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feat(util): Refactor CRC algorithm

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This commit is contained in:
Dong Heng
2018-11-08 12:42:21 +08:00
committed by dongheng
parent bc01a1d39c
commit 17fc3ab6ba
2 changed files with 84 additions and 2 deletions
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5
components/util/src/crc.c
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@ -15,6 +15,7 @@
#include <stdint.h>
#include "crc.h"
#include "ibus_data.h"
static const uint32_t crc32_le_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
@ -113,7 +114,7 @@ uint16_t crc16_le(uint16_t crc, const uint8_t* buf, uint32_t len)
crc = ~crc;
for (i = 0; i < len; i++) {
crc = crc16_le_table[(crc ^ buf[i]) & 0xff] ^ (crc >> 8);
crc = ESP_IBUS_GET_U16_DATA((crc ^ buf[i]) & 0xff, crc16_le_table) ^ (crc >> 8);
}
return ~crc;
@ -137,7 +138,7 @@ uint8_t esp_crc8(uint8_t const* p, uint32_t len)
uint8_t crc = 0x00;
while (len--) {
crc = crc8_le_table[crc ^ *p++];
crc = ESP_IBUS_GET_U8_DATA(crc ^ *p++, crc8_le_table);
}
return crc;