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Even more v2.2

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This commit is contained in:
Gunnar Skjold
2022-12-02 20:38:56 +01:00
parent 0927cab8e2
commit b07ed075f4
38 changed files with 68 additions and 25 deletions
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12
lib/AmsDecoder/src/crc.cpp Normal file
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#include "crc.h"
uint16_t crc16_x25(const uint8_t* p, int len)
{
uint16_t crc = UINT16_MAX;
while(len--)
for (uint16_t i = 0, d = 0xff & *p++; i < 8; i++, d >>= 1)
crc = ((crc & 1) ^ (d & 1)) ? (crc >> 1) ^ 0x8408 : (crc >> 1);
return (~crc << 8) | (~crc >> 8 & 0xff);
}