libsigrok/hardware/colead-slm/api.c

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/*
* This file is part of the libsigrok 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 "protocol.h"
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
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/* The Colead SL-5868P uses this. */
#define SERIALCOMM "2400/8n1"
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static const int hwopts[] = {
SR_CONF_CONN,
SR_CONF_SERIALCOMM,
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0,
};
static const int hwcaps[] = {
SR_CONF_SOUNDLEVELMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_LIMIT_MSEC,
SR_CONF_CONTINUOUS,
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0,
};
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SR_PRIV struct sr_dev_driver colead_slm_driver_info;
static struct sr_dev_driver *di = &colead_slm_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;
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for (l = drvc->instances; l; l = l->next) {
if (!(sdi = l->data))
continue;
if (!(devc = sdi->priv))
continue;
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sr_serial_dev_inst_free(devc->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 *hw_scan(GSList *options)
{
struct drv_context *drvc;
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struct dev_context *devc;
struct sr_dev_inst *sdi;
struct sr_config *src;
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struct sr_probe *probe;
GSList *devices, *l;
const char *conn, *serialcomm;
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drvc = di->priv;
drvc->instances = NULL;
devices = 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 = src->value;
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break;
case SR_CONF_SERIALCOMM:
serialcomm = src->value;
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break;
}
}
if (!conn)
return NULL;
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if (!serialcomm)
serialcomm = SERIALCOMM;
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if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Colead",
"SL-5868P", NULL)))
return NULL;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_dbg("Device context malloc failed.");
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return NULL;
}
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if (!(devc->serial = sr_serial_dev_inst_new(conn, serialcomm)))
return NULL;
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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);
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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)
{
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struct dev_context *devc;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
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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)
{
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struct dev_context *devc;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
if (devc->serial && devc->serial->fd != -1) {
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serial_close(devc->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, const void *value, 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)
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return SR_ERR;
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if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
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}
switch (id) {
case SR_CONF_LIMIT_MSEC:
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/* TODO: not yet implemented */
if (*(const uint64_t *)value == 0) {
sr_err("LIMIT_MSEC can't be 0.");
return SR_ERR;
}
devc->limit_msec = *(const uint64_t *)value;
sr_dbg("Setting time limit to %" PRIu64 "ms.",
devc->limit_msec);
break;
case SR_CONF_LIMIT_SAMPLES:
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devc->limit_samples = *(const uint64_t *)value;
sr_dbg("Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
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default:
sr_err("Unknown capability: %d.", id);
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return SR_ERR;
break;
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}
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return SR_OK;
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}
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static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
{
(void)sdi;
switch (key) {
case SR_CONF_SCAN_OPTIONS:
*data = hwopts;
break;
case SR_CONF_DEVICE_OPTIONS:
*data = hwcaps;
break;
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default:
return SR_ERR_ARG;
}
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 sr_datafeed_packet packet;
struct sr_datafeed_header header;
struct dev_context *devc;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
sr_dbg("Starting acquisition.");
devc->cb_data = cb_data;
/* Send header packet to the session bus. */
sr_dbg("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);
/* Poll every 150ms, or whenever some data comes in. */
sr_source_add(devc->serial->fd, G_IO_IN, 150, colead_slm_receive_data,
(void *)sdi);
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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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{
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struct sr_datafeed_packet packet;
struct dev_context *devc;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR;
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if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
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}
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sr_dbg("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("Sending SR_DF_END.");
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
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return SR_OK;
}
SR_PRIV struct sr_dev_driver colead_slm_driver_info = {
.name = "colead-slm",
.longname = "Colead SLM",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
.scan = hw_scan,
.dev_list = hw_dev_list,
.dev_clear = clear_instances,
.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,
};