eeg  2.0.0.0
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EEG click

EEG Click is a Click boardâ„¢ that allows monitoring of brain activity. Although not suitable for clinical examination, it is quite sufficient to allow some insight into brain activity. EEG click is equipped with a high-sensitivity circuit which amplifies faint electrical signals from the brain, allowing them to be sampled by a host MCU.

click Product page


Click library

  • Author : Jelena Milosavljevic
  • Date : Aug 2021.
  • Type : ADC type

Software Support

We provide a library for the EEG Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for EEG Click driver.

Standard key functions :

Example key functions :

  • eeg_read_an_pin_value This function reads results of AD conversion of the AN pin.
    err_t eeg_read_an_pin_value ( eeg_t *ctx, uint16_t *data_out );
  • eeg_read_an_pin_voltage This function reads results of AD conversion of the AN pin and converts them to proportional voltage level.
    err_t eeg_read_an_pin_voltage ( eeg_t *ctx, float *data_out );

Example Description

This example demonstrates the use of EEG Click board.

The demo application is composed of two sections :

Application Init

Initializes Click board.

void application_init ( void )
{
log_cfg_t log_cfg;
eeg_cfg_t eeg_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
log_printf( &logger, " ----------------------------------------------\r\n" );
log_printf( &logger, " ***EEG click*** \r\n" );
log_printf( &logger, "----------------------------------------------\r\n" );
Delay_ms( 2000 );
// Click initialization.
eeg_cfg_setup( &eeg_cfg );
EEG_MAP_MIKROBUS( eeg_cfg, MIKROBUS_1 );
if ( ADC_ERROR == eeg_init( &eeg, &eeg_cfg ) ){
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

Reads ADC value and sends results on serial plotter every 5 ms.

void application_task ( void )
{
uint16_t eeg_an_value = 0;
if ( eeg_read_an_pin_value( &eeg, &eeg_an_value ) != ADC_ERROR ) {
log_printf( &logger, " %u,%lu\r\n", eeg_an_value, time );
Delay_ms( 5 );
time += 5;
}
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.EEG

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.


eeg_read_an_pin_voltage
err_t eeg_read_an_pin_voltage(eeg_t *ctx, float *data_out)
EEG read AN pin voltage level function.
eeg_init
err_t eeg_init(eeg_t *ctx, eeg_cfg_t *cfg)
EEG initialization function.
eeg_read_an_pin_value
err_t eeg_read_an_pin_value(eeg_t *ctx, uint16_t *data_out)
EEG read AN pin value function.
application_task
void application_task(void)
Definition: main.c:62
eeg_cfg_setup
void eeg_cfg_setup(eeg_cfg_t *cfg)
EEG configuration object setup function.
eeg_t
EEG Click context object.
Definition: eeg.h:80
application_init
void application_init(void)
Definition: main.c:28
time
uint32_t time
Definition: main.c:26
eeg_cfg_t
EEG Click configuration object.
Definition: eeg.h:90
EEG_MAP_MIKROBUS
#define EEG_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: eeg.h:69