PSOC™ 4: TCPWM square wave

This code example demonstrates how to generate a square wave using the TCPWM peripheral configured as a PWM on a PSOC™ 4 device.

View this README on GitHub.

Provide feedback on this code example.

Requirements

ModusToolbox™ v3.5 or later (tested with v3.5)
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, PSOC™ 4500S, PSOC™ 4100T Plus and PSOC™ 4 HV (High Voltage)

Supported toolchains (make variable 'TOOLCHAIN')

GNU Arm® Embedded Compiler v11.3.1 (GCC_ARM) – Default value of TOOLCHAIN
Arm® Compiler v6.22 (ARM)
IAR C/C++ Compiler v9.50.2 (IAR)

Supported kits (make variable 'TARGET')

PSOC™ 4100S Max Pioneer Kit (CY8CKIT-041S-MAX) - Default value of TARGET
PSOC™ 4100S Plus Prototyping Kit (CY8CKIT-149)
PSOC™ 4000S CAPSENSE™ Prototyping Kit (CY8CKIT-145-40XX)
PSOC™ 4000T CAPSENSE™ Prototyping Kit (CY8CPROTO-040T)
PSOC™ 4000T Multi-Sense Prototyping Kit (CY8CPROTO-040T-MS)
PSOC™ 4500S Pioneer Kit (CY8CKIT-045S)
PSOC™ 4100T Plus CAPSENSE™ Prototyping kit (CY8CPROTO-041TP)
PSOC™ 4 HVMS-128K Evaluation Kit (KIT_PSOC4-HVMS-128K_LITE)
PSOC™ 4 HVMS-64K Evaluation Kit (KIT_PSOC4-HVMS-64K_LITE)
PSOC™ 4 HVPA-144K Evaluation Kit (KIT_PSOC4-HVPA-144K_LITE)

Hardware setup

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

For CY8CKIT-045S, connect a jumper wire from P1[5] to P0[0] for LED connection.
For KIT_PSOC4-HVMS-128K_LITE, KIT_PSOC4-HVMS-64K_LITE, connect a jumper wire from P3[4] to P0[4] for LED connection.
For KIT_PSOC4-HVPA-144K_LITE, connect a jumper wire from P0[1] to P0[2] for LED connection.

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 If you do not upgrade, you will see an error like "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".

Software setup

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

This example requires no additional software or tools.

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

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 "mtb-example-psoc4-tcpwm-square-wave" application with the desired name "Psoc4TcpwmSquareWave" 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-square-wave --user-app-name Psoc4TcpwmSquareWave --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

Connect the board to your PC using the provided USB cable through the KitProg3 USB connector.
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
```
After programming, the application starts automatically.
Confirm that the kit LED blinks at approximately 2 Hz.

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.

In other IDEs

Follow the instructions in your preferred IDE.

Design and implementation

This code example uses the TCPWM, pin, and clock peripherals.

The PWM peripheral is connected to a 12-kHz clock and its period is set to 5999 to give an approximate 2-Hz PWM output (input clock/period). In this code example, the PWM starts counting from 0 to the period value. This means to count to N cycles such as 6000, the period should be set to N-1. The compare value is set to 3000, therefore, the PWM output has a 50% duty cycle. The output of the PWM is connected to an LED that blinks at approximately 2-Hz.

Resources and settings

Table 1. Application resources

Resource	Alias/object	Purpose
PWM (TCPWM)	PWM	Generate square wave and brings out the signal to GPIO
LED (BSP)	CYBSP_USER_LED	User LED to show output
Clock	Clock	Drive the PWM at 12 kHz

The application blinks an LED by controlling the GPIO output.

Note:

LED1 blinks for the CY8CKIT-041S-MAX and CY8CKIT-145-40XX kits.
LED2 blinks for the CY8CPROTO-041TP kit.
LED3 blinks for the CY8CPROTO-040T and CY8CPROTO-040T-MS kits.
LED12 blinks for the CY8CKIT-149 kit.
USER LED blinks with green color for the CY8CKIT-045S kit.
LED3 blinks for the KIT_PSOC4-HVMS-128K_LITE, KIT_PSOC4-HVMS-64K_LITE kits
USR LED7 blinks for the KIT_PSOC4-HVPA-144K_LITE kits

Related resources

Resources	Links
Application notes	AN79953 – Getting started with PSOC™ 4 AN0034 - Getting started with PSOC™ 4 HV MS MCUs in ModusToolbox™
Code examples	Using ModusToolbox™ on GitHub
Device documentation	PSOC™ 4 datasheets PSOC™ 4 technical reference manuals PSOC™ high voltage (HV) mixed signal (MS) automotive MCU 128K datasheets PSOC™ high voltage (HV) mixed signal (MS) automotive MCU 64K datasheets PSOC™ high voltage (HV) precision analog (PA) automotive MCU 144K datasheets PSOC™ high voltage (HV) mixed signal (MS) MCU: PSOC™ HVMS-128K registers reference manuals PSOC™ high voltage (HV) mixed signal (MS) MCU: PSOC™ HVMS-64K registers reference manuals PSOC™ high voltage (HV) mixed signal (MS) MCU architecture reference manuals PSOC™ high voltage (HV) precision analog (PA) MCU architecture 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.

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.

Document history

Document title: CE236396 - PSOC™ 4: TCPWM square wave

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.
1.2.0	Added support for KIT_PSOC4-HVMS-128K_LITE and KIT_PSOC4-HVMS-64K_LITE and updated to support ModusToolbox™ v3.2.
1.3.0	Added support for CY8CPROTO-040T-MS and updated to support ModusToolbox™ v3.4.
1.4.0	Added support for CY8CPROTO-041TP and updated to support ModusToolbox™ v3.5. Changed HVMS kit name PSoC4 to PSOC4.
1.5.0	Added support for KIT_PSOC4-HVMS-128K_LITE-02 and KIT_PSOC4-HVMS-64K_LITE-02.
1.6.0	Added support for KIT_PSOC4-HVPA-144K_LITE.

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