The example shows how to use the TCPWM to count the number of external events and display the results over UART.
Provide feedback on this code example.
- ModusToolbox™ v3.1 or later (tested with v3.1)
- Board support package (BSP) minimum required version: 3.1.0
- Programming language: C
- Associated parts: PSoC™ 4000S, PSoC™ 4100S Plus, PSoC™ 4100S Max, PSoC™ 4000T, and PSoC™ 4500S
- GNU Arm® Embedded Compiler v11.3.1 (
GCC_ARM) – Default value ofTOOLCHAIN - Arm® Compiler v6.16 (
ARM) - IAR C/C++ Compiler v9.30.1 (
IAR)
- PSoC™ 4100S Max Pioneer Kit (
CY8CKIT-041S-MAX) - Default value ofTARGET - PSoC™ 4100S Plus Prototyping Kit (
CY8CKIT-149) - PSoC™ 4000S CAPSENSE™ Prototyping Kit (
CY8CKIT-145-40XX) - PSoC™ 4000T CAPSENSE™ Prototyping Kit (
CY8CPROTO-040T) - PSoC™ 4500S Pioneer Kit (
CY8CKIT-045S)
This example uses the board's default configuration for all the kits listed above, except for the CY8CPROTO-040T. For CY8CPROTO-040T, make the hardware changes as mentioned below:
- To use UART functionality, change the SW2 switch towards UART side on the kit.
- To use the User Button, short J6.2 and J6.3 with the jumper shunt on the kit.
See the kit guide to ensure that the board is configured correctly.
Note: Some of the PSoC™ 4 kits 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 If you do not upgrade, you will see an error like "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".
See the ModusToolbox™ tools package installation guide for information about installing and configuring the tools package. Install a terminal emulator if you do not have one. Instructions in this document use Tera Term.
This example requires no additional software or tools.
The ModusToolbox™ tools package provides the Project Creator as both a GUI tool and a command line tool.
Use Project Creator GUI
-
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).
-
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.
-
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 "TCPWM Event Counter" application with the desired name "TCPWMEventCounter" configured for the CY8CKIT-041S-MAX BSP into the specified working directory, C:/mtb_projects:
project-creator-cli --board-id CY8CKIT-041S-MAX --app-id mtb-example-psoc4-tcpwm-event-counter --user-app-name TCPWMEventCounter --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 cloneandmake getlibscommands 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).
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).
-
Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.
-
Open a terminal program and select the KitProg3 COM port. Set the serial port parameters to 8N1 and 115200 baud.
-
Connect an external hardware jumper wire between CYBSP_SW (switch) and COUNT_PIN (EVENT_COUNTER).
Notes:
-
For CY8CKIT-041S-MAX, connect an external switch to Count Signal (P1.2).
-
For CY8CKIT-145-40XX, connect jumper wire between the switch (P0.7) and COUNT_PIN (P3.7).
-
For CY8CKIT-149, connect a jumper wire between the switch (P3.7) and COUNT_PIN (P0.0).
-
For CY8CPROTO-040T, connect a jumper wire between the switch (P3.0) and COUNT_PIN (P0.0).
-
This step is not required for CY8CKIT-045S since the switch connection is hardwired on the board.
-
-
Program the board using one of the following:
Using Eclipse IDE
-
Select the application project in the Project Explorer.
-
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 programcommand 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 -
-
Count the number of times you press and release the SW switch within ten seconds. The terminal window should display the same count.
-
Repeat step 5 multiple times.
-
After programming, the application starts automatically. Confirm that "Count value" is displayed on the UART terminal.
Figure 1. Sample output as displayed on Tera Term
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.
In other IDEs
Follow the instructions in your preferred IDE.
The design consists of two TCPWM peripherals, EVENT_COUNTER and TIMER. The EVENT_COUNTER is configured to increment by one whenever there is a falling edge on its count input. The kit button SW is connected to the EVENT_COUNTER count input. The TIMER is configured to generate an interrupt every ten seconds. The EVENT_COUNTER counts the number of button presses on the kit every ten seconds and sends the data to the serial terminal through UART. The ERROR_RED_LED switches ON if the UART initialization fails.
Figure 2. Firmware flowchart
Table 1. Application resources
| Resource | Alias/object | Purpose |
|---|---|---|
| Timer (PDL) | TIMER | Generates a ten-seconds time window |
| Counter (PDL) | EVENT_COUNTER | Counts the number of falling edges of input signal |
| UART (PDL) | CYBSP_UART | Sends to and receives data from the UART terminal |
| LED (BSP) | CYBSP_USER_LED | User LED to show output |
| Peripheral-Clocks | Clock_1 | Drives the 10-seconds timer at 3.2 kHz |
| Interrupt | timer_isr_handler | Configures the interrupt |
| Pins | SW, COUNT_PIN | Physical pins |
The application uses a UART to print messages in a UART terminal emulator. It also blinks an LED when operation fails.
| Resources | Links |
|---|---|
| Application notes | AN79953 – Getting started with PSoC™ 4 |
| Code examples | Using ModusToolbox™ on GitHub |
| Device documentation | PSoC™ 4 datasheets PSoC™ 4 technical reference manuals |
| Development kits | Select your kits from the Evaluation board finder page. |
| Libraries on GitHub | mtb-pdl-cat2 – PSoC™ 4 Peripheral Driver Library (PDL) mtb-hal-cat2 – Hardware Abstraction Layer (HAL) library |
| Tools | ModusToolbox™ – ModusToolbox™ software is a collection of easy-to-use libraries and tools enabling rapid development with Infineon MCUs for applications ranging from wireless and cloud-connected systems, edge AI/ML, embedded sense and control, to wired USB connectivity using PSoC™ Industrial/IoT MCUs, AIROC™ Wi-Fi and Bluetooth® connectivity devices, XMC™ Industrial MCUs, and EZ-USB™/EZ-PD™ wired connectivity controllers. ModusToolbox™ incorporates a comprehensive set of BSPs, HAL, libraries, configuration tools, and provides support for industry-standard IDEs to fast-track your embedded application development. |
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.
Document title: CE236708 – PSoC™ 4: TCPWM event counter
| Version | Description of change |
|---|---|
| 1.0.0 | New code example |
| 1.1.0 | Added support for new kits and updated to support ModusToolbox™ v3.1. |
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