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mikroSDK Library

Timer click

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Author: MikroElektronika Team

Last Updated: 2019-03-14

Category: Timers (Real time clock)

Downloaded: 876 times

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Timer click is a mikroBUS add-on board with Maxim’s DS1682 total elapsed time recorder. It holds an elapsed time counter (ETC) in conjunction with the ALARM pin. The alarm flag is one time programmable. The board communicates through I2C interface, with two additional pins: ALARM and EVENT. It uses either a 3.3V or a 5V power supply only.

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mikroSDK Library Blog

Timer Click

Timer Click

Front and back view of the Timer Click board

View full image

Library Description

The library covers all the necessary functions to control Timer Click board. Timer click communicates with the target board via I2C protocol. This library contains drivers to write and reads data from DS1682 total elapsed time recorder, the function for set/gets ETC, EC, alarm seconds, for reading/write EEPROM memory, etc.

Key functions:

  • void timer_setETCData( uint32_t etcValue ) - Set elapsed time counter (ETC) data function.
  • void timer_getTime( uint16_t *timeDays, uint8_t *timeHours, uint8_t *timeMinutes, uint8_t *timeSeconds ) - Get elapsed time counter (ETC) time function.
  • void timer_setAlarmSeconds( uint32_t alarmSeconds ) - Set alarm seconds function.

Examples description

The application is composed of three sections:

  • System Initialization - Initializes GPIO, I2C and LOG structures, sets RST pin as output and INT pin as input.
  • Application Initialization -  Initialization driver enables - I2C, soft reset, sets ETC and EC start ( seconds ), hardware reset and start write log.
  • Application Task - (code snippet) This is an example which demonstrates the use of Timer Click board. Timer Click communicates with register via I2C by writing to register and read from the register, display time ( days, hours, minutes and seconds ) which we received reading from the target register address of DS1682 total elapsed time recorder. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes for every 1 sec.
void applicationTask() 
{
    timer_getTime( &timeDays, &timeHours, &timeMinutes, &timeSeconds );
    
    if ( timeSecondsNew != timeSeconds )
    {
        mikrobus_logWrite( " ", _LOG_TEXT );
        displayLogUart( timeDays );
        mikrobus_logWrite( " days ", _LOG_TEXT );

        displayLogUart( timeHours );
        mikrobus_logWrite( ":", _LOG_TEXT );

        displayLogUart( timeMinutes ); 
        mikrobus_logWrite( ":", _LOG_TEXT );

        displayLogUart( timeSeconds );  
        mikrobus_logWrite( "", _LOG_LINE );
        mikrobus_logWrite( "------------------", _LOG_LINE );

        timeSecondsNew = timeSeconds;
    }
    
    Delay_1ms();
}

Additional Functions :

  • void displayLogUart( uint8_t value ) - Write the value of time or date as a two-digit number.

Other mikroE Libraries used in the example:

  • I2C
  • UART​
  • Conversion

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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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