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Arduino Quick Start

2. Devices & Examples

5. Extensions

6. Applications

StopWatch IMU

StopWatch IMU-related input APIs and sample programs.

Example

Compilation Requirements

  • M5Stack Board Manager Version >= 3.3.7
  • Board Option = M5StopWatch
  • M5Unified Library Version >= 0.2.15
  • M5GFX Library Version >= 0.2.21
cpp
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#include <M5Unified.h>

void setup(void) {
    auto cfg = M5.config();
    M5.begin(cfg);
    M5.Display.setFont(&fonts::FreeMonoBold12pt7b);
    Serial.begin(115200);
}

void loop(void) {
    auto imu_update = M5.Imu.update();
    if (imu_update) {
        auto data = M5.Imu.getImuData();

        // The data obtained by getImuData can be used as follows.
        data.accel.x;      // accel x-axis value.
        data.accel.y;      // accel y-axis value.
        data.accel.z;      // accel z-axis value.
        data.accel.value;  // accel 3values array [0]=x / [1]=y / [2]=z.

        data.gyro.x;      // gyro x-axis value.
        data.gyro.y;      // gyro y-axis value.
        data.gyro.z;      // gyro z-axis value.
        data.gyro.value;  // gyro 3values array [0]=x / [1]=y / [2]=z.

        data.value;  // all sensor 9values array [0~2]=accel / [3~5]=gyro / [6~8]=mag

        Serial.printf("ax: %f  ay: %f  az: %f\r\n", data.accel.x, data.accel.y, data.accel.z);
        Serial.printf("gx: %f  gy: %f  gz: %f\r\n", data.gyro.x, data.gyro.y, data.gyro.z);
        M5.Display.setCursor(40, 120);
        M5.Display.clear();  // Delay 100ms
        M5.Display.printf("IMU:\r\n");
        M5.Display.printf("       ax: %f\n       ay: %f\n       az: %f\r\n", data.accel.x, data.accel.y, data.accel.z);
        M5.Display.printf("       gx: %f\n       gy: %f\n       gz: %f\r\n", data.gyro.x, data.gyro.y, data.gyro.z);
    }
    delay(300);
}

After uploading successfully, you can view the IMU sensor acceleration and gyroscope data in the serial monitor and on the screen.

API

The StopWatch IMU section uses the IMU_Class from the M5Unified library. For more IMU-related APIs, refer to the following document:

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