]> sigrok.org Git - libsigrok.git/blobdiff - hardware/rigol-ds/api.c
rigol-ds: Correct digital waveform block sizes.
[libsigrok.git] / hardware / rigol-ds / api.c
index d4ae829ad76d96628a36c0d42778457284782b3a..44847c715be75612d1bc97453ec02f48fd2ea459 100644 (file)
@@ -40,6 +40,8 @@ static const int32_t hwcaps[] = {
        SR_CONF_TRIGGER_SLOPE,
        SR_CONF_HORIZ_TRIGGERPOS,
        SR_CONF_NUM_TIMEBASE,
+       SR_CONF_LIMIT_FRAMES,
+       SR_CONF_SAMPLERATE,
 };
 
 static const int32_t analog_hwcaps[] = {
@@ -117,6 +119,8 @@ static const uint64_t vdivs[][2] = {
 static const char *trigger_sources[] = {
        "CH1",
        "CH2",
+       "CH3",
+       "CH4",
        "EXT",
        "AC Line",
        "D0",
@@ -154,26 +158,41 @@ static const char *data_sources[] = {
  * name, series, protocol flavor, min timebase, max timebase, min vdiv,
  * digital channels, number of horizontal divs
  */
+
+#define RIGOL "Rigol Technologies"
+#define AGILENT "Agilent Technologies"
+
 static const struct rigol_ds_model supported_models[] = {
-       {"DS1052E", RIGOL_DS1000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, false, 12},
-       {"DS1102E", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, false, 12},
-       {"DS1152E", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, false, 12},
-       {"DS1052D", RIGOL_DS1000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, true, 12},
-       {"DS1102D", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, true, 12},
-       {"DS1152D", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, true, 12},
-       {"DS2072", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {500, 1}, {500, 1000000}, false, 14},
-       {"DS2102", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {500, 1}, {500, 1000000}, false, 14},
-       {"DS2202", RIGOL_DS2000, PROTOCOL_IEEE488_2, {2, 1000000000}, {500, 1}, {500, 1000000}, false, 14},
-       {"VS5022", RIGOL_VS5000, PROTOCOL_LEGACY, {20, 1000000000}, {50, 1}, {2, 1000}, false, 14},
-       {"VS5022D", RIGOL_VS5000, PROTOCOL_LEGACY, {20, 1000000000}, {50, 1}, {2, 1000}, true, 14},
-       {"VS5042", RIGOL_VS5000, PROTOCOL_LEGACY, {10, 1000000000}, {50, 1}, {2, 1000}, false, 14},
-       {"VS5042D", RIGOL_VS5000, PROTOCOL_LEGACY, {10, 1000000000}, {50, 1}, {2, 1000}, true, 14},
-       {"VS5062", RIGOL_VS5000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, false, 14},
-       {"VS5062D", RIGOL_VS5000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, true, 14},
-       {"VS5102", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, false, 14},
-       {"VS5102D", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, true, 14},
-       {"VS5202", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, false, 14},
-       {"VS5202D", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, true, 14},
+       {RIGOL, "DS1052E", RIGOL_DS1000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {RIGOL, "DS1102E", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {RIGOL, "DS1152E", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {RIGOL, "DS1052D", RIGOL_DS1000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, 2, true, 12},
+       {RIGOL, "DS1102D", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, true, 12},
+       {RIGOL, "DS1152D", RIGOL_DS1000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, true, 12},
+       {RIGOL, "DS2072", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {500, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2102", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {500, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2202", RIGOL_DS2000, PROTOCOL_IEEE488_2, {2, 1000000000}, {500, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2302", RIGOL_DS2000, PROTOCOL_IEEE488_2, {1, 1000000000}, {1000, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2072A", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {1000, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2102A", RIGOL_DS2000, PROTOCOL_IEEE488_2, {5, 1000000000}, {1000, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2202A", RIGOL_DS2000, PROTOCOL_IEEE488_2, {2, 1000000000}, {1000, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "DS2302A", RIGOL_DS2000, PROTOCOL_IEEE488_2, {1, 1000000000}, {1000, 1}, {500, 1000000}, 2, false, 14},
+       {RIGOL, "VS5022", RIGOL_VS5000, PROTOCOL_LEGACY, {20, 1000000000}, {50, 1}, {2, 1000}, 2, false, 14},
+       {RIGOL, "VS5022D", RIGOL_VS5000, PROTOCOL_LEGACY, {20, 1000000000}, {50, 1}, {2, 1000}, 2, true, 14},
+       {RIGOL, "VS5042", RIGOL_VS5000, PROTOCOL_LEGACY, {10, 1000000000}, {50, 1}, {2, 1000}, 2, false, 14},
+       {RIGOL, "VS5042D", RIGOL_VS5000, PROTOCOL_LEGACY, {10, 1000000000}, {50, 1}, {2, 1000}, 2, true, 14},
+       {RIGOL, "VS5062", RIGOL_VS5000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, 2, false, 14},
+       {RIGOL, "VS5062D", RIGOL_VS5000, PROTOCOL_LEGACY, {5, 1000000000}, {50, 1}, {2, 1000}, 2, true, 14},
+       {RIGOL, "VS5102", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 14},
+       {RIGOL, "VS5102D", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, true, 14},
+       {RIGOL, "VS5202", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 14},
+       {RIGOL, "VS5202D", RIGOL_VS5000, PROTOCOL_LEGACY, {2, 1000000000}, {50, 1}, {2, 1000}, 2, true, 14},
+       {AGILENT, "DSO1002A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {5, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {AGILENT, "DSO1004A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {5, 1000000000}, {50, 1}, {2, 1000}, 4, false, 12},
+       {AGILENT, "DSO1012A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {AGILENT, "DSO1014A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {2, 1000000000}, {50, 1}, {2, 1000}, 4, false, 12},
+       {AGILENT, "DSO1022A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {2, 1000000000}, {50, 1}, {2, 1000}, 2, false, 12},
+       {AGILENT, "DSO1024A", AGILENT_DSO1000, PROTOCOL_IEEE488_2, {2, 1000000000}, {50, 1}, {2, 1000}, 4, false, 12},
 };
 
 SR_PRIV struct sr_dev_driver rigol_ds_driver_info;
@@ -229,9 +248,6 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
 {
        struct dev_context *devc;
        struct sr_dev_inst *sdi;
-       const char *usbtmc_prefix = "/dev/usbtmc";
-       const char *tcp_prefix = "tcp/";
-       gchar **tokens, *address, *port;
        struct sr_scpi_dev_inst *scpi;
        struct sr_scpi_hw_info *hw_info;
        struct sr_probe *probe;
@@ -241,31 +257,11 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
 
        *devices = NULL;
 
-       if (strncmp(resource, usbtmc_prefix, strlen(usbtmc_prefix)) == 0) {
-               sr_dbg("Opening USBTMC device %s.", resource);
-               if (!(scpi = scpi_usbtmc_dev_inst_new(resource)))
-                       return SR_ERR_MALLOC;
-       } else if (strncmp(resource, tcp_prefix, strlen(tcp_prefix)) == 0) {
-               sr_dbg("Opening TCP connection %s.", resource);
-               tokens = g_strsplit(resource + strlen(tcp_prefix), "/", 0);
-               address = tokens[0];
-               port = tokens[1];
-               if (!address || !port || tokens[2]) {
-                       sr_err("Invalid parameters.");
-                       g_strfreev(tokens);
-                       return SR_ERR_ARG;
-               }
-               scpi = scpi_tcp_dev_inst_new(address, port);
-               g_strfreev(tokens);
-               if (!scpi)
-                       return SR_ERR_MALLOC;
-       } else {
-               sr_dbg("Opening serial device %s.", resource);
-               if (!(scpi = scpi_serial_dev_inst_new(resource, serialcomm)))
-                       return SR_ERR_MALLOC;
-       }
+       if (!(scpi = scpi_dev_inst_new(resource, serialcomm)))
+               return SR_ERR;
 
        if (sr_scpi_open(scpi) != SR_OK) {
+               sr_info("Couldn't open SCPI device.");
                sr_scpi_free(scpi);
                return SR_ERR;
        };
@@ -277,15 +273,9 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
                return SR_ERR;
        }
 
-       if (strcasecmp(hw_info->manufacturer, "Rigol Technologies")) {
-               sr_scpi_hw_info_free(hw_info);
-               sr_scpi_close(scpi);
-               sr_scpi_free(scpi);
-               return SR_ERR_NA;
-       }
-
        for (i = 0; i < ARRAY_SIZE(supported_models); i++) {
-               if (!strcmp(hw_info->model, supported_models[i].name)) {
+               if (!strcasecmp(hw_info->manufacturer, supported_models[i].vendor) &&
+                               !strcmp(hw_info->model, supported_models[i].name)) {
                        model = &supported_models[i];
                        break;
                }
@@ -314,10 +304,10 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
        devc->limit_frames = 0;
        devc->model = model;
 
-       for (i = 0; i < 2; i++) {
-               channel_name = (i == 0 ? "CH1" : "CH2");
-               if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, channel_name)))
+       for (i = 0; i < model->analog_channels; i++) {
+               if (!(channel_name = g_strdup_printf("CH%d", i + 1)))
                        return SR_ERR_MALLOC;
+               probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE, channel_name);
                sdi->probes = g_slist_append(sdi->probes, probe);
                devc->analog_groups[i].name = channel_name;
                devc->analog_groups[i].probes = g_slist_append(NULL, probe);
@@ -349,12 +339,9 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
                        devc->num_timebases = &timebases[i] - devc->timebases + 1;
        }
 
-       for (i = 0; i < NUM_VDIV; i++) {
-               if (!memcmp(&devc->model->min_vdiv, &vdivs[i], sizeof(uint64_t[2]))) {
+       for (i = 0; i < NUM_VDIV; i++)
+               if (!memcmp(&devc->model->min_vdiv, &vdivs[i], sizeof(uint64_t[2])))
                        devc->vdivs = &vdivs[i];
-                       devc->num_vdivs = NUM_VDIV - (&vdivs[i] - &vdivs[0]);
-               }
-       }
 
        if (!(devc->buffer = g_try_malloc(ACQ_BUFFER_SIZE)))
                return SR_ERR_MALLOC;
@@ -470,40 +457,73 @@ static int cleanup(void)
        return dev_clear();
 }
 
+static int analog_frame_size(const struct sr_dev_inst *sdi)
+{
+       struct dev_context *devc = sdi->priv;
+       struct sr_probe *probe;
+       int analog_probes = 0;
+       GSList *l;
+
+       if (devc->model->protocol == PROTOCOL_LEGACY) {
+               if (devc->model->series == RIGOL_VS5000)
+                       return VS5000_ANALOG_LIVE_WAVEFORM_SIZE;
+               else
+                       return DS1000_ANALOG_LIVE_WAVEFORM_SIZE;
+       } else {
+               for (l = sdi->probes; l; l = l->next) {
+                       probe = l->data;
+                       if (probe->type == SR_PROBE_ANALOG && probe->enabled)
+                               analog_probes++;
+               }
+               if (devc->data_source == DATA_SOURCE_MEMORY) {
+                       if (analog_probes == 1)
+                               return DS2000_ANALOG_MEM_WAVEFORM_SIZE_1C;
+                       else
+                               return DS2000_ANALOG_MEM_WAVEFORM_SIZE_2C;
+               } else {
+                       if (devc->model->series == AGILENT_DSO1000)
+                               return DSO1000_ANALOG_LIVE_WAVEFORM_SIZE;
+                       else
+                               return DS2000_ANALOG_LIVE_WAVEFORM_SIZE;
+               }
+       }
+}
+
+static int digital_frame_size(const struct sr_dev_inst *sdi)
+{
+       struct dev_context *devc = sdi->priv;
+
+       switch (devc->model->series) {
+       case RIGOL_VS5000:
+               return VS5000_DIGITAL_WAVEFORM_SIZE;
+       case RIGOL_DS1000:
+               return DS1000_DIGITAL_WAVEFORM_SIZE;
+       default:
+               return 0;
+       }
+}
+
 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
                const struct sr_probe_group *probe_group)
 {
        struct dev_context *devc;
-       unsigned int i;
+       uint64_t samplerate;
 
        if (!sdi || !(devc = sdi->priv))
                return SR_ERR_ARG;
 
        /* If a probe group is specified, it must be a valid one. */
-       if (probe_group) {
-               if (probe_group != &devc->analog_groups[0]
-                               && probe_group != &devc->analog_groups[1]) {
-                       sr_err("Invalid probe group specified.");
-                       return SR_ERR;
-               }
+       if (probe_group && !g_slist_find(sdi->probe_groups, probe_group)) {
+               sr_err("Invalid probe group specified.");
+               return SR_ERR;
        }
 
        switch (id) {
        case SR_CONF_NUM_TIMEBASE:
-               *data = g_variant_new_int32(devc->num_timebases);
+               *data = g_variant_new_int32(devc->model->num_horizontal_divs);
                break;
        case SR_CONF_NUM_VDIV:
-               if (!probe_group) {
-                       sr_err("No probe group specified.");
-                       return SR_ERR_PROBE_GROUP;
-               }
-               for (i = 0; i < 2; i++) {
-                       if (probe_group == &devc->analog_groups[i]) {
-                               *data = g_variant_new_int32(devc->num_vdivs);
-                               return SR_OK;
-                       }
-               }
-               return SR_ERR_NA;
+               *data = g_variant_new_int32(8);
        case SR_CONF_DATA_SOURCE:
                if (devc->data_source == DATA_SOURCE_LIVE)
                        *data = g_variant_new_string("Live");
@@ -512,6 +532,15 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
                else
                        *data = g_variant_new_string("Segmented");
                break;
+       case SR_CONF_SAMPLERATE:
+               if (devc->data_source == DATA_SOURCE_LIVE) {
+                       samplerate = analog_frame_size(sdi) /
+                               (devc->timebase * devc->model->num_horizontal_divs);
+                       *data = g_variant_new_uint64(samplerate);
+               } else {
+                       return SR_ERR_NA;
+               }
+               break;
        default:
                return SR_ERR_NA;
        }
@@ -536,12 +565,9 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
                return SR_ERR_DEV_CLOSED;
 
        /* If a probe group is specified, it must be a valid one. */
-       if (probe_group) {
-               if (probe_group != &devc->analog_groups[0]
-                               && probe_group != &devc->analog_groups[1]) {
-                       sr_err("Invalid probe group specified.");
-                       return SR_ERR;
-               }
+       if (probe_group && !g_slist_find(sdi->probe_groups, probe_group)) {
+               sr_err("Invalid probe group specified.");
+               return SR_ERR;
        }
 
        ret = SR_OK;
@@ -591,6 +617,10 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
                                        tmp_str = "CHAN1";
                                else if (!strcmp(devc->trigger_source, "CH2"))
                                        tmp_str = "CHAN2";
+                               else if (!strcmp(devc->trigger_source, "CH3"))
+                                       tmp_str = "CHAN3";
+                               else if (!strcmp(devc->trigger_source, "CH4"))
+                                       tmp_str = "CHAN4";
                                else
                                        tmp_str = (char *)devc->trigger_source;
                                ret = set_cfg(sdi, ":TRIG:EDGE:SOUR %s", tmp_str);
@@ -694,7 +724,6 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
        }
 
        switch (key) {
-               break;
        case SR_CONF_DEVICE_OPTIONS:
                if (!probe_group) {
                        sr_err("No probe group specified.");
@@ -731,7 +760,7 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
                        return SR_ERR_PROBE_GROUP;
                }
                g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
-               for (i = 0; i < devc->num_vdivs; i++) {
+               for (i = 0; i < NUM_VDIV; i++) {
                        rational[0] = g_variant_new_uint64(devc->vdivs[i][0]);
                        rational[1] = g_variant_new_uint64(devc->vdivs[i][1]);
                        tuple = g_variant_new_tuple(rational, 2);
@@ -743,6 +772,8 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
                if (!devc)
                        /* Can't know this until we have the exact model. */
                        return SR_ERR_ARG;
+               if (devc->num_timebases <= 0)
+                       return SR_ERR_NA;
                g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
                for (i = 0; i < devc->num_timebases; i++) {
                        rational[0] = g_variant_new_uint64(devc->timebases[i][0]);
@@ -782,7 +813,6 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
        struct dev_context *devc;
        struct sr_probe *probe;
        GSList *l;
-       char cmd[256];
 
        if (sdi->status != SR_ST_ACTIVE)
                return SR_ERR_DEV_CLOSED;
@@ -790,18 +820,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
        scpi = sdi->conn;
        devc = sdi->priv;
 
-       if (devc->data_source == DATA_SOURCE_LIVE) {
-               if (sr_scpi_send(sdi->conn, ":RUN") != SR_OK)
-                       return SR_ERR;
-       } else if (devc->data_source == DATA_SOURCE_MEMORY) {
-               if (devc->model->series != RIGOL_DS2000) {
-                       sr_err("Data source 'Memory' not supported for this device");
-                       return SR_ERR;
-               }
-       } else if (devc->data_source == DATA_SOURCE_SEGMENTED) {
-               sr_err("Data source 'Segmented' not yet supported");
-               return SR_ERR;
-       }
+       devc->num_frames = 0;
 
        for (l = sdi->probes; l; l = l->next) {
                probe = l->data;
@@ -812,67 +831,83 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
                                                devc->enabled_analog_probes, probe);
                        if (probe->enabled != devc->analog_channels[probe->index]) {
                                /* Enabled channel is currently disabled, or vice versa. */
-                               sprintf(cmd, ":CHAN%d:DISP %s", probe->index + 1,
-                                               probe->enabled ? "ON" : "OFF");
-                               if (sr_scpi_send(sdi->conn, cmd) != SR_OK)
+                               if (set_cfg(sdi, ":CHAN%d:DISP %s", probe->index + 1,
+                                               probe->enabled ? "ON" : "OFF") != SR_OK)
                                        return SR_ERR;
+                               devc->analog_channels[probe->index] = probe->enabled;
                        }
                } else if (probe->type == SR_PROBE_LOGIC) {
-                       if (probe->enabled)
+                       if (probe->enabled) {
                                devc->enabled_digital_probes = g_slist_append(
                                                devc->enabled_digital_probes, probe);
+                               /* Turn on LA module if currently off. */
+                               if (!devc->la_enabled) {
+                                       if (set_cfg(sdi, ":LA:DISP ON") != SR_OK)
+                                               return SR_ERR;
+                                       devc->la_enabled = TRUE;
+                               }
+                       }
                        if (probe->enabled != devc->digital_channels[probe->index]) {
                                /* Enabled channel is currently disabled, or vice versa. */
-                               sprintf(cmd, ":DIG%d:TURN %s", probe->index,
-                                               probe->enabled ? "ON" : "OFF");
-                               if (sr_scpi_send(sdi->conn, cmd) != SR_OK)
+                               if (set_cfg(sdi, ":DIG%d:TURN %s", probe->index,
+                                               probe->enabled ? "ON" : "OFF") != SR_OK)
                                        return SR_ERR;
+                               devc->digital_channels[probe->index] = probe->enabled;
                        }
                }
        }
+
        if (!devc->enabled_analog_probes && !devc->enabled_digital_probes)
                return SR_ERR;
 
+       /* Turn off LA module if on and no digital probes selected. */
+       if (devc->la_enabled && !devc->enabled_digital_probes)
+               if (set_cfg(sdi, ":LA:DISP OFF") != SR_OK)
+                       return SR_ERR;
+
+       if (devc->data_source == DATA_SOURCE_LIVE) {
+               if (set_cfg(sdi, ":RUN") != SR_OK)
+                       return SR_ERR;
+       } else if (devc->data_source == DATA_SOURCE_MEMORY) {
+               if (devc->model->series != RIGOL_DS2000) {
+                       sr_err("Data source 'Memory' not supported for this device");
+                       return SR_ERR;
+               }
+       } else if (devc->data_source == DATA_SOURCE_SEGMENTED) {
+               sr_err("Data source 'Segmented' not yet supported");
+               return SR_ERR;
+       }
+
        sr_scpi_source_add(scpi, G_IO_IN, 50, rigol_ds_receive, (void *)sdi);
 
        /* Send header packet to the session bus. */
        std_session_send_df_header(cb_data, LOG_PREFIX);
 
+       if (devc->enabled_analog_probes)
+               devc->channel_entry = devc->enabled_analog_probes;
+       else
+               devc->channel_entry = devc->enabled_digital_probes;
+
+       devc->analog_frame_size = analog_frame_size(sdi);
+       devc->digital_frame_size = digital_frame_size(sdi);
+
        if (devc->model->protocol == PROTOCOL_LEGACY) {
                /* Fetch the first frame. */
-               if (devc->enabled_analog_probes) {
-                       devc->analog_frame_size = DS1000_ANALOG_LIVE_WAVEFORM_SIZE;
-                       devc->channel = devc->enabled_analog_probes->data;
-                       if (sr_scpi_send(sdi->conn, ":WAV:DATA? CHAN%d",
-                                       devc->channel->index + 1) != SR_OK)
-                               return SR_ERR;
-               } else {
-                       devc->channel = devc->enabled_digital_probes->data;
-                       if (sr_scpi_send(sdi->conn, ":WAV:DATA? DIG") != SR_OK)
-                               return SR_ERR;
-               }
-
-               devc->num_frame_samples = 0;
+               if (rigol_ds_channel_start(sdi) != SR_OK)
+                       return SR_ERR;
        } else {
                if (devc->enabled_analog_probes) {
-                       if (devc->data_source == DATA_SOURCE_MEMORY)
-                       {
-                               if (g_slist_length(devc->enabled_analog_probes) == 1)
-                                       devc->analog_frame_size = DS2000_ANALOG_MEM_WAVEFORM_SIZE_1C;
-                               else
-                                       devc->analog_frame_size = DS2000_ANALOG_MEM_WAVEFORM_SIZE_2C;
+                       if (devc->data_source == DATA_SOURCE_MEMORY) {
                                /* Apparently for the DS2000 the memory
                                 * depth can only be set in Running state -
                                 * this matches the behaviour of the UI. */
-                               if (sr_scpi_send(sdi->conn, ":RUN") != SR_OK)
+                               if (set_cfg(sdi, ":RUN") != SR_OK)
                                        return SR_ERR;
-                               if (sr_scpi_send(sdi->conn, "ACQ:MDEP %d", devc->analog_frame_size) != SR_OK)
+                               if (set_cfg(sdi, "ACQ:MDEP %d", devc->analog_frame_size) != SR_OK)
                                        return SR_ERR;
-                               if (sr_scpi_send(sdi->conn, ":STOP") != SR_OK)
+                               if (set_cfg(sdi, ":STOP") != SR_OK)
                                        return SR_ERR;
-                       } else
-                               devc->analog_frame_size = DS2000_ANALOG_LIVE_WAVEFORM_SIZE;
-                       devc->channel = devc->enabled_analog_probes->data;
+                       }
                        if (rigol_ds_capture_start(sdi) != SR_OK)
                                return SR_ERR;
                }
@@ -885,6 +920,7 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 {
        struct dev_context *devc;
        struct sr_scpi_dev_inst *scpi;
+       struct sr_datafeed_packet packet;
 
        (void)cb_data;
 
@@ -895,6 +931,10 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
                return SR_ERR;
        }
 
+       /* End of last frame. */
+       packet.type = SR_DF_END;
+       sr_session_send(sdi, &packet);
+
        g_slist_free(devc->enabled_analog_probes);
        g_slist_free(devc->enabled_digital_probes);
        devc->enabled_analog_probes = NULL;