SR_PRIV int testo_probe_channels(struct sr_dev_inst *sdi);
SR_PRIV void receive_transfer(struct libusb_transfer *transfer);
SR_PRIV int testo_request_packet(const struct sr_dev_inst *sdi);
-SR_PRIV gboolean testo_check_packet(unsigned char *buf, int len);
+SR_PRIV gboolean testo_check_packet_prefix(unsigned char *buf, int len);
+SR_PRIV uint16_t crc16_mcrf4xx(uint16_t crc, uint8_t *data, size_t len);
SR_PRIV void testo_receive_packet(const struct sr_dev_inst *sdi);
#endif