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/*
Copyright (C) 2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
Laboratory CNBI (Chair in Non-Invasive Brain-Machine Interface)
Nicolas Bourdaud <nicolas.bourdaud@epfl.ch>
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/>.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <errno.h>
#include <stdio.h>
#include <gAPI.h>
#include "time-utils.h"
#include "fakegtec.h"
struct gtec_device {
const char* devname;
int inuse, running;
pthread_mutex_t lock;
gt_usbamp_config conf;
gt_usbamp_asynchron_config as_conf;
unsigned int nsample, lastsample;
pthread_t thid;
pthread_mutex_t updatelock;
pthread_cond_t cond;
void (*callback)(void*);
void *callback_data;
};
static const char* devname[] = {
"UB-2009.10.06",
"UB-2009.10.10",
"UB-2009.10.21",
"UB-2009.10.22",
"UB-2009.11.22"
};
#define NUMDEV ((int)(sizeof(devname)/sizeof(devname[0])))
static struct timespec org;
static int acquiring = 0;
static pthread_mutex_t acqlock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t acqcond = PTHREAD_COND_INITIALIZER;
static struct gtec_device gtdevices[NUMDEV];
static
struct gtec_device* get_dev(const char* dname, int *id)
{
int i;
struct gtec_device* dev = NULL;
for (i=0; i<NUMDEV; i++)
if (!strcmp(devname[i], dname)) {
dev = &(gtdevices[i]);
break;
}
if (dev && id)
*id = i;
return dev;
}
static
void initialize_device(struct gtec_device* gtdev)
{
gtdev->inuse = 0;
pthread_mutex_init(&(gtdev->lock), NULL);
pthread_mutex_init(&(gtdev->updatelock), NULL);
}
static
void* update_thread(void* data)
{
struct timespec ts;
int ret;
unsigned int diff, ntot, seed;
struct gtec_device* gtdev = data;
pthread_mutex_t* lock = &(gtdev->updatelock);
struct random_data rdata = {.rand_type = 0};
int32_t randnum = 0;
char state[128] = {0};
// Initialize random generator
clock_gettime(CLOCK_REALTIME, &ts);
seed = ts.tv_nsec;
initstate_r(seed, state, sizeof(state), &rdata);
// Wait for acquisition start
pthread_mutex_lock(&acqlock);
while (!acquiring) {
pthread_cond_wait(&acqcond, &acqlock);
}
pthread_mutex_unlock(&acqlock);
memcpy(&ts, &org, sizeof(ts));
random_r(&rdata, &randnum);
addtime(&ts, 0, 7000000 + randnum/2500);
pthread_mutex_lock(lock);
while (gtdev->running) {
ret = pthread_cond_timedwait(>dev->cond, lock, &ts);
if (ret == ETIMEDOUT) {
diff = difftime_ms(&ts, &org);
ntot = (diff*gtdev->conf.sample_rate)/1000;
gtdev->nsample = ntot;
pthread_mutex_unlock(lock);
gtdev->callback(gtdev->callback_data);
random_r(&rdata, &randnum);
addtime(&ts, 0, 7000000 + randnum/2500);
pthread_mutex_lock(lock);
}
}
pthread_mutex_unlock(lock);
return NULL;
}
API_EXPORTED
void GT_ShowDebugInformation( gt_bool show )
{
(void)show;
}
API_EXPORTED
gt_bool GT_UpdateDevices()
{
static int isinit = 0;
int i;
if (isinit)
return GT_TRUE;
for (i=0; i<NUMDEV; i++)
initialize_device(>devices[i]);
isinit = 1;
return GT_TRUE;
}
API_EXPORTED
gt_size GT_GetDeviceListSize()
{
return NUMDEV;
}
API_EXPORTED
char** GT_GetDeviceList()
{
int i;
char** devlist;
devlist = malloc(NUMDEV*sizeof(devlist[0]));
for (i=0; i<NUMDEV; i++) {
devlist[i] = malloc(strlen(devname[i])+1);
strcpy(devlist[i], devname[i]);
}
return devlist;
}
API_EXPORTED
gt_bool GT_FreeDeviceList( char** device_list, gt_size list_size )
{
gt_size i;
for (i=0; i<list_size; i++)
free(device_list[i]);
free(device_list);
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_OpenDevice( const char* device_name )
{
gt_bool retval = GT_TRUE;
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
pthread_mutex_lock(>dev->lock);
if (gtdev->inuse)
retval = 0;
else
gtdev->inuse = 1;
pthread_mutex_unlock(>dev->lock);
return retval;
}
API_EXPORTED
gt_bool GT_CloseDevice( const char* device_name )
{
gt_bool retval = GT_TRUE;
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
pthread_mutex_lock(>dev->lock);
if (!gtdev->inuse)
retval = 0;
else
gtdev->inuse = 0;
pthread_mutex_unlock(>dev->lock);
return retval;
}
API_EXPORTED
gt_bool GT_SetConfiguration( const char* device_name, void* configuration )
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
memcpy(&(gtdev->conf), configuration, sizeof(gtdev->conf));
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_GetConfiguration( const char* device_name, void* configuration )
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
memcpy(configuration, &(gtdev->conf), sizeof(gtdev->conf));
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_SetAsynchronConfiguration( const char* device_name, void* configuration )
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
memcpy(&(gtdev->as_conf), configuration, sizeof(gtdev->as_conf));
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_ApplyAsynchronConfiguration( const char* device_name )
{
return get_dev(device_name, NULL) ? GT_TRUE : GT_FALSE;
}
API_EXPORTED
gt_bool GT_GetAsynchronConfiguration( const char* device_name, void* configuration )
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
memcpy(configuration, &(gtdev->as_conf), sizeof(gtdev->as_conf));
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_StartAcquisition( const char* device_name )
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
if (gtdev->running)
return GT_FALSE;
gtdev->running = 1;
pthread_create(&(gtdev->thid), NULL, update_thread, gtdev);
if (!gtdev->conf.slave_mode) {
clock_gettime(CLOCK_REALTIME, &org);
pthread_mutex_lock(&acqlock);
acquiring = 1;
pthread_cond_broadcast(&acqcond);
pthread_mutex_unlock(&acqlock);
}
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_StopAcquisition( const char* device_name )
{
struct gtec_device* gtdev;
int retval = GT_FALSE;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
pthread_mutex_lock(>dev->updatelock);
if (!gtdev->running)
retval = GT_FALSE;
else {
gtdev->running = 0;
pthread_cond_signal(>dev->cond);
}
pthread_mutex_unlock(>dev->updatelock);
pthread_join(gtdev->thid, NULL);
if (!gtdev->conf.slave_mode) {
pthread_mutex_lock(&acqlock);
acquiring = 0;
pthread_mutex_unlock(&acqlock);
}
return retval;
}
API_EXPORTED
int GT_GetSamplesAvailable( const char* device_name )
{
struct gtec_device* gtdev;
unsigned int ntot;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return -1;
pthread_mutex_lock(>dev->updatelock);
ntot = gtdev->nsample;
pthread_mutex_unlock(>dev->updatelock);
return (ntot - gtdev->lastsample)*17*sizeof(float);
}
API_EXPORTED
int GT_GetData( const char* device_name, unsigned char* buffer, gt_size num_samples )
{
unsigned int last, j, s, ns;
struct gtec_device* gtdev;
float* data = (float*)buffer;
int idev = 0;
gtdev = get_dev(device_name, &idev);
if (!gtdev)
return -1;
ns = num_samples/(sizeof(*data)*17);
last = gtdev->lastsample;
/*if (ns+last > 1024)
ns = 1024 - last;
if (ns <= 0)
exit(EXIT_FAILURE);
num_samples = ns * (sizeof(*data)*17);*/
for (s=0; s<ns; s++) {
for (j=0; j<16; j++)
data[s*17 + j] = get_analog_val(s+last, idev*16+j);
data[s*17+16] = get_trigger_val(s+last, idev);
}
gtdev->lastsample += ns;
return num_samples;
}
API_EXPORTED
gt_bool GT_SetDataReadyCallBack( const char* device_name, void (*callback_function)(void*), void* data)
{
struct gtec_device* gtdev;
gtdev = get_dev(device_name, NULL);
if (!gtdev)
return GT_FALSE;
gtdev->callback = callback_function;
gtdev->callback_data = data;
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_DoSpecial( const char* device_name, gt_special* data );
/*------------------------------------------------------------------------------
* g.tec g.USBamp specific API functions
*/
API_EXPORTED
gt_size GT_GetBandpassFilterListSize( const char* device_name, gt_size sample_rate )
{
(void)device_name;
(void)sample_rate;
return 1;
}
API_EXPORTED
gt_bool GT_GetBandpassFilterList( const char* device_name, gt_size sample_rate, gt_filter_specification* filter, gt_size filter_size )
{
(void)device_name;
(void)sample_rate;
(void)filter_size;
gt_filter_specification filt = {
.f_upper = 200.0, .f_lower = 0.1, .sample_rate = 512,
.order = 4, .id = 1
};
memcpy(filter, &filt, sizeof(filt));
return GT_TRUE;
}
API_EXPORTED
gt_size GT_GetNotchFilterListSize( const char* device_name, gt_size sample_rate )
{
(void)device_name;
(void)sample_rate;
return 1;
}
API_EXPORTED
gt_bool GT_GetNotchFilterList( const char* device_name, gt_size sample_rate, gt_filter_specification* filter, gt_size filter_size )
{
(void)device_name;
(void)sample_rate;
(void)filter_size;
gt_filter_specification filt = {
.f_upper = 51, .f_lower = 49, .sample_rate = 512,
.order = 4, .id = 1
};
memcpy(filter, &filt, sizeof(filt));
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_GetChannelCalibration( const char* device_name, gt_usbamp_channel_calibration* calibration )
{
(void)device_name;
(void)calibration;
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_SetChannelCalibration( const char* device_name, gt_usbamp_channel_calibration* calibration )
{
(void)device_name;
(void)calibration;
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_Calibrate( const char* device_name, gt_usbamp_channel_calibration* calibration )
{
(void)device_name;
(void)calibration;
return GT_TRUE;
}
API_EXPORTED
gt_bool GT_GetImpedance( const char* device_name, gt_size channel, int* impedance )
{
(void)device_name;
(void)channel;
(void)impedance;
return GT_TRUE;
}
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