ppm.h File Reference

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

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Macros
#define	RADIO_CONTROL_NB_CHANNEL   RADIO_CTL_NB
	Generated code holding the description of a given transmitter. More...
#define	PPM_PULSE_TYPE_POSITIVE   0
	ppm pulse type : futaba is falling edge clocked whereas JR is rising edge More...
#define	PPM_PULSE_TYPE_NEGATIVE   1
#define	RadioControlEvent(_received_frame_handler)   radio_control_impl_event(_received_frame_handler)

Functions
void	ppm_arch_init (void)
	Architecture dependant code. More...
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

Macro Definition Documentation

#define PPM_PULSE_TYPE_NEGATIVE   1

Definition at line 58 of file ppm.h.

#define PPM_PULSE_TYPE_POSITIVE   0

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

Definition at line 57 of file ppm.h.

#define RADIO_CONTROL_NB_CHANNEL   RADIO_CTL_NB

Generated code holding the description of a given transmitter.

Default number of channels to actually use.

Definition at line 47 of file ppm.h.

#define RadioControlEvent

(

_received_frame_handler

)

radio_control_impl_event(_received_frame_handler)

Definition at line 69 of file ppm.h.

Function Documentation

void ppm_arch_init

(

void

)

Architecture dependant code.

Definition at line 89 of file ppm_arch.c.

References FALSE, gpio_setup_pin_af(), ONE_MHZ_CLK, PPM_CC_IE, PPM_CCR_CRF, PPM_CCR_CRI, PPM_CCR_CRR, 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_PINSEL, PPM_PINSEL_BIT, PPM_PINSEL_VAL, PPM_TIMER, PPM_TIMER_INPUT, RADIO_CONTROL_NB_CHANNEL, RC_PPM_TICKS_PER_USEC, T0CCR, timer_get_frequency(), and timer_rollover_cnt.

Referenced by radio_control_impl_init().

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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.

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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().

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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 66 of file hott.c.

Variable Documentation

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().

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().