This code example demonstrates a real-time clock (RTC) alarm interrupt for a minute to set a periodically blinking LED on the XMC™ MCU evaluation kits.
- ModusToolbox™ software v3.0
- SEGGER J-Link software
- Programming language: C
- Associated parts: All XMC™ MCU parts
- GNU Arm® embedded compiler v10.3.1 (
GCC_ARM
) - Default value ofTOOLCHAIN
- XMC1100 boot kit (
KIT_XMC11_BOOT_001
) - XMC1200 boot kit (
KIT_XMC12_BOOT_001
) - XMC1300 boot kit (
KIT_XMC13_BOOT_001
) - XMC1400 boot kit (
KIT_XMC14_BOOT_001
) - Default value ofTARGET
- XMC4200 Platform2Go kit (
KIT_XMC_PLT2GO_XMC4200
) - XMC4300 relax EtherCAT kit (
KIT_XMC43_RELAX_ECAT_V1
) - XMC4400 Platform2Go kit (
KIT_XMC_PLT2GO_XMC4400
) - XMC4500 relax kit (
KIT_XMC45_RELAX_V1
) - XMC4700 relax kit (
KIT_XMC47_RELAX_V1
) - XMC4800 relax EtherCAT kit (
KIT_XMC48_RELAX_ECAT_V1
)
This example uses the board's default configuration. See the kit user guide to ensure that the board is configured correctly.
This example requires no additional software or tools.
Create the project and open it using one of the following:
In Eclipse IDE for ModusToolbox™ software
-
Click the New Application link in the Quick Panel (or, use File > New > ModusToolbox™ Application). This launches the Project Creator tool.
-
Pick a kit supported by the code example from the list shown in the Project Creator - Choose Board Support Package (BSP) dialog.
When you select a supported kit, the example is reconfigured automatically to work with the kit. To work with a different supported kit later, use the Library Manager to choose the BSP for the supported kit. You can use the Library Manager to select or update the BSP and firmware libraries used in this application. To access the Library Manager, click the link from the Quick Panel.
You can also just start the application creation process again and select a different kit.
If you want to use the application 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.
-
In the Project Creator - Select Application dialog, choose the example by enabling the checkbox.
-
(Optional) Change the suggested New Application Name.
-
The Application(s) Root Path defaults to the Eclipse workspace which is usually the desired location for the application. If you want to store the application in a different location, you can change the Application(s) Root Path value. Applications that share libraries should be in the same root path.
-
Click Create to complete the application creation process.
For more details, see the Eclipse IDE for ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/ide_{version}/docs/mt_ide_user_guide.pdf).
In command-line interface (CLI)
ModusToolbox™ software provides the Project Creator as both a GUI tool and the command line tool, "project-creator-cli". The 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™ software 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™ software installation instead of a standard Windows command-line application. This shell provides access to all ModusToolbox™ software 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 "project-creator-cli" tool has the following arguments:
Argument | Description | Required/optional |
---|---|---|
--board-id |
Defined in the <id> field of the BSP manifest |
Required |
--app-id |
Defined in the <id> 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 |
The following example clones the "RTC alarm" application with the desired name "RTC_Alarm" configured for the KIT_XMC47_RELAX_V1 BSP into the specified working directory, C:/mtb_projects:
project-creator-cli --board-id KIT_XMC47_RELAX_V1 --app-id mtb-example-xmc-rtc-alarm --user-app-name RTC_Alarm --target-dir "C:/mtb_projects"
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™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).
To work with a different supported kit later, use the Library Manager to choose the BSP for the supported kit. You can invoke the Library Manager GUI tool from the terminal using make library-manager
command or use the Library Manager CLI tool "library-manager-cli" to change the BSP.
The "library-manager-cli" tool has the following arguments:
Argument | Description | Required/optional |
---|---|---|
--add-bsp-name |
Name of the BSP that should be added to the application | Required |
--set-active-bsp |
Name of the BSP that should be as active BSP for the application | Required |
--add-bsp-version |
Specify the version of the BSP that should be added to the application if you do not wish to use the latest from manifest | Optional |
--add-bsp-location |
Specify the location of the BSP (local/shared) if you prefer to add the BSP in a shared path | Optional |
Following example adds the KIT_XMC48_RELAX_ECAT_V1 BSP to the already created application and makes it the active BSP for the app:
library-manager-cli --project "C:/mtb_projects/RTC_Alarm" --add-bsp-name KIT_XMC48_RELAX_ECAT_V1 --add-bsp-version "latest-v4.X" --add-bsp-location "local"
library-manager-cli --project "C:/mtb_projects/RTC_Alarm" --set-active-bsp APP_KIT_XMC48_RELAX_ECAT_V1
In third-party IDEs
Use one of the following options:
-
Use the standalone Project Creator tool:
-
Launch Project Creator from the Windows Start menu or from {ModusToolbox™ software install directory}/tools_{version}/project-creator/project-creator.exe.
-
In the initial Choose Board Support Package screen, select the BSP, and click Next.
-
In the Select Application screen, select the appropriate IDE from the Target IDE drop-down menu.
-
Click Create and follow the instructions printed in the bottom pane to import or open the exported project in the respective IDE.
-
-
Use command-line interface (CLI):
-
Follow the instructions from the In command-line interface (CLI) section to create the application.
-
Export the application to a supported IDE using the
make <ide>
command. -
Follow the instructions displayed in the terminal to create or import the application as an IDE project.
-
For a list of supported IDEs and more details, see the "Exporting to IDEs" section of the ModusToolbox™ software user guide (locally available at {ModusToolbox™ software install directory}/docs_{version}/mtb_user_guide.pdf).
-
Connect the board to your PC using a micro-USB cable through the debug USB connector.
-
Program the board using Eclipse IDE for ModusToolbox™ software:
-
Select the application project in the Project Explorer.
-
In the Quick Panel, scroll down, and click <Application Name> Program (JLink).
-
-
Confirm that the kit LED blinks at approximately 2 Hz because of the SysTick interrupt. The RTC is configured to generate an alarm after 1 minute.
-
Confirm that the kit LED stops blinking and remains glowing after a minute.
Note: In order to reset RTC to test the CE again after programming the first time, remove the cable for some time and then reconnect it. For KIT_XMC_PLT2GO_XMC4200 and KIT_XMC_PLT2GO_XMC4400 kits wait for approximately 10 minutes after removing the cable, since RTC is powered by Vbat.
You can debug the example to step through the code. In the IDE, use the <Application Name> Debug (JLink) configuration in the Quick Panel. For more details, see the "Program and debug" section in the Eclipse IDE for ModusToolbox™ user guide.
The code consists of the following steps:
-
Step 1: Initializes the RTC module with the
rtc_config
structure containing the alarm time and the clock divider. -
Step 2: Provides the initialization and enabling of the RTC alarm event interrupt and SysTick interrupt. The SysTick interrupt handler function (
SysTick_Handler()
) is used to toggle the user LED approximately every 500 ms. The RTC interrupt handler function (alarm_handler()
) stops the SysTick timer and sets thetimer_interrupt_flag
variable to TRUE which is used in Step 3. -
Step 3: Consists of the start of the RTC module using the
XMC_RTC_Start()
function and the endlesswhile
loop. In thewhile
loop, as soon as the RTC alarm event occurs, the precondition (timer_interrupt_flag = TRUE
) is fulfilled to set the output of the LED to HIGH. Afterward, the LED remains glowing.
Resources | Links |
---|---|
Code examples | Using ModusToolbox™ software on GitHub |
Device documentation | XMC1000 family datasheets XMC1000 family technical reference manuals XMC4000 family datasheets XMC4000 family technical reference manuals |
Development kits | XMC eval boards |
Libraries on GitHub | mtb-xmclib-cat3 – XMC™ peripheral library (XMCLib) |
Tools | Eclipse IDE for ModusToolbox™ software – 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. |
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 title: CE232574 - XMC™ MCU: RTC alarm
Version | Description of change |
---|---|
1.0.0 | New code example |
1.0.1 | Updated README |
1.1.0 | Added support for new kits |
2.0.0 | Updated to support ModusToolbox™ software v3.0; CE will not be backwards compatible with previous versions of ModusToolbox™ software. |
2.1.0 | Added support for RTC personality |
2.2.0 | RTC init sequence updated |
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