spi_basic.ino

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/***************************************************************
 * @file    SPI_Basic.ino
 * @brief   Minimal SPI bring-up for 7Semi ICM-20948 +
 *          basic Accel/Gyro/Temp readout (updated API).
 *
 * Features
 * - SPI init (UNO / ESP32)
 * - beginSPI() initialization
 * - Manual sensor enable
 * - Read Accel / Gyro / Temp
 *
 * Notes
 * - WHO_AM_I must be 0xEA
 * - Sensors must be explicitly enabled
 * - SPI speed ~1MHz recommended during init
 *
 * Wiring (Arduino UNO SPI)
 * - SCK  -> D13
 * - MOSI -> D11
 * - MISO -> D12
 * - CS   -> D10 (changeable; update CS_PIN)
 * - VCC  -> 3V3
 * - GND  -> GND
 *
 * Wiring (ESP32 VSPI default)
 * - SCK  -> D13
 * - MOSI -> D11
 * - MISO -> D12
 * - CS   -> D10
 ***************************************************************/
#include <DevLab_ICM20948.h>
 
/** @brief SPI clock used during sensor initialization and reads. */
#define SPI_FAST_SPEED 1000000
 
/** @brief Global ICM-20948 driver instance. */
DevLab_ICM20948 imu;
 
/** @brief SPI bus object used by the IMU driver. */
SPIClass spi_bus(SPI);
 
/**
 * @brief Initialize Serial and start the ICM-20948 over SPI.
 *
 * @note The sketch expects a board-level CS_PIN definition to select the
 * chip-select pin used by beginSPI().
 */
void setup() {
  Serial.begin(115200);
  delay(200);
 
 
  if (!imu.beginSPI(CS_PIN, spi_bus, 1000000)) {
    Serial.println("ERROR: beginSPI() failed");
    while (1) delay(200);
  }
 
  imu.setSensors(true, true, true);
  Serial.println("Ready.");
}
 
/**
 * @brief Read and print accelerometer, gyroscope, and temperature data.
 */
void loop() {
  float ax, ay, az;
  float gx, gy, gz;
  float tC;
 
  /* Read accelerometer. */
  if (imu.readAccel(ax, ay, az)) {
    Serial.print(F("ACC [g]: "));
    Serial.print(ax, 3); Serial.print(", ");
    Serial.print(ay, 3); Serial.print(", ");
    Serial.println(az, 3);
  } else {
    Serial.println(F("ACC read failed"));
  }
 
  /* Read gyroscope. */
  if (imu.readGyro(gx, gy, gz)) {
    Serial.print(F("GYR [dps]: "));
    Serial.print(gx, 2); Serial.print(", ");
    Serial.print(gy, 2); Serial.print(", ");
    Serial.println(gz, 2);
  } else {
    Serial.println(F("GYR read failed"));
  }
 
  /* Read temperature. */
  if (imu.readTemperature(tC)) {
    Serial.print(F("TMP [C]: "));
    Serial.println(tC, 2);
  } else {
    Serial.println(F("TMP read failed"));
  }
 
  Serial.println(F("-----------------------------"));
  delay(500);
}