uint16_t custom_crc16(const uint8_t* data, uint32_t len, uint16_t init) uint16_t crc = init; for (uint32_t i = 0; i < len; i++) crc ^= (data[i] << 8); for (int bit = 0; bit < 8; bit++) if (crc & 0x8000) crc = (crc << 1) ^ 0x8005; else crc = crc << 1;
Use algorithmID to route to different checksum methods inside the same DLL:
// Byte swap for little-endian ECU return (crc >> 8)
Developing a custom checksum DLL for WinOLS extends the tool's capability to any ECU, regardless of manufacturer or checksum algorithm. By adhering to the documented API, using correct calling conventions, and rigorous testing, a tuner can safely implement support for previously incompatible ECUs. The example CRC-16 implementation provides a foundation that can be adapted to any 8/16/32-bit checksum, including XOR, sum, CRC, or custom proprietary algorithms.
uint16_t custom_crc16(const uint8_t* data, uint32_t len, uint16_t init) uint16_t crc = init; for (uint32_t i = 0; i < len; i++) crc ^= (data[i] << 8); for (int bit = 0; bit < 8; bit++) if (crc & 0x8000) crc = (crc << 1) ^ 0x8005; else crc = crc << 1;
Use algorithmID to route to different checksum methods inside the same DLL: Winols Checksum Dll
// Byte swap for little-endian ECU return (crc >> 8) uint16_t custom_crc16(const uint8_t* data
Developing a custom checksum DLL for WinOLS extends the tool's capability to any ECU, regardless of manufacturer or checksum algorithm. By adhering to the documented API, using correct calling conventions, and rigorous testing, a tuner can safely implement support for previously incompatible ECUs. The example CRC-16 implementation provides a foundation that can be adapted to any 8/16/32-bit checksum, including XOR, sum, CRC, or custom proprietary algorithms. uint16_t init) uint16_t crc = init