Servo tester

Has a setting to change the input to the servo in millisecond units.

You have to give the servo you want to test the name SERVO_TEST, and don't use it in the command laws.

Additionally, you can make the servo do a series of step maneuvers, with increasing amplitude. Tip: Open up the servo and measure the voltage on the potmeter with a high speed recorder device (like a saleae Logic analyzer with analog inputs). This will let you model the response of the servo.

Example for airframe file

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

 <module name="servo_tester">
   <define name="TIME_PER_DEFLECTION" value="0.8" />
 </module>

Module configuration options

Define Options

name: TIME_PER_DEFLECTION value: 0.8
Description: Time between servo steps for the 'servo_run' feature

Module functions

Init Functions

These initialization functions are called once on startup.

servo_tester_init()

Periodic Functions

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

servo_tester_periodic()
- Frequency in Hz: 512
- 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

servo_tester.h

Source Files

modules/servo_tester/servo_tester.c

Raw servo_tester.xml file:

<!DOCTYPE module SYSTEM "module.dtd">
<module name="servo_tester" dir="servo_tester">
  <doc>
    <description>
      Servo tester
      Has a setting to change the input to the servo in millisecond units.
      You have to give the servo you want to test the name SERVO_TEST, and don't use
      it in the command laws.
      Additionally, you can make the servo do a series of step maneuvers, with increasing
      amplitude. Tip: Open up the servo and measure the voltage on the potmeter with
      a high speed recorder device (like a saleae Logic analyzer with analog inputs). This 
      will let you model the response of the servo.
    </description>
    <define name="TIME_PER_DEFLECTION" value="0.8" description="Time between servo steps for the 'servo_run' feature"/>
  </doc>
  <settings>
    <dl_settings NAME="Servo test">
      <dl_settings NAME="Servo tester">
        <dl_setting var="servo_test_val" min="1000" step="1" max="2000" module="modules/servo_tester/servo_tester" shortname="servo_input"/>
        <dl_setting var="do_servo_run" min="0" step="1" max="1" module="modules/servo_tester/servo_tester" values="Off|On" shortname="servo_run"/>
      </dl_settings>
    </dl_settings>
  </settings>
  <header>
    <file name="servo_tester.h"/>
  </header>
  <init fun="servo_tester_init()"/>
  <periodic fun="servo_tester_periodic()" freq="512"/>
  <makefile>
    <file name="servo_tester.c"/>
  </makefile>
</module>