sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P2");
sdi->inst_type = SR_INST_USB;
sdi->conn = usb;
sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P2");
sdi->inst_type = SR_INST_USB;
sdi->conn = usb;