* This file is part of the libsigrok project.
*
* Copyright (C) 2014 Janne Huttunen <jahuttun@gmail.com>
+ * Copyright (C) 2019 Gerhard Sittig <gerhard.sittig@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
*/
#include <config.h>
-#include <stdint.h>
-#include <string.h>
-#include <math.h>
#include <glib.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
+#include <math.h>
+#include "protocol.h"
+#include <stdint.h>
+#include <string.h>
-#define LOG_PREFIX "serial-lcr-es51919"
+static const uint32_t scanopts[] = {
+ SR_CONF_CONN,
+ SR_CONF_SERIALCOMM,
+};
+
+static const uint32_t drvopts[] = {
+ SR_CONF_LCRMETER,
+};
-struct lcr_es51919_info {
- struct sr_dev_driver di;
- const char *vendor;
- const char *model;
+static const uint32_t devopts[] = {
+ SR_CONF_CONTINUOUS,
+ SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
+ SR_CONF_LIMIT_MSEC | SR_CONF_SET,
+ SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_LIST,
+ SR_CONF_EQUIV_CIRCUIT_MODEL | SR_CONF_GET | SR_CONF_LIST,
};
-static int dev_clear(const struct sr_dev_driver *di)
+static struct sr_dev_inst *scan_packet_check_devinst;
+
+static void scan_packet_check_setup(struct sr_dev_inst *sdi)
+{
+ scan_packet_check_devinst = sdi;
+}
+
+static gboolean scan_packet_check_func(const uint8_t *buf)
{
- return std_dev_clear_with_callback(di, es51919_serial_clean);
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ const struct lcr_info *lcr;
+ struct lcr_parse_info *info;
+
+ /* Get a reference to the LCR model that is getting checked. */
+ sdi = scan_packet_check_devinst;
+ if (!sdi)
+ return FALSE;
+ devc = sdi->priv;
+ if (!devc)
+ return FALSE;
+ lcr = devc->lcr_info;
+ if (!lcr)
+ return FALSE;
+
+ /* Synchronize to the stream of LCR packets. */
+ if (!lcr->packet_valid(buf))
+ return FALSE;
+
+ /* Have LCR packets _processed_, gather current configuration. */
+ info = &devc->parse_info;
+ memset(info, 0, sizeof(*info));
+ if (lcr->packet_parse(buf, NULL, NULL, info) == SR_OK) {
+ devc->output_freq = info->output_freq;
+ if (info->circuit_model)
+ devc->circuit_model = info->circuit_model;
+ }
+
+ return TRUE;
}
static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
- struct lcr_es51919_info *lcr;
+ struct lcr_info *lcr;
+ struct sr_config *src;
+ GSList *l, *devices;
+ const char *conn, *serialcomm;
+ struct sr_serial_dev_inst *serial;
+ uint8_t buf[128];
+ size_t len, dropped;
+ int ret;
struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ size_t ch_idx;
+ char ch_name[8];
- lcr = (struct lcr_es51919_info *)di;
+ lcr = (struct lcr_info *)di;
- if (!(sdi = es51919_serial_scan(options, lcr->vendor, lcr->model)))
+ /* Get serial port name and communication parameters. */
+ conn = NULL;
+ serialcomm = lcr->comm;
+ for (l = options; l; l = l->next) {
+ src = l->data;
+ switch (src->key) {
+ case SR_CONF_CONN:
+ conn = g_variant_get_string(src->data, NULL);
+ break;
+ case SR_CONF_SERIALCOMM:
+ serialcomm = g_variant_get_string(src->data, NULL);
+ break;
+ }
+ }
+ if (!conn)
return NULL;
- return std_scan_complete(di, g_slist_append(NULL, sdi));
+ /* Open the serial port. */
+ serial = sr_serial_dev_inst_new(conn, serialcomm);
+ if (serial_open(serial, SERIAL_RDWR) != SR_OK)
+ return NULL;
+ sr_info("Probing serial port %s.", conn);
+
+ /*
+ * See if we can detect a device of specified type.
+ *
+ * No supported device provides a means to "identify" yet. No
+ * supported device requires "packet request" yet. They all just
+ * send data periodically. So we check if the packets match the
+ * probed device's expected format.
+ */
+ serial_flush(serial);
+ devices = NULL;
+ len = sizeof(buf);
+ ret = serial_stream_detect(serial, buf, &len,
+ lcr->packet_size, lcr->packet_valid, 3000);
+ if (ret != SR_OK)
+ goto scan_cleanup;
+
+ /*
+ * If the packets were found to match after more than two packets
+ * got dropped, something is wrong. This is worth warning about,
+ * but isn't fatal. The dropped bytes might be due to nonstandard
+ * cables that ship with some devices.
+ */
+ dropped = len - lcr->packet_size;
+ if (dropped > 2 * lcr->packet_size)
+ sr_warn("Had to drop unexpected amounts of data.");
+
+ /* Create a device instance for the found device. */
+ sr_info("Found %s %s device on port %s.", lcr->vendor, lcr->model, conn);
+ sdi = g_malloc0(sizeof(*sdi));
+ sdi->status = SR_ST_INACTIVE;
+ sdi->vendor = g_strdup(lcr->vendor);
+ sdi->model = g_strdup(lcr->model);
+ sdi->inst_type = SR_INST_SERIAL;
+ sdi->conn = serial;
+ devc = g_malloc0(sizeof(*devc));
+ sdi->priv = devc;
+ devc->lcr_info = lcr;
+ sr_sw_limits_init(&devc->limits);
+ for (ch_idx = 0; ch_idx < lcr->channel_count; ch_idx++) {
+ snprintf(ch_name, sizeof(ch_name), "P%zu", ch_idx + 1);
+ sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, ch_name);
+ }
+ devices = g_slist_append(devices, sdi);
+
+ /*
+ * Receive a few more packets (and process them!) to have the
+ * current output frequency and circuit model parameter values
+ * detected. The above "stream detect" phase only synchronized
+ * to the packets by checking their validity, but it cannot
+ * provide details. This phase here runs a modified "checker"
+ * routine which also extracts details from LCR packets after
+ * the device got detected and parameter storage was prepared.
+ */
+ sr_info("Retrieving current acquisition parameters.");
+ len = sizeof(buf);
+ scan_packet_check_setup(sdi);
+ ret = serial_stream_detect(serial, buf, &len,
+ lcr->packet_size, scan_packet_check_func, 1000);
+ scan_packet_check_setup(NULL);
+
+scan_cleanup:
+ serial_close(serial);
+
+ return std_scan_complete(di, devices);
+}
+
+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 struct lcr_info *lcr;
+
+ if (!sdi)
+ return SR_ERR_ARG;
+ devc = sdi->priv;
+
+ switch (key) {
+ case SR_CONF_LIMIT_FRAMES:
+ case SR_CONF_LIMIT_MSEC:
+ return sr_sw_limits_config_get(&devc->limits, key, data);
+ case SR_CONF_OUTPUT_FREQUENCY:
+ *data = g_variant_new_double(devc->output_freq);
+ return SR_OK;
+ case SR_CONF_EQUIV_CIRCUIT_MODEL:
+ if (!devc->circuit_model)
+ return SR_ERR_NA;
+ *data = g_variant_new_string(devc->circuit_model);
+ return SR_OK;
+ default:
+ lcr = devc->lcr_info;
+ if (!lcr)
+ return SR_ERR_NA;
+ if (!lcr->config_get)
+ return SR_ERR_NA;
+ return lcr->config_get(key, data, sdi, cg);
+ }
+ /* UNREACH */
+}
+
+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;
+ const struct lcr_info *lcr;
+
+ if (!sdi)
+ return SR_ERR_ARG;
+ devc = sdi->priv;
+
+ switch (key) {
+ case SR_CONF_LIMIT_FRAMES:
+ case SR_CONF_LIMIT_MSEC:
+ return sr_sw_limits_config_set(&devc->limits, key, data);
+ default:
+ lcr = devc->lcr_info;
+ if (!lcr)
+ return SR_ERR_NA;
+ if (!lcr->config_set)
+ return SR_ERR_NA;
+ return lcr->config_set(key, data, sdi, cg);
+ }
+ /* UNREACH */
+}
+
+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;
+ const struct lcr_info *lcr;
+
+ switch (key) {
+ case SR_CONF_SCAN_OPTIONS:
+ case SR_CONF_DEVICE_OPTIONS:
+ return STD_CONFIG_LIST(key, data, sdi, cg,
+ scanopts, drvopts, devopts);
+ default:
+ break;
+ }
+
+ if (!sdi)
+ return SR_ERR_ARG;
+ devc = sdi->priv;
+ switch (key) {
+ default:
+ lcr = devc->lcr_info;
+ if (!lcr || !lcr->config_list)
+ return SR_ERR_NA;
+ return lcr->config_list(key, data, sdi, cg);
+ }
+ /* UNREACH */
+}
+
+static int dev_acquisition_start(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+
+ devc = sdi->priv;
+
+ /*
+ * Clear values that were gathered during scan or in a previous
+ * acquisition, so that this acquisition's data feed immediately
+ * starts with meta packets before first measurement values, and
+ * also communicates subsequent parameter changes.
+ */
+ devc->output_freq = 0;
+ devc->circuit_model = NULL;
+
+ sr_sw_limits_acquisition_start(&devc->limits);
+ std_session_send_df_header(sdi);
+
+ serial = sdi->conn;
+ serial_source_add(sdi->session, serial, G_IO_IN, 50,
+ lcr_receive_data, (void *)sdi);
+
+ return SR_OK;
}
#define LCR_ES51919(id, vendor, model) \
- &((struct lcr_es51919_info) { \
+ &((struct lcr_info) { \
{ \
.name = id, \
.longname = vendor " " model, \
.cleanup = std_cleanup, \
.scan = scan, \
.dev_list = std_dev_list, \
- .dev_clear = dev_clear, \
- .config_get = es51919_serial_config_get, \
- .config_set = es51919_serial_config_set, \
- .config_list = es51919_serial_config_list, \
+ .dev_clear = std_dev_clear, \
+ .config_get = config_get, \
+ .config_set = config_set, \
+ .config_list = config_list, \
.dev_open = std_serial_dev_open, \
.dev_close = std_serial_dev_close, \
- .dev_acquisition_start = es51919_serial_acquisition_start, \
+ .dev_acquisition_start = dev_acquisition_start, \
.dev_acquisition_stop = std_serial_dev_acquisition_stop, \
.context = NULL, \
}, \
- vendor, model, \
+ vendor, model, ES51919_CHANNEL_COUNT, \
+ ES51919_COMM_PARAM, ES51919_PACKET_SIZE, \
+ es51919_packet_valid, es51919_packet_parse, \
+ NULL, NULL, es51919_config_list, \
}).di
SR_REGISTER_DEV_DRIVER_LIST(lcr_es51919_drivers,
projects / libsigrok.git / blobdiff