static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
serial = sdi->conn;
sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
return SR_ERR;
/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
sr_sw_limits_acquisition_start(&devc->limits);
std_session_send_df_header(sdi);
/* Poll every 50ms, or whenever some data comes in. */
serial_source_add(sdi->session, serial, G_IO_IN, 50,
kern_scale_receive_data, (void *)sdi);
return SR_OK;
}
static int scpi_serial_send(void *priv, const char *command)
{
int len, result, written;
gchar *terminated_command;
struct scpi_serial *sscpi = priv;
struct sr_serial_dev_inst *serial = sscpi->serial;
terminated_command = g_strconcat(command, "\n", NULL);
len = strlen(terminated_command);
written = 0;
while (written < len) {
result = serial_write_nonblocking(serial,
terminated_command + written, len - written);
if (result < 0) {
sr_err("Error while sending SCPI command: '%s'.", command);
g_free(terminated_command);
return SR_ERR;
}
written += result;
}
g_free(terminated_command);
sr_spew("Successfully sent SCPI command: '%s'.", command);
return SR_OK;
}
SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial)
{
const uint8_t wbuf = 'D';
sr_spew("Requesting DMM packet.");
return (serial_write_nonblocking(serial, &wbuf, 1) == 1) ? SR_OK : SR_ERR;
}
size_t subscribe_callback(void *ptr, size_t size, size_t n, void *stream)
{
if (serial_write_nonblocking((struct serial_device_t *)stream,
&ptr, size*n) < 0) {
return 0;
}
return size*n;
}
static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
{
struct sr_serial_dev_inst *serial;
uint8_t buffer[2];
buffer[0] = command >> 8;
buffer[1] = command;
if (!(serial = sdi->conn))
return SR_ERR;
if (serial_write_nonblocking(serial, (const void *)buffer, 2) != 2)
return SR_ERR;
return SR_OK;
}
static int scpi_serial_send(void *priv, const char *command)
{
int len, result, written;
struct scpi_serial *sscpi = priv;
struct sr_serial_dev_inst *serial = sscpi->serial;
len = strlen(command);
written = 0;
while (written < len) {
result = serial_write_nonblocking(serial,
command + written, len - written);
if (result < 0) {
sr_err("Error while sending SCPI command: '%s'.", command);
return SR_ERR;
}
written += result;
}
sr_spew("Successfully sent SCPI command: '%s'.", command);
return SR_OK;
}
static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
struct scale_info *scale;
struct sr_config *src;
GSList *l, *devices;
const char *conn, *serialcomm;
struct sr_dev_inst *sdi;
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
int ret;
size_t len;
uint8_t buf[128];
scale = (struct scale_info *)di;
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 = scale->conn;
serial = sr_serial_dev_inst_new(conn, serialcomm);
if (serial_open(serial, SERIAL_RDWR) != SR_OK)
return NULL;
sr_info("Probing serial port %s.", conn);
devices = NULL;
serial_flush(serial);
sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
goto scan_cleanup;
/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
/* Let's get a bit of data and see if we can find a packet. */
len = sizeof(buf);
ret = serial_stream_detect(serial, buf, &len, scale->packet_size,
scale->packet_valid, 3000, scale->baudrate);
if (ret != SR_OK)
goto scan_cleanup;
sr_info("Found device on port %s.", conn);
sdi = g_malloc0(sizeof(struct sr_dev_inst));
sdi->status = SR_ST_INACTIVE;
sdi->vendor = g_strdup(scale->vendor);
sdi->model = g_strdup(scale->device);
devc = g_malloc0(sizeof(struct dev_context));
sr_sw_limits_init(&devc->limits);
sdi->inst_type = SR_INST_SERIAL;
sdi->conn = serial;
sdi->priv = devc;
sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "Mass");
devices = g_slist_append(devices, sdi);
scan_cleanup:
serial_close(serial);
return std_scan_complete(di, devices);
}
