1*b3de343eSJohn Chung /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ 2*b3de343eSJohn Chung 3*b3de343eSJohn Chung #ifndef _CRC_16_CCITT_H 4*b3de343eSJohn Chung #define _CRC_16_CCITT_H 5*b3de343eSJohn Chung 6*b3de343eSJohn Chung #include <stdint.h> 7*b3de343eSJohn Chung 8*b3de343eSJohn Chung #define FCS_INIT_16 0xFFFF /* Initial FCS value */ 9*b3de343eSJohn Chung 10*b3de343eSJohn Chung uint16_t crc_16_ccitt(uint16_t fcs, const uint8_t *cp, uint32_t len); 11*b3de343eSJohn Chung 12*b3de343eSJohn Chung uint16_t crc_16_ccitt_byte(uint16_t fcs, const uint8_t c); 13*b3de343eSJohn Chung 14*b3de343eSJohn Chung #endif 15