A feature-incomplete SAE J2716 (SENT / Single Edge Nibble Transmission) decoder for Sigrok, with support for SPC (Short PWM Code).
Created as part of my vehicle-hacking project since I can't seem to find good, open-source decoders that could decode SENT signals that also includes SPC pulses.
Note that this project is considered a work-in-progress, and the code is not tested against different types of SENT captures just yet, so it may or may not work for you - use with caution!
Pull requests are welcome for everything from bugfixes to additional features :)
The decoder implement several CRC calculation methods:
- J2716 Recommended: recommended method (with zero padding) per SAE J2716 (APR2016) - CRC over data nibbles only
- J2716 Legacy: legacy method (no zero padding) per SAE J2716 (APR2016) - CRC over data nibbles only
- Infineon: method per Infineon TLE4998 user manual - CRC over data and status nibbles
- Actually decode SPC pulses, right now the decoder just skips over it
- SENT pause pulse handling (don't have the traces/devices that does this to test yet)
- A more robust method of separating SENT frames rather than just time interval...
- Comprehensive testing of decoder against different SENT traces (especially those without SPC)
On Ubuntu Linux: place (or symlink to) the entire decoder directory in /usr/share/libsigrokdecode/decoders/.
MIT - see license.md for more details.