ppm.c File Reference

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

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

Include dependency graph for ppm.c:

Go to the source code of this file.

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

Functions
static void	send_ppm (struct transport_tx *trans, struct link_device *dev)
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 from global timer value. More...
void	ppm_decode_frame_width (uint32_t ppm_width)
	Decode a PPM frame from last width. More...

Variables
uint16_t	ppm_pulses [RADIO_CTL_NB]
volatile bool	ppm_frame_available
static uint8_t	ppm_cur_pulse
static uint32_t	ppm_last_pulse_time
static bool	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_width().

Function Documentation

void ppm_decode_frame

(

uint32_t

ppm_time

)

Decode a PPM frame from global timer value.

A valid ppm frame:

• synchro blank
• correct number of channels
• synchro blank

Definition at line 99 of file ppm.c.

References ppm_decode_frame_width(), and ppm_last_pulse_time.

Here is the call graph for this function:

void ppm_decode_frame_width

(

uint32_t

ppm_width

)

Decode a PPM frame from last width.

A valid ppm frame:

• synchro blank
• correct number of channels
• synchro blank

Definition at line 114 of file ppm.c.

References ppm_cur_pulse, ppm_data_valid, ppm_frame_available, ppm_pulses, RC_PPM_TICKS_OF_USEC, and RssiValid.

Referenced by icuperiodcb(), and ppm_decode_frame().

Here is the caller graph for this function:

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.

References RadioControl::frame_cpt, ppm_frame_available, ppm_pulses, radio_control, RadioControl::radio_ok_cpt, RC_OK, RadioControl::status, and RadioControl::time_since_last_frame.

void radio_control_impl_init

(

void

)

Definition at line 66 of file ppm.c.

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

Here is the call graph for this function:

static void send_ppm ( struct transport_tx *  trans, struct link_device *  dev  )

static

Definition at line 55 of file ppm.c.

References RadioControl::frame_rate, ppm_pulses, radio_control, and USEC_OF_RC_PPM_TICKS.

Referenced by radio_control_impl_init().

Here is the caller graph for this function:

Variable Documentation

uint8_t ppm_cur_pulse

static

Definition at line 37 of file ppm.c.

Referenced by ppm_decode_frame_width(), and radio_control_impl_init().

bool ppm_data_valid

static

Definition at line 39 of file ppm.c.

Referenced by ppm_decode_frame_width(), and radio_control_impl_init().

volatile bool ppm_frame_available

Definition at line 32 of file ppm.c.

Referenced by ppm_decode_frame_width(), 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_width(), radio_control_impl_event(), send_ppm(), and update_rc_channel().