libsigrok/hardware/brymen-dmm/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.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 "protocol.h"
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_CONTINUOUS,
SR_CONF_LIMIT_MSEC,
};
SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
static struct sr_dev_driver *di = &brymen_bm857_driver_info;
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static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static GSList *brymen_scan(const char *conn, const char *serialcomm)
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{
struct sr_dev_inst *sdi;
struct dev_context *devc;
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struct drv_context *drvc;
struct sr_channel *ch;
struct sr_serial_dev_inst *serial;
GSList *devices;
int ret;
uint8_t buf[128];
size_t len;
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if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
return NULL;
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return NULL;
sr_info("Probing port %s.", conn);
devices = NULL;
/* Request reading */
if ((ret = brymen_packet_request(serial)) < 0) {
sr_err("Unable to send command: %d.", ret);
goto scan_cleanup;
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}
len = 128;
ret = brymen_stream_detect(serial, buf, &len, brymen_packet_length,
brymen_packet_is_valid, 1000, 9600);
if (ret != SR_OK)
goto scan_cleanup;
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sr_info("Found device on port %s.", conn);
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Brymen", "BM85x", NULL)))
goto scan_cleanup;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_err("Device context malloc failed.");
goto scan_cleanup;
}
sdi->inst_type = SR_INST_SERIAL;
sdi->conn = serial;
drvc = di->priv;
sdi->priv = devc;
sdi->driver = di;
if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1")))
goto scan_cleanup;
sdi->channels = g_slist_append(sdi->channels, ch);
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
scan_cleanup:
serial_close(serial);
return devices;
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}
static GSList *scan(GSList *options)
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{
struct drv_context *drvc;
struct sr_config *src;
GSList *devices, *l;
const char *conn, *serialcomm;
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devices = NULL;
drvc = di->priv;
drvc->instances = 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);
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 = brymen_scan(conn, serialcomm);
} else {
/* But 9600/8n1 should work all of the time. */
devices = brymen_scan(conn, "9600/8n1/dtr=1/rts=1");
}
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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;
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int ret;
(void)cg;
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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ret = SR_OK;
switch (id) {
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
break;
case SR_CONF_LIMIT_MSEC:
devc->limit_msec = g_variant_get_uint64(data);
break;
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default:
ret = SR_ERR_NA;
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}
return ret;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
{
(void)sdi;
(void)cg;
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;
default:
return SR_ERR_NA;
}
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;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
devc->cb_data = cb_data;
/*
* Reset the number of samples to take. If we've already collected our
* quota, but we start a new session, and don't reset this, we'll just
* quit without acquiring any new samples.
*/
devc->num_samples = 0;
devc->starttime = g_get_monotonic_time();
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
/* Poll every 50ms, or whenever some data comes in. */
serial = sdi->conn;
serial_source_add(serial, G_IO_IN, 50,
brymen_dmm_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 brymen_bm857_driver_info = {
.name = "brymen-bm857",
.longname = "Brymen BM857",
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.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = NULL,
.config_get = NULL,
.config_set = config_set,
.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,
};