libsigrok/hardware/norma-dmm/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
*
* 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 "protocol.h"
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static const int32_t hwopts[] = {
SR_CONF_CONN,
SR_CONF_SERIALCOMM,
};
static const int32_t hwcaps[] = {
SR_CONF_MULTIMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_LIMIT_MSEC,
SR_CONF_CONTINUOUS,
};
#define BUF_MAX 50
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#define SERIALCOMM "4800/8n1/dtr=1/rts=0/flow=1"
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SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
static struct sr_dev_driver *di = &norma_dmm_driver_info;
static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static GSList *scan(GSList *options)
{
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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_config *src;
struct sr_probe *probe;
struct sr_serial_dev_inst *serial;
GSList *l, *devices;
int len, cnt;
const char *conn, *serialcomm;
char *buf;
char fmttype[10];
char req[10];
int auxtype;
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devices = NULL;
drvc = di->priv;
drvc->instances = NULL;
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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)
serialcomm = SERIALCOMM;
if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
return NULL;
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return NULL;
serial_flush(serial);
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if (!(buf = g_try_malloc(BUF_MAX))) {
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sr_err("Serial buffer malloc failed.");
return NULL;
}
snprintf(req, sizeof(req), "%s\r\n",
nmadmm_requests[NMADMM_REQ_IDN].req_str);
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for (cnt = 0; cnt < 7; cnt++) {
if (serial_write(serial, req, strlen(req)) == -1) {
sr_err("Unable to send identification request: %d %s.",
errno, strerror(errno));
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return NULL;
}
len = BUF_MAX;
serial_readline(serial, &buf, &len, 1500);
if (!len)
continue;
buf[BUF_MAX - 1] = '\0';
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/* Match ID string, e.g. "1834 065 V1.06,IF V1.02" (DM950) */
if (g_regex_match_simple("^1834 [^,]*,IF V*", (char *)buf, 0, 0)) {
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auxtype = xgittoint(buf[7]);
// TODO: Will this work with non-DM950?
snprintf(fmttype, sizeof(fmttype), "DM9%d0", auxtype);
sr_spew("Norma %s DMM %s detected!", fmttype, &buf[9]);
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
"Norma", fmttype, buf + 9)))
return NULL;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
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sr_err("Device context malloc failed.");
return NULL;
}
devc->type = auxtype;
devc->version = g_strdup(&buf[9]);
devc->elapsed_msec = g_timer_new();
sdi->conn = serial;
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;
}
/*
* The interface of the DM9x0 contains a cap that needs to
* charge for up to 10s before the interface works, if not
* powered externally. Therefore wait a little to improve
* chances.
*/
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if (cnt == 3) {
sr_info("Waiting 5s to allow interface to settle.");
g_usleep(5 * 1000 * 1000);
}
}
g_free(buf);
serial_close(serial);
if (!devices)
sr_serial_dev_inst_free(serial);
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return devices;
}
static GSList *dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
}
static int dev_clear(void)
{
return std_dev_clear(di, NULL);
}
static int dev_close(struct sr_dev_inst *sdi)
{
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struct dev_context *devc;
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std_serial_dev_close(sdi);
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/* Free dynamically allocated resources. */
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if ((devc = sdi->priv) && devc->version) {
g_free(devc->version);
devc->version = NULL;
g_timer_destroy(devc->elapsed_msec);
}
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return SR_OK;
}
static int cleanup(void)
{
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return dev_clear();
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}
static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
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{
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struct dev_context *devc;
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(void)probe_group;
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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.");
return SR_ERR_BUG;
}
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switch (key) {
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case SR_CONF_LIMIT_MSEC:
/* TODO: not yet implemented */
if (g_variant_get_uint64(data) == 0) {
sr_err("LIMIT_MSEC can't be 0.");
return SR_ERR;
}
devc->limit_msec = g_variant_get_uint64(data);
sr_dbg("Setting time limit to %" PRIu64 "ms.",
devc->limit_msec);
break;
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
sr_dbg("Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
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default:
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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,
const struct sr_probe_group *probe_group)
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{
(void)sdi;
(void)probe_group;
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switch (key) {
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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 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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(void)sdi;
(void)cb_data;
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if (!sdi || !cb_data || !(devc = sdi->priv))
return SR_ERR_BUG;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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devc->cb_data = cb_data;
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
/* Start timer, if required. */
if (devc->limit_msec)
g_timer_start(devc->elapsed_msec);
/* Poll every 100ms, or whenever some data comes in. */
serial = sdi->conn;
serial_source_add(serial, G_IO_IN, 100, norma_dmm_receive_data,
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(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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struct dev_context *devc;
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/* Stop timer, if required. */
if (sdi && (devc = sdi->priv) && devc->limit_msec)
g_timer_stop(devc->elapsed_msec);
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return std_serial_dev_acquisition_stop(sdi, cb_data, dev_close,
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sdi->conn, LOG_PREFIX);
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}
SR_PRIV struct sr_dev_driver norma_dmm_driver_info = {
.name = "norma-dmm",
.longname = "Norma DM9x0 / Siemens B102x DMMs",
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.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = dev_clear,
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.config_get = NULL,
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.config_set = config_set,
.config_list = config_list,
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.dev_open = std_serial_dev_open,
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.dev_close = dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};