LED Won't Blink With radio.begin In Sketch

Projects General Guidance
1

Using an UNO R3, I can't make the onboard LED blink when I have radio.begin un-commented in the following sketch. The LED blinks as intended without radio.begin in the setup. I've tried using digital.write and also tried using direct port manipulation. Could someone please tell me what I'm doing wrong?

#include <RF24.h>

RF24 radio(9, 10); // CE, CSN
const byte address[6] = "00001";

int LEDPwr = 13;

void setup()
{
  //radio.begin();
  pinMode(LEDPwr, OUTPUT);
  digitalWrite (LEDPwr, LOW);
}
void loop()
{
  digitalWrite (LEDPwr, HIGH);
  _delay_ms(500);
  digitalWrite (LEDPwr, LOW);
  _delay_ms(500);
}

Thanks for any help.

TABEAR

2

Pin 13 is also the SPI SCK (serial clock) pin. The radio uses the SPI pins (13, 12 and 11). Use a different pin for your LED if you want to use the radio.

3

Yes an LED on pin 7 works fine.

Is the radio library running something in the background?

a7