RF communication between Uno and MSP430G2553

Using Arduino Microcontrollers
1

I'm trying to send data from MSP430 to Arduino using Nrf24l01 but my code doesn't seem to work . Also which of MOSI or MISO should be used for one direction communication ?

//Transmitter Code(MSP430G2553)

#include <SPI.h>
#include <Enrf24.h>
#include <nRF24L01.h>
#include <string.h>

Enrf24 radio(P2_0, P2_1, P2_2);  // P2.0=CE, P2.1=CSN, P2.2=IRQ
const uint8_t txaddr[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0x01 };

const char *str_on = "ON";
const char *str_off = "OFF";

void dump_radio_status_to_serialport(uint8_t);

  int val = 420;
void setup() {
  Serial.begin(9600);

  SPI.begin();
  SPI.setDataMode(SPI_MODE0);
  SPI.setBitOrder(MSBFIRST);

  radio.begin();  // Defaults 1Mbps, channel 0, max TX power
  dump_radio_status_to_serialport(radio.radioState());
  radio.setTXaddress((void*)txaddr);
}

void loop() {
  Serial.print("Sending packet: ");
  Serial.println(str_on);
  
  radio.print(val);
  radio.flush();  // Force transmit (don't wait for any more data)
  dump_radio_status_to_serialport(radio.radioState());  // Should report IDLE
  delay(1000);

  Serial.print("Sending packet: ");
  Serial.println(str_off);
  radio.print(val);
  radio.flush();  //
  dump_radio_status_to_serialport(radio.radioState());  // Should report IDLE
  delay(1000);
}

void dump_radio_status_to_serialport(uint8_t status)
{
  Serial.print("Enrf24 radio transceiver status: ");
  switch (status) {
    case ENRF24_STATE_NOTPRESENT:
      Serial.println("NO TRANSCEIVER PRESENT");
      break;

    case ENRF24_STATE_DEEPSLEEP:
      Serial.println("DEEP SLEEP <1uA power consumption");
      break;

    case ENRF24_STATE_IDLE:
      Serial.println("IDLE module powered up w/ oscillators running");
      break;

    case ENRF24_STATE_PTX:
      Serial.println("Actively Transmitting");
      break;

    case ENRF24_STATE_PRX:
      Serial.println("Receive Mode");
      break;

    default:
      Serial.println("UNKNOWN STATUS CODE");
  }
}

Receiver Code(Arduino)

#include <SPI.h>

// RF24 - Version: Latest 
#include <RF24.h>
#include <RF24_config.h>
#include <nRF24L01.h>
#include <printf.h>


RF24 radio(7, 8);

const uint8_t pipe[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0x01 };

void setup()
{
  while (!Serial);
  Serial.begin(9600);
  
  radio.begin();
  radio.openReadingPipe(0,pipe);
  
  radio.startListening();
}

void loop()
{
  if (radio.available())
  {
    int text;
    radio.read(&text, sizeof(text));
    
    Serial.println(text);
    Serial.println("Complete");
    delay(100);
  }
}
2

Both miso and mosi must be connected to talk to the NRF24. Even though data is only being sent in one direction between the two radios, the NRF24 needs bidirectional communication with the arduino.

3

I connected both MOSI and MISO and my MSP is now properly transmitting. But, the Arduino seems to receive garbage values of 128, although I am sending the value 420. I tried changing the value, but I still keep on getting the same value 128. help?

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4

Anyone with an idea?

5

In the arduino RF24 library, the arguments for openReadingPipe function are channel number and address of the pipe.
But, in the msp code, they are using something called setTxaddress. Do I set this address the same as my pipe address?