]> sigrok.org Git - libsigrok.git/blobdiff - src/hardware/scpi-pps/api.c
output/csv: use intermediate time_t var, silence compiler warning
[libsigrok.git] / src / hardware / scpi-pps / api.c
index e68836b7acf34438e1a26e3e8e6a8dcbda3c5a34..116a5d467c5bde9b182f69f71e5adca181e88e8d 100644 (file)
@@ -2,6 +2,7 @@
  * This file is part of the libsigrok project.
  *
  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
+ * Copyright (C) 2017,2019 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
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include <string.h>
 #include <strings.h>
+#include "scpi.h"
 #include "protocol.h"
 
-SR_PRIV struct sr_dev_driver scpi_pps_driver_info;
-extern unsigned int num_pps_profiles;
-extern const struct scpi_pps pps_profiles[];
+static struct sr_dev_driver scpi_pps_driver_info;
+static struct sr_dev_driver hp_ib_pps_driver_info;
 
 static const uint32_t scanopts[] = {
        SR_CONF_CONN,
@@ -38,14 +40,12 @@ static const struct pps_channel_instance pci[] = {
        { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
        { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
        { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
+       { SR_MQ_FREQUENCY, SCPI_CMD_GET_MEAS_FREQUENCY, "F" },
 };
 
-static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
-{
-       return std_init(sr_ctx, di, LOG_PREFIX);
-}
-
-static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
+static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi,
+               int (*get_hw_id)(struct sr_scpi_dev_inst *scpi,
+               struct sr_scpi_hw_info **scpi_response))
 {
        struct dev_context *devc;
        struct sr_dev_inst *sdi;
@@ -66,15 +66,15 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
        const char *vendor;
        char ch_name[16];
 
-       if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
+       if (get_hw_id(scpi, &hw_info) != SR_OK) {
                sr_info("Couldn't get IDN response.");
                return NULL;
        }
 
        device = NULL;
        for (i = 0; i < num_pps_profiles; i++) {
-               vendor = get_vendor(hw_info->manufacturer);
-               if (strcasecmp(vendor, pps_profiles[i].vendor))
+               vendor = sr_vendor_alias(hw_info->manufacturer);
+               if (g_ascii_strcasecmp(vendor, pps_profiles[i].vendor))
                        continue;
                model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
                if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
@@ -90,7 +90,6 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
        }
 
        sdi = g_malloc0(sizeof(struct sr_dev_inst));
-       sdi->status = SR_ST_INACTIVE;
        sdi->vendor = g_strdup(vendor);
        sdi->model = g_strdup(hw_info->model);
        sdi->version = g_strdup(hw_info->firmware_version);
@@ -101,6 +100,7 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
 
        devc = g_malloc0(sizeof(struct dev_context));
        devc->device = device;
+       sr_sw_limits_init(&devc->limits);
        sdi->priv = devc;
 
        if (device->num_channels) {
@@ -129,7 +129,7 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
        for (ch_num = 0; ch_num < num_channels; ch_num++) {
                /* Create one channel per measurable output unit. */
                for (i = 0; i < ARRAY_SIZE(pci); i++) {
-                       if (!scpi_cmd_get(sdi, pci[i].command))
+                       if (!sr_scpi_cmd_get(devc->device->commands, pci[i].command))
                                continue;
                        g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
                                        channels[ch_num].name);
@@ -145,13 +145,19 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
 
        for (i = 0; i < num_channel_groups; i++) {
                cgs = &channel_groups[i];
-               cg = g_malloc0(sizeof(struct sr_channel_group));
-               cg->name = g_strdup(cgs->name);
+               cg = sr_channel_group_new(sdi, cgs->name, NULL);
                for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
                        if (cgs->channel_index_mask & mask) {
                                for (l = sdi->channels; l; l = l->next) {
                                        ch = l->data;
                                        pch = ch->priv;
+                                       /* Add mqflags from channel_group_spec only to voltage
+                                        * and current channels.
+                                        */
+                                       if (pch->mq == SR_MQ_VOLTAGE || pch->mq == SR_MQ_CURRENT)
+                                               pch->mqflags = cgs->mqflags;
+                                       else
+                                               pch->mqflags = 0;
                                        if (pch->hw_output_idx == j)
                                                cg->channels = g_slist_append(cg->channels, ch);
                                }
@@ -160,31 +166,104 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
                pcg = g_malloc0(sizeof(struct pps_channel_group));
                pcg->features = cgs->features;
                cg->priv = pcg;
-               sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
        }
 
        sr_scpi_hw_info_free(hw_info);
        hw_info = NULL;
 
-       scpi_cmd(sdi, SCPI_CMD_LOCAL);
-       sr_scpi_close(scpi);
+       /* Don't send SCPI_CMD_LOCAL for HP 66xxB using SCPI over GPIB. */
+       if (!(devc->device->dialect == SCPI_DIALECT_HP_66XXB &&
+                       scpi->transport == SCPI_TRANSPORT_LIBGPIB))
+               sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 
        return sdi;
 }
 
-static GSList *scan(struct sr_dev_driver *di, GSList *options)
+static gchar *hpib_get_revision(struct sr_scpi_dev_inst *scpi)
+{
+       int ret;
+       gboolean matches;
+       char *response;
+       GRegex *version_regex;
+
+       ret = sr_scpi_get_string(scpi, "ROM?", &response);
+       if (ret != SR_OK && !response)
+               return NULL;
+
+       /* Example version string: "B01 B01" */
+       version_regex = g_regex_new("[A-Z][0-9]{2} [A-Z][0-9]{2}", 0, 0, NULL);
+       matches = g_regex_match(version_regex, response, 0, NULL);
+       g_regex_unref(version_regex);
+
+       if (!matches) {
+               /* Not a valid version string. Ignore it. */
+               g_free(response);
+               response = NULL;
+       } else {
+               /* Replace space with dot. */
+               response[3] = '.';
+       }
+
+       return response;
+}
+
+/*
+ * This function assumes the response is in the form "HP<model_number>"
+ *
+ * HP made many GPIB (then called HP-IB) instruments before the SCPI command
+ * set was introduced into the standard. We haven't seen any non-HP instruments
+ * which respond to the "ID?" query, so assume all are HP for now.
+ */
+static int hpib_get_hw_id(struct sr_scpi_dev_inst *scpi,
+                         struct sr_scpi_hw_info **scpi_response)
+{
+       int ret;
+       char *response;
+       struct sr_scpi_hw_info *hw_info;
+
+       ret = sr_scpi_get_string(scpi, "ID?", &response);
+       if ((ret != SR_OK) || !response)
+               return SR_ERR;
+
+       hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
+
+       *scpi_response = hw_info;
+       hw_info->model = response;
+       hw_info->firmware_version = hpib_get_revision(scpi);
+       hw_info->manufacturer = g_strdup("HP");
+
+       return SR_OK;
+}
+
+static struct sr_dev_inst *probe_scpi_pps_device(struct sr_scpi_dev_inst *scpi)
 {
-       return sr_scpi_scan(di->priv, options, probe_device);
+       return probe_device(scpi, sr_scpi_get_hw_id);
 }
 
-static GSList *dev_list(const struct sr_dev_driver *di)
+static struct sr_dev_inst *probe_hpib_pps_device(struct sr_scpi_dev_inst *scpi)
 {
-       return ((struct drv_context *)(di->priv))->instances;
+       return probe_device(scpi, hpib_get_hw_id);
 }
 
-static int dev_clear(const struct sr_dev_driver *di)
+static GSList *scan_scpi_pps(struct sr_dev_driver *di, GSList *options)
 {
-       return std_dev_clear(di, NULL);
+       return sr_scpi_scan(di->context, options, probe_scpi_pps_device);
+}
+
+static GSList *scan_hpib_pps(struct sr_dev_driver *di, GSList *options)
+{
+       const char *conn;
+
+       /*
+        * Only scan for HP-IB devices when conn= was specified, to not
+        * break SCPI devices' operation.
+        */
+       conn = NULL;
+       (void)sr_serial_extract_options(options, &conn, NULL);
+       if (!conn)
+               return NULL;
+
+       return sr_scpi_scan(di->context, options, probe_hpib_pps_device);
 }
 
 static int dev_open(struct sr_dev_inst *sdi)
@@ -193,22 +272,24 @@ static int dev_open(struct sr_dev_inst *sdi)
        struct sr_scpi_dev_inst *scpi;
        GVariant *beeper;
 
-       if (sdi->status != SR_ST_INACTIVE)
-               return SR_ERR;
-
        scpi = sdi->conn;
        if (sr_scpi_open(scpi) < 0)
                return SR_ERR;
 
-       sdi->status = SR_ST_ACTIVE;
-
-       scpi_cmd(sdi, SCPI_CMD_REMOTE);
        devc = sdi->priv;
+
+       /* Don't send SCPI_CMD_REMOTE for HP 66xxB using SCPI over GPIB. */
+       if (!(devc->device->dialect == SCPI_DIALECT_HP_66XXB &&
+                       scpi->transport == SCPI_TRANSPORT_LIBGPIB))
+               sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_REMOTE);
+
        devc->beeper_was_set = FALSE;
-       if (scpi_cmd_resp(sdi, &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
+       if (sr_scpi_cmd_resp(sdi, devc->device->commands, 0, NULL,
+                       &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
                if (g_variant_get_boolean(beeper)) {
                        devc->beeper_was_set = TRUE;
-                       scpi_cmd(sdi, SCPI_CMD_BEEPER_DISABLE);
+                       sr_scpi_cmd(sdi, devc->device->commands,
+                               0, NULL, SCPI_CMD_BEEPER_DISABLE);
                }
                g_variant_unref(beeper);
        }
@@ -221,44 +302,47 @@ static int dev_close(struct sr_dev_inst *sdi)
        struct sr_scpi_dev_inst *scpi;
        struct dev_context *devc;
 
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
-
        devc = sdi->priv;
        scpi = sdi->conn;
-       if (scpi) {
-               if (devc->beeper_was_set)
-                       scpi_cmd(sdi, SCPI_CMD_BEEPER_ENABLE);
-               scpi_cmd(sdi, SCPI_CMD_LOCAL);
-               sr_scpi_close(scpi);
-               sdi->status = SR_ST_INACTIVE;
-       }
 
-       return SR_OK;
+       if (!scpi)
+               return SR_ERR_BUG;
+
+       if (devc->beeper_was_set)
+               sr_scpi_cmd(sdi, devc->device->commands,
+                       0, NULL, SCPI_CMD_BEEPER_ENABLE);
+
+       /* Don't send SCPI_CMD_LOCAL for HP 66xxB using SCPI over GPIB. */
+       if (!(devc->device->dialect == SCPI_DIALECT_HP_66XXB &&
+                       scpi->transport == SCPI_TRANSPORT_LIBGPIB))
+               sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
+
+       return sr_scpi_close(scpi);
 }
 
-static void clear_helper(void *priv)
+static void clear_helper(struct dev_context *devc)
 {
-       struct dev_context *devc;
-
-       devc = priv;
        g_free(devc->channels);
        g_free(devc->channel_groups);
-       g_free(devc);
 }
 
-static int cleanup(const struct sr_dev_driver *di)
+static int dev_clear(const struct sr_dev_driver *di)
 {
-       return std_dev_clear(di, clear_helper);
+       return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 }
 
-static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_get(uint32_t key, GVariant **data,
+       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
        struct dev_context *devc;
        const GVariantType *gvtype;
        unsigned int i;
+       int channel_group_cmd;
+       char *channel_group_name;
        int cmd, ret;
+       const char *s;
+       int reg;
+       gboolean is_hmp_sqii;
 
        if (!sdi)
                return SR_ERR_ARG;
@@ -288,32 +372,49 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
        gvtype = NULL;
        cmd = -1;
        switch (key) {
-       case SR_CONF_OUTPUT_ENABLED:
+       case SR_CONF_ENABLED:
                gvtype = G_VARIANT_TYPE_BOOLEAN;
                cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
                break;
-       case SR_CONF_OUTPUT_VOLTAGE:
+       case SR_CONF_VOLTAGE:
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
                break;
-       case SR_CONF_OUTPUT_VOLTAGE_TARGET:
+       case SR_CONF_VOLTAGE_TARGET:
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
                break;
-       case SR_CONF_OUTPUT_CURRENT:
+       case SR_CONF_OUTPUT_FREQUENCY:
+               gvtype = G_VARIANT_TYPE_DOUBLE;
+               cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
+               break;
+       case SR_CONF_OUTPUT_FREQUENCY_TARGET:
+               gvtype = G_VARIANT_TYPE_DOUBLE;
+               cmd = SCPI_CMD_GET_FREQUENCY_TARGET;
+               break;
+       case SR_CONF_CURRENT:
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_MEAS_CURRENT;
                break;
-       case SR_CONF_OUTPUT_CURRENT_LIMIT:
+       case SR_CONF_CURRENT_LIMIT:
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_CURRENT_LIMIT;
                break;
        case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
+               if (devc->device->dialect == SCPI_DIALECT_HMP) {
+                       /* OVP is always enabled. */
+                       *data = g_variant_new_boolean(TRUE);
+                       return 0;
+               }
                gvtype = G_VARIANT_TYPE_BOOLEAN;
                cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
                break;
        case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
-               gvtype = G_VARIANT_TYPE_BOOLEAN;
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB ||
+                       devc->device->dialect == SCPI_DIALECT_HP_COMP)
+                       gvtype = G_VARIANT_TYPE_STRING;
+               else
+                       gvtype = G_VARIANT_TYPE_BOOLEAN;
                cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
                break;
        case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
@@ -325,132 +426,332 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
                cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
                break;
        case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
-               gvtype = G_VARIANT_TYPE_BOOLEAN;
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB ||
+                       devc->device->dialect == SCPI_DIALECT_HP_COMP)
+                       gvtype = G_VARIANT_TYPE_STRING;
+               else
+                       gvtype = G_VARIANT_TYPE_BOOLEAN;
                cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
                break;
        case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
                gvtype = G_VARIANT_TYPE_DOUBLE;
                cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
                break;
+       case SR_CONF_OVER_CURRENT_PROTECTION_DELAY:
+               gvtype = G_VARIANT_TYPE_DOUBLE;
+               cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_DELAY;
+               break;
        case SR_CONF_OVER_TEMPERATURE_PROTECTION:
+               if (devc->device->dialect == SCPI_DIALECT_HMP) {
+                       /* OTP is always enabled. */
+                       *data = g_variant_new_boolean(TRUE);
+                       return 0;
+               }
                gvtype = G_VARIANT_TYPE_BOOLEAN;
                cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
                break;
-       case SR_CONF_OUTPUT_REGULATION:
+       case SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE:
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB ||
+                       devc->device->dialect == SCPI_DIALECT_HP_COMP ||
+                       devc->device->dialect == SCPI_DIALECT_HMP)
+                       gvtype = G_VARIANT_TYPE_STRING;
+               else
+                       gvtype = G_VARIANT_TYPE_BOOLEAN;
+               cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION_ACTIVE;
+               break;
+       case SR_CONF_REGULATION:
                gvtype = G_VARIANT_TYPE_STRING;
                cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
+               break;
+       default:
+               return sr_sw_limits_config_get(&devc->limits, key, data);
+       }
+       if (!gvtype)
+               return SR_ERR_NA;
+
+       channel_group_cmd = 0;
+       channel_group_name = NULL;
+       if (cg) {
+               channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
+               channel_group_name = g_strdup(cg->name);
+       }
+
+       is_hmp_sqii = FALSE;
+       is_hmp_sqii |= cmd == SCPI_CMD_GET_OUTPUT_REGULATION;
+       is_hmp_sqii |= cmd == SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION_ACTIVE;
+       is_hmp_sqii &= devc->device->dialect == SCPI_DIALECT_HMP;
+       if (is_hmp_sqii) {
+               if (!cg) {
+                       /* STAT:QUES:INST:ISUMx query requires channel spec. */
+                       sr_err("Need a channel group for regulation or OTP-active query.");
+                       return SR_ERR_NA;
+               }
+               ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
+                       0, NULL, data, gvtype, cmd, channel_group_name);
+       } else {
+               ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
+                       channel_group_cmd, channel_group_name, data, gvtype, cmd);
+       }
+       g_free(channel_group_name);
+
+       /*
+        * Handle special cases
+        */
+
+       if (cmd == SCPI_CMD_GET_OUTPUT_REGULATION) {
+               if (devc->device->dialect == SCPI_DIALECT_PHILIPS) {
+                       /*
+                       * The Philips PM2800 series returns VOLT/CURR. We always return
+                       * a GVariant string in the Rigol notation (CV/CC/UR).
+                       */
+                       s = g_variant_get_string(*data, NULL);
+                       if (!g_strcmp0(s, "VOLT")) {
+                               g_variant_unref(*data);
+                               *data = g_variant_new_string("CV");
+                       } else if (!g_strcmp0(s, "CURR")) {
+                               g_variant_unref(*data);
+                               *data = g_variant_new_string("CC");
+                       }
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HP_COMP) {
+                       /* Evaluate Status Register from a HP 66xx in COMP mode. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       if (reg & (1 << 0))
+                               *data = g_variant_new_string("CV");
+                       else if (reg & (1 << 1))
+                               *data = g_variant_new_string("CC");
+                       else if (reg & (1 << 2))
+                               *data = g_variant_new_string("UR");
+                       else if (reg & (1 << 9))
+                               *data = g_variant_new_string("CC-");
+                       else
+                               *data = g_variant_new_string("");
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
+                       /* Evaluate Operational Status Register from a HP 66xxB. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       if (reg & (1 << 8))
+                               *data = g_variant_new_string("CV");
+                       else if (reg & (1 << 10))
+                               *data = g_variant_new_string("CC");
+                       else if (reg & (1 << 11))
+                               *data = g_variant_new_string("CC-");
+                       else
+                               *data = g_variant_new_string("UR");
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HMP) {
+                       /* Evaluate Condition Status Register from a HMP series device. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       if (reg & (1 << 0))
+                               *data = g_variant_new_string("CC");
+                       else if (reg & (1 << 1))
+                               *data = g_variant_new_string("CV");
+                       else
+                               *data = g_variant_new_string("UR");
+               }
+
+               s = g_variant_get_string(*data, NULL);
+               if (g_strcmp0(s, "CV") && g_strcmp0(s, "CC") && g_strcmp0(s, "CC-") &&
+                       g_strcmp0(s, "UR") && g_strcmp0(s, "")) {
+
+                       sr_err("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
+                       ret = SR_ERR_DATA;
+               }
+       }
+
+       if (cmd == SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE) {
+               if (devc->device->dialect == SCPI_DIALECT_HP_COMP) {
+                       /* Evaluate Status Register from a HP 66xx in COMP mode. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 3));
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
+                       /* Evaluate Questionable Status Register bit 0 from a HP 66xxB. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 0));
+               }
+       }
+
+       if (cmd == SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE) {
+               if (devc->device->dialect == SCPI_DIALECT_HP_COMP) {
+                       /* Evaluate Status Register from a HP 66xx in COMP mode. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 6));
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
+                       /* Evaluate Questionable Status Register bit 1 from a HP 66xxB. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 1));
+               }
+       }
+
+       if (cmd == SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION_ACTIVE) {
+               if (devc->device->dialect == SCPI_DIALECT_HP_COMP) {
+                       /* Evaluate Status Register from a HP 66xx in COMP mode. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 4));
+               }
+               if (devc->device->dialect == SCPI_DIALECT_HP_66XXB ||
+                   devc->device->dialect == SCPI_DIALECT_HMP) {
+                       /* Evaluate Questionable Status Register bit 4 from a HP 66xxB. */
+                       s = g_variant_get_string(*data, NULL);
+                       sr_atoi(s, &reg);
+                       g_variant_unref(*data);
+                       *data = g_variant_new_boolean(reg & (1 << 4));
+               }
        }
-       if (gvtype) {
-               if (cg)
-                       select_channel(sdi, cg->channels->data);
-               ret = scpi_cmd_resp(sdi, data, gvtype, cmd);
-       } else
-               ret = SR_ERR_NA;
 
        return ret;
 }
 
-static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_set(uint32_t key, GVariant *data,
+       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
+       struct dev_context *devc;
        double d;
+       int channel_group_cmd;
+       char *channel_group_name;
        int ret;
 
        if (!sdi)
                return SR_ERR_ARG;
 
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
+       channel_group_cmd = 0;
+       channel_group_name = NULL;
+       if (cg) {
+               channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
+               channel_group_name = g_strdup(cg->name);
+       }
 
-       if (cg)
-               /* Channel group specified. */
-               select_channel(sdi, cg->channels->data);
+       devc = sdi->priv;
 
-       ret = SR_OK;
        switch (key) {
-       case SR_CONF_OUTPUT_ENABLED:
+       case SR_CONF_ENABLED:
                if (g_variant_get_boolean(data))
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_ENABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OUTPUT_ENABLE);
                else
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OUTPUT_DISABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OUTPUT_DISABLE);
                break;
-       case SR_CONF_OUTPUT_VOLTAGE_TARGET:
+       case SR_CONF_VOLTAGE_TARGET:
                d = g_variant_get_double(data);
-               ret = scpi_cmd(sdi, SCPI_CMD_SET_VOLTAGE_TARGET, d);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_VOLTAGE_TARGET, d);
                break;
-       case SR_CONF_OUTPUT_CURRENT_LIMIT:
+       case SR_CONF_OUTPUT_FREQUENCY_TARGET:
                d = g_variant_get_double(data);
-               ret = scpi_cmd(sdi, SCPI_CMD_SET_CURRENT_LIMIT, d);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_FREQUENCY_TARGET, d);
+               break;
+       case SR_CONF_CURRENT_LIMIT:
+               d = g_variant_get_double(data);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_CURRENT_LIMIT, d);
                break;
        case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
                if (g_variant_get_boolean(data))
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
                else
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
                break;
        case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
                d = g_variant_get_double(data);
-               ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
                break;
        case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
                if (g_variant_get_boolean(data))
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
                else
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
                break;
        case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
                d = g_variant_get_double(data);
-               ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
+               break;
+       case SR_CONF_OVER_CURRENT_PROTECTION_DELAY:
+               d = g_variant_get_double(data);
+               ret = sr_scpi_cmd(sdi, devc->device->commands,
+                               channel_group_cmd, channel_group_name,
+                               SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DELAY, d);
                break;
        case SR_CONF_OVER_TEMPERATURE_PROTECTION:
                if (g_variant_get_boolean(data))
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
                else
-                       ret = scpi_cmd(sdi, SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
+                       ret = sr_scpi_cmd(sdi, devc->device->commands,
+                                       channel_group_cmd, channel_group_name,
+                                       SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
                break;
        default:
-               ret = SR_ERR_NA;
+               ret = sr_sw_limits_config_set(&devc->limits, key, data);
        }
 
+       g_free(channel_group_name);
+
        return ret;
 }
 
-static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_list(uint32_t key, GVariant **data,
+       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 {
        struct dev_context *devc;
        struct sr_channel *ch;
+       struct pps_channel *pch;
        const struct channel_spec *ch_spec;
-       GVariant *gvar;
-       GVariantBuilder gvb;
-       int ret, i;
+       int i;
        const char *s[16];
 
-       /* Always available, even without sdi. */
-       if (key == SR_CONF_SCAN_OPTIONS) {
-               *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
-                               scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
-               return SR_OK;
-       } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
-               *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
-                               drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
-               return SR_OK;
-       }
+       devc = (sdi) ? sdi->priv : NULL;
 
-       if (!sdi)
-               return SR_ERR_ARG;
-       devc = sdi->priv;
-
-       ret = SR_OK;
        if (!cg) {
-               /* No channel group: global options. */
                switch (key) {
+               case SR_CONF_SCAN_OPTIONS:
                case SR_CONF_DEVICE_OPTIONS:
-                       *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
-                                       devc->device->devopts, devc->device->num_devopts,
-                                       sizeof(uint32_t));
+                       return std_opts_config_list(key, data, sdi, cg,
+                               ARRAY_AND_SIZE(scanopts),
+                               ARRAY_AND_SIZE(drvopts),
+                               (devc && devc->device) ? devc->device->devopts : NULL,
+                               (devc && devc->device) ? devc->device->num_devopts : 0);
                        break;
-               case SR_CONF_OUTPUT_CHANNEL_CONFIG:
+               case SR_CONF_CHANNEL_CONFIG:
+                       if (!devc || !devc->device)
+                               return SR_ERR_ARG;
                        /* Not used. */
                        i = 0;
                        if (devc->device->features & PPS_INDEPENDENT)
@@ -472,7 +773,6 @@ static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *
                        return SR_ERR_NA;
                }
        } else {
-               /* Channel group specified. */
                /*
                 * Per-channel-group options depending on a channel are actually
                 * done with the first channel. Channel groups in PPS can have
@@ -480,115 +780,106 @@ static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *
                 * specification for use in series or parallel mode.
                 */
                ch = cg->channels->data;
+               pch = ch->priv;
+               if (!devc || !devc->device)
+                       return SR_ERR_ARG;
+               ch_spec = &(devc->device->channels[pch->hw_output_idx]);
 
                switch (key) {
                case SR_CONF_DEVICE_OPTIONS:
-                       *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
-                                       devc->device->devopts_cg, devc->device->num_devopts_cg,
-                                       sizeof(uint32_t));
+                       *data = std_gvar_array_u32(devc->device->devopts_cg, devc->device->num_devopts_cg);
                        break;
-               case SR_CONF_OUTPUT_VOLTAGE_TARGET:
-                       ch_spec = &(devc->device->channels[ch->index]);
-                       g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
-                       /* Min, max, write resolution. */
-                       for (i = 0; i < 3; i++) {
-                               gvar = g_variant_new_double(ch_spec->voltage[i]);
-                               g_variant_builder_add_value(&gvb, gvar);
-                       }
-                       *data = g_variant_builder_end(&gvb);
+               case SR_CONF_VOLTAGE_TARGET:
+                       *data = std_gvar_min_max_step_array(ch_spec->voltage);
                        break;
-               case SR_CONF_OUTPUT_CURRENT_LIMIT:
-                       g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
-                       /* Min, max, step. */
-                       for (i = 0; i < 3; i++) {
-                               ch_spec = &(devc->device->channels[ch->index]);
-                               gvar = g_variant_new_double(ch_spec->current[i]);
-                               g_variant_builder_add_value(&gvb, gvar);
-                       }
-                       *data = g_variant_builder_end(&gvb);
+               case SR_CONF_OUTPUT_FREQUENCY_TARGET:
+                       *data = std_gvar_min_max_step_array(ch_spec->frequency);
+                       break;
+               case SR_CONF_CURRENT_LIMIT:
+                       *data = std_gvar_min_max_step_array(ch_spec->current);
+                       break;
+               case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
+                       *data = std_gvar_min_max_step_array(ch_spec->ovp);
+                       break;
+               case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
+                       *data = std_gvar_min_max_step_array(ch_spec->ocp);
+                       break;
+               case SR_CONF_OVER_CURRENT_PROTECTION_DELAY:
+                       *data = std_gvar_min_max_step_array(ch_spec->ocp_delay);
                        break;
                default:
                        return SR_ERR_NA;
                }
        }
 
-       return ret;
+       return SR_OK;
 }
 
-static int dev_acquisition_start(const struct sr_dev_inst *sdi,
-               void *cb_data)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 {
        struct dev_context *devc;
        struct sr_scpi_dev_inst *scpi;
-       struct sr_channel *ch;
-       struct pps_channel *pch;
-       int cmd, ret;
-
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
+       int ret;
 
        devc = sdi->priv;
        scpi = sdi->conn;
-       devc->cb_data = cb_data;
+
+       /* Prime the pipe with the first channel. */
+       devc->cur_acquisition_channel = sr_next_enabled_channel(sdi, NULL);
+
+       /* Device specific initialization before acquisition starts. */
+       if (devc->device->init_acquisition)
+               devc->device->init_acquisition(sdi);
 
        if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
                        scpi_pps_receive_data, (void *)sdi)) != SR_OK)
                return ret;
-       std_session_send_df_header(sdi, LOG_PREFIX);
-
-       /* Prime the pipe with the first channel's fetch. */
-       ch = next_enabled_channel(sdi, NULL);
-       pch = ch->priv;
-       if ((ret = select_channel(sdi, ch)) != SR_OK)
-               return ret;
-       if (pch->mq == SR_MQ_VOLTAGE)
-               cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
-       else if (pch->mq == SR_MQ_CURRENT)
-               cmd = SCPI_CMD_GET_MEAS_CURRENT;
-       else if (pch->mq == SR_MQ_POWER)
-               cmd = SCPI_CMD_GET_MEAS_POWER;
-       else
-               return SR_ERR;
-       scpi_cmd(sdi, cmd, pch->hwname);
+       std_session_send_df_header(sdi);
+       sr_sw_limits_acquisition_start(&devc->limits);
 
        return SR_OK;
 }
 
-static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 {
-       struct sr_datafeed_packet packet;
        struct sr_scpi_dev_inst *scpi;
-       float f;
-
-       (void)cb_data;
-
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
 
        scpi = sdi->conn;
 
-       /*
-        * A requested value is certainly on the way. Retrieve it now,
-        * to avoid leaving the device in a state where it's not expecting
-        * commands.
-        */
-       sr_scpi_get_float(scpi, NULL, &f);
        sr_scpi_source_remove(sdi->session, scpi);
 
-       packet.type = SR_DF_END;
-       sr_session_send(sdi, &packet);
+       std_session_send_df_end(sdi);
 
        return SR_OK;
 }
 
-SR_PRIV struct sr_dev_driver scpi_pps_driver_info = {
+static struct sr_dev_driver scpi_pps_driver_info = {
        .name = "scpi-pps",
        .longname = "SCPI PPS",
        .api_version = 1,
-       .init = init,
-       .cleanup = cleanup,
-       .scan = scan,
-       .dev_list = dev_list,
+       .init = std_init,
+       .cleanup = std_cleanup,
+       .scan = scan_scpi_pps,
+       .dev_list = std_dev_list,
+       .dev_clear = dev_clear,
+       .config_get = config_get,
+       .config_set = config_set,
+       .config_list = config_list,
+       .dev_open = dev_open,
+       .dev_close = dev_close,
+       .dev_acquisition_start = dev_acquisition_start,
+       .dev_acquisition_stop = dev_acquisition_stop,
+       .context = NULL,
+};
+
+static struct sr_dev_driver hp_ib_pps_driver_info = {
+       .name = "hpib-pps",
+       .longname = "HP-IB PPS",
+       .api_version = 1,
+       .init = std_init,
+       .cleanup = std_cleanup,
+       .scan = scan_hpib_pps,
+       .dev_list = std_dev_list,
        .dev_clear = dev_clear,
        .config_get = config_get,
        .config_set = config_set,
@@ -597,5 +888,7 @@ SR_PRIV struct sr_dev_driver scpi_pps_driver_info = {
        .dev_close = dev_close,
        .dev_acquisition_start = dev_acquisition_start,
        .dev_acquisition_stop = dev_acquisition_stop,
-       .priv = NULL,
+       .context = NULL,
 };
+SR_REGISTER_DEV_DRIVER(scpi_pps_driver_info);
+SR_REGISTER_DEV_DRIVER(hp_ib_pps_driver_info);