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ECG GSR Click

ECG GSR Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

Click Library

  • Author : MikroE Team
  • Date : Jan 2021.
  • Type : I2C type

Software Support

Example Description

This Click is made for PPG, ECG and GSR, equipped with an ultra-low power, multi channel, integrated biopotential AFE and EFE.

Example Libraries

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.ECGGSR

Example Key Functions

  • ecggsr_cfg_setup Config Object Initialization function.
void ecggsr_cfg_setup ( ecggsr_cfg_t *cfg );
  • ecggsr_init Initialization function.
err_t ecggsr_init( ecggsr_t *ctx, ecggsr_cfg_t* cfg );
  • ecggsr_default_cfg Click Default Configuration function.
void ecggsr_default_cfg( ecggsr_t *ctx, ecggsr_cfg_t *cfg );
  • ecggsr_read_reg Function performs reading of an ID of the device.
err_t ecggsr_read_reg( ecggsr_t *ctx, uint8_t register_address, uint8_t *data_out, uint8_t num_of_regs );
  • ecggsr_write_reg Function writes 8-bit data to the register.
err_t ecggsr_write_reg( ecggsr_t *ctx, uint8_t register_address, uint8_t transfer_data );
  • ecggsr_reset Function performs the SW reset of the device and waits until the device returns back to normal state.
void ecggsr_reset( ecggsr_t *ctx );

Application Init

Initializes driver, performs SW reset of all the registers, which puts the registers in their initial state.

void application_init ( void )
{
    log_cfg_t log_cfg;
    
    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );
    
    //  Click initialization.
    ecggsr_cfg_setup( &ecggsr_cfg );
    ECGGSR_MAP_MIKROBUS( ecggsr_cfg, MIKROBUS_1 );
    ecggsr_init( &ecggsr, &ecggsr_cfg );
    Delay_1sec();
    ecggsr_default_cfg( &ecggsr, &ecggsr_cfg );
    Delay_1sec();
}

Application Task

Depending on the user selection, application measures:

  1. value of oxygen level in human's blood or
  2. heartrate or
  3. galvanic skin response
void application_task( void )
{
    // ------------------------------------------------------------
    // Check the presence of the ECG GSR Click by reading device ID.
    // ------------------------------------------------------------
    ecggsr_read_dev_id( &ecggsr, &dev_id );
    if ( ECGGSR_DEV_ID == dev_id  )
    {
        // ------------------------------------------------------------
        // Enable desired functionality of the ECG GSR Click.
        // ------------------------------------------------------------
        if ( ENABLE_OXIMETER_FUNCTIONALITY == ecggsr_cfg.click_functionality )
        {
            ecggsr_get_oxy_saturation( );
        } 
        else if ( ENABLE_HEARTRATE_FUNCTIONALITY == ecggsr_cfg.click_functionality )
        {
            ecggsr_get_heartrate( );
        } 
        else if ( ENABLE_GALVANIC_SKIN_RESPONSE_FUNCTIONALITY == ecggsr_cfg.click_functionality )
        {
            ecggsr_get_gal_skin_resp( );
        } 
    }
}

Application Output

This Click board can be interfaced and monitored in two ways:

  • Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
  • UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.