36 lines
682 B
C
36 lines
682 B
C
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#include <crc32.h>
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static uint32_t CRC32_Table[256U];
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void CRC32_Init(void)
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{
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uint32_t c;
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for (uint32_t i = 0U; i < 256U; i++) {
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c = i;
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for (uint32_t j = 0U; j < 8U; j++) {
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if ((c & 0x01U)!= 0U){
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c = 0xEDB88320UL ^ (c >> 1U);
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}else{
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c = c >> 1U;
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}
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}
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CRC32_Table[i] = c;
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}
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}
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uint32_t CRC32_GetRunTimeCRC32(uint8_t *pBuf ,uint16_t length)
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{
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uint32_t retCRCValue = 0xFFFFFFFFU;
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for (uint16_t i = 0; i < length; i++){
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retCRCValue=CRC32_Table[(retCRCValue ^ pBuf[i]) & 0xFFU] ^ (retCRCValue >> 8U);
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}
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return (retCRCValue^0xFFFFFFFFU);
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}
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