Airspeed sensor (ADC)

Module XML file: airspeed_adc.xml

Using the internal ADC.

Example for airframe file

This example contains all possible configuration options, not all of them are mandatory!

<modules>
  <load name="airspeed_adc.xml">
    <define name="AIRSPEED_ADC_SCALE" value="scale factor" />
    <define name="AIRSPEED_ADC_QUADRATIC_SCALE" value="quadratic scale factor" />
    <define name="AIRSPEED_ADC_BIAS" value="sensor bias" />
    <define name="USE_AIRSPEED_ADC" value="TRUE|FALSE" />
    <configure name="ADC_AIRSPEED" value="ADCX" />
  </load>
</modules>

Module configuration options

Configure Options

• name: ADC_AIRSPEED value: ADCX
  Description: ADC on which sensor is connected

Define Options

• name: AIRSPEED_ADC_SCALE value: scale factor
  Description: linear scale factor (used if AIRSPEED_QUADRATIC_SCALE is not defined
• name: AIRSPEED_ADC_QUADRATIC_SCALE value: quadratic scale factor
  Description: it is recommended to use quadratic scale
• name: AIRSPEED_ADC_BIAS value: sensor bias
  Description: offset on ADC
• name: USE_AIRSPEED_ADC value: TRUE|FALSE
  Description: set airspeed in state interface (default:TRUE)

Module functions

Init Functions

These initialization functions are called once on startup.

• airspeed_adc_init()

Periodic Functions

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

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

Files

Header Files

The following headers are automatically included in modules.h

• airspeed_adc.h

Source Files

• modules/sensors/airspeed_adc.c

Raw airspeed_adc.xml file:

<!DOCTYPE module SYSTEM "module.dtd">

<module name="airspeed_adc" dir="sensors">
  <doc>
    <description>Airspeed sensor (ADC).
    Using the internal ADC.
    </description>
    <configure name="ADC_AIRSPEED" value="ADCX" description="ADC on which sensor is connected"/>
    <define name="AIRSPEED_ADC_SCALE" value="scale factor" description="linear scale factor (used if AIRSPEED_QUADRATIC_SCALE is not defined"/>
    <define name="AIRSPEED_ADC_QUADRATIC_SCALE" value="quadratic scale factor" description="it is recommended to use quadratic scale"/>
    <define name="AIRSPEED_ADC_BIAS" value="sensor bias" description="offset on ADC"/>
    <define name="USE_AIRSPEED_ADC" value="TRUE|FALSE" description="set airspeed in state interface (default:TRUE)"/>
  </doc>
  <settings>
    <dl_settings>
      <dl_settings name="airsp">
        <dl_setting max="4095" min="0" step="1" module="sensors/airspeed_adc" var="airspeed_adc.offset" shortname="air_bias"/>
        <dl_setting max="3" min="0" step="0.001" module="sensors/airspeed_adc" var="airspeed_adc.scale" shortname="air_scale"/>
      </dl_settings>
    </dl_settings>
  </settings>
  <header>
    <file name="airspeed_adc.h"/>
  </header>
  <init fun="airspeed_adc_init()"/>
  <periodic fun="airspeed_adc_update()" />

  <makefile>
    <file name="airspeed_adc.c"/>
  </makefile>
  <makefile target="ap">
    <define name="ADC_CHANNEL_AIRSPEED" value="$(ADC_AIRSPEED)"/>
    <define name="USE_$(ADC_AIRSPEED)"/>
  </makefile>

</module>