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CHG: had to move the SwapBits method.

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iceman1001
2016-02-12 16:19:18 +01:00
parent 6b6815bccb
commit 6bb7609cad
4 changed files with 13 additions and 13 deletions
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12
common/crc.c
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@@ -7,7 +7,6 @@
//-----------------------------------------------------------------------------
#include "crc.h"
#include "util.h"
#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
@@ -44,8 +43,7 @@ uint32_t crc_finish(crc_t *crc)
}
//credits to iceman
uint32_t CRC8Maxim(uint8_t *buff, size_t size)
{
uint32_t CRC8Maxim(uint8_t *buff, size_t size) {
crc_t crc;
crc_init(&crc, 9, 0x8c, 0x00, 0x00);
crc_clear(&crc);
@@ -68,10 +66,4 @@ uint32_t CRC8Legic(uint8_t *buff, size_t size) {
return SwapBits(crc_finish(&crc), 8);
}
uint32_t SwapBits(uint32_t value, int nrbits) {
uint32_t newvalue = 0;
for(int i = 0; i < nrbits; i++) {
newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
}
return newvalue;
}

1
common/crc.h
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@@ -42,7 +42,6 @@ uint32_t CRC8Maxim(uint8_t *buff, size_t size);
// Calculate CRC-8/Legic checksum
uint32_t CRC8Legic(uint8_t *buff, size_t size);
uint32_t SwapBits(uint32_t value, int nrbits);
/* Static initialization of a crc structure */
#define CRC_INITIALIZER(_order, _polynom, _initial_value, _final_xor) { \