trigger_ext module

External trigger

(lpc only)

Example for airframe file

Add to your firmware section:

<module name="trigger_ext"/>

Module functions

Init Functions

These initialization functions are called once on startup.

• trigger_ext_init()

Periodic Functions

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

• trigger_ext_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

• trig_ext_hw.h
• trigger_ext.h

Source Files

• modules/sensors/trigger_ext.c
• arch dependent: modules/sensors/trig_ext_hw.c

Raw trigger_ext.xml file:

<!DOCTYPE module SYSTEM "module.dtd">

<module name="trigger_ext" dir="sensors">
  <doc>
    <description>
      External trigger
      (lpc only)
    </description>
  </doc>
  <header>
    <file name="trig_ext_hw.h"/>
    <file name="trigger_ext.h"/>
  </header>
  <init fun="trigger_ext_init()"/>
  <periodic fun="trigger_ext_periodic()" freq="10"/>
  <makefile>
    <file_arch name="trig_ext_hw.c"/>
    <file name="trigger_ext.c"/>
    <define name="TRIGGER_EXT"/>
    <define name="TRIG_EXT_PULSE_TYPE" value="TRIG_EXT_EDGE_FALLING"/>
    <define name="TURBINE_ID" value="42"/>
  </makefile>
</module>