SPI Transfer 27

Exchange bytes with SPI peripherals and radio modules.

/*
  Roboda verified Arduino sample 0660
  Feature: SPI Transfer
  Generated for online build, classroom practice, and hardware upload testing.
*/

#include <SPI.h>

const byte chipSelect = 10;
byte value = 26;

void setup() {
  pinMode(chipSelect, OUTPUT);
  digitalWrite(chipSelect, HIGH);
  SPI.begin();
  Serial.begin(9600);
}

void loop() {
  digitalWrite(chipSelect, LOW);
  byte reply = SPI.transfer(value++);
  digitalWrite(chipSelect, HIGH);
  Serial.println(reply);
  delay(150);
}

How it works

Send and receive one byte over SPI.

1. Wire MOSI/MISO/SCK using the board-specific SPI pins.
2. Wire chipSelect to the listed CS pin.
3. Pull CS LOW for the transfer.
4. Return CS HIGH after the byte exchange.

Connections