+/*--- hardware/common/usb.c -------------------------------------------------*/
+
+#ifdef HAVE_LIBUSB_1_0
+SR_PRIV GSList *sr_usb_connect(libusb_context *usb_ctx, const char *conn);
+SR_PRIV int sr_usb_open(libusb_context *usb_ctx, struct sr_usb_dev_inst *usb);
+#endif
+
+/*--- hardware/common/dmm/fs9922.c ------------------------------------------*/
+
+SR_PRIV int sr_dmm_parse_fs9922(const uint8_t *buf, float *floatval,
+ struct sr_datafeed_analog *analog);
+
+/*--- hardware/common/dmm/fs9721.c ------------------------------------------*/
+
+#define FS9721_PACKET_SIZE 14
+
+struct fs9721_info {
+ gboolean is_ac, is_dc, is_auto, is_rs232, is_micro, is_nano, is_kilo;
+ gboolean is_diode, is_milli, is_percent, is_mega, is_beep, is_farad;
+ gboolean is_ohm, is_rel, is_hold, is_ampere, is_volt, is_hz, is_bat;
+ gboolean is_c2c1_11, is_c2c1_10, is_c2c1_01, is_c2c1_00, is_sign;
+};
+
+SR_PRIV gboolean sr_fs9721_is_packet_start(uint8_t b);
+SR_PRIV gboolean sr_fs9721_packet_valid(const uint8_t *buf);
+SR_PRIV int sr_fs9721_parse(const uint8_t *buf, float *floatval,
+ struct sr_datafeed_analog *analog,
+ struct fs9721_info *info);
+