int main(int argc, char *argv[]) {
int n, i, c, count = 0, sample = 0, chan = 0, status = 0, verbose = 0, labelSize;
unsigned char buf[OPENBCI_BUFLEN], byte;
char *labelString;
SerialPort SP;
host_t host;
struct timespec tic, toc;
/* these represent the general acquisition system properties */
int nchans = OPENBCI_NCHANS;
float fsample = OPENBCI_FSAMPLE;
/* these are used in the communication with the FT buffer and represent statefull information */
int ftSocket = -1;
ft_buffer_server_t *ftServer;
message_t *request = NULL;
message_t *response = NULL;
header_t *header = NULL;
data_t *data = NULL;
ft_chunkdef_t *label = NULL;
/* this contains the configuration details */
configuration config;
/* configure the default settings */
config.blocksize = 10;
config.port = 1972;
config.hostname = strdup("-");
config.serial = strdup("/dev/tty.usbserial-DN0094FY");
config.reset = strdup("on");
config.datalog = strdup("off");
config.testsignal = strdup("off");
config.timestamp = strdup("on");
config.timeref = strdup("start");
config.enable_chan1 = strdup("on");
config.enable_chan2 = strdup("on");
config.enable_chan3 = strdup("on");
config.enable_chan4 = strdup("on");
config.enable_chan5 = strdup("on");
config.enable_chan6 = strdup("on");
config.enable_chan7 = strdup("on");
config.enable_chan8 = strdup("on");
config.enable_chan9 = strdup("on");
config.enable_chan10 = strdup("on");
config.enable_chan11 = strdup("on");
config.label_chan1 = strdup("ADC1");
config.label_chan2 = strdup("ADC2");
config.label_chan3 = strdup("ADC3");
config.label_chan4 = strdup("ADC4");
config.label_chan5 = strdup("ADC5");
config.label_chan6 = strdup("ADC6");
config.label_chan7 = strdup("ADC7");
config.label_chan8 = strdup("ADC8");
config.label_chan9 = strdup("AccelerationX");
config.label_chan10 = strdup("AccelerationY");
config.label_chan11 = strdup("AccelerationZ");
config.label_chan12 = strdup("TimeStamp");
config.setting_chan1 = strdup("x1060110X");
config.setting_chan2 = strdup("x2060110X");
config.setting_chan3 = strdup("x3060110X");
config.setting_chan4 = strdup("x4060110X");
config.setting_chan5 = strdup("x5060110X");
config.setting_chan6 = strdup("x6060110X");
config.setting_chan7 = strdup("x7060110X");
config.setting_chan8 = strdup("x8060110X");
config.impedance_chan1 = strdup("z100Z");
config.impedance_chan2 = strdup("z200Z");
config.impedance_chan3 = strdup("z300Z");
config.impedance_chan4 = strdup("z400Z");
config.impedance_chan5 = strdup("z500Z");
config.impedance_chan6 = strdup("z600Z");
config.impedance_chan7 = strdup("z700Z");
config.impedance_chan8 = strdup("z800Z");
if (argc<2) {
printf(usage);
exit(0);
}
if (argc==2) {
if (strncmp(argv[1], "/dev", 4)==0 || strncasecmp(argv[1], "COM", 3)==0)
/* the second argument is the serial port */
config.serial = strdup(argv[1]);
else {
/* the second argument is the configuration file */
fprintf(stderr, "openbci2ft: loading configuration from '%s'\n", argv[1]);
if (ini_parse(argv[1], iniHandler, &config) < 0) {
fprintf(stderr, "Can't load '%s'\n", argv[1]);
return 1;
}
}
}
if (argc>2)
strcpy(host.name, argv[2]);
else {
strcpy(host.name, config.hostname);
}
if (argc>3)
host.port = atoi(argv[3]);
else {
host.port = config.port;
}
#define ISTRUE(s) strcasecmp(s, "on")==0
nchans = 0;
if (ISTRUE(config.enable_chan1))
nchans++;
if (ISTRUE(config.enable_chan2))
nchans++;
if (ISTRUE(config.enable_chan3))
nchans++;
if (ISTRUE(config.enable_chan4))
nchans++;
if (ISTRUE(config.enable_chan5))
nchans++;
if (ISTRUE(config.enable_chan6))
nchans++;
if (ISTRUE(config.enable_chan7))
nchans++;
if (ISTRUE(config.enable_chan8))
nchans++;
if (ISTRUE(config.enable_chan9))
nchans++;
if (ISTRUE(config.enable_chan10))
nchans++;
if (ISTRUE(config.enable_chan11))
nchans++;
if (ISTRUE(config.timestamp))
nchans++;
fprintf(stderr, "openbci2ft: serial = %s\n", config.serial);
fprintf(stderr, "openbci2ft: hostname = %s\n", host.name);
fprintf(stderr, "openbci2ft: port = %d\n", host.port);
fprintf(stderr, "openbci2ft: blocksize = %d\n", config.blocksize);
fprintf(stderr, "openbci2ft: reset = %s\n", config.reset);
fprintf(stderr, "openbci2ft: datalog = %s\n", config.datalog);
fprintf(stderr, "openbci2ft: timestamp = %s\n", config.timestamp);
fprintf(stderr, "openbci2ft: testsignal = %s\n", config.testsignal);
/* Spawn tcpserver or connect to remote buffer */
if (strcmp(host.name, "-") == 0) {
ftServer = ft_start_buffer_server(host.port, NULL, NULL, NULL);
if (ftServer==NULL) {
fprintf(stderr, "openbci2ft: could not start up a local buffer serving at port %i\n", host.port);
return 1;
}
ftSocket = 0;
printf("openbci2ft: streaming to local buffer on port %i\n", host.port);
}
else {
ftSocket = open_connection(host.name, host.port);
if (ftSocket < 0) {
fprintf(stderr, "openbci2ft: could not connect to remote buffer at %s:%i\n", host.name, host.port);
return 1;
}
printf("openbci2ft: streaming to remote buffer at %s:%i\n", host.name, host.port);
}
/* allocate the elements that will be used in the communication to the FT buffer */
request = malloc(sizeof(message_t));
request->def = malloc(sizeof(messagedef_t));
request->buf = NULL;
request->def->version = VERSION;
request->def->bufsize = 0;
header = malloc(sizeof(header_t));
header->def = malloc(sizeof(headerdef_t));
header->buf = NULL;
data = malloc(sizeof(data_t));
data->def = malloc(sizeof(datadef_t));
data->buf = NULL;
/* define the header */
header->def->nchans = nchans;
header->def->fsample = fsample;
header->def->nsamples = 0;
header->def->nevents = 0;
header->def->data_type = DATATYPE_FLOAT32;
header->def->bufsize = 0;
/* FIXME add the channel names */
labelSize = 0; /* count the number of bytes required */
if (ISTRUE (config.enable_chan1))
labelSize += strlen (config.label_chan1) + 1;
if (ISTRUE (config.enable_chan2))
labelSize += strlen (config.label_chan2) + 1;
if (ISTRUE (config.enable_chan3))
labelSize += strlen (config.label_chan3) + 1;
if (ISTRUE (config.enable_chan4))
labelSize += strlen (config.label_chan4) + 1;
if (ISTRUE (config.enable_chan5))
labelSize += strlen (config.label_chan5) + 1;
if (ISTRUE (config.enable_chan6))
labelSize += strlen (config.label_chan6) + 1;
if (ISTRUE (config.enable_chan7))
labelSize += strlen (config.label_chan7) + 1;
if (ISTRUE (config.enable_chan8))
labelSize += strlen (config.label_chan8) + 1;
if (ISTRUE (config.enable_chan9))
labelSize += strlen (config.label_chan9) + 1;
if (ISTRUE (config.enable_chan10))
labelSize += strlen (config.label_chan10) + 1;
if (ISTRUE (config.enable_chan11))
labelSize += strlen (config.label_chan11) + 1;
if (ISTRUE (config.timestamp))
labelSize += strlen (config.label_chan12) + 1;
if (verbose > 0)
fprintf (stderr, "openbci2ft: labelSize = %d\n", labelSize);
/* go over all channels for a 2nd time, now copying the strings to the destination */
labelString = (char *) malloc (labelSize * sizeof(char));
labelSize = 0;
if (ISTRUE (config.enable_chan1)) {
strcpy (labelString+labelSize, config.label_chan1);
labelSize += strlen (config.label_chan1) + 1;
}
if (ISTRUE (config.enable_chan2)) {
strcpy (labelString+labelSize, config.label_chan2);
labelSize += strlen (config.label_chan2) + 1;
}
if (ISTRUE (config.enable_chan3)) {
strcpy (labelString+labelSize, config.label_chan3);
labelSize += strlen (config.label_chan3) + 1;
}
if (ISTRUE (config.enable_chan4)) {
strcpy (labelString+labelSize, config.label_chan4);
labelSize += strlen (config.label_chan4) + 1;
}
if (ISTRUE (config.enable_chan5)) {
strcpy (labelString+labelSize, config.label_chan5);
labelSize += strlen (config.label_chan5) + 1;
}
if (ISTRUE (config.enable_chan6)) {
strcpy (labelString+labelSize, config.label_chan6);
labelSize += strlen (config.label_chan6) + 1;
}
if (ISTRUE (config.enable_chan7)) {
strcpy (labelString+labelSize, config.label_chan7);
labelSize += strlen (config.label_chan7) + 1;
}
if (ISTRUE (config.enable_chan8)) {
strcpy (labelString+labelSize, config.label_chan8);
labelSize += strlen (config.label_chan8) + 1;
}
if (ISTRUE (config.enable_chan9)) {
strcpy (labelString+labelSize, config.label_chan9);
labelSize += strlen (config.label_chan9) + 1;
}
if (ISTRUE (config.enable_chan10)) {
strcpy (labelString+labelSize, config.label_chan10);
labelSize += strlen (config.label_chan10) + 1;
}
if (ISTRUE (config.enable_chan11)) {
strcpy (labelString+labelSize, config.label_chan11);
labelSize += strlen (config.label_chan11) + 1;
}
if (ISTRUE (config.timestamp)) {
strcpy (labelString+labelSize, config.label_chan12);
labelSize += strlen (config.label_chan12) + 1;
}
/* add the channel label chunk to the header */
label = (ft_chunkdef_t *) malloc (sizeof (ft_chunkdef_t));
label->type = FT_CHUNK_CHANNEL_NAMES;
label->size = labelSize;
header->def->bufsize = append (&header->buf, header->def->bufsize, label, sizeof (ft_chunkdef_t));
header->def->bufsize = append (&header->buf, header->def->bufsize, labelString, labelSize);
FREE (label);
FREE (labelString);
/* define the constant part of the data and allocate space for the variable part */
data->def->nchans = nchans;
data->def->nsamples = config.blocksize;
data->def->data_type = DATATYPE_FLOAT32;
data->def->bufsize = WORDSIZE_FLOAT32 * nchans * config.blocksize;
data->buf = malloc (data->def->bufsize);
/* initialization phase, send the header */
request->def->command = PUT_HDR;
request->def->bufsize = append (&request->buf, request->def->bufsize, header->def, sizeof (headerdef_t));
request->def->bufsize = append (&request->buf, request->def->bufsize, header->buf, header->def->bufsize);
/* this is not needed any more */
cleanup_header (&header);
status = clientrequest (ftSocket, request, &response);
if (verbose > 0)
fprintf (stderr, "openbci2ft: clientrequest returned %d\n", status);
if (status)
{
fprintf (stderr, "openbci2ft: could not send request to buffer\n");
exit (1);
}
if (status || response == NULL || response->def == NULL)
{
fprintf (stderr, "openbci2ft: error in %s on line %d\n", __FILE__,
__LINE__);
exit (1);
}
cleanup_message (&request);
if (response->def->command != PUT_OK)
{
fprintf (stderr, "openbci2ft: error in 'put header' request.\n");
exit (1);
}
cleanup_message (&response);
/* open the serial port */
fprintf (stderr, "openbci2ft: opening serial port ...\n");
if (!serialOpenByName (&SP, config.serial))
{
fprintf (stderr, "Could not open serial port %s\n", config.serial);
return 1;
}
if (!serialSetParameters (&SP, 115200, 8, 0, 0, 0))
{
fprintf (stderr, "Could not modify serial port parameters\n");
return 1;
}
fprintf (stderr, "openbci2ft: opening serial port ... ok\n");
/* 8-bit board will always be initialized upon opening serial port, 32-bit board needs explicit initialization */
fprintf (stderr, "openbci2ft: initializing ...\n");
fprintf (stderr,
"openbci2ft: press reset on the OpenBCI board if this takes too long\n");
if (ISTRUE (config.reset))
serialWrite (&SP, 1, "v"); /* soft reset, this will return $$$ */
else
serialWrite (&SP, 1, "D"); /* query default channel settings, this will also return $$$ */
/* wait for '$$$' which indicates that the OpenBCI has been initialized */
c = 0;
while (c != 3)
{
usleep (1000);
n = serialRead (&SP, 1, &byte);
if (n == 1)
{
if (byte == '$')
c++;
else
c = 0;
}
} /* while waiting for '$$$' */
if (strcasecmp (config.datalog, "14s") == 0)
serialWrite (&SP, 1, "a");
else if (strcasecmp (config.datalog, "5min") == 0)
serialWrite (&SP, 1, "A");
else if (strcasecmp (config.datalog, "15min") == 0)
serialWrite (&SP, 1, "S");
else if (strcasecmp (config.datalog, "30min") == 0)
serialWrite (&SP, 1, "F");
else if (strcasecmp (config.datalog, "1hr") == 0)
serialWrite (&SP, 1, "G");
else if (strcasecmp (config.datalog, "2hr") == 0)
serialWrite (&SP, 1, "H");
else if (strcasecmp (config.datalog, "4hr") == 0)
serialWrite (&SP, 1, "J");
else if (strcasecmp (config.datalog, "12hr") == 0)
serialWrite (&SP, 1, "K");
else if (strcasecmp (config.datalog, "24hr") == 0)
serialWrite (&SP, 1, "L");
else if (strcasecmp (config.datalog, "off") != 0)
{
fprintf (stderr, "Incorrect specification of datalog\n");
return 1;
}
serialWriteSlow (&SP, strlen (config.setting_chan1), config.setting_chan1);
serialWriteSlow (&SP, strlen (config.setting_chan2), config.setting_chan2);
serialWriteSlow (&SP, strlen (config.setting_chan3), config.setting_chan3);
serialWriteSlow (&SP, strlen (config.setting_chan4), config.setting_chan4);
serialWriteSlow (&SP, strlen (config.setting_chan5), config.setting_chan5);
serialWriteSlow (&SP, strlen (config.setting_chan6), config.setting_chan6);
serialWriteSlow (&SP, strlen (config.setting_chan7), config.setting_chan7);
serialWriteSlow (&SP, strlen (config.setting_chan8), config.setting_chan8);
if (strcasecmp (config.testsignal, "gnd") == 0)
serialWrite (&SP, 1, "0");
else if (strcasecmp (config.testsignal, "dc") == 0)
serialWrite (&SP, 1, "-");
else if (strcasecmp (config.testsignal, "1xSlow") == 0)
serialWrite (&SP, 1, "=");
else if (strcasecmp (config.testsignal, "1xFast") == 0)
serialWrite (&SP, 1, "p");
else if (strcasecmp (config.testsignal, "2xSlow") == 0)
serialWrite (&SP, 1, "[");
else if (strcasecmp (config.testsignal, "2xFast") == 0)
serialWrite (&SP, 1, "]");
else if (strcasecmp (config.testsignal, "off") != 0)
{
fprintf (stderr, "Incorrect specification of testsignal\n");
return 1;
}
fprintf (stderr, "openbci2ft: initializing ... ok\n");
printf ("Starting to listen - press CTRL-C to quit\n");
/* register CTRL-C handler */
signal (SIGINT, abortHandler);
/* start streaming data */
serialWrite (&SP, 1, "b");
/* determine the reference time for the timestamps */
if (strcasecmp (config.timeref, "start") == 0)
{
/* since the start of the acquisition */
get_monotonic_time (&tic, TIMESTAMP_REF_BOOT);
}
else if (strcasecmp (config.timeref, "boot") == 0)
{
/* since the start of the day */
tic.tv_sec = 0;
tic.tv_nsec = 0;
}
else if (strcasecmp (config.timeref, "epoch") == 0)
{
/* since the start of the epoch, i.e. 1-1-1970 */
tic.tv_sec = 0;
tic.tv_nsec = 0;
}
else
{
fprintf (stderr,
"Incorrect specification of timeref, should be 'start', 'day' or 'epoch'\n");
return 1;
}
while (keepRunning)
{
sample = 0;
while (sample < config.blocksize)
{
/* wait for the first byte of the following packet */
buf[0] = 0;
while (buf[0] != 0xA0)
{
if (serialInputPending (&SP))
n = serialRead (&SP, 1, buf);
else
usleep (1000);
} /* while */
/*
* Header
* Byte 1: 0xA0
* Byte 2: Sample Number
*
* EEG Data
* Note: values are 24-bit signed, MSB first
* Bytes 3-5: Data value for EEG channel 1
* Bytes 6-8: Data value for EEG channel 2
* Bytes 9-11: Data value for EEG channel 3
* Bytes 12-14: Data value for EEG channel 4
* Bytes 15-17: Data value for EEG channel 5
* Bytes 18-20: Data value for EEG channel 6
* Bytes 21-23: Data value for EEG channel 6
* Bytes 24-26: Data value for EEG channel 8
*
* Accelerometer Data
* Note: values are 16-bit signed, MSB first
* Bytes 27-28: Data value for accelerometer channel X
* Bytes 29-30: Data value for accelerometer channel Y
* Bytes 31-32: Data value for accelerometer channel Z
*
* Footer
* Byte 33: 0xC0
*/
/* read the remaining 32 bytes of the packet */
while (n < OPENBCI_BUFLEN)
if (serialInputPending (&SP))
n += serialRead (&SP, (OPENBCI_BUFLEN - n), buf + n);
else
usleep (1000);
if (verbose > 1)
{
for (i = 0; i < OPENBCI_BUFLEN; i++)
printf ("%02x ", buf[i]);
printf ("\n");
}
chan = 0;
if (ISTRUE (config.enable_chan1))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[2] << 24 | buf[3] << 16 | buf[4] << 8) /
255;
if (ISTRUE (config.enable_chan2))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[5] << 24 | buf[6] << 16 | buf[7] << 8) /
255;
if (ISTRUE (config.enable_chan3))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[8] << 24 | buf[9] << 16 | buf[10] << 8) /
255;
if (ISTRUE (config.enable_chan4))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[11] << 24 | buf[12] << 16 | buf[13] << 8) /
255;
if (ISTRUE (config.enable_chan5))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[14] << 24 | buf[15] << 16 | buf[16] << 8) /
255;
if (ISTRUE (config.enable_chan6))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[17] << 24 | buf[18] << 16 | buf[19] << 8) /
255;
if (ISTRUE (config.enable_chan7))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[20] << 24 | buf[21] << 16 | buf[22] << 8) /
255;
if (ISTRUE (config.enable_chan8))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB1 * (buf[23] << 24 | buf[24] << 16 | buf[25] << 8) /
255;
if (ISTRUE (config.enable_chan9))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB2 * (buf[26] << 24 | buf[27] << 16) / 32767;
if (ISTRUE (config.enable_chan10))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB2 * (buf[28] << 24 | buf[29] << 16) / 32767;
if (ISTRUE (config.enable_chan11))
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
OPENBCI_CALIB2 * (buf[28] << 24 | buf[31] << 16) / 32767;
if (ISTRUE (config.timestamp))
{
if (strcasecmp (config.timeref, "start") == 0)
get_monotonic_time (&toc, TIMESTAMP_REF_BOOT);
else if (strcasecmp (config.timeref, "boot") == 0)
get_monotonic_time (&toc, TIMESTAMP_REF_BOOT);
else if (strcasecmp (config.timeref, "epoch") == 0)
get_monotonic_time (&toc, TIMESTAMP_REF_EPOCH);
((FLOAT32_T *) (data->buf))[nchans * sample + (chan++)] =
get_elapsed_time (&tic, &toc);
}
sample++;
} /* while c<config.blocksize */
count += sample;
printf ("openbci2ft: sample count = %i\n", count);
/* create the request */
request = malloc (sizeof (message_t));
request->def = malloc (sizeof (messagedef_t));
request->buf = NULL;
request->def->version = VERSION;
request->def->bufsize = 0;
request->def->command = PUT_DAT;
request->def->bufsize = append (&request->buf, request->def->bufsize, data->def, sizeof (datadef_t));
request->def->bufsize = append (&request->buf, request->def->bufsize, data->buf, data->def->bufsize);
status = clientrequest (ftSocket, request, &response);
if (verbose > 0)
fprintf (stderr, "openbci2ft: clientrequest returned %d\n", status);
if (status)
{
fprintf (stderr, "openbci2ft: error in %s on line %d\n", __FILE__,
__LINE__);
exit (1);
}
if (status)
{
fprintf (stderr, "openbci2ft: error in %s on line %d\n", __FILE__,
__LINE__);
exit (1);
}
/* FIXME do someting with the response, i.e. check that it is OK */
cleanup_message (&request);
if (response == NULL || response->def == NULL
|| response->def->command != PUT_OK)
{
fprintf (stderr, "Error when writing samples.\n");
}
cleanup_message (&response);
} /* while keepRunning */
/* stop streaming data */
serialWrite (&SP, 1, "s");
cleanup_data (&data);
if (ftSocket > 0)
{
close_connection (ftSocket);
}
else
{
ft_stop_buffer_server (ftServer);
}
return 0;
} /* main */
int main(int argc, char *argv[])
{
int n, i, c, sample = 0, status = 0, verbose = 0;
unsigned char buf[BUFLEN], byte;
SerialPort SP;
host_t host;
/* these represent the acquisition system properties */
int nchans = OPENBCI_NCHANS;
int blocksize = BLOCKSIZE;
float fsample = OPENBCI_FSAMPLE;
/* these are used in the communication with the FT buffer and represent statefull information */
int ftSocket = -1;
ft_buffer_server_t *ftServer;
message_t *request = NULL;
message_t *response = NULL;
header_t *header = NULL;
data_t *data = NULL;
if (argc<2) {
printf(usage);
exit(0);
}
if (argc>2)
strcpy(host.name, argv[2]);
else {
strcpy(host.name, FTHOST);
}
if (argc>3)
host.port = atoi(argv[3]);
else {
host.port = FTPORT;
}
fprintf(stderr, "openbci2ft: device = %s\n", argv[1]);
fprintf(stderr, "openbci2ft: hostname = %s\n", host.name);
fprintf(stderr, "openbci2ft: port = %d\n", host.port);
/* Spawn tcpserver or connect to remote buffer */
if (strcmp(host.name, "-") == 0) {
ftServer = ft_start_buffer_server(host.port, NULL, NULL, NULL);
if (ftServer==NULL) {
fprintf(stderr, "openbci2ft: could not start up a local buffer serving at port %i\n", host.port);
return 1;
}
ftSocket = 0;
printf("openbci2ft: streaming to local buffer on port %i\n", host.port);
}
else {
ftSocket = open_connection(host.name, host.port);
if (ftSocket < 0) {
fprintf(stderr, "openbci2ft: could not connect to remote buffer at %s:%i\n", host.name, host.port);
return 1;
}
printf("openbci2ft: streaming to remote buffer at %s:%i\n", host.name, host.port);
}
/* allocate the elements that will be used in the communication to the FT buffer */
request = malloc(sizeof(message_t));
request->def = malloc(sizeof(messagedef_t));
request->buf = NULL;
request->def->version = VERSION;
request->def->bufsize = 0;
header = malloc(sizeof(header_t));
header->def = malloc(sizeof(headerdef_t));
header->buf = NULL;
data = malloc(sizeof(data_t));
data->def = malloc(sizeof(datadef_t));
data->buf = NULL;
/* define the header */
header->def->nchans = nchans;
header->def->fsample = fsample;
header->def->nsamples = 0;
header->def->nevents = 0;
header->def->data_type = DATATYPE_FLOAT32;
header->def->bufsize = 0;
/* define the constant part of the data and allocate space for the variable part */
data->def->nchans = nchans;
data->def->nsamples = blocksize;
data->def->data_type = DATATYPE_FLOAT32;
data->def->bufsize = WORDSIZE_FLOAT32*nchans*blocksize;
data->buf = malloc(data->def->bufsize);
/* initialization phase, send the header */
request->def->command = PUT_HDR;
request->def->bufsize = append(&request->buf, request->def->bufsize, header->def, sizeof(headerdef_t));
request->def->bufsize = append(&request->buf, request->def->bufsize, header->buf, header->def->bufsize);
/* this is not needed any more */
cleanup_header(&header);
status = clientrequest(ftSocket, request, &response);
if (verbose>0)
fprintf(stderr, "openbci2ft: clientrequest returned %d\n", status);
if (status) {
fprintf(stderr, "openbci2ft: could not send request to buffer\n");
exit(1);
}
if (status || response==NULL || response->def == NULL) {
fprintf(stderr, "openbci2ft: error in %s on line %d\n", __FILE__, __LINE__);
exit(1);
}
cleanup_message(&request);
if (response->def->command != PUT_OK) {
fprintf(stderr, "openbci2ft: error in 'put header' request.\n");
exit(1);
}
cleanup_message(&response);
/* open the serial port */
fprintf(stderr, "openbci2ft: opening serial port ...\n");
if (!serialOpenByName(&SP, argv[1])) {
fprintf(stderr, "Could not open serial port %s\n", argv[1]);
return 1;
}
if (!serialSetParameters(&SP, 115200, 8, 0, 0, 0)) {
fprintf(stderr, "Could not modify serial port parameters\n");
return 1;
}
fprintf(stderr, "openbci2ft: opening serial port ... ok\n");
/* 8-bit board will always be initialized upon opening serial port, 32-bit board needs explicit initialization */
fprintf(stderr, "openbci2ft: initializing ...\n");
serialWrite(&SP, 1, "v");
fprintf(stderr, "openbci2ft: press reset on the OpenBCI board if this takes too long\n");
usleep(1000);
/* wait for '$$$' which indicates that the OpenBCI has been initialized */
c = 0;
while (c!=3) {
n = serialRead(&SP, 1, &byte);
if (n==1) {
if (byte=='$')
c++;
else
c = 0;
}
} /* while waiting for '$$$' */
fprintf(stderr, "openbci2ft: initializing ... ok\n");
printf("Starting to listen - press CTRL-C to quit\n");
/* register CTRL-C handler */
signal(SIGINT, abortHandler);
/* start streaming data */
serialWrite(&SP, 1, "b");
while (keepRunning) {
c = 0;
while (c<blocksize) {
/* wait for the first byte of the packet */
buf[0]=0;
while (buf[0]!=0xA0) {
if (serialInputPending(&SP))
n = serialRead(&SP, 1, buf);
else
usleep(1000);
} /* while */
/* read the remaining 32 bytes of the packet */
while (n<BUFLEN)
if (serialInputPending(&SP))
n += serialRead(&SP, (BUFLEN-n), buf+n);
else
usleep(100000);
if (verbose>1) {
for (i=0; i<BUFLEN; i++)
printf("%02x ", buf[i]);
printf("\n");
}
((FLOAT32_T *)(data->buf))[nchans*c + 0] = OPENBCI_CALIB1 * (buf[ 2]<<24 | buf[ 3]<<16 | buf[ 4]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 1] = OPENBCI_CALIB1 * (buf[ 5]<<24 | buf[ 6]<<16 | buf[ 7]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 2] = OPENBCI_CALIB1 * (buf[ 8]<<24 | buf[ 9]<<16 | buf[10]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 3] = OPENBCI_CALIB1 * (buf[11]<<24 | buf[12]<<16 | buf[13]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 4] = OPENBCI_CALIB1 * (buf[14]<<24 | buf[15]<<16 | buf[16]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 5] = OPENBCI_CALIB1 * (buf[17]<<24 | buf[18]<<16 | buf[19]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 6] = OPENBCI_CALIB1 * (buf[20]<<24 | buf[21]<<16 | buf[22]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 7] = OPENBCI_CALIB1 * (buf[23]<<24 | buf[24]<<16 | buf[25]<<8)/255;
((FLOAT32_T *)(data->buf))[nchans*c + 8] = OPENBCI_CALIB2 * (buf[26]<<24 | buf[27]<<16)/32767;
((FLOAT32_T *)(data->buf))[nchans*c + 9] = OPENBCI_CALIB2 * (buf[28]<<24 | buf[29]<<16)/32767;
((FLOAT32_T *)(data->buf))[nchans*c +10] = OPENBCI_CALIB2 * (buf[28]<<24 | buf[31]<<16)/32767;
c++;
} /* while c<blocksize */
sample += blocksize;
printf("openbci2ft: sample count = %i\n", sample);
/*
* Header
* Byte 1: 0xA0
* Byte 2: Sample Number
*
* EEG Data
* Note: values are 24-bit signed, MSB first
* Bytes 3-5: Data value for EEG channel 1
* Bytes 6-8: Data value for EEG channel 2
* Bytes 9-11: Data value for EEG channel 3
* Bytes 12-14: Data value for EEG channel 4
* Bytes 15-17: Data value for EEG channel 5
* Bytes 18-20: Data value for EEG channel 6
* Bytes 21-23: Data value for EEG channel 6
* Bytes 24-26: Data value for EEG channel 8
*
* Accelerometer Data
* Note: values are 16-bit signed, MSB first
* Bytes 27-28: Data value for accelerometer channel X
* Bytes 29-30: Data value for accelerometer channel Y
* Bytes 31-32: Data value for accelerometer channel Z
*
* Footer
* Byte 33: 0xC0
*/
/* create the request */
request = malloc(sizeof(message_t));
request->def = malloc(sizeof(messagedef_t));
request->buf = NULL;
request->def->version = VERSION;
request->def->bufsize = 0;
request->def->command = PUT_DAT;
request->def->bufsize = append(&request->buf, request->def->bufsize, data->def, sizeof(datadef_t));
request->def->bufsize = append(&request->buf, request->def->bufsize, data->buf, data->def->bufsize);
status = clientrequest(ftSocket, request, &response);
if (verbose>0)
fprintf(stderr, "openbci2ft: clientrequest returned %d\n", status);
if (status) {
fprintf(stderr, "openbci2ft: error in %s on line %d\n", __FILE__, __LINE__);
exit(1);
}
if (status) {
fprintf(stderr, "openbci2ft: error in %s on line %d\n", __FILE__, __LINE__);
exit(1);
}
/* FIXME do someting with the response, i.e. check that it is OK */
cleanup_message(&request);
if (response == NULL || response->def == NULL || response->def->command!=PUT_OK) {
fprintf(stderr, "Error when writing samples.\n");
}
cleanup_message(&response);
} /* while keepRunning */
/* stop streaming data */
serialWrite(&SP, 1, "s");
cleanup_data(&data);
if (ftSocket > 0) {
close_connection(ftSocket);
} else {
ft_stop_buffer_server(ftServer);
}
return 0;
} /* main */