The bbt_device_data_block_t class. More...

#include <bbt_device.h>

Data Fields
unsigned short	sequence
short	battery
unsigned short	flags
double *	signal_data [10]
unsigned short *	impedances

Detailed Description

The bbt_device_data_block_t class.

A device data block is generated and communicated at a fixed frequency (bbt_device_get_frequency) by the device. Each block contains a unique[1] consecutive sequence, the battery level, a flag that inidicates any problem and the data from the differrent signals.

The data is separated per signal. So, the data of the signal with index i in the device_signals array obtained from bbt_device_get_signals, is in the signal_data[i] array of doubles. Inside each signal data array, the values are arranged in a channels x samples matrix, as is the bbt_device_signal_t struct. First, all the samples from channel 1, then all the samples from channel 2, etc. If the signal is not enabled, the pointer to the data of the signal is set to 0. If an eeg signal is returned, the corresponding contact impedance/quality measurement is available in the impedances field.

[1] The sequence wraps after 2^16 data blocks and goes back to 0 again.

Field Documentation

◆ sequence

unsigned short bbt_device_data_block_t::sequence

The number of sequence of the data block. They are consecutive and wrap around at 2**16

◆ battery

short bbt_device_data_block_t::battery

The remaining battery (see Battery level constants)

◆ flags

unsigned short bbt_device_data_block_t::flags

A flag set inidicating any problem during acquisition. 0 if no problem occur

◆ signal_data

double* bbt_device_data_block_t::signal_data[10]

The table of data per signal

◆ impedances

unsigned short* bbt_device_data_block_t::impedances

If EEG is being acquired, this list is the quality per channel (see EEG impedance/quality values)

The documentation for this struct was generated from the following file:

C:/Users/Pablo/dev/releases/2.8.3/bbt_sdk/headers/bbt/bbt_device.h