+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+#include "config.h"
+#include "agilent-dmm.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+
+static const int hwopts[] = {
+ SR_HWOPT_CONN,
+ SR_HWOPT_SERIALCOMM,
+ 0,
+};
+
+static const int hwcaps[] = {
+ SR_HWCAP_MULTIMETER,
+ SR_HWCAP_LIMIT_SAMPLES,
+ SR_HWCAP_LIMIT_MSEC,
+ SR_HWCAP_CONTINUOUS,
+ 0,
+};
+
+static const char *probe_names[] = {
+ "Probe",
+ NULL,
+};
+
+extern const struct agdmm_job u123x_jobs[];
+extern const struct agdmm_recv u123x_recvs[];
+
+static const struct agdmm_profile supported_agdmm[] = {
+ { AGILENT_U1232A, "U1232A", 9600, u123x_jobs, u123x_recvs },
+ { 0, NULL, 0, NULL, NULL }
+};
+
+SR_PRIV struct sr_dev_driver agdmm_driver_info;
+static struct sr_dev_driver *di = &agdmm_driver_info;
+
+/* Properly close and free all devices. */
+static int clear_instances(void)
+{
+ struct sr_dev_inst *sdi;
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ GSList *l;
+
+ if (!(drvc = di->priv))
+ return SR_OK;
+
+ drvc = di->priv;
+ for (l = drvc->instances; l; l = l->next) {
+ if (!(sdi = l->data))
+ continue;
+ if (!(devc = sdi->priv))
+ continue;
+ sr_serial_dev_inst_free(devc->serial);
+ sr_dev_inst_free(sdi);
+ }
+ g_slist_free(drvc->instances);
+ drvc->instances = NULL;
+
+ return SR_OK;
+}
+
+static int hw_init(void)
+{
+ struct drv_context *drvc;
+
+ if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
+ sr_err("agilent-dmm: driver context malloc failed.");
+ return SR_ERR;
+ }
+
+ di->priv = drvc;
+
+ return SR_OK;
+}
+
+static int serial_readline(int fd, char **buf, int *buflen, uint64_t timeout_ms)
+{
+ uint64_t start;
+ int maxlen, len;
+
+ timeout_ms *= 1000;
+ start = g_get_monotonic_time();
+
+ maxlen = *buflen;
+ *buflen = len = 0;
+ while(1) {
+ len = maxlen - *buflen - 1;
+ if (len < 1)
+ break;
+ len = serial_read(fd, *buf + *buflen, len);
+ if (len > 0) {
+ *buflen += len;
+ *(*buf + *buflen) = '\0';
+ if (*buflen > 0 && *(*buf + *buflen - 1) == '\n')
+ /* End of line */
+ break;
+ }
+ if (g_get_monotonic_time() - start > timeout_ms)
+ /* Timeout */
+ break;
+ g_usleep(2000);
+ }
+
+ /* Strip CRLF */
+ while (*buflen) {
+ if (*(*buf + *buflen - 1) == '\r' || *(*buf + *buflen - 1) == '\n')
+ *(*buf + --*buflen) = '\0';
+ else
+ break;
+ }
+ if (*buflen)
+ sr_dbg("agilent-dmm: received '%s'", *buf);
+
+ return SR_OK;
+}
+
+static GSList *hw_scan(GSList *options)
+{
+ struct sr_dev_inst *sdi;
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ struct sr_hwopt *opt;
+ struct sr_probe *probe;
+ GSList *l, *devices;
+ int len, fd, i;
+ const char *conn, *serialcomm;
+ char *buf, **tokens;
+
+ drvc = di->priv;
+ drvc->instances = NULL;
+
+ devices = NULL;
+ conn = serialcomm = NULL;
+ for (l = options; l; l = l->next) {
+ opt = l->data;
+ switch (opt->hwopt) {
+ case SR_HWOPT_CONN:
+ conn = opt->value;
+ break;
+ case SR_HWOPT_SERIALCOMM:
+ serialcomm = opt->value;
+ break;
+ }
+ }
+ if (!conn) {
+ sr_dbg("no serial port provided");
+ return NULL;
+ }
+ if (!serialcomm) {
+ sr_dbg("no serial communication parameters provided");
+ return NULL;
+ }
+
+ if ((fd = serial_open(conn, O_RDWR|O_NONBLOCK)) == -1) {
+ sr_err("agilent-dmm: unable to open %s: %s", conn, strerror(errno));
+ return NULL;
+ }
+
+ if (serial_set_paramstr(fd, serialcomm) != SR_OK) {
+ sr_err("agilent-dmm: unable to set serial parameters: %s",
+ strerror(errno));
+ return NULL;
+ }
+
+ serial_flush(fd);
+ if (serial_write(fd, "*IDN?\r\n", 7) == -1) {
+ sr_err("agilent-dmm: unable to send identification string: %s",
+ strerror(errno));
+ return NULL;
+ }
+
+ len = 128;
+ buf = g_try_malloc(len);
+ serial_readline(fd, &buf, &len, 150);
+ if (!len)
+ return NULL;
+
+ tokens = g_strsplit(buf, ",", 4);
+ if (!strcmp("Agilent Technologies", tokens[0])
+ && tokens[2] && tokens[3]) {
+ for (i = 0; supported_agdmm[i].model; i++) {
+ if (strcmp(supported_agdmm[i].modelname, tokens[1]))
+ continue;
+ if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, tokens[0],
+ tokens[1], tokens[3])))
+ return NULL;
+ if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+ sr_dbg("agilent-dmm: failed to malloc devc");
+ return NULL;
+ }
+ devc->profile = &supported_agdmm[i];
+ devc->serial = sr_serial_dev_inst_new(conn, -1);
+ devc->cur_mq = -1;
+ sdi->priv = devc;
+ sdi->driver = di;
+ if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
+ return NULL;
+ sdi->probes = g_slist_append(sdi->probes, probe);
+ drvc->instances = g_slist_append(drvc->instances, sdi);
+ devices = g_slist_append(devices, sdi);
+ break;
+ }
+ }
+ g_strfreev(tokens);
+ g_free(buf);
+
+ serial_close(fd);
+
+ return devices;
+}
+
+static GSList *hw_dev_list(void)
+{
+ struct drv_context *drvc;
+
+ drvc = di->priv;
+
+ return drvc->instances;
+}
+
+static int hw_dev_open(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+
+ if (!(devc = sdi->priv)) {
+ sr_err("agilent-dmm: sdi->priv was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ devc->serial->fd = serial_open(devc->serial->port, O_RDWR | O_NONBLOCK);
+ if (devc->serial->fd == -1) {
+ sr_err("agilent-dmm: Couldn't open serial port '%s'.",
+ devc->serial->port);
+ return SR_ERR;
+ }
+ serial_set_params(devc->serial->fd, devc->profile->serial_speed, 8,
+ SERIAL_PARITY_NONE, 1, 0);
+ sdi->status = SR_ST_ACTIVE;
+
+ return SR_OK;
+}
+
+static int hw_dev_close(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+
+ if (!(devc = sdi->priv)) {
+ sr_err("agilent-dmm: sdi->priv was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ if (devc->serial && devc->serial->fd != -1) {
+ serial_close(devc->serial->fd);
+ devc->serial->fd = -1;
+ sdi->status = SR_ST_INACTIVE;
+ }
+
+ return SR_OK;
+}
+
+static int hw_cleanup(void)
+{
+
+ clear_instances();
+
+ return SR_OK;
+}
+
+static int hw_info_get(int info_id, const void **data,
+ const struct sr_dev_inst *sdi)
+{
+
+ (void)sdi;
+
+ switch (info_id) {
+ case SR_DI_HWOPTS:
+ *data = hwopts;
+ break;
+ case SR_DI_HWCAPS:
+ *data = hwcaps;
+ break;
+ case SR_DI_NUM_PROBES:
+ *data = GINT_TO_POINTER(1);
+ break;
+ case SR_DI_PROBE_NAMES:
+ *data = probe_names;
+ break;
+ default:
+ return SR_ERR_ARG;
+ }
+
+ return SR_OK;
+}
+
+static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
+ const void *value)
+{
+ struct dev_context *devc;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR;
+
+ if (!(devc = sdi->priv)) {
+ sr_err("agilent-dmm: sdi->priv was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ switch (hwcap) {
+ case SR_HWCAP_LIMIT_MSEC:
+ /* TODO: not yet implemented */
+ if (*(const uint64_t *)value == 0) {
+ sr_err("agilent-dmm: LIMIT_MSEC can't be 0.");
+ return SR_ERR;
+ }
+ devc->limit_msec = *(const uint64_t *)value;
+ sr_dbg("agilent-dmm: Setting time limit to %" PRIu64 "ms.",
+ devc->limit_msec);
+ break;
+ case SR_HWCAP_LIMIT_SAMPLES:
+ devc->limit_samples = *(const uint64_t *)value;
+ sr_dbg("agilent-dmm: Setting sample limit to %" PRIu64 ".",
+ devc->limit_samples);
+ break;
+ default:
+ sr_err("agilent-dmm: Unknown capability: %d.", hwcap);
+ return SR_ERR;
+ break;
+ }
+
+ return SR_OK;
+}
+
+static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
+ void *cb_data)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_header header;
+ struct sr_datafeed_meta_analog meta;
+ struct dev_context *devc;
+
+ if (!(devc = sdi->priv)) {
+ sr_err("agilent-dmm: sdi->priv was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ sr_dbg("agilent-dmm: Starting acquisition.");
+
+ devc->cb_data = cb_data;
+
+ /* Send header packet to the session bus. */
+ sr_dbg("agilent-dmm: Sending SR_DF_HEADER.");
+ packet.type = SR_DF_HEADER;
+ packet.payload = (uint8_t *)&header;
+ header.feed_version = 1;
+ gettimeofday(&header.starttime, NULL);
+ sr_session_send(devc->cb_data, &packet);
+
+ /* Send metadata about the SR_DF_ANALOG packets to come. */
+ sr_dbg("agilent-dmm: Sending SR_DF_META_ANALOG.");
+ packet.type = SR_DF_META_ANALOG;
+ packet.payload = &meta;
+ meta.num_probes = 1;
+ sr_session_send(devc->cb_data, &packet);
+
+ /* Poll every 100ms, or whenever some data comes in. */
+ sr_source_add(devc->serial->fd, G_IO_IN, 100, agdmm_receive_data, (void *)sdi);
+
+ return SR_OK;
+}
+
+static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
+ void *cb_data)
+{
+ struct sr_datafeed_packet packet;
+ struct dev_context *devc;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR;
+
+ if (!(devc = sdi->priv)) {
+ sr_err("agilent-dmm: sdi->priv was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ sr_dbg("agilent-dmm: Stopping acquisition.");
+
+ sr_source_remove(devc->serial->fd);
+ hw_dev_close((struct sr_dev_inst *)sdi);
+
+ /* Send end packet to the session bus. */
+ sr_dbg("agilent-dmm: Sending SR_DF_END.");
+ packet.type = SR_DF_END;
+ sr_session_send(cb_data, &packet);
+
+
+ return SR_OK;
+}
+
+SR_PRIV struct sr_dev_driver agdmm_driver_info = {
+ .name = "agilent-dmm",
+ .longname = "Agilent U12xx series DMMs",
+ .api_version = 1,
+ .init = hw_init,
+ .cleanup = hw_cleanup,
+ .scan = hw_scan,
+ .dev_list = hw_dev_list,
+ .dev_clear = clear_instances,
+ .dev_open = hw_dev_open,
+ .dev_close = hw_dev_close,
+ .info_get = hw_info_get,
+ .dev_config_set = hw_dev_config_set,
+ .dev_acquisition_start = hw_dev_acquisition_start,
+ .dev_acquisition_stop = hw_dev_acquisition_stop,
+ .priv = NULL,
+};
projects / libsigrok.git / blobdiff