You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.0 KiB
39 lines
1.0 KiB
#ifndef SBMP_CHECKSUM_H
|
|
#define SBMP_CHECKSUM_H
|
|
|
|
/**
|
|
* Checksum functions for the SBMP framing layer.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "sbmp_config.h"
|
|
|
|
|
|
/** Checksum types */
|
|
typedef enum {
|
|
SBMP_CKSUM_NONE = 0, /*!< No checksum */
|
|
SBMP_CKSUM_CRC32 = 32, /*!< ISO CRC-32 */
|
|
SBMP_CKSUM_XOR = 1, /*!< Simple XOR check, good for small micros (Arduino) */
|
|
|
|
} SBMP_CksumType;
|
|
|
|
|
|
/** Get nr of bytes in a checksum */
|
|
uint8_t chksum_length(SBMP_CksumType cksum_type);
|
|
|
|
/** Start calculating a checksum. Updates scratch. */
|
|
void cksum_begin(SBMP_CksumType type, uint32_t *scratch);
|
|
|
|
/** Update the checksum calculation with an incoming byte. Updates scratch. */
|
|
void cksum_update(SBMP_CksumType type, uint32_t *scratch, uint8_t byte);
|
|
|
|
/** Stop the checksum calculation, get the result */
|
|
void cksum_end(SBMP_CksumType type, uint32_t *scratch);
|
|
|
|
/** Check if the calculated checksum matches the received one */
|
|
bool cksum_verify(SBMP_CksumType type, uint32_t *scratch, uint32_t received_cksum);
|
|
|
|
|
|
#endif /* SBMP_CHECKSUM_H */
|
|
|