Charger 26 Click

Charger 26 Click is a compact add-on board that provides a single-cell charging solution. This board features the MAX1811, a USB-powered Li+ charger from Analog Devices. The charger uses an internal FET to deliver the battery up to 500mA charging current. It has pre-conditioning that soft-starts a near-dead battery cell before charging.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2023.
• Type : GPIO type

Software Support

We provide a library for the Charger 26 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 Charger 26 Click driver.

Standard key functions :

• charger26_cfg_setup Config Object Initialization function.

  void charger26_cfg_setup ( charger26_cfg_t *cfg );

• charger26_init Initialization function.

  err_t charger26_init ( charger26_t *ctx, charger26_cfg_t *cfg );

• charger26_default_cfg Click Default Configuration function.

  void charger26_default_cfg ( charger26_t *ctx );

Example key functions :

• charger26_set_vsel Charger 26 select charger voltage function.

  void charger26_set_vsel ( charger26_t *ctx, uint8_t vout_sel );

• charger26_set_isel Charger 26 select charger current function.

  void charger26_set_isel ( charger26_t *ctx, uint8_t iout_sel );

• charger26_get_chg_state Charger 26 chg pin reading function.

  uint8_t charger26_get_chg_state ( charger26_t *ctx );

Example Description

This example demonstrates the use of Charger 26 Click board by enabling the device and then reading and displaying the charger status.

The demo application is composed of two sections :

Application Init

Initializes the driver and enables the device, sets the output voltage to 4.2 V and charging current to 100 mA.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    charger26_cfg_t charger26_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.
    charger26_cfg_setup( &charger26_cfg );
    CHARGER26_MAP_MIKROBUS( charger26_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == charger26_init( &charger26, &charger26_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    charger26_default_cfg ( &charger26 );
    Delay_ms ( 1000 );

    log_printf( &logger, " Connect input power and battery. \r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    log_printf( &logger, " Enableing output. \r\n" );
    charger26_enable_output ( &charger26, CHARGER26_ENABLE_OUTPUT );

    while ( CHARGER26_PIN_STATE_LOW != charger26_get_chg_state( &charger26 ) )
    {
        log_printf( &logger, " Check connection. \r\n" );
        Delay_ms ( 1000 );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Tracking charging status, as soon as charging stops, device output is disabled.

void application_task ( void ) 
{
    if ( CHARGER26_PIN_STATE_LOW == charger26_get_chg_state( &charger26 ) )
    {
        log_printf( &logger, " Battery is charging. \r\n" );
    }
    else
    {
        log_printf( &logger, " Battery isn't charging, disabling output. \r\n" );
        charger26_enable_output ( &charger26, CHARGER26_DISABLE_OUTPUT );
        for ( ; ; );
    }
    Delay_ms ( 1000 );
}

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.Charger26

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.