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- #include "crc.h"
- #include "compiler_abstraction.h"
- static __INLINE uint16_t crc16_get(uint16_t current_crc, uint8_t byte)
- {
- static const uint16_t crc16_table[16] =
- {
- 0x0000, 0xCC01, 0xD801, 0x1400, 0xF001, 0x3C00, 0x2800, 0xE401,
- 0xA001, 0x6C00, 0x7800, 0xB401, 0x5000, 0x9C01, 0x8801, 0x4400
- };
- uint16_t temp;
-
- temp = crc16_table[current_crc & 0xF];
- current_crc = (current_crc >> 4u) & 0x0FFFu;
- current_crc = current_crc ^ temp ^ crc16_table[byte & 0xF];
-
- temp = crc16_table[current_crc & 0xF];
- current_crc = (current_crc >> 4u) & 0x0FFFu;
- current_crc = current_crc ^ temp ^ crc16_table[(byte >> 4u) & 0xF];
- return current_crc;
- }
- uint16_t crc_crc16_update(uint16_t current_crc, const volatile void * p_data, uint32_t size)
- {
- uint8_t * p_block = (uint8_t *)p_data;
- while (size != 0)
- {
- current_crc = crc16_get(current_crc, *p_block);
- p_block++;
- size--;
- }
- return current_crc;
- }
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