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This example demonstrates the usage of the real-time clock (RTC) in PSoC 6 MCU. It shows how to get and set the time in the RTC using the RTC driver API.

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HAL: Real-time clock basics

This example demonstrates the usage of the real-time clock (RTC) in Infineon MCU. It shows how to get and set the time in the RTC using the RTC HAL API. The example also supports the daylight saving time (DST) feature. A UART interface is used to input the time and configure the RTC.

View this README on GitHub.

Provide feedback on this code example.

Requirements

Supported toolchains (make variable 'TOOLCHAIN')

  • GNU Arm® Embedded Compiler v11.3.1 (GCC_ARM) – Default value of TOOLCHAIN
  • Arm® Compiler v6.16 (ARM)
  • IAR C/C++ Compiler v9.30.1 (IAR)

Supported kits (make variable 'TARGET')

Hardware Setup

This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.

Note: The PSoC™ 6 Bluetooth® LE Pioneer Kit (CY8CKIT-062-BLE) and the PSoC™ 6 Wi-Fi Bluetooth® Pioneer Kit (CY8CKIT-062-WIFI-BT) ship with KitProg2 installed. ModusToolbox™ requires KitProg3. Before using this code example, make sure that the board is upgraded to KitProg3. The tool and instructions are available in the Firmware Loader GitHub repository. If you do not upgrade, you will see an error like "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".

Note: The AIROC™ CYW20829 Bluetooth® Kit (CYW920829M2EVK-02) ships with KitProg3 version 2.21 installed. The ModusToolbox™ software requires KitProg3 with latest version 2.40. Before using this code example, make sure that the board is upgraded to KitProg3. The tool and instructions are available in the Firmware Loader GitHub repository. If you do not upgrade, you will see an error such as "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".

Software setup

See the ModusToolbox™ tools package installation guide for information about installing and configuring the tools package.

Install a terminal emulator if you don't have one. Instructions in this document use Tera Term.

Using the code example

Create the project

The ModusToolbox™ tools package provides the Project Creator as both a GUI tool and a command line tool.

Use Project Creator GUI

  1. Open the Project Creator GUI tool.

    There are several ways to do this, including launching it from the dashboard or from inside the Eclipse IDE. For more details, see the Project Creator user guide (locally available at {ModusToolbox™ install directory}/tools_{version}/project-creator/docs/project-creator.pdf).

  2. On the Choose Board Support Package (BSP) page, select a kit supported by this code example. See Supported kits.

    Note: To use this code example for a kit not listed here, you may need to update the source files. If the kit does not have the required resources, the application may not work.

  3. On the Select Application page:

    a. Select the Applications(s) Root Path and the Target IDE.

    Note: Depending on how you open the Project Creator tool, these fields may be pre-selected for you.

    b. Select this code example from the list by enabling its check box.

    Note: You can narrow the list of displayed examples by typing in the filter box.

    c. (Optional) Change the suggested New Application Name and New BSP Name.

    d. Click Create to complete the application creation process.

Use Project Creator CLI

The 'project-creator-cli' tool can be used to create applications from a CLI terminal or from within batch files or shell scripts. This tool is available in the {ModusToolbox™ install directory}/tools_{version}/project-creator/ directory.

Use a CLI terminal to invoke the 'project-creator-cli' tool. On Windows, use the command-line 'modus-shell' program provided in the ModusToolbox™ installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ tools. You can access it by typing "modus-shell" in the search box in the Windows menu. In Linux and macOS, you can use any terminal application.

The following example clones the "mtb-example-hal-rtc-basics" application with the desired name "MyRTCBasics" configured for the CY8CPROTO-062S2-43439 BSP into the specified working directory, C:/mtb_projects:

project-creator-cli --board-id CY8CPROTO-062S2-43439 --app-id mtb-example-hal-rtc-basics --user-app-name MyRTCBasics --target-dir "C:/mtb_projects"

The 'project-creator-cli' tool has the following arguments:

Argument Description Required/optional
--board-id Defined in the field of the BSP manifest Required
--app-id Defined in the field of the CE manifest Required
--target-dir Specify the directory in which the application is to be created if you prefer not to use the default current working directory Optional
--user-app-name Specify the name of the application if you prefer to have a name other than the example's default name Optional

Note: The project-creator-cli tool uses the git clone and make getlibs commands to fetch the repository and import the required libraries. For details, see the "Project creator tools" section of the ModusToolbox™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).

Open the project

After the project has been created, you can open it in your preferred development environment.

Eclipse IDE

If you opened the Project Creator tool from the included Eclipse IDE, the project will open in Eclipse automatically.

For more details, see the Eclipse IDE for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_ide_user_guide.pdf).

Visual Studio (VS) Code

Launch VS Code manually, and then open the generated {project-name}.code-workspace file located in the project directory.

For more details, see the Visual Studio Code for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_vscode_user_guide.pdf).

Keil µVision

Double-click the generated {project-name}.cprj file to launch the Keil µVision IDE.

For more details, see the Keil µVision for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_uvision_user_guide.pdf).

IAR Embedded Workbench

Open IAR Embedded Workbench manually, and create a new project. Then select the generated {project-name}.ipcf file located in the project directory.

For more details, see the IAR Embedded Workbench for ModusToolbox™ user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mt_iar_user_guide.pdf).

Command line

If you prefer to use the CLI, open the appropriate terminal, and navigate to the project directory. On Windows, use the command-line 'modus-shell' program; on Linux and macOS, you can use any terminal application. From there, you can run various make commands.

For more details, see the ModusToolbox™ tools package user guide (locally available at {ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf).

Operation

If using a PSoC™ 64 "Secure" MCU kit (like CY8CKIT-064B0S2-4343W), the PSoC™ 64 device must be provisioned with keys and policies before being programmed. Follow the instructions in the "Secure Boot" SDK user guide to provision the device. If the kit is already provisioned, copy-paste the keys and policy folder to the application folder.

  1. Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.

  2. Open a terminal program and select the KitProg3 COM port. Set the serial port parameters to 8N1 and 115200 baud.

  3. Program the board using one of the following:

    Using Eclipse IDE

    1. Select the application project in the Project Explorer.

    2. In the Quick Panel, scroll down, and click <Application Name> Program (KitProg3_MiniProg4).

    In other IDEs

    Follow the instructions in your preferred IDE.

    Using CLI

    From the terminal, execute the make program command to build and program the application using the default toolchain to the default target. The default toolchain is specified in the application's Makefile but you can override this value manually:

    make program TOOLCHAIN=<toolchain>

    Example:

    make program TOOLCHAIN=GCC_ARM

  4. After programming, the application starts automatically. Confirm that "HAL: RTC Basics" is displayed on the UART terminal.

    Figure 1. Terminal window on startup

  5. Type 1 in the main menu. You will be prompted for new date and time. Enter the new date and time, and press Enter.

    If an incorrect date or time is entered, a warning message is printed.

    Figure 2. Set time command

  6. Type 2 in the main menu. You will be prompted to configure the DST feature in the sub menu.

    The current DST status will be displayed along with the available DST commands.

    Figure 3. Configure DST feature command

  7. Type 1 in the sub-menu. When prompted, enter the DST format (Fixed DST format or Relative DST format), followed by the new DST start and end time.

    If an incorrect date or time is entered, a warning message is printed.

    Figure 4. Enable DST feature command

    Note: While using DST, it can either be in fixed DST format or in a relative DST format.

    An example of fixed DST format: begins on 21st March and ends on 21st September.

    An example of relative DST format: begins on the last Sunday of March and ends on the last Sunday of October.

  8. Type 2 in the sub-menu to disable the DST feature:

    Figure 5. 'Disable DST feature' command

  9. Type 3 in the sub-menu to quit DST configuration:

    Figure 6. 'Quit DST configuration' command

Debugging

You can debug the example to step through the code.

In Eclipse IDE

Use the <Application Name> Debug (KitProg3_MiniProg4) configuration in the Quick Panel. For details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ user guide.

Note: (Only while debugging) On the CM4 CPU, some code in main() may execute before the debugger halts at the beginning of main(). This means that some code executes twice – once before the debugger stops execution, and again after the debugger resets the program counter to the beginning of main(). See KBA231071 to learn about this and for the workaround.

In other IDEs

Follow the instructions in your preferred IDE.

Design and implementation

This code example features the RTC resource and one UART resource. The RTC resource provides time and date information – second, minute, hour, day of the week, date, month, and year. The time and date information are updated every second with automatic leap-year compensation performed by the RTC hardware block.

The CPU waits for the line feed (LF) or the carriage return (CR) character from the serial terminal. When it is received, the code parses the commands that have been sent:

  • If the input command is ‘1’, updates the RTC with the new date and time

  • If the input command is ‘2’, enters the sub-menu where you can configure the DST feature using the following inputs:

    • If the input command is ‘1’ in the sub-menu, updates the RTC, when DST should start and end

    • If the input command is ‘2’ in the sub menu, disables the DST feature

    • If the input command is ‘3’ in the sub menu, quits the DST configuration

The application uses the RTC resource from the Hardware abstraction layer (HAL) to read or update the RTC peripheral.

An RTC HAL resource is configured as a pointer to an RTC object whose contents are initialized by the cyhal_rtc_init function. This function also powers up the RTC in preparation for access.

The current time and date can be read from the RTC peripheral using the cyhal_rtc_read function. Similarly, the cyhal_rtc_write function is used to write the specified time and date to the RTC peripheral.

In addition to these methods, the DST feature can be configured using the following functions:

  • set_dst_feature: To enable the DST feature. Internally uses RTC HAL functions.

  • cyhal_rtc_set_dst: To set DST start and end time

  • cyhal_rtc_is_dst : To check if DST is currently active

Resources and settings

Table 1. Application resources

Resource Alias/object Purpose
UART (HAL) cy_retarget_io_uart_obj UART HAL object used by retarget-io for debug UART port
RTC (HAL) rtc_obj RTC HAL object for RTC interface

Related resources

Resources Links
Application notes AN228571 – Getting started with PSoC™ 6 MCU on ModusToolbox™ software
AN234334 – Getting started with XMC7000 MCU on ModusToolbox™
Code examples Using ModusToolbox™ on GitHub
Using PSoC™ Creator
Device documentation PSoC™ 6 MCU datasheets
PSoC™ 6 technical reference manuals
PSoC™ 4 datasheets
PSoC™ 4 technical reference manuals
Development kits Select your kits from the Evaluation board finder
Libraries on GitHub mtb-pdl-cat1 – PSoC™ 6 peripheral driver library (PDL)
mtb-hal-cat1 – Hardware abstraction layer (HAL) library
retarget-io – Utility library to retarget STDIO messages to a UART port
mtb-pdl-cat2 – PSoC™ 4 peripheral driver library (PDL)
mtb-hal-cat2 – Hardware abstraction layer (HAL) library
Middleware on GitHub capsense – CAPSENSE™ library and documents
psoc6-middleware – Links to all PSoC™ 6 MCU middleware
Tools Eclipse IDE for ModusToolbox™ – ModusToolbox™ software is a collection of easy-to-use software and tools enabling rapid development with Infineon MCUs, covering applications from embedded sense and control to wireless and cloud-connected systems using AIROC™ Wi-Fi and Bluetooth® connectivity devices.
PSoC™ Creator – IDE for PSoC™ and FM0+ MCU development

Other resources

Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.

For XMC™ MCU devices, see 32-bit XMC™ Industrial microcontroller based on Arm® Cortex®-M.

Document history

Document title: CE225740 – HAL: Real-time clock basics

Version Description of change
1.0.0 New code example
1.1.0 Updated to support ModusToolbox™ software v2.1.
Minor formatting changes to the code.
2.0.0 Major update to support ModusToolbox™ software v2.2, added support for new kits.
This version is not backward compatible with ModusToolbox™ software v2.1.
2.1.0 Added support for CYSBSYSKIT-DEV-01 Rapid IoT Connect developer kit
2.1.1 Updated to support ModusToolbox™ software v2.3.
Added support for CY8CKIT-062S4.
3.0.0 Major update to support ModusToolbox™ software v3.0.
Added support for KIT_XMC72_EVK.
3.1.0 Added support for CY8CEVAL-062S2, CY8CEVAL-062S2-LAI-4373M2, CY8CEVAL-062S2-MUR-43439M2, CY8CPROTO-064B0S3, and CY8CPROTO-064S1-SB.
3.2.0 Added support for CYW920829M2EVK-02, KIT_T2G-B-H_EVK and KIT_T2G-B-H_LITE
Replaced retarget_io_init() with retarget_io_init_fc() function.
3.3.0 Added support for KIT_XMC71_EVK_LITE_V1, CYBLE-416045-EVAL and CY8CPROTO-062S2-43439.
Updated to support ModusToolbox™ v3.1.
3.4.0 Added support for CYW989829M2EVB-01

All referenced product or service names and trademarks are the property of their respective owners.

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and any use of such marks by Infineon is under license.

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This example demonstrates the usage of the real-time clock (RTC) in PSoC 6 MCU. It shows how to get and set the time in the RTC using the RTC driver API.

Topics

peripherals cy8ckit-062-wifi-bt cy8cproto-062-4343w cy8ckit-062-ble cy8cproto-063-ble cy8ckit-062s2-43012 cyw9p62s1-43438evb-01 cyw9p62s1-43012evb-01 cy8ckit-064b0s2-4343w cy8ckit-062s4 cy8ceval-062s2 cy8ceval-062s2-lai-4373m2 cy8ceval-062s2-mur-43439m2 cyble-416045-eval cy8cproto-064b0s3 cy8cproto-064s1-sb kit-xmc72-evk cy8cproto-062s2-43439 cyw920829m2evk-02 kit-xmc71-evk-lite-v1

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