battmon

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BATT-MON Click

BATT-MON Click is a very versatile, high accuracy, multiple-chemistry battery gauge for applications single-cell batteries.

Click Product page

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Click library

• Author : MikroE Team
• Date : Jan 2020.
• Type : I2C type

Software Support

We provide a library for the BattMon 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for BattMon Click driver.

Standard key functions :

• Config Object Initialization function.

void battmon_cfg_setup ( battmon_cfg_t *cfg );

• Initialization function.

BATTMON_RETVAL battmon_init ( battmon_t *ctx, battmon_cfg_t *cfg );

• Click Default Configuration function.

void battmon_default_cfg ( battmon_t *ctx );

Example key functions :

• Data Get function

float battmon_get_data ( battmon_t *ctx, uint8_t data_addr );

• ALM Pin Get function

uint8_t battmon_get_alm_pin ( battmon_t *ctx );

• Conversion Counter Reset function

void battmon_reset_conv_cnt ( battmon_t *ctx );

Examples Description

This application is battery charger.

The demo application is composed of two sections :

Application Init

Initializes I2C serial interface, reads the part ID and performs a device configuration and alarm setting.

void application_init ( void )
{
    log_cfg_t log_cfg;
    battmon_cfg_t 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.

    battmon_cfg_setup( &cfg );
    BATTMON_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    battmon_init( &battmon, &cfg );

    Delay_ms ( 500 );

    battmon_read_bytes( &battmon, BATTMON_REG_ID, &reg_read, 1 );
    log_printf( &logger, " ** Part ID: 0x%d \r\n", (uint16_t) reg_read );

    battmon_default_cfg( &battmon );
    
    log_printf( &logger, "** BattMon initialization done ** \r\n" );
    log_printf( &logger, "********************************* \r\n" );
}
  

Application Task

Checks the conversion counter value and when conversion was done reads data calculated to the properly unit and checks the alarm status. All results will be sent to the uart terminal.

void application_task ( void )
{
    char cels_symbol[ 3 ] = { 176, 'C', 0 };
    float data_read;
    uint16_t conv_cnt;

    conv_cnt = battmon_get_data( &battmon, BATTMON_REG_COUNTER );

    if ( ( ( conv_cnt % 4 ) == 0 ) && ( conv_cnt > 0 ) )
    {
        data_read = battmon_get_data( &battmon, BATTMON_REG_SOC );
        log_printf( &logger, "** Gas Gauge Relative SOC : %.2f %% \r\n ", data_read );
    
        data_read = battmon_get_data( &battmon, BATTMON_REG_CURRENT );
        log_printf( &logger, "** Battery Current : %.2f mA \r\n", data_read );

        
        data_read = battmon_get_data( &battmon, BATTMON_REG_VOLTAGE );
        log_printf( &logger, "** Battery Voltage : %.2f mV \r\n", data_read );
        
        if ( ( conv_cnt % 16 ) == 0 )
        {
            data_read = battmon_get_data( &battmon, BATTMON_REG_TEMPERATURE );
            battmon_reset_conv_cnt( &battmon );
            log_printf( &logger, "** Temperature :  %.2f %s\r\n", data_read, cels_symbol );
        }
        
        reg_read = battmon_check_clear_alarm( &battmon );

        if ( ( reg_read & BATTMON_ALM_SOC_DET_MASK ) != BATTMON_LOG_LOW )
        {
            log_printf( &logger,  "** Low-SOC Condition! \r\n" );
        }
        if ( ( reg_read & BATTMON_ALM_VOLT_DET_MASK ) != BATTMON_LOG_LOW )
        {
            log_printf( &logger,  "** Low-Voltage Condition! \r\n" ); 
        }
        
        log_printf( &logger, "********************************* \r\n" );
        Delay_ms ( 1000 );
    }
    else
    {
        Delay_ms ( 200 );
    }
}

Note

Voltage and current conversion will be done after 4 seconds. Temperature conversion will be done after 16 seconds. After temperature reading the conversion counter will be cleared. Clearing the alarm while the corresponding low-voltage or low-SOC condition is still in progress does not generate another interrupt. This condition must disappear first and must be detected again before another interrupt (ALM pin driven low or alarm interrupt bits are set high) is generated for this alarm. Another alarm condition, if not yet triggered, can still generate an interrupt. Input voltage must be in the range from 2.7V to 4.5V. Maximal battery current is 5A.

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.BattMon

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.

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