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Arduino Quick Start

2. Devices & Examples

Fire IMU 6-axis attitude sensor

M5Fire IMU attitude sensor input related APIs and example program.

Example

cpp
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#include <M5Unified.h>
void setup(void) {
auto cfg = M5.config();
M5.begin(cfg);
M5.Display.setTextFont(&fonts::Font4);
M5.Display.setTextSize(1);
}
void loop(void) {
auto imu_update = M5.Imu.update();
if (imu_update) {
M5.Display.setCursor(0, 24);
M5.Display.clear(); // Delay 100ms
auto ImuData = M5.Imu.getImuData();
// The ImuData obtained by getImuData can be used as follows.
ImuData.accel.x; // accel x-axis value.
ImuData.accel.y; // accel y-axis value.
ImuData.accel.z; // accel z-axis value.
ImuData.accel.value; // accel 3values array [0]=x / [1]=y / [2]=z.
ImuData.gyro.x; // gyro x-axis value.
ImuData.gyro.y; // gyro y-axis value.
ImuData.gyro.z; // gyro z-axis value.
ImuData.gyro.value; // gyro 3values array [0]=x / [1]=y / [2]=z.
M5.Display.printf("IMU:\r\n");
M5.Display.printf("ax:%6.2f ay:%6.2f az:%6.2f\r\n", ImuData.accel.x, ImuData.accel.y, ImuData.accel.z);
M5.Display.printf("gx:%6.2f gy:%6.2f gz:%6.2f\r\n", ImuData.gyro.x, ImuData.gyro.y, ImuData.gyro.z);
}
delay(100);
}

This program will display the axis information of attitude sensor on the screen.

API

Fire IMU part uses the IMU_Class in the M5Unified library, for more key related APIs you can refer to the following document:

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