#include <SPI.h>
// The setup() function runs once each time the micro-controller starts
void setup()
{
    //Initialize serial and wait for port to open:
    Serial.begin(9600);
    while (!Serial) {
        ; // wait for serial port to connect. Needed for native USB
    }
    /*
    test area
    *//*
    SPI.begin(52);         // SPI Module 'wake up'
    SPI.setClockDivider(52, SPI_CLOCK_DIV128 );
    SPI.setDataMode(52, SPI_MODE0);
    SPI.setBitOrder(52, MSBFIRST);
    delay(200);          // SPI delay for initialization
    */
    SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0)); // SPI setup SPI communication
    SPI.begin(52);

    while (true)
    {
        SPI.transfer(52, 0xAA, SPI_LAST);
        delay(20);
    }
}

void loop()
{
}

SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
delay(200);
SPI.begin();
SPI.transfer(0xAA);