crc.c

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/**************************************************************************/
#include "NuMicro.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 CHKSINIT bit will reload the initial seed value(CRC_SEED register) to CRC controller */
    CRC->CTL |= CRC_CTL_CHKSINIT_Msk;
}

uint32_t CRC_GetChecksum(void)
{
    uint32_t ret;

    switch(CRC->CTL & CRC_CTL_CRCMODE_Msk)
    {
    case CRC_CCITT:
    case CRC_16:
        ret = (CRC->CHECKSUM & 0xFFFFU);
        break;
    case CRC_32:
        ret = (CRC->CHECKSUM);
        break;
    case CRC_8:
        ret = (CRC->CHECKSUM & 0xFFU);
        break;
    default:
        ret = 0U;
        break;
    }

    return ret;
}
 /* end of group CRC_EXPORTED_FUNCTIONS */
 /* end of group CRC_Driver */
 /* end of group Standard_Driver */

/*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/