libsigrok/hardware/agilent-dmm/api.c

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/*
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* This file is part of the libsigrok project.
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*
* 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "agilent-dmm.h"
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static const int32_t hwopts[] = {
SR_CONF_CONN,
SR_CONF_SERIALCOMM,
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};
static const int32_t hwcaps[] = {
SR_CONF_MULTIMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_LIMIT_MSEC,
SR_CONF_CONTINUOUS,
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};
extern const struct agdmm_job agdmm_jobs_u123x[];
extern const struct agdmm_recv agdmm_recvs_u123x[];
extern const struct agdmm_job agdmm_jobs_u125x[];
extern const struct agdmm_recv agdmm_recvs_u125x[];
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/* This works on all the Agilent U12xxA series, although the
* U127xA can apparently also run at 19200/8n1. */
#define SERIALCOMM "9600/8n1"
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static const struct agdmm_profile supported_agdmm[] = {
{ AGILENT_U1231A, "U1231A", agdmm_jobs_u123x, agdmm_recvs_u123x },
{ AGILENT_U1232A, "U1232A", agdmm_jobs_u123x, agdmm_recvs_u123x },
{ AGILENT_U1233A, "U1233A", agdmm_jobs_u123x, agdmm_recvs_u123x },
{ AGILENT_U1251A, "U1251A", agdmm_jobs_u125x, agdmm_recvs_u125x },
{ AGILENT_U1252A, "U1252A", agdmm_jobs_u125x, agdmm_recvs_u125x },
{ AGILENT_U1253A, "U1253A", agdmm_jobs_u125x, agdmm_recvs_u125x },
{ 0, NULL, NULL, NULL }
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};
SR_PRIV struct sr_dev_driver agdmm_driver_info;
static struct sr_dev_driver *di = &agdmm_driver_info;
static int init(struct sr_context *sr_ctx)
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{
return std_init(sr_ctx, di, LOG_PREFIX);
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}
static GSList *scan(GSList *options)
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{
struct sr_dev_inst *sdi;
struct drv_context *drvc;
struct dev_context *devc;
struct sr_config *src;
struct sr_channel *ch;
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struct sr_serial_dev_inst *serial;
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GSList *l, *devices;
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int len, i;
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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) {
src = l->data;
switch (src->key) {
case SR_CONF_CONN:
conn = g_variant_get_string(src->data, NULL);
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break;
case SR_CONF_SERIALCOMM:
serialcomm = g_variant_get_string(src->data, NULL);
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break;
}
}
if (!conn)
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return NULL;
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if (!serialcomm)
serialcomm = SERIALCOMM;
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if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
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return NULL;
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
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return NULL;
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serial_flush(serial);
if (serial_write(serial, "*IDN?\r\n", 7) == -1) {
sr_err("Unable to send identification string: %s.",
strerror(errno));
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return NULL;
}
len = 128;
if (!(buf = g_try_malloc(len))) {
sr_err("Serial buffer malloc failed.");
return NULL;
}
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serial_readline(serial, &buf, &len, 150);
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if (!len)
return NULL;
tokens = g_strsplit(buf, ",", 4);
if (!strcmp("Agilent Technologies", tokens[0])
&& tokens[1] && tokens[2] && tokens[3]) {
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for (i = 0; supported_agdmm[i].model; i++) {
if (strcmp(supported_agdmm[i].modelname, tokens[1]))
continue;
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if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Agilent",
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tokens[1], tokens[3])))
return NULL;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_err("Device context malloc failed.");
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return NULL;
}
devc->profile = &supported_agdmm[i];
devc->cur_mq = -1;
sdi->inst_type = SR_INST_SERIAL;
sdi->conn = serial;
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sdi->priv = devc;
sdi->driver = di;
if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1")))
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return NULL;
sdi->channels = g_slist_append(sdi->channels, ch);
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drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
break;
}
}
g_strfreev(tokens);
g_free(buf);
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serial_close(serial);
if (!devices)
sr_serial_dev_inst_free(serial);
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return devices;
}
static GSList *dev_list(void)
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{
return ((struct drv_context *)(di->priv))->instances;
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}
static int cleanup(void)
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{
return std_dev_clear(di, NULL);
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}
static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
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{
struct dev_context *devc;
(void)cg;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
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return SR_ERR_BUG;
}
switch (id) {
case SR_CONF_LIMIT_MSEC:
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/* TODO: not yet implemented */
if (g_variant_get_uint64(data) == 0) {
sr_err("LIMIT_MSEC can't be 0.");
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return SR_ERR;
}
devc->limit_msec = g_variant_get_uint64(data);
sr_dbg("Setting time limit to %" PRIu64 "ms.",
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devc->limit_msec);
break;
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
sr_dbg("Setting sample limit to %" PRIu64 ".",
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devc->limit_samples);
break;
default:
return SR_ERR_NA;
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}
return SR_OK;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
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{
(void)sdi;
(void)cg;
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switch (key) {
case SR_CONF_SCAN_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
break;
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
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default:
return SR_ERR_NA;
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}
return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
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{
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
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return SR_ERR_BUG;
}
devc->cb_data = cb_data;
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
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/* Poll every 100ms, or whenever some data comes in. */
serial = sdi->conn;
serial_source_add(serial, G_IO_IN, 100, agdmm_receive_data, (void *)sdi);
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return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
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{
return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
sdi->conn, LOG_PREFIX);
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}
SR_PRIV struct sr_dev_driver agdmm_driver_info = {
.name = "agilent-dmm",
.longname = "Agilent U12xx series DMMs",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = NULL,
.config_get = NULL,
.config_set = config_set,
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.config_list = config_list,
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.dev_open = std_serial_dev_open,
.dev_close = std_serial_dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
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.priv = NULL,
};