TIMER Click

How does it work?

Timer Click is based on the DS1682, a total-elapsed-time recorder with an alarm from Analog Devices. This IC is an integrated ETC, factory-calibrated, and temperature-compensated RC time base, accurate to 2% (typical), eliminating the need for an external crystal. The DS1682 can detect and record the number of events and the total cumulative event time since the last reset to 0. After the Power-Up sequence, the data is transferred from the EEPROM into the counters and registers where data can be read and written. The data from the counters and registers are written to the EEPROM when the event occurs.

The Timer Click communicates with the host microcontroller using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard mode (100KHz) and Fast mode (400KHz) operation. The event EVT pin is the input pin of the DS1682 and monitors when an event occurs. With logic HIGH on this pin, the contents from the EEPROM are transferred to the ETC, and the ETC counter starts to count in quarter-second increments. With logic LOW, event counter increments and the data are stored in the EEPROM array. When the EVT pin changes states, the I2C is unavailable for communications. The ALM is an alarm output pin and is active LOW. When the ETC matches the alarm value, the alarm flag (AF) is set, and once set, it can not be reset. The alarm flag is one-time programmable.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Specifications

Pinout diagram

This table shows how the pinout on TIMER Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	ALM	Alarm
Event Detection	EVT	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

TIMER Click electrical specifications

Software Support

We provide a library for the Timer Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Timer Click driver.

Key functions

• Get elapsed time counter (ETC) data function

• Get elapsed time counter (ETC) seconds function

• Set elapsed time counter (ETC) time function

Example Description

This application is multifunctional 3-axis digital accelerometer that can also be configured as a 45-degree Tilt sensor.

 void application_task ( ) 
 { 
     static uint8_t time_seconds_new = 0xFF; 
     uint8_t time_hours; 
     uint8_t time_minutes; 
     uint8_t time_seconds; 
     uint16_t time_days; 

     timer_get_time( &timer, &time_days, &time_hours, &time_minutes, &time_seconds ); 

     if ( time_seconds_new != time_seconds ) 
     { 
         log_printf 
         (  
             &logger, " %d days    %d:%d:%d rn",  
             time_days,  
             time_hours,  
             time_minutes,  
             time_seconds 
         ); 
         log_printf( &logger, "------------------rn" ); 
         time_seconds_new = time_seconds; 
     } 
     Delay_ms( 1 ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Timer

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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK - MIKROE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.