opencnvdriver.c File Reference

#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <nsnet.h>
#include <nsutil.h>
#include <nsser.h>
#include <openedf.h>
#include <config.h>

Go to the source code of this file.

Defines
#define	PROTOWINDOW   12
	neuroserver network support neuroserver serial port support european data format support (e.g. header structures) release number support size of a serial packet
#define	MINGOOD   6
Functions
int	isValidPacket (unsigned short nchan, long *samples)
	checks data packet for validity (range)
int	doesMatchOpenCNV (unsigned char c, long *vals)
	function for frame decoding
int	mGetOK (sock_t fd, struct InputBuffer *ib)
	get neuroserver response
void	eatCharacter (unsigned char c)
	this function does the real data processing of serial input data
void	handleSamples (int packetCounter, int chan, long *vals)
	sends sample values to the nsd daemon.
void	printHelp ()
	prints command line options / brief description of the program
void	decodeCommand (char command[MAXLEN], ser_t serport)
int	main (int argc, char **argv)
Variables
char	buf [PROTOWINDOW]
	serial port input buffer
sock_t	sock_fd
	handler for network socket
int	bufCount
int	hasMatchedProtocol
	protocol detection
int	isOpenCNV
	eeg device detection
int	isPseudoEDF
	if the -m switch is set, isPseudoEDF is set to 1 and 24bit data is splitted into 2 16bit channels

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Detailed Description

Author:

Moritz von Buttlar (moritzvb@users.sf.net), based on the modeegdriver by Rudi Cilibrasi

Device driver for the 24bit OpenCNV EEG.

Definition in file opencnvdriver.c.

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Define Documentation

#define MINGOOD   6

#define PROTOWINDOW   12

neuroserver network support neuroserver serial port support european data format support (e.g. header structures) release number support size of a serial packet Definition at line 48 of file opencnvdriver.c.

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Function Documentation

void decodeCommand (  char  command[MAXLEN], ser_t  serport )

Definition at line 314 of file opencnvdriver.c. References rprintf(), and writeSerial(). Referenced by main().

int doesMatchOpenCNV (  unsigned char  c, long *  vals )

function for frame decoding state machine for serial protocol decoding, get's called with every new character that has been received returns 1 if everything is fine, 0 if there has been some problem (e.g. data lost, frame not aligned right) < don't check ADC Ch1 status < don't check ADC Ch2 status < get stimulus value Definition at line 233 of file opencnvdriver.c. References handleSamples(), PROTOWINDOW, rexit(), and rprintf(). Referenced by eatCharacter().

void eatCharacter (  unsigned char  c  )

this function does the real data processing of serial input data number of frames until protocol is locked in place to store eeg data has the protocol been detected and validated ? not yet, or error previously now it detected the frame, from now on the protocol is fixed check packet for validity ok, didmatch is 0, so it didn't match so far Definition at line 146 of file opencnvdriver.c. References doesMatchOpenCNV(), hasMatchedProtocol, MAXCHANNELS, PROTOWINDOW, and rprintf(). Referenced by main().

void handleSamples (  int  packetCounter, int  chan, long *  vals )

sends sample values to the nsd daemon. chan Samples, stored in the long array *vals, will be send. The packetCounter information can be used by the application software to check for lost packets. < network socket buffer Definition at line 210 of file opencnvdriver.c. References buf, ib, MAXLEN, mGetOK(), sock_fd, and writeString().

int isValidPacket (  unsigned short  chan, long *  samples )

checks data packet for validity (range) Todo: get maximum digital value from header Definition at line 133 of file opencnvdriver.c. Referenced by eatCharacter().

int main (  int  argc, char **  argv )

DEFAULTHOST DEFAULTPORT now start talking with the nsd send header process serial port input data code to get commands from server Definition at line 339 of file opencnvdriver.c. References EDFDecodedConfig::chan, current, EDFDecodedHeader::dataRecordSeconds, decodeCommand(), DEFAULTDEVICE, DEFAULTHOST, DEFAULTPORT, eatCharacter(), EDFPacket, getDMY(), getHMS(), EDFDecodedConfig::hdr, ib, isEOF(), isPseudoEDF, max_fd, MAXHEADERLEN, MAXLEN, mGetOK(), my_read(), openSerialPort(), OSTYPESTR, printHelp(), PROTOWINDOW, rconnectName(), InputBuffer::read_buf, InputBuffer::read_cnt, readSerial(), EDFDecodedHeader::recordingStartDate, EDFDecodedHeader::recordingStartTime, rexit(), rinitNetworking(), rprintf(), rselect_timed(), rsocket(), EDFDecodedChannelHeader::sampleCount, ser_t, setblocking(), setEDFHeaderBytes(), sock_fd, updateMaxFd(), writeBytes(), writeEDFString(), and writeString().

int mGetOK (  sock_t  fd, struct InputBuffer *  ib )

get neuroserver response Referenced by handleSamples(), and main().

void printHelp (   )

prints command line options / brief description of the program Definition at line 301 of file opencnvdriver.c. References DEFAULTDEVICE, DEFAULTHOST, DEFAULTPORT, and rprintf().

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Variable Documentation

char buf[PROTOWINDOW]

serial port input buffer Definition at line 52 of file opencnvdriver.c.

int bufCount

Definition at line 55 of file opencnvdriver.c.

int hasMatchedProtocol

protocol detection Definition at line 62 of file opencnvdriver.c.

int isOpenCNV

eeg device detection Definition at line 64 of file opencnvdriver.c.

int isPseudoEDF

if the -m switch is set, isPseudoEDF is set to 1 and 24bit data is splitted into 2 16bit channels Definition at line 66 of file opencnvdriver.c. Referenced by main().

sock_t sock_fd

handler for network socket Definition at line 54 of file opencnvdriver.c.

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