File syn_dshot_telemetry.c

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Zero-Heap Bidirectional DShot (BDShot) Telemetry Decoder Implementation.

• #include "syntropic/output/syn_dshot_telemetry.h"
• #include "syntropic/output/syn_dshot.h"

Public Static Attributes

Type	Name
const int8_t	gcr_to_nibble = /* multi line expression */

Public Functions

Type	Name
SYN_Status	syn_dshot_decode_gcr_20bit (uint32_t gcr_20bit, uint16_t * payload_out) Decode 20-bit raw GCR bitstream into 16-bit BDShot telemetry payload.
SYN_Status	syn_dshot_parse_telemetry (uint32_t gcr_20bit, uint8_t pole_pairs, SYN_DShot_Telemetry * telemetry) Decode complete 20-bit BDShot GCR packet into telemetry measurements.

Public Static Attributes Documentation

variable gcr_to_nibble

const int8_t gcr_to_nibble[32];

GCR (Group Code Recording) 5-bit to 4-bit nibble lookup table (-1 = invalid)

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Public Functions Documentation

function syn_dshot_decode_gcr_20bit

Decode 20-bit raw GCR bitstream into 16-bit BDShot telemetry payload.

SYN_Status syn_dshot_decode_gcr_20bit (
    uint32_t gcr_20bit,
    uint16_t * payload_out
) 

Parameters:

• gcr_20bit 20-bit raw GCR frame.
• payload_out Pointer to receive 16-bit decoded payload ([15:4] period, [3:0] crc).

Returns:

SYN_OK on valid GCR decode, SYN_ERROR if invalid GCR symbol found.

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function syn_dshot_parse_telemetry

Decode complete 20-bit BDShot GCR packet into telemetry measurements.

SYN_Status syn_dshot_parse_telemetry (
    uint32_t gcr_20bit,
    uint8_t pole_pairs,
    SYN_DShot_Telemetry * telemetry
) 

Parameters:

• gcr_20bit 20-bit raw GCR frame.
• pole_pairs Motor pole pairs (e.g., 14 poles = 7 pole pairs). Default 7 if 0.
• telemetry Pointer to output telemetry structure.

Returns:

SYN_OK on valid decode and CRC, SYN_ERROR on bad GCR/CRC.

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