scpi-pps: Implement init_acquisition() and update_status() for HP 66xxB power supplies.

[libsigrok.git] / src / hardware / scpi-pps / protocol.c

diff --git a/src/hardware/scpi-pps/protocol.c b/src/hardware/scpi-pps/protocol.c
index 477175872430d7da9db7b608ff26eb72c80106f2..762fcae1ec8ed434a3095ad4cb410f617bcecd04 100644 (file)
--- a/src/hardware/scpi-pps/protocol.c
+++ b/src/hardware/scpi-pps/protocol.c
@@ -2,6 +2,7 @@
  * This file is part of the libsigrok project.
  *
  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
+ * Copyright (C) 2019 Frank Stettner <frank-stettner@gmx.net>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,6 +28,7 @@
 SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
 {
        struct dev_context *devc;
+       const struct scpi_pps *device;
        struct sr_datafeed_packet packet;
        struct sr_datafeed_analog analog;
        struct sr_analog_encoding encoding;
@@ -52,6 +54,9 @@ SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
        if (!(devc = sdi->priv))
                return TRUE;
 
+       if (!(device = devc->device))
+               return TRUE;
+
        pch = devc->cur_acquisition_channel->priv;
 
        channel_group_cmd = 0;
@@ -61,6 +66,15 @@ SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
                channel_group_name = pch->hwname;
        }
 
+       /*
+        * When the current channel is the first in the array, perform the device
+        * specific status update first.
+        */
+       if (devc->cur_acquisition_channel == sr_next_enabled_channel(sdi, NULL) &&
+               device->update_status) {
+               device->update_status(sdi);
+       }
+
        if (pch->mq == SR_MQ_VOLTAGE) {
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_MEAS_VOLTAGE;