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| # PSoC™ 4: CAPSENSE™ buttons and slider RTT | |
| This code example demonstrates how to monitor self-capacitance (CSD) based buttons and slider widgets using the CAPSENSE™ tuner through RTT in PSoC™ 4 devices. | |
| [View this README on GitHub.](https://github.com/Infineon/mtb-example-psoc4-capsense-buttons-and-slider-rtt) | |
| [Provide feedback on this code example.](https://cypress.co1.qualtrics.com/jfe/form/SV_1NTns53sK2yiljn?Q_EED=eyJVbmlxdWUgRG9jIElkIjoiQ0UyMzgwODkiLCJTcGVjIE51bWJlciI6IjAwMi0zODA4OSIsIkRvYyBUaXRsZSI6IlBTb0MmdHJhZGU7IDQ6IENBUFNFTlNFJnRyYWRlOyBidXR0b25zIGFuZCBzbGlkZXIgUlRUIiwicmlkIjoicmFqYW5uYWdhdXRhIiwiRG9jIHZlcnNpb24iOiIxLjEuMCIsIkRvYyBMYW5ndWFnZSI6IkVuZ2xpc2giLCJEb2MgRGl2aXNpb24iOiJNQ0QiLCJEb2MgQlUiOiJJQ1ciLCJEb2MgRmFtaWx5IjoiUFNPQyJ9) | |
| ## Requirements | |
| - [ModusToolbox™](https://www.infineon.com/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, and PSoC™ 4500S](https://www.infineon.com/cms/en/product/microcontroller/32-bit-psoc-arm-cortex-microcontroller/psoc-4-32-bit-arm-cortex-m0-mcu/) | |
| ## Supported toolchains (make variable 'TOOLCHAIN') | |
| - GNU Arm® Embedded Compiler v11.3.1 (`GCC_ARM`) – Default value of `TOOLCHAIN` | |
| - IAR C/C++ Compiler v9.30.1 (`IAR`) | |
| ## Supported kits (make variable 'TARGET') | |
| - [PSoC™ 4100S Plus Prototyping Kit](https://www.infineon.com/CY8CKIT-149) (`CY8CKIT-149`) – Default `TARGET` | |
| - [PSoC™ 4000S CAPSENSE™ Prototyping Kit](https://www.infineon.com/CY8CKIT-145-40XX) (`CY8CKIT-145-40XX`) | |
| - [PSoC™ 4500S Pioneer Kit](https://www.infineon.com/CY8CKIT-045S) (`CY8CKIT-045S`) | |
| ## Hardware setup | |
| This example uses the board's default configuration. See the kit user 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](https://github.com/Infineon/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 If you do not upgrade, you will see an error like "unable to find CMSIS-DAP device" or "KitProg firmware is out of date".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](https://www.infineon.com/ModusToolboxInstallguide) 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. | |
| <details><summary><b>Use Project Creator GUI</b></summary> | |
| 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](https://www.infineon.com/ModusToolboxProjectCreator) (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](#supported-kits-make-variable-target). | |
| > **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. | |
| </details> | |
| <details><summary><b>Use Project Creator CLI</b></summary> | |
| ModusToolbox™ 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™ 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 "[CAPSENSE™ buttons and slider RTT](https://github.com/Infineon/mtb-example-psoc4-capsense-buttons-and-slider-rtt)" application with the desired name "CapsenseButtonsandSliderRTT" configured for the [*CY8CKIT-149*](https://www.infineon.com/CY8CKIT-149) BSP into the specified working directory, *C:/mtb_projects*: | |
| ``` | |
| project-creator-cli --board-id CY8CKIT-149 --app-id mtb-example-psoc4-capsense-buttons-and-slider-rtt --user-app-name CapsenseButtonsandSliderRTT --target-dir "C:/mtb_projects" | |
| ``` | |
| The 'project-creator-cli' tool has the following arguments: | |
| Argument | Description | Required/optional | |
| ---------|-------------|----------- | |
| `--board-id` | Defined in the <id> field of the [BSP](https://github.com/Infineon?q=bsp-manifest&type=&language=&sort=) manifest | Required | |
| `--app-id` | Defined in the <id> field of the [CE](https://github.com/Infineon?q=ce-manifest&type=&language=&sort=) 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™ user guide](https://www.infineon.com/ModusToolboxUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf). | |
| </details> | |
| ### Open the project | |
| After the project has been created, you can open it in your preferred development environment. | |
| <details><summary><b>Eclipse IDE</b></summary> | |
| 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](https://www.infineon.com/MTBEclipseIDEUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mt_ide_user_guide.pdf*). | |
| </details> | |
| <details><summary><b>Visual Studio (VS) Code</b></summary> | |
| 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](https://www.infineon.com/MTBVSCodeUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mt_vscode_user_guide.pdf*). | |
| </details> | |
| <details><summary><b>Keil µVision</b></summary> | |
| 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](https://www.infineon.com/MTBuVisionUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mt_uvision_user_guide.pdf*). | |
| </details> | |
| <details><summary><b>IAR Embedded Workbench</b></summary> | |
| 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](https://www.infineon.com/MTBIARUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mt_iar_user_guide.pdf*). | |
| </details> | |
| <details><summary><b>Command line</b></summary> | |
| 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](https://www.infineon.com/ModusToolboxUserGuide) (locally available at *{ModusToolbox™ install directory}/docs_{version}/mtb_user_guide.pdf*). | |
| </details> | |
| ## Operation | |
| 1. Connect the board to your PC using the provided USB cable through the KitProg3 USB connector. | |
| 2. Program the board using one of the following: | |
| <details><summary><b>Using Eclipse IDE</b></summary> | |
| 1. Select the application project in the Project Explorer. | |
| 2. In the **Quick Panel**, scroll down, and click **\<Application Name> Program (KitProg3_MiniProg4)**. | |
| </details> | |
| <details><summary><b>In other IDEs</b></summary> | |
| Follow the instructions in your preferred IDE. | |
| </details> | |
| <details><summary><b>Using CLI</b></summary> | |
| 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 | |
| ``` | |
| </details> | |
| 3. After programming, the application starts automatically. | |
| ### Monitor data using CAPSENSE™ Tuner | |
| 1. Launch the CAPSENSE™ tuner from the 'BSP Configurators' section in the IDE **Quick Panel**. | |
| 2. Ensure that the kits are in CMSIS-DAP Bulk mode (KitProg3 Status LED is ON and not blinking). See [Firmware Loader](https://github.com/Infineon/Firmware-loader) to learn how to update the firmware and switch modes in KitProg3. | |
| 3. In the tuner application, click on the **Tuner communication setup** icon or select **Tools** > **Tuner Communication Setup**. In the window that appears, select the RTT checkbox under KitProg3 and configure it as shown in **Figure 1**. | |
| **Figure 1. Tuner communication setup parameters** | |
|  | |
| 4. Recommended TCP Port for Tuner is 50567. | |
| 5. Click **Connect** or select **Communication** > **Connect** to establish a connection. Wait till the RTT is initialising. | |
| **Figure 2. Establish connection** | |
|  | |
| 6. Click **Start** or select **Communication** > **Start** to start data streaming from the device. Open **RTT Log view** for additional information. | |
| **Figure 3. Start tuner communication** | |
|  | |
| 7. The Tuner GUI displays the data from the sensor in the **Widget View** and **Graph View** tabs. | |
| ## Debugging | |
| You can debug the example to step through the code. | |
| <details><summary><b>In Eclipse IDE</b></summary> | |
| 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](https://www.infineon.com/MTBEclipseIDEUserGuide). | |
| </details> | |
| <details><summary><b>In other IDEs</b></summary> | |
| Follow the instructions in your preferred IDE. | |
| </details> | |
| ## Design and implementation | |
| The project uses the [CAPSENSE™ middleware](https://github.com/Infineon/capsense) (see ModusToolbox™ user guide for more details on selecting the middleware). See [AN85951 – PSoC™ 4 and PSoC™ 6 MCU CAPSENSE™ design guide](https://www.infineon.com/AN85951) for more details on CAPSENSE™ features and usage. | |
| The code example implements CAPSENSE™ buttons and slider example for PSoC™ 4 devices using RTT to connect to CAPSENSE™ tuner. This is an alternative to the existing I2C and UART channels, and communication happens over SWD lines to connect to the tuner. | |
| The design contains multiple button widgets and a CAPSENSE™ slider and the RTT peripheral. The RTT peripheral is used to monitor the sensor data of buttons, slider, and slider touch position information on a PC using the CAPSENSE™ tuner available in the Eclipse IDE for ModusToolbox™ via RTT communication. | |
| The code scans the widgets using the CSD sensing method and sends the CAPSENSE™ raw data over an RTT interface to the CAPSENSE™ tuner GUI tool on a PC. | |
| > **Note:** For [CY8CKIT-045S](https://www.infineon.com/CY8CKIT-045S) only one button is present. | |
| ### Resources and settings | |
| 1. Connect the board to your PC using the provided USB cable through the KitProg3 USB connector. | |
| 2. Launch the CAPSENSE™ configurator tool. | |
| The CAPSENSE™ configurator tool can be launched in Eclipse IDE for ModusToolbox™ from the 'CSD peripheral' setting in the device configurator or in stand-alone mode directly from the Project Explorer. | |
| See the [ModusToolbox™ CAPSENSE™ configurator tool guide](https://www.infineon.com/ModusToolboxCapSenseConfig) for step-by-step instructions on how to configure and launch CAPSENSE™ in the ModusToolbox™. | |
| 3. In the **Basic** tab, a single slider **LinearSlider0** and multiple buttons (**Button0**, **Button1**, and **Button2**) are configured as a **CSD**, and the CSD tuning mode is configured as **SmartSense (Full Auto-Tune)**. | |
| **Figure 4. CAPSENSE™ configurator - Basic tab** | |
|  | |
| 4. Do the following in the **General** sub-tab under the **Advanced** tab: | |
| **Figure 5. CAPSENSE™ configurator - General sub-tab in Advanced Tab** | |
|  | |
| 5. Go to the **CSD Settings** tab and make the following changes: | |
| - Select **Enable compensation CDAC**. | |
| **Figure 6. CAPSENSE™ configurator - CSD settings sub-tab in Advanced Tab** | |
|  | |
| 6. Go to the **Widget Details** tab. Observe that all the parameters are set by SmartSense. | |
| **Figure 7. CAPSENSE™ configurator - Widget Details in Advanced Tab** | |
|  | |
| 7. Click **Save** to apply the settings. | |
| **Table 1. Application resources** | |
| | Resource | Alias/object | Purpose | | |
| | :------- | :------------ | :------------ | | |
| | RTT | - | Used to communicate with the CAPSENSE™ tuner | | |
| | CAPSENSE™ | CYBSP_CSD | CAPSENSE™ driver to interact with the CSD hardware and interface CAPSENSE™ sensors | | |
| <br> | |
| ## Related resources | |
| Resources | Links | |
| -----------|---------------------------------- | |
| Application notes | [AN79953](https://www.infineon.com/AN79953) – Getting started with PSoC™ 4 | |
| Code examples | [Using ModusToolbox™](https://github.com/Infineon/Code-Examples-for-ModusToolbox-Software) on GitHub | |
| Device documentation | [PSoC™ 4 datasheets](https://www.infineon.com/cms/en/search.html#!view=downloads&term=psoc4&doc_group=Data%20Sheet) <br>[PSoC™ 4 technical reference manuals](https://www.infineon.com/cms/en/search.html#!view=downloads&term=psoc4&doc_group=Additional%20Technical%20Information) | |
| Development kits | Select your kits from the [Evaluation board finder](https://www.infineon.com/cms/en/design-support/finder-selection-tools/product-finder/evaluation-board) page. | |
| Libraries on GitHub | [mtb-pdl-cat2](https://github.com/Infineon/mtb-pdl-cat2) – PSoC™ 4 Peripheral Driver Library (PDL)<br> [mtb-hal-cat2](https://github.com/Infineon/mtb-hal-cat2) – Hardware Abstraction Layer (HAL) library | |
| Middleware on GitHub | [capsense](https://github.com/Infineon/capsense) – CAPSENSE™ library and documents <br> | |
| Tools | [ModusToolbox™](https://www.infineon.com/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. | |
| <br> | |
| ## Other resources | |
| Infineon provides a wealth of data at [www.infineon.com](https://www.infineon.com) to help you select the right device, and quickly and effectively integrate it into your design. | |
| ## Document history | |
| Document title: *CE238089* - *PSoC™ 4: CAPSENSE™ buttons and slider RTT* | |
| Version | Description of change | |
| ------- | --------------------- | |
| 1.0.0 | New code example | |
| 1.1.0 | Added support for CY8CKIT-045S | |
| <br> | |
| --------------------------------------------------------- | |
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| <br> | |
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