libsigrok/hardware/fluke-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>
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#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 "fluke-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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};
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SR_PRIV struct sr_dev_driver flukedmm_driver_info;
static struct sr_dev_driver *di = &flukedmm_driver_info;
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static char *scan_conn[] = {
/* 287/289 */
"115200/8n1",
/* 187/189 */
"9600/8n1",
/* Scopemeter 190 series */
"1200/8n1",
NULL
};
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static const struct flukedmm_profile supported_flukedmm[] = {
{ FLUKE_187, "187", 100, 1000 },
{ FLUKE_287, "287", 100, 1000 },
{ FLUKE_190, "199B", 1000, 3500 },
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};
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/* Properly close and free all devices. */
static int clear_instances(void)
{
struct sr_dev_inst *sdi;
struct drv_context *drvc;
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
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GSList *l;
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if (!(drvc = di->priv))
return SR_OK;
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drvc = di->priv;
for (l = drvc->instances; l; l = l->next) {
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if (!(sdi = l->data))
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continue;
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if (!(devc = sdi->priv))
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continue;
serial = sdi->conn;
sr_serial_dev_inst_free(serial);
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sr_dev_inst_free(sdi);
}
g_slist_free(drvc->instances);
drvc->instances = NULL;
return SR_OK;
}
static int hw_init(struct sr_context *sr_ctx)
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{
return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
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}
static GSList *fluke_scan(const char *conn, const char *serialcomm)
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{
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struct sr_dev_inst *sdi;
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struct drv_context *drvc;
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struct dev_context *devc;
struct sr_probe *probe;
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struct sr_serial_dev_inst *serial;
GSList *devices;
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int retry, len, i, s;
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char buf[128], *b, **tokens;
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if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
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return NULL;
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if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
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return NULL;
drvc = di->priv;
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b = buf;
retry = 0;
devices = NULL;
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/* We'll try the discovery sequence three times in case the device
* is not in an idle state when we send ID. */
while (!devices && retry < 3) {
retry++;
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serial_flush(serial);
if (serial_write(serial, "ID\r", 3) == -1) {
sr_err("Unable to send ID string: %s.",
strerror(errno));
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continue;
}
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/* Response is first a CMD_ACK byte (ASCII '0' for OK,
* or '1' to signify an error. */
len = 128;
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serial_readline(serial, &b, &len, 150);
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if (len != 1)
continue;
if (buf[0] != '0')
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continue;
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/* If CMD_ACK was OK, ID string follows. */
len = 128;
serial_readline(serial, &b, &len, 850);
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if (len < 10)
continue;
if (strcspn(buf, ",") < 15)
/* Looks like it's comma-separated. */
tokens = g_strsplit(buf, ",", 3);
else
/* Fluke 199B, at least, uses semicolon. */
tokens = g_strsplit(buf, ";", 3);
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if (!strncmp("FLUKE", tokens[0], 5)
&& tokens[1] && tokens[2]) {
for (i = 0; supported_flukedmm[i].model; i++) {
if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
continue;
/* Skip leading spaces in version number. */
for (s = 0; tokens[1][s] == ' '; s++);
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
tokens[0] + 6, tokens[1] + s)))
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_flukedmm[i];
sdi->conn = serial;
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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;
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}
}
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g_strfreev(tokens);
if (devices)
/* Found one. */
break;
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}
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serial_close(serial);
if (!devices)
sr_serial_dev_inst_free(serial);
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return devices;
}
static GSList *hw_scan(GSList *options)
{
struct sr_config *src;
GSList *l, *devices;
int i;
const char *conn, *serialcomm;
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);
break;
case SR_CONF_SERIALCOMM:
serialcomm = g_variant_get_string(src->data, NULL);
break;
}
}
if (!conn)
return NULL;
if (serialcomm) {
/* Use the provided comm specs. */
devices = fluke_scan(conn, serialcomm);
} else {
for (i = 0; scan_conn[i]; i++) {
if ((devices = fluke_scan(conn, scan_conn[i])))
break;
/* The Scopemeter 199B, at least, requires this
* after all the 115k/9.6k confusion. */
g_usleep(5000);
}
}
return devices;
}
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static GSList *hw_dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
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}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
struct sr_serial_dev_inst *serial;
serial = sdi->conn;
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return SR_ERR;
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sdi->status = SR_ST_ACTIVE;
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return SR_OK;
}
static int hw_dev_close(struct sr_dev_inst *sdi)
{
struct sr_serial_dev_inst *serial;
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serial = sdi->conn;
if (serial && serial->fd != -1) {
serial_close(serial);
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sdi->status = SR_ST_INACTIVE;
}
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return SR_OK;
}
static int hw_cleanup(void)
{
clear_instances();
return SR_OK;
}
static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
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{
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struct dev_context *devc;
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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;
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default:
return SR_ERR_NA;
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}
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return SR_OK;
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}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
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{
(void)sdi;
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;
}
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static int hw_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, DRIVER_LOG_DOMAIN);
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/* Poll every 100ms, or whenever some data comes in. */
serial = sdi->conn;
sr_source_add(serial->fd, G_IO_IN, 50, fluke_receive_data, (void *)sdi);
if (serial_write(serial, "QM\r", 3) == -1) {
sr_err("Unable to send QM: %s.", strerror(errno));
return SR_ERR;
}
devc->cmd_sent_at = g_get_monotonic_time() / 1000;
devc->expect_response = TRUE;
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return SR_OK;
}
static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
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{
return std_hw_dev_acquisition_stop_serial(sdi, cb_data, hw_dev_close,
sdi->conn, DRIVER_LOG_DOMAIN);
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}
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SR_PRIV struct sr_dev_driver flukedmm_driver_info = {
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.name = "fluke-dmm",
.longname = "Fluke 18x/28x series DMMs",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
.config_get = NULL,
.config_set = config_set,
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.config_list = config_list,
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.dev_open = hw_dev_open,
.dev_close = hw_dev_close,
.dev_acquisition_start = hw_dev_acquisition_start,
.dev_acquisition_stop = hw_dev_acquisition_stop,
.priv = NULL,
};