File syn_ppm.c

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Zero-Heap PPM Multi-Channel RC Receiver Decoder Implementation.

• #include "syntropic/input/syn_ppm.h"
• #include <string.h>

Public Functions

Type	Name
uint16_t	syn_ppm_get_channel (const SYN_PPM_Decoder * ppm, uint8_t channel_idx) Get pulse width (us) for specified 0-indexed channel.
SYN_Status	syn_ppm_init (SYN_PPM_Decoder * ppm) Initialize PPM decoder instance.
SYN_Status	syn_ppm_process_pulse (SYN_PPM_Decoder * ppm, uint16_t pulse_us) Process high-resolution measured pulse width (us) from Timer Input Capture interrupt.

Public Functions Documentation

function syn_ppm_get_channel

Get pulse width (us) for specified 0-indexed channel.

uint16_t syn_ppm_get_channel (
    const SYN_PPM_Decoder * ppm,
    uint8_t channel_idx
) 

Parameters:

• ppm Pointer to decoder struct.
• channel_idx 0-indexed channel index (0..11).

Returns:

Pulse width in microseconds (clamped 1000..2000 us, or 1500 us default if unreceived).

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function syn_ppm_init

Initialize PPM decoder instance.

SYN_Status syn_ppm_init (
    SYN_PPM_Decoder * ppm
) 

Parameters:

• ppm Pointer to decoder struct.

Returns:

SYN_OK on success.

---

function syn_ppm_process_pulse

Process high-resolution measured pulse width (us) from Timer Input Capture interrupt.

SYN_Status syn_ppm_process_pulse (
    SYN_PPM_Decoder * ppm,
    uint16_t pulse_us
) 

Parameters:

• ppm Pointer to decoder struct.
• pulse_us Measured pulse width in microseconds (us).

Returns:

SYN_OK when a complete multi-channel PPM frame is finished, SYN_BUSY during channel reception.

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The documentation for this class was generated from the following file src/syntropic/input/syn_ppm.c