ppm.c File Reference

Architecture independent functions for PPM radio control. More...

#include "subsystems/radio_control.h"
#include "subsystems/radio_control/ppm.h"

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Go to the source code of this file.

Macros
#define	RssiValid()   TRUE
	RssiValid test macro. More...

Functions
void	radio_control_impl_init (void)
void	radio_control_impl_event (void(*_received_frame_handler)(void))
	RC event function with handler callback. More...
void	ppm_decode_frame (uint32_t ppm_time)
	Decode a PPM frame. More...

Variables
uint16_t	ppm_pulses [RADIO_CTL_NB]
volatile bool_t	ppm_frame_available
static uint8_t	ppm_cur_pulse
static uint32_t	ppm_last_pulse_time
static bool_t	ppm_data_valid

Detailed Description

Architecture independent functions for PPM radio control.

Definition in file ppm.c.

Macro Definition Documentation

#define RssiValid

(

)

TRUE

RssiValid test macro.

This macro has to be defined to test the validity of ppm frame from an other source (ex: GPIO). By default, always true.

Definition at line 48 of file ppm.c.

Referenced by ppm_decode_frame().

Function Documentation

void ppm_decode_frame

(

uint32_t

ppm_time

)

Decode a PPM frame.

A valid ppm frame:

• synchro blank
• correct number of channels
• synchro blank

Definition at line 103 of file ppm.c.

References FALSE, ppm_cur_pulse, ppm_data_valid, ppm_frame_available, ppm_last_pulse_time, ppm_pulses, RC_PPM_TICKS_OF_USEC, RssiValid, and TRUE.

void radio_control_impl_event

(

void(*)(void)

_received_frame_handler

)

RC event function with handler callback.

PPM frames are normalized using the IIR filter.

Definition at line 80 of file ppm.c.

void radio_control_impl_init

(

void

)

Definition at line 66 of file ppm.c.

References DefaultPeriodic, FALSE, ppm_arch_init(), ppm_cur_pulse, ppm_data_valid, ppm_frame_available, ppm_last_pulse_time, register_periodic_telemetry(), and send_ppm().

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Variable Documentation

uint8_t ppm_cur_pulse

static

Definition at line 37 of file ppm.c.

Referenced by ppm_decode_frame(), and radio_control_impl_init().

bool_t ppm_data_valid

static

Definition at line 39 of file ppm.c.

Referenced by ppm_decode_frame(), and radio_control_impl_init().

volatile bool_t ppm_frame_available

Definition at line 32 of file ppm.c.

Referenced by ppm_decode_frame(), radio_control_impl_event(), radio_control_impl_init(), and send_ppm().

uint32_t ppm_last_pulse_time

static

Definition at line 38 of file ppm.c.

Referenced by ppm_decode_frame(), and radio_control_impl_init().

uint16_t ppm_pulses[RADIO_CTL_NB]

Definition at line 31 of file ppm.c.

Referenced by ppm_decode_frame(), radio_control_impl_event(), and update_rc_channel().