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Code Issues Releases Wiki Activity

Add standardized CRC helper functions (#4798)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Mat931
2023-07-30 21:45:56 +00:00
committed by GitHub
parent 9aa5ee3372
commit 98bf427600
6 changed files with 104 additions and 97 deletions
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5
esphome/core/helpers.h
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@@ -155,7 +155,10 @@ template<typename T, typename U> T remap(U value, U min, U max, T min_out, T max
uint8_t crc8(uint8_t *data, uint8_t len);
/// Calculate a CRC-16 checksum of \p data with size \p len.
uint16_t crc16(const uint8_t *data, uint8_t len);
uint16_t crc16(const uint8_t *data, uint16_t len, uint16_t crc = 0xffff, uint16_t reverse_poly = 0xa001,
bool refin = false, bool refout = false);
uint16_t crc16be(const uint8_t *data, uint16_t len, uint16_t crc = 0, uint16_t poly = 0x1021, bool refin = false,
bool refout = false);
/// Calculate a FNV-1 hash of \p str.
uint32_t fnv1_hash(const std::string &str);