33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
#ifndef __CRC16_H__
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#define __CRC16_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include "slave_protocol.h"
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#define CRC16_HASH_LENGTH 2 // bytes
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typedef struct Crc16Data {
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uint16_t currentCrc;
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} crc16_data_t;
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//! @brief Initializes the parameters of the crc function, must be called first.
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//! @param crc16Config Instantiation of the data structure of type crc16_data_t.
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void crc16_init(crc16_data_t *crc16Config);
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//! @brief A "running" crc calculator that updates the crc value after each call.
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//! @param crc16Config Instantiation of the data structure of type crc16_data_t.
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//! @param src Pointer to the source buffer of data.
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//! @param lengthInBytes The length, given in bytes (not words or long-words).
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void crc16_update(crc16_data_t *crc16Config, const uint8_t *src, uint32_t lengthInBytes);
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//! @brief Calculates the final crc value, padding with zeros if necessary, must be called last.
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//! @param crc16Config Instantiation of the data structure of type crc16_data_t.
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//! @param hash Pointer to the value returned for the final calculated crc value.
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void crc16_finalize(crc16_data_t *crc16Config, uint16_t *hash);
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void CRC16_UpdateMessageChecksum(i2c_message_t *message);
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bool CRC16_IsMessageValid(i2c_message_t *message);
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#endif
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