static
struct eegdev* open_device(struct grpconf group[3])
{
struct eegdev* dev;
char devicestr[256] = "biosemi";
if (!(dev = egd_open(devicestr)))
return NULL;
group[0].nch = egd_get_numch(dev, egd_sensor_type("eeg"));
group[1].nch = egd_get_numch(dev, egd_sensor_type("undefined"));
group[2].nch = egd_get_numch(dev, egd_sensor_type("trigger"));
return dev;
}
struct acq* acq_init(const char* devstring, acqcb cb, void* cbdata)
{
struct acq* acq;
int i;
if (!(acq = calloc(sizeof(*acq), 1)))
return NULL;
// Open the connection to the device
if (!(acq->dev = egd_open(devstring))) {
fprintf(stderr, "Connection error: %s\n",strerror(errno));
goto exit;
}
// Setup the transfer to the data buffers
if (configure_egd_acq(acq)
|| egd_acq_setup(acq->dev, 3, acq->strides, 3, acq->grp)) {
fprintf(stderr, "Acq_setup: %s\n", strerror(errno));
goto exit;
}
acq->cb = cb;
acq->cbdata = cbdata ? cbdata : acq;
if (pthread_create(&acq->thid, NULL, acq_loop_fn, acq))
goto exit;
return acq;
exit:
if (acq->dev)
egd_close(acq->dev);
for (i=0; i<3; i++)
free(acq->buff[i]);
free(acq);
return NULL;
}
