crc.c

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/**************************************************************************/
#include "M4521.h"
 
 
void CRC_Open(uint32_t u32Mode, uint32_t u32Attribute, uint32_t u32Seed, uint32_t u32DataLen)
{
    CRC->SEED = u32Seed;
    CRC->CTL = u32Mode | u32Attribute | u32DataLen | CRC_CTL_CRCEN_Msk;
 
    /* Setting CRCRST bit will reload the initial seed value(CRC_SEED register) to CRC controller */
    CRC->CTL |= CRC_CTL_CRCRST_Msk;
}
 
uint32_t CRC_GetChecksum(void)
{
    switch(CRC->CTL & CRC_CTL_CRCMODE_Msk)
    {
    case CRC_CCITT:
    case CRC_16:
        return (CRC->CHECKSUM & 0xFFFF);
 
    case CRC_32:
        return (CRC->CHECKSUM);
 
    case CRC_8:
        return (CRC->CHECKSUM & 0xFF);
 
    default:
        return 0;
    }
}
 /* end of group CRC_EXPORTED_FUNCTIONS */
 /* end of group CRC_Driver */
 /* end of group Standard_Driver */
 
/*** (C) COPYRIGHT 2022 Nuvoton Technology Corp. ***/