#include #define SPIDEVICE_CS 10 Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS, 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1); // Adafruit_SPIDevice spi_dev = Adafruit_SPIDevice(SPIDEVICE_CS, 13, 12, 11, // 100000, SPI_BITORDER_MSBFIRST, SPI_MODE1); void setup() { while (!Serial) { delay(10); } Serial.begin(115200); Serial.println("SPI device mode test"); if (!spi_dev.begin()) { Serial.println("Could not initialize SPI device"); while (1) ; } } void loop() { Serial.println("\n\nTransfer test"); for (uint16_t x = 0; x <= 0xFF; x++) { uint8_t i = x; Serial.print("0x"); Serial.print(i, HEX); spi_dev.read(&i, 1, i); Serial.print("/"); Serial.print(i, HEX); Serial.print(", "); delay(25); } }