#include <SPI.h>
const uint32_t CS_PIN = D10; // à adapter à votre cablage
const uint16_t DIG0 = 0x01; // ligne 0
void setup() {
  SPISettings cfgSPI(10000000, MSBFIRST, SPI_MODE0);
  uint16_t trame;
  Serial.begin(115200);
  Serial.println("Boot");
  pinMode(CS_PIN, OUTPUT);
  // SPI Transaction: sends the contents of buffer, and overwrites it with the received data
  uint8_t data = 0x55;

  SPI.beginTransaction(cfgSPI);
  for (uint8_t idx = 0; idx < 8; idx++) {
    trame = (DIG0 + idx) << 8;
    data ^= 0x11; 
    trame |= data;
    digitalWrite(CS_PIN, LOW);
    SPI.transfer(trame);
    SPI.transfer(trame);
    SPI.transfer(trame);
    SPI.transfer(trame);

    digitalWrite(CS_PIN, HIGH); // le front montant provoque le verrouillage des données dans
  }
  SPI.endTransaction();

}
void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}