15 lines
415 B
C
15 lines
415 B
C
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#pragma once
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#include <stdint.h>
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#include "pico/stdlib.h"
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// Calc CRC5-USB of 11bit data
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uint8_t calc_usb_crc5(uint16_t data);
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// Calc CRC16-USB of array
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uint16_t calc_usb_crc16(const uint8_t *data, uint16_t len);
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extern const uint16_t crc16_tbl[256];
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static inline uint16_t __time_critical_func(update_usb_crc16)(uint16_t crc, uint8_t data) {
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crc = (crc >> 8) ^ crc16_tbl[(crc ^ data) & 0xff];
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return crc;
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}
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