Paparazzi UAS  v5.12_stable-4-g9b43e9b
Paparazzi is a free software Unmanned Aircraft System.
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imu_aspirin_i2c_common module

Common functionality of Aspirin IMUs using I2C only.

  • Accelerometer: ADXL345 via I2C
  • Gyroscope: ITG3200 via I2C
  • Magnetometer: HMC58xx via I2C

Example for airframe file

Add to your firmware section: This example contains all possible configuration options, not all of them are mandatory!

1 <module name="imu_aspirin_i2c_common">
2  <configure name="ASPIRIN_I2C_DEV" value="i2c2" />
3 </module>

Module configuration options

Configure Options

  • name: ASPIRIN_I2C_DEV value: i2c2
    Description: I2C device to use

Airframe file section

  • section name: IMU prefix: IMU_
    • name MAG_X_NEUTRAL value: 2358
    • name MAG_Y_NEUTRAL value: 2362
    • name MAG_Z_NEUTRAL value: 2119
    • name MAG_X_SENS value: 3.4936416
    • name MAG_Y_SENS value: 3.607713
    • name MAG_Z_SENS value: 4.90788848

Auto-loaded modules

The following modules are automatically loaded (just as if you had added them in the airframe file)

Module functions

Init Functions

These initialization functions are called once on startup.

Event Functions

These event functions are called in each cycle of the module event loop.

Periodic Functions

These functions are called periodically at the specified frequency from the module periodic loop.

  • imu_aspirin_i2c_periodic()
    • Running at maximum module frequency.
    • Autorun: LOCK
      Periodic function automatically starts after init and can't be stopped.


Header Files

The following headers are automatically included in modules.h

Source Files

Raw imu_aspirin_i2c_common.xml file:

<!DOCTYPE module SYSTEM "module.dtd">
<module name="imu_aspirin_i2c_common">
Common functionality of Aspirin IMUs using I2C only.
- Accelerometer: ADXL345 via I2C
- Gyroscope: ITG3200 via I2C
- Magnetometer: HMC58xx via I2C
<configure name="ASPIRIN_I2C_DEV" value="i2c2" description="I2C device to use"/>
<section name="IMU" prefix="IMU_">
<define name="MAG_X_NEUTRAL" value="2358"/>
<define name="MAG_Y_NEUTRAL" value="2362"/>
<define name="MAG_Z_NEUTRAL" value="2119"/>
<define name="MAG_X_SENS" value="3.4936416" integer="16"/>
<define name="MAG_Y_SENS" value="3.607713" integer="16"/>
<define name="MAG_Z_SENS" value="4.90788848" integer="16"/>
<autoload name="imu_common"/>
<autoload name="imu_nps"/>
<file name="imu_aspirin_i2c.h" dir="subsystems/imu"/>
<init fun="imu_aspirin_i2c_init()"/>
<periodic fun="imu_aspirin_i2c_periodic()"/>
<event fun="imu_aspirin_i2c_event()"/>
<makefile target="!sim|nps|fbw">
<configure name="ASPIRIN_I2C_DEV" default="i2c2" case="lower|upper"/>
<define name="ASPIRIN_I2C_DEV" value="$(ASPIRIN_I2C_DEV_LOWER)"/>
<define name="USE_$(ASPIRIN_I2C_DEV_UPPER)"/>
<define name="IMU_TYPE_H" value="imu/imu_aspirin_i2c.h" type="string"/>
<file name="adxl345_i2c.c" dir="peripherals"/>
<file name="itg3200.c" dir="peripherals"/>
<file name="hmc58xx.c" dir="peripherals"/>
<file name="imu_aspirin_i2c.c" dir="subsystems/imu"/>