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README.md

DS3231M - RTC 10 Click (Mikroe)

Summary

This example project shows an example of Mikroe RTC 10 Click board driver integration with the Silicon Labs Platform.

RTC 10 Click is a real-time clock module which has an extremely low power consumption, allowing it to be used with a single button cell battery, for an extended period of time. It features the DS3231M, a low-cost, extremely accurate, I2C real-time clock (RTC) from Analog Devices. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the microelectromechanical systems (MEMS) resonator enhances the long-term accuracy of the device and reduces the piecepart count in a manufacturing line.

This example can be used to demonstrate the capability of maintaining timekeeping of the Mikroe RTC 10 Click board.

Required Hardware

Hardware Connection

  • If the EFR32xG24 Explorer Kit is used:

    The RTC Click board supports MikroBus, so it can connect easily to EFR32xG24 Explorer Kit via MikroBus header. Assure that the board's 45-degree corner matches the Explorer Kit's 45-degree white line.

    hardware_connection

  • If the SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash SoC Pro Kit is used:

    The hardware connection is shown in the table below:

    Description BRD4338 BRD4002 Breakout Mikroe RTC 10 Click
    I2C_SDA ULP_GPIO_6 EXP_16 SDA
    I2C_SCL ULP_GPIO_7 EXP_15 SCL
    Reset Out GPIO_46 P24 RST
    Analog ECG signal OUT GPIO_47 P26 AN
    Interrupt OUT GPIO_48 P28 INT

Setup

You can either create a project based on an example project or start with an empty example project.

Create a project based on an example project

  1. From the Launcher Home, add your device to My Products, click on it, and click on the EXAMPLE PROJECTS & DEMOS tab. Find the example project filtering by rtc.

  2. Click Create button on the Third Party Hardware Drivers - DS3231M - RTC10 Click (Mikroe) example. Example project creation dialog pops up -> click Create and Finish and Project should be generated.

    create_example

  3. Build and flash this example to the board.

Start with an empty example project

  1. Create an "Empty C Project" for the your board using Simplicity Studio v5. Use the default project settings.

  2. Copy the app.c file (located in the app/example/mikroe_rtc10_ds3231m folder) into the project root folder (overwriting existing file).

  3. Install the software components:

    • Open the .slcp file in the project.

    • Select the SOFTWARE COMPONENTS tab.

    • Install the following components:

      If the EFR32xG24 Explorer Kit is used:

      • [Services] → [Timers] → [Sleep Timer]
      • [Services] → [IO Stream] → [IO Stream: USART] → default instance name: vcom
      • [Application] → [Utility] → [Log]
      • [Third Party Hardware Drivers] → [Clock & Timing] → [DS3231M - RTC 10 Click (Mikroe)] → use default configuration

      If the SiWx917 Wi-Fi 6 and Bluetooth LE 8 MB Flash SoC Pro Kit is used:

      • [WiSeConnect 3 SDK] → [Device] → [Si91x] → [MCU] → [Service] → [Sleep Timer for Si91x]
      • [WiSeConnect 3 SDK] → [Device] → [Si91x] → [MCU] → [Peripheral] → [I2C] → [i2c2]
      • [Third Party Hardware Drivers] → [Clock & Timing] → [DS3231M - RTC 10 Click (Mikroe)] → use default configuration

  4. Install printf float

    • Open Properties of the project.

    • Select C/C++ Build > Settings > Tool Settings >GNU ARM C Linker > General. Check Printf float.

      float

  5. Build and flash this example to the board.

Note:

  • Make sure that the Third Party Hardware Drivers extension is installed. If not, follow this documentation.

  • Third-party Drivers Extension must be enabled for the project to install the DS3231M - RTC 10 Click (Mikroe) component.

How It Works

Driver Layer Diagram

software_layer

Testing

This example sets time and date for the RTC Click in the initialization step. And then it starts tracking the time and display it every one second. The temperature is displayed every 60 seconds.

You can launch Console that's integrated into Simplicity Studio or use a third-party terminal tool like TeraTerm to receive the data from the USB. A screenshot of the console output is shown in the figure below.

console_log

Report Bugs & Get Support

To report bugs in the Application Examples projects, please create a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo. Please reference the board, project, and source files associated with the bug, and reference line numbers. If you are proposing a fix, also include information on the proposed fix. Since these examples are provided as-is, there is no guarantee that these examples will be updated to fix these issues.

Questions and comments related to these examples should be made by creating a new "Issue" in the "Issues" section of third_party_hw_drivers_extension repo.