Digi Xtend RSSI PWM Module

Module XML file: xtend_rssi.xml

For LPC21xx on the TWOG:

• INPUT CAPTURE CAP0.3 on P0.29 (TWOG ADC5, 5V to 3.3V voltage divider)
• INPUT CAPTURE CAP0.0 on P0.30 (TWOG ADC4, no voltage divider)

Currently only available on LPC21xx arch. You must also load the module pwm_meas.xml

Example for airframe file

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

<modules>
  <load name="xtend_rssi.xml">
    <configure name="XTEND_RSSI_PWM_INPUT_CHANNEL" value="input" />
  </load>
</modules>

Module configuration options

Configure Options

• name: XTEND_RSSI_PWM_INPUT_CHANNEL value: input
  Description: select on which arch dep input the pwm line is connected

Module functions

Periodic Functions

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

• xtend_rssi_periodic()
  • Frequency in Hz: 0.5
  • 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

• xtend_rssi.h

Source Files

• modules/datalink/xtend_rssi.c

Raw xtend_rssi.xml file:

<!DOCTYPE module SYSTEM "module.dtd">

<module name="xtend_rssi" dir="datalink">
  <doc>
    <description>
      Digi Xtend RSSI PWM Module.
      For LPC21xx on the TWOG:
      - INPUT CAPTURE CAP0.3 on P0.29 (TWOG ADC5, 5V to 3.3V voltage divider)
      - INPUT CAPTURE CAP0.0 on P0.30 (TWOG ADC4, no voltage divider)

      Currently only available on LPC21xx arch.
      You must also load the module pwm_meas.xml
    </description>
    <configure name="XTEND_RSSI_PWM_INPUT_CHANNEL" value="input" description="select on which arch dep input the pwm line is connected"/>
  </doc>
  <depends>pwm_meas</depends>
  <header>
    <file name="xtend_rssi.h"/>
  </header>
  <periodic fun="xtend_rssi_periodic()" freq="0.5"/>
  <makefile target="ap">
    <file name="xtend_rssi.c"/>
    <define name="XTEND_RSSI_PWM_INPUT_CHANNEL" value="$(XTEND_RSSI_PWM_INPUT_CHANNEL)"/> <!-- configure the pwm input to be used in airframe file -->
    <define name="USE_PWM_INPUT$(XTEND_RSSI_PWM_INPUT_CHANNEL)" value="PWM_PULSE_TYPE_ACTIVE_HIGH"/> <!-- rssi signal is active high -->
  </makefile>
</module>