/* deinit CRC calculation unit 
, V1.0.0, firmware for GD32F1x0(x=3,5) , V2.0.0, firmware for GD32F1x0(x=3,5,7,9) , V3.0.0, firmware update for GD32F1x0(x=3,5,7,9) */
void crc_deinit(void)
/* deinit CRC calculation unit 
, V1.0.0, firmware for GD32F1x0(x=3,5) , V2.0.0, firmware for GD32F1x0(x=3,5,7,9) , V3.0.0, firmware update for GD32F1x0(x=3,5,7,9) */
void crc_deinit(void)
{
    CRC_IDATA = 0xFFFFFFFF;
    CRC_DATA  = 0xFFFFFFFF;
    CRC_FDATA = 0x00;
    CRC_CTL   = CRC_CTL_RST;
}