X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fhantek-6xxx%2Fprotocol.c;h=a43f72bbb546247abcd8ce68cfce68c19478d501;hb=364b09c2a936fd7e98a879c3532fcd2fee4c1e0a;hp=4c2b8cdaf76dbd817835f52572ef436b25e9bde6;hpb=c940b7a32f0bad7fe50e8b3d6772f208beb71faa;p=libsigrok.git

diff --git a/src/hardware/hantek-6xxx/protocol.c b/src/hardware/hantek-6xxx/protocol.c
index 4c2b8cda..a43f72bb 100644
--- a/src/hardware/hantek-6xxx/protocol.c
+++ b/src/hardware/hantek-6xxx/protocol.c
@@ -123,7 +123,7 @@ SR_PRIV int hantek_6xxx_get_channeldata(const struct sr_dev_inst *sdi,
 	transfer = libusb_alloc_transfer(0);
 	libusb_fill_bulk_transfer(transfer, usb->devhdl, HANTEK_EP_IN, buf,
 			data_amount, cb, (void *)sdi, 4000);
-	if ((ret = libusb_submit_transfer(transfer)) != 0) {
+	if ((ret = libusb_submit_transfer(transfer)) < 0) {
 		sr_err("Failed to submit transfer: %s.",
 			libusb_error_name(ret));
 		/* TODO: Free them all. */
@@ -215,6 +215,20 @@ SR_PRIV int hantek_6xxx_update_vdiv(const struct sr_dev_inst *sdi)
 	return MIN(ret1, ret2);
 }
 
+SR_PRIV int hantek_6xxx_update_coupling(const struct sr_dev_inst *sdi)
+{
+	struct dev_context *devc = sdi->priv;
+	uint8_t coupling = 0xFF & ((devc->coupling[1] << 4) | devc->coupling[0]);
+
+	if (devc->has_coupling) {
+		sr_dbg("update coupling 0x%x", coupling);
+		return write_control(sdi, COUPLING_REG, coupling);
+	} else {
+		sr_dbg("coupling not supported");
+		return SR_OK;
+	}
+}
+
 SR_PRIV int hantek_6xxx_update_channels(const struct sr_dev_inst *sdi)
 {
 	struct dev_context *devc = sdi->priv;
@@ -230,6 +244,7 @@ SR_PRIV int hantek_6xxx_init(const struct sr_dev_inst *sdi)
 
 	hantek_6xxx_update_samplerate(sdi);
 	hantek_6xxx_update_vdiv(sdi);
+	hantek_6xxx_update_coupling(sdi);
 	// hantek_6xxx_update_channels(sdi); /* Only 2 channel mode supported. */
 
 	return SR_OK;