Pressure Board Navarro.

by Matthieu Navarro (2010)

combine differential and absolute pressure sensor (ETS raw sensors) controlled by a dspic return scaled values over I2C

Example for airframe file

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

 <module name="pbn">
   <define name="PBN_AIRSPEED_SCALE" value="(1./0.54)" />
   <define name="PBN_ALTITUDE_SCALE" value="0.32" />
   <define name="PBN_PRESSURE_OFFSET" value="101325.0" />
   <define name="USE_AIRSPEED_PBN" value="TRUE|FALSE" />
 </module>

Module configuration options

Define Options

name: PBN_AIRSPEED_SCALE value: (1./0.54)
Description: quadratic scale factor to convert differential pressure to airspeed
name: PBN_ALTITUDE_SCALE value: 0.32
Description: linear scale factor for altitude
name: PBN_PRESSURE_OFFSET value: 101325.0
Description: pressure offset
name: USE_AIRSPEED_PBN value: TRUE|FALSE
Description: set airspeed in state interface

Module functions

Init Functions

These initialization functions are called once on startup.

pbn_init()

Event Functions

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

PbnEvent()

Periodic Functions

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

pbn_periodic()
- Frequency in Hz: 10
- 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

pressure_board_navarro.h

Source Files

modules/sensors/pressure_board_navarro.c

Raw pbn.xml file:

<!DOCTYPE module SYSTEM "module.dtd">
<module name="pbn" dir="sensors">
  <doc>
    <description>
      Pressure Board Navarro.
      by Matthieu Navarro (2010)
      combine differential and absolute pressure sensor (ETS raw sensors)
      controlled by a dspic
      return scaled values over I2C
    </description>
    <define name="PBN_AIRSPEED_SCALE" value="(1./0.54)" description="quadratic scale factor to convert differential pressure to airspeed"/>
    <define name="PBN_ALTITUDE_SCALE" value="0.32" description="linear scale factor for altitude"/>
    <define name="PBN_PRESSURE_OFFSET" value="101325.0" description="pressure offset"/>
    <define name="USE_AIRSPEED_PBN" value="TRUE|FALSE" description="set airspeed in state interface"/>
  </doc>
  <settings>
    <dl_settings>
      <dl_settings NAME="pbn">
        <dl_setting MAX="30" MIN="0" STEP="1" module="sensors/pressure_board_navarro" VAR="pbn.airspeed_filter"/>
      </dl_settings>
    </dl_settings>
  </settings>
  <header>
    <file name="pressure_board_navarro.h"/>
  </header>
  <init fun="pbn_init()"/>
  <periodic fun="pbn_periodic()" freq="10"/>
  <event fun="PbnEvent()"/>
  <makefile>
    <file name="pressure_board_navarro.c"/>
  </makefile>
</module>