HDLC_CRC_32_CCITT
case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
case HDLC_CRC_32_CCITT: crc_size = 4; break;