RadioHead
RasPiRH.cpp
// RasPiRH.cpp
//
// Example program showing how to use RH_NRF24 on Raspberry Pi
// Uses the bcm2835 library to access the GPIO pins to drive the NRF24L01
// Requires bcm2835 library to be already installed
// http://www.airspayce.com/mikem/bcm2835/
// Use the Makefile in this directory:
// cd example/raspi
// make
// sudo ./RasPiRH
//
// Creates a RHReliableDatagram manager and listens and prints for reliable datagrams
// sent to it on the default Channel 2.
//
// Contributed by Mike Poublon
#include <bcm2835.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <RHReliableDatagram.h>
#include <RH_NRF24.h>
//Function Definitions
void sig_handler(int sig);
void printbuffer(uint8_t buff[], int len);
#define CLIENT_ADDRESS 1
#define SERVER_ADDRESS 2
// Create an instance of a driver
// Chip enable is pin 22
// Slave Select is pin 24
RH_NRF24 nrf24(RPI_V2_GPIO_P1_22, RPI_V2_GPIO_P1_24);
RHReliableDatagram manager(nrf24, SERVER_ADDRESS);
//Flag for Ctrl-C
volatile sig_atomic_t flag = 0;
//Main Function
int main (int argc, const char* argv[] )
{
signal(SIGINT, sig_handler);
if (!bcm2835_init())
{
printf( "\n\nRasPiRH Tester Startup Failed\n\n" );
return 1;
}
printf( "\nRasPiRH Tester Startup\n\n" );
/* Begin Driver Only Init Code
if (!nrf24.init())
Serial.println("init failed");
// Defaults after init are 2.402 GHz (channel 2), 2Mbps, 0dBm
if (!nrf24.setChannel(1))
Serial.println("setChannel failed");
if (!nrf24.setRF(RH_NRF24::DataRate2Mbps, RH_NRF24::TransmitPower0dBm))
Serial.println("setRF failed");
End Driver Only Init Code */
/* Begin Reliable Datagram Init Code */
if (!manager.init())
{
printf( "Init failed\n" );
}
/* End Reliable Datagram Init Code */
uint8_t buf[RH_NRF24_MAX_MESSAGE_LEN];
//Begin the main body of code
while (true)
{
uint8_t len = sizeof(buf);
uint8_t from, to, id, flags;
/* Begin Driver Only code
if (nrf24.available())
{
// Should be a message for us now
//uint8_t buf[RH_NRF24_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if (nrf24.recv(buf, &len))
{
Serial.print("got request: ");
Serial.println((char*)buf);
Serial.println("");
}
else
{
Serial.println("recv failed");
}
}
End Driver Only Code*/
/* Begin Reliable Datagram Code */
if (manager.available())
{
// Wait for a message addressed to us from the client
uint8_t len = sizeof(buf);
uint8_t from;
if (manager.recvfromAck(buf, &len, &from))
{
Serial.print("got request from : 0x");
Serial.print(from, HEX);
Serial.print(": ");
Serial.println((char*)buf);
}
}
/* End Reliable Datagram Code */
if (flag)
{
printf("\n---CTRL-C Caught - Exiting---\n");
break;
}
//sleep(1);
delay(25);
}
printf( "\nRasPiRH Tester Ending\n" );
bcm2835_close();
return 0;
}
void sig_handler(int sig)
{
flag=1;
}
void printbuffer(uint8_t buff[], int len)
{
for (int i = 0; i< len; i++)
{
printf(" %2X", buff[i]);
}
}