RTC 11 click

RTC 11 Click is a compact add-on board that contains a real-time clock IC designed to maximize battery life and reduce overall battery requirements in wearable applications. This board features the AB0815, an ultra-low-power coupled with a highly sophisticated feature set the real-time clock from Abracon LLC.

click Product page

Click library

• Author : Stefan Ilic
• Date : Jul 2021.
• Type : SPI type

Software Support

We provide a library for the RTC11 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 RTC11 Click driver.

Standard key functions :

• rtc11_cfg_setup Config Object Initialization function.

  void rtc11_cfg_setup ( rtc11_cfg_t *cfg );

• rtc11_init Initialization function.

  err_t rtc11_init ( rtc11_t *ctx, rtc11_cfg_t *cfg );

Example key functions :

• rtc11_set_time Set time hours, minutes and seconds function

  err_t rtc11_set_time ( rtc11_t *ctx, rtc11_time_t rtc_time );

• rtc11_get_time Get time hours, minutes and seconds function

  void rtc11_get_time ( rtc11_t *ctx, rtc11_time_t *rtc_time );

• rtc11_set_date Set date day of the week, day, month and year function

  err_t rtc11_set_date ( rtc11_t *ctx, rtc11_date_t rtc_date );

Example Description

This is an example that demonstrates the use of the RTC 11 click board.

The demo application is composed of two sections :

Application Init

Initalizes SPI, performs software reset, sets system time and date, and starts clocking system.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    rtc11_cfg_t rtc11_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.

    rtc11_cfg_setup( &rtc11_cfg );
    RTC11_MAP_MIKROBUS( rtc11_cfg, MIKROBUS_1 );
    err_t init_flag  = rtc11_init( &rtc11, &rtc11_cfg );
    if ( SPI_MASTER_ERROR == init_flag ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    log_printf( &logger,"------------------------\r\n" );
    log_printf( &logger," Software reset \r\n" );
    rtc11_soft_rst( &rtc11 );
    Delay_ms ( 100 );

    time.hours = 23;
    time.min = 59;
    time.sec = 55;
    log_printf( &logger,"------------------------\r\n" );
    log_printf( &logger," Setting time: %.2d:%.2d:%.2d \r\n", ( uint16_t ) time.hours, ( uint16_t ) time.min, ( uint16_t ) time.sec );
    rtc11_set_time ( &rtc11, time );
    Delay_ms ( 100 );

    date.day_of_week = 0;
    date.day = 19;
    date.month = 7;
    date.year = 21;
    log_printf( &logger,"------------------------\r\n" );
    log_printf( &logger," Setting date: %.2d/%.2d/%.2d \r\n", ( uint16_t ) date.day, ( uint16_t ) date.month, ( uint16_t ) date.year );
    rtc11_set_date( &rtc11, date );
    Delay_ms ( 100 );

    rtc11_stp_sys_slk ( &rtc11, RTC11_PROP_DIS );
    log_info( &logger, " Application Task " );
    log_printf( &logger,"------------------------\r\n" );
}

Application Task

Demonstrates use of RTC 11 click board by reading and displaying time and date via USART terminal.

void application_task ( void ) {
    rtc11_get_time ( &rtc11, &time );
    Delay_ms ( 10 );
    rtc11_get_date ( &rtc11, &date );
    Delay_ms ( 10 );

    if ( sec_flag != time.sec ) {
        log_printf( &logger, " Date: " );
        disp_day_of_the_week( date.day_of_week );
        log_printf( &logger, " %.2d/%.2d/20%.2d \r\n", ( uint16_t ) date.day, ( uint16_t ) date.month, ( uint16_t ) date.year );
        log_printf( &logger, " Time: %.2d:%.2d:%.2d \r\n", ( uint16_t ) time.hours, ( uint16_t ) time.min, ( uint16_t ) time.sec );
        log_printf( &logger,"--------------------------\r\n" );
    }
    sec_flag = time.sec;
}

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.RTC11

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.