high, terminate SPI communication
return(data); // return register value
}
