EMG click

EMG click measures the electrical activity produced by the skeletal muscles. It carries MCP609 operational amplifier and MAX6106 micropower voltage reference.

click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2021.
• Type : ADC type

Software Support

We provide a library for the EMG 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 EMG Click driver.

Standard key functions :

• emg_cfg_setup Config Object Initialization function.

  void emg_cfg_setup ( emg_cfg_t *cfg );

• emg_init Initialization function.

  err_t emg_init ( emg_t *ctx, emg_cfg_t *cfg );

Example key functions :

• emg_read_an_pin_value EMG read AN pin value function.

  err_t emg_read_an_pin_value ( emg_t *ctx, uint16_t *data_out );

• emg_read_an_pin_voltage EMG read AN pin voltage level function.

  err_t emg_read_an_pin_voltage ( emg_t *ctx, float *data_out );

Example Description

This is an example which demonstrates the use of EMG Click board.

The demo application is composed of two sections :

Application Init

Initializes ADC and timer counter.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    emg_cfg_t emg_cfg;  /**< Click config object. */

    /** 
     * 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.
    emg_cfg_setup( &emg_cfg );
    EMG_MAP_MIKROBUS( emg_cfg, MIKROBUS_1 );
    if ( ADC_ERROR == emg_init( &emg, &emg_cfg ) ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    time = 0;
    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 emg_an = 0;
    if ( emg_read_an_pin_value( &emg, &emg_an ) == ADC_SUCCESS ){
        log_printf( &logger, " %u,%lu\r\n ", emg_an, time );
    }
    time += 5;
    Delay_ms ( 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.EMG

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.