<!DOCTYPE module SYSTEM "module.dtd">

<module name="pwm_meas" dir="core">
  <doc>
    <description>
      PWM measurement.

      PWM input measurement mcu periph access and init wrapper for other modules.

      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)

      For STM32:
      - each board (or airframe file) has to define the PWM input pin and parameters
      - example can be found in sw/airborne/boards/apogee_1.0.h board file
    </description>
    <define name="USE_PWM_INPUT1" value="PWM_PULSE_TYPE_ACTIVE_LOW|PWM_PULSE_TYPE_ACTIVE_HIGH" description="Activate PWM input 1 and select polarity"/>
    <define name="USE_PWM_INPUT2" value="PWM_PULSE_TYPE_ACTIVE_LOW|PWM_PULSE_TYPE_ACTIVE_HIGH" description="Activate PWM input 2 and select polarity"/>
  </doc>
  <header>
    <file name="pwm_meas.h"/>
  </header>
  <init fun="pwm_meas_init()"/>
  <makefile target="ap">
    <file name="pwm_meas.c"/>
    <file name="pwm_input.c" dir="mcu_periph"/>
    <file_arch name="pwm_input_arch.c" dir="mcu_periph"/>
    <define name="USE_PWM_INPUT"/> <!-- needed to enable the pwm_input interrupts in mcu_periph/sys_time_arch.c -->
  </makefile>
</module>
