diff options
Diffstat (limited to 'mavlink/share/pyshared/pymavlink/generator/C/include_v1.0/checksum.h')
-rw-r--r-- | mavlink/share/pyshared/pymavlink/generator/C/include_v1.0/checksum.h | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/mavlink/share/pyshared/pymavlink/generator/C/include_v1.0/checksum.h b/mavlink/share/pyshared/pymavlink/generator/C/include_v1.0/checksum.h deleted file mode 100644 index 4f4cce02f..000000000 --- a/mavlink/share/pyshared/pymavlink/generator/C/include_v1.0/checksum.h +++ /dev/null @@ -1,89 +0,0 @@ -#ifdef __cplusplus -extern "C" { -#endif - -#ifndef _CHECKSUM_H_ -#define _CHECKSUM_H_ - - -/** - * - * CALCULATE THE CHECKSUM - * - */ - -#define X25_INIT_CRC 0xffff -#define X25_VALIDATE_CRC 0xf0b8 - -/** - * @brief Accumulate the X.25 CRC by adding one char at a time. - * - * The checksum function adds the hash of one char at a time to the - * 16 bit checksum (uint16_t). - * - * @param data new char to hash - * @param crcAccum the already accumulated checksum - **/ -static inline void crc_accumulate(uint8_t data, uint16_t *crcAccum) -{ - /*Accumulate one byte of data into the CRC*/ - uint8_t tmp; - - tmp = data ^ (uint8_t)(*crcAccum &0xff); - tmp ^= (tmp<<4); - *crcAccum = (*crcAccum>>8) ^ (tmp<<8) ^ (tmp <<3) ^ (tmp>>4); -} - -/** - * @brief Initiliaze the buffer for the X.25 CRC - * - * @param crcAccum the 16 bit X.25 CRC - */ -static inline void crc_init(uint16_t* crcAccum) -{ - *crcAccum = X25_INIT_CRC; -} - - -/** - * @brief Calculates the X.25 checksum on a byte buffer - * - * @param pBuffer buffer containing the byte array to hash - * @param length length of the byte array - * @return the checksum over the buffer bytes - **/ -static inline uint16_t crc_calculate(const uint8_t* pBuffer, uint16_t length) -{ - uint16_t crcTmp; - crc_init(&crcTmp); - while (length--) { - crc_accumulate(*pBuffer++, &crcTmp); - } - return crcTmp; -} - -/** - * @brief Accumulate the X.25 CRC by adding an array of bytes - * - * The checksum function adds the hash of one char at a time to the - * 16 bit checksum (uint16_t). - * - * @param data new bytes to hash - * @param crcAccum the already accumulated checksum - **/ -static inline void crc_accumulate_buffer(uint16_t *crcAccum, const char *pBuffer, uint8_t length) -{ - const uint8_t *p = (const uint8_t *)pBuffer; - while (length--) { - crc_accumulate(*p++, crcAccum); - } -} - - - - -#endif /* _CHECKSUM_H_ */ - -#ifdef __cplusplus -} -#endif |