File syn_crc.c

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CRC calculation implementations.

• #include "syn_crc.h"

Public Static Attributes

Type	Name
const uint16_t	crc16_ccitt_table = /* multi line expression */ CRC-16 CCITT lookup table.
const uint16_t	crc16_modbus_table = /* multi line expression */ CRC-16 Modbus lookup table.
const uint32_t	crc32_table CRC-32 lookup table.
const uint8_t	crc8_table = /* multi line expression */ CRC-8 lookup table.

Public Functions

Type	Name
uint16_t	syn_crc16_ccitt_update (uint16_t crc, const void * data, size_t len) Update CRC-16 CCITT with a block of data.
uint16_t	syn_crc16_modbus_update (uint16_t crc, const void * data, size_t len) Update CRC-16 Modbus with a block of data.
uint32_t	syn_crc32_update (uint32_t crc, const void * data, size_t len) Update CRC-32 with a block of data.
uint8_t	syn_crc8_update (uint8_t crc, const void * data, size_t len) Update CRC-8 with a block of data.

Public Static Attributes Documentation

variable crc16_ccitt_table

CRC-16 CCITT lookup table.

const uint16_t crc16_ccitt_table[256];

---

variable crc16_modbus_table

CRC-16 Modbus lookup table.

const uint16_t crc16_modbus_table[256];

---

variable crc32_table

CRC-32 lookup table.

const uint32_t crc32_table[256];

---

variable crc8_table

CRC-8 lookup table.

const uint8_t crc8_table[256];

---

Public Functions Documentation

function syn_crc16_ccitt_update

Update CRC-16 CCITT with a block of data.

uint16_t syn_crc16_ccitt_update (
    uint16_t crc,
    const void * data,
    size_t len
) 

Parameters:

• crc Running CRC value (start with SYN_CRC16_CCITT_INIT).
• data Data buffer.
• len Length in bytes.

Returns:

Updated CRC-16.

---

function syn_crc16_modbus_update

Update CRC-16 Modbus with a block of data.

uint16_t syn_crc16_modbus_update (
    uint16_t crc,
    const void * data,
    size_t len
) 

Parameters:

• crc Running CRC value (start with SYN_CRC16_MODBUS_INIT).
• data Data buffer.
• len Length in bytes.

Returns:

Updated CRC-16.

---

function syn_crc32_update

Update CRC-32 with a block of data.

uint32_t syn_crc32_update (
    uint32_t crc,
    const void * data,
    size_t len
) 

Parameters:

• crc Running CRC value (start with SYN_CRC32_INIT).
• data Data buffer.
• len Length in bytes.

Returns:

Updated CRC-32 (call syn_crc32_final to finalize).

---

function syn_crc8_update

Update CRC-8 with a block of data.

uint8_t syn_crc8_update (
    uint8_t crc,
    const void * data,
    size_t len
) 

Parameters:

• crc Running CRC value (start with SYN_CRC8_INIT).
• data Data buffer.
• len Length in bytes.

Returns:

Updated CRC-8.

---

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