ppm.h File Reference

#include "std.h"
#include "generated/airframe.h"
#include "modules/radio_control/ppm_arch.h"
#include "generated/radio.h"

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Macros
#define	PPM_PULSE_TYPE_POSITIVE   0
	Generated code holding the description of a given transmitter. More...
#define	PPM_PULSE_TYPE_NEGATIVE   1

Functions
void	ppm_arch_init (void)
	Architecture dependant code. More...
void	ppm_init (void)
	RC init function. More...
void	ppm_event (void)
	RC event function. 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

Macro Definition Documentation

PPM_PULSE_TYPE_NEGATIVE

#define PPM_PULSE_TYPE_NEGATIVE   1

Definition at line 47 of file ppm.h.

PPM_PULSE_TYPE_POSITIVE

#define PPM_PULSE_TYPE_POSITIVE   0

Generated code holding the description of a given transmitter.

ppm pulse type : futaba is falling edge clocked whereas JR is rising edge

Definition at line 46 of file ppm.h.

Function Documentation

ppm_arch_init()

void ppm_arch_init

(

void

)

Architecture dependant code.

Definition at line 90 of file ppm_arch.c.

References FALSE, gpio_setup_pin_af(), ONE_MHZ_CLK, PPM_CC_IE, PPM_CHANNEL, ppm_cur_pulse, PPM_GPIO_AF, PPM_GPIO_PIN, PPM_GPIO_PORT, ppm_icucfg, PPM_IRQ, PPM_IRQ2, PPM_IRQ_PRIO, ppm_last_pulse_time, PPM_TIMER, PPM_TIMER_INPUT, RADIO_CONTROL_NB_CHANNEL, RC_PPM_TICKS_PER_USEC, timer_get_frequency(), and timer_rollover_cnt.

Referenced by ppm_init().

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ppm_decode_frame()

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 105 of file ppm.c.

References ppm_decode_frame_width(), and ppm_last_pulse_time.

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ppm_decode_frame_width()

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 120 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().

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ppm_event()

void ppm_event

(

void

)

RC event function.

PPM frames are normalized using the IIR filter.

Definition at line 86 of file ppm.c.

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

ppm_init()

void ppm_init

(

void

)

RC init function.

Definition at line 71 of file ppm.c.

References DefaultPeriodic, RadioControl::nb_channel, ppm_arch_init(), ppm_cur_pulse, ppm_data_valid, ppm_frame_available, ppm_last_pulse_time, radio_control, register_periodic_telemetry(), and send_ppm().

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Variable Documentation

ppm_frame_available

volatile bool ppm_frame_available

extern

Definition at line 37 of file ppm.c.

Referenced by ppm_decode_frame_width(), ppm_event(), ppm_init(), and radio_control_feed().

ppm_pulses

uint16_t ppm_pulses[RADIO_CTL_NB]

extern

Definition at line 36 of file ppm.c.

Referenced by ppm_decode_frame_width(), ppm_event(), radio_control_feed(), and send_ppm().