X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fagilent-dmm%2Fapi.c;h=a2aab654f9d984c06c5af4c0246d7d82136a63f1;hb=e93cdf428c6383b9868d08bdae07ff775bedd0c0;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=792fc686581a9412364d06be2e05dfe4d4014ed1;p=libsigrok.git

diff --git a/hardware/agilent-dmm/api.c b/hardware/agilent-dmm/api.c
index e69de29b..a2aab654 100644
--- a/hardware/agilent-dmm/api.c
+++ b/hardware/agilent-dmm/api.c
@@ -0,0 +1,440 @@
+/*
+ * 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,
+};