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| # Bluetooth® LE UI demo | |
| This code example features a Bluetooth® LE custom GATT service with UI experience for an E-INK display along with sensors and RGB LED. The sensor readings are sent to the GATT Client over GATT indication. This RGB LED is controlled over a GATT Client application; it is developed in the ModusToolbox™ software environment. | |
| This code example uses FreeRTOS. Visit the FreeRTOS website for documentation and API references. | |
| [View this README on GitHub.](https://github.com/Infineon/mtb-example-psoc6-freertos-bluetooth-ui-demo) | |
| [Provide feedback on this code example.](https://cypress.co1.qualtrics.com/jfe/form/SV_1NTns53sK2yiljn?Q_EED=eyJVbmlxdWUgRG9jIElkIjoiQ0UyMzgwNTMiLCJTcGVjIE51bWJlciI6IjAwMi0zODA1MyIsIkRvYyBUaXRsZSI6IkJsdWV0b290aCZyZWc7IExFIFVJIGRlbW8iLCJyaWQiOiJhc3JhIiwiRG9jIHZlcnNpb24iOiIxLjAuMCIsIkRvYyBMYW5ndWFnZSI6IkVuZ2xpc2giLCJEb2MgRGl2aXNpb24iOiJNQ0QiLCJEb2MgQlUiOiJJQ1ciLCJEb2MgRmFtaWx5IjoiQlRBQkxFIn0=) | |
| ## Requirements | |
| - [ModusToolbox™ software](https://www.infineon.com/modustoolbox) v3.0 or later (tested with v3.0) | |
| - Board support package (BSP) minimum required version: 4.0.0 | |
| - Programming language: C | |
| - Associated parts: All [PSoC™ 6 MCU](https://www.infineon.com/cms/en/product/microcontroller/32-bit-psoc-arm-cortex-microcontroller/psoc-6-32-bit-arm-cortex-m4-mcu) parts and [PSoC™ 6 MCU with AIROC™ Bluetooth® LE](https://www.infineon.com/cms/en/product/microcontroller/32-bit-psoc-arm-cortex-microcontroller/psoc-6-32-bit-arm-cortex-m4-mcu/psoc-63/) | |
| ## Supported toolchains (make variable 'TOOLCHAIN') | |
| - GNU Arm® Embedded Compiler v10.3.1 (`GCC_ARM`) - Default value of `TOOLCHAIN` | |
| - Arm® Compiler v6.16 (`ARM`) | |
| - IAR C/C++ Compiler v9.30.1 (`IAR`) | |
| ## Supported kits (make variable 'TARGET') | |
| - [PSoC™ 6 Bluetooth® LE pioneer kit](https://www.infineon.com/CY8CKIT-062-BLE) (`CY8CKIT-062-BLE`) - Default value of `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) ships with E-INK Display and KitProg2 installed. The ModusToolbox™ software 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 | |
| Download and install the AIROC™ Bluetooth® Connect app on your [Android](https://play.google.com/store/apps/details?id=com.infineon.airocbluetoothconnect) or [iOS](https://apps.apple.com/in/app/airoc-bluetooth-connect-app/id6443702288) phone. | |
| Install a terminal emulator if you don't have one. Instructions in this document use [Tera Term](https://ttssh2.osdn.jp/index.html.en). All other required software come bundled with the Eclipse IDE for ModusToolbox™ software. | |
| ## Using the code example | |
| Create the project and open it using one of the following: | |
| <details><summary><b>In Eclipse IDE for ModusToolbox™ software</b></summary> | |
| 1. Click the **New Application** link in the **Quick Panel** (or, use **File** > **New** > **ModusToolbox™ Application**). This launches the [Project Creator](https://www.infineon.com/ModusToolboxProjectCreator) tool. | |
| 2. 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](https://www.infineon.com/ModusToolboxLibraryManager) 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. | |
| 3. In the **Project Creator - Select Application** dialog, choose the example by enabling the checkbox. | |
| 4. (Optional) Change the suggested **New Application Name**. | |
| 5. 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. | |
| 6. Click **Create** to complete the application creation process. | |
| For more details, see the [Eclipse IDE for ModusToolbox™ user guide](https://www.infineon.com/MTBEclipseIDEUserGuide) (locally available at *{ModusToolbox™ software install directory}/docs_{version}/mt_ide_user_guide.pdf*). | |
| </details> | |
| <details><summary><b>In command-line interface (CLI)</b></summary> | |
| 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](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 | |
| <br> | |
| The following example clones the "[Bluetooth® UI Demo](https://github.com/Infineon/mtb-example-psoc6-freertos-bluetooth-ui-demo)" application with the desired name "MyUI-Demo" configured for the *CY8CKIT-062-BLE* BSP into the specified working directory, *C:/mtb_projects*: | |
| ``` | |
| project-creator-cli --board-id CY8CKIT-062-BLE--app-id mtb-example-psoc6-freertos-bluetooth-ui-demo --user-app-name MyUI-Demo --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](https://www.infineon.com/ModusToolboxUserGuide) (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](https://www.infineon.com/ModusToolboxLibraryManager) 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 | |
| <br> | |
| The following example adds the CY8CKIT-062-BLE BSP to the already created application and makes it the active BSP for the app: | |
| ``` | |
| library-manager-cli --project "C:/mtb_projects/MyUI-Demo" --add-bsp-name APP_CY8CKIT-062-BLE --add-bsp-version "latest-v4.X" --add-bsp-location "local" | |
| library-manager-cli --project "C:/mtb_projects/MyUI-Demo" --set-active-bsp APP_CY8CKIT-062-BLE | |
| ``` | |
| </details> | |
| <details><summary><b>In third-party IDEs</b></summary> | |
| Use one of the following options: | |
| - **Use the standalone [Project Creator](https://www.infineon.com/ModusToolboxProjectCreator) tool:** | |
| 1. Launch Project Creator from the Windows Start menu or from *{ModusToolbox™ software install directory}/tools_{version}/project-creator/project-creator.exe*. | |
| 2. In the initial **Choose Board Support Package** screen, select the BSP, and click **Next**. | |
| 3. In the **Select Application** screen, select the appropriate IDE from the **Target IDE** drop-down menu. | |
| 4. Click **Create** and follow the instructions printed in the bottom pane to import or open the exported project in the respective IDE. | |
| <br> | |
| - **Use command-line interface (CLI):** | |
| 1. Follow the instructions from the **In command-line interface (CLI)** section to create the application. | |
| 2. Export the application to a supported IDE using the `make <ide>` command. | |
| 3. 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™ user guide](https://www.infineon.com/ModusToolboxUserGuide) (locally available at *{ModusToolbox™ software 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. 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: | |
| <details><summary><b>Using Eclipse IDE for ModusToolbox™ software</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>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> | |
| 4. After programming, the application starts automatically. observe the messages on the UART terminal, and wait for the device to make all the required connections. Use the KitProg3 COM port to view the Bluetooth stack and application trace messages in the terminal window as shown in Figure 1. | |
| **Figure 1. Terminal log messages on KitProg3 COM port** | |
|  | |
| ### Test using AIROC™ Bluetooth® Connect mobile app | |
| 1. Turn ON Bluetooth® on your Android or iOS device. | |
| 2. Launch the AIROC™ Bluetooth® Connect app. | |
| 3. Press the reset switch on the CY8CKIT-062-BLE kit to start sending advertisements. The orange LED (LED8) starts blinking. | |
| 4. Swipe down on the AIROC™ Bluetooth® Connect app home screen to start scanning for Bluetooth® LE Peripherals; your device (“Bluetooth UI Demo”) appears in the AIROC™ Bluetooth® Connect app home screen. Select your device to establish a Bluetooth® LE connection. The orange LED (LED8) stops blinking after connection is established. | |
| **Figure 2. Connect with the AIROC™ Bluetooth® Connect app on iOS** | |
|  | |
| 5. AIROC™ Bluetooth® Connect carousel view view shows all the available services. Swipe to move among them. See Figure 2. | |
| 6. Select **RGB LED Service** to show the RGB LED UI view. Adjust the color and intensity. The RGB LED on the board changes the color or intensity accordingly. | |
| **Figure 3. RGB LED Service** | |
|  | |
| 7. Select **Health Thermometer Service** to display the Thermometer UI view that shows the body temperature. Press the user button (SW2) on the board to update the temperature value. This also updates the temperature value on the E-INK display. | |
| **Figure 4. Health Thermometer Service** | |
|  | |
| 8. Select **CAPSENSE™ Services** to display the CAPSENSE™ button and CAPSENSE™ slider views. Do the following: | |
| 1. Open the CAPSENSE™ Button view. | |
| 2. Touch Button 0 or Button 1 on the board to change the button graphic on the app screen. Observe that the orange LED status is toggled ON/OFF. | |
| 3. Open the CAPSENSE™ Slider view. | |
| 4. Touch the slider on the board to change the the slider graphic pattern on the app screen. Observe that the brightness of the Orange LED changes with the slider position. | |
| **Figure 5. CAPSENSE™ button and slider** | |
|  | |
| 6. At any time press the user button (SW2) to update the E-INK display. It updates the temperature values over Bluetooth® GATT Indication. | |
| **Figure 6. E-INK display** | |
|  | |
| ## Debugging | |
| You can debug the example to step through the code. In the 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™ software user guide](https://www.infineon.com/MTBEclipseIDEUserGuide). | |
| **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](https://community.infineon.com/docs/DOC-21143) to learn about this and for the workaround. | |
| ## Design and implementation | |
| This code example implements a Bluetooth® GATT Server and GAP Peripheral role, ADC, SPI, and PWM on the PSoC™ 6 MCU. Once the device is powered ON, it boots up and does the following: | |
| 1. Initializes the Bluetooth® stack | |
| 2. Initializes UART | |
| 3. Initializes SPI for the E-INK display and ADC for the thermistor | |
| 4. Registers a button interrupt | |
| 5. Initializes the notification and indication timer | |
| 6. Registers the GATT database and GATT events callback | |
| 7. Initializes the E-INK display, CAPSENSE™, and thermistor | |
| 8. Starts undirected advertisements | |
| After this sequence is completed, the device can connect to a GAP Central device. Upon connection, the device will request connection parameters to be updated (specifically, the connection interval to 100 ms). If the request is accepted, the connection interval changes to 100 ms. | |
| The GAP Central device can now discover all attributes and enable GATT notifications. The Peripheral will start sending sensor values with the defined interval. Moving the board changes the values in the console output. | |
| The GATT Server implements a custom service with a custom characteristic. This characteristic is readable and notifiable. | |
| **Table 1. Application resources** | |
| | File name | comments | | |
| |-----------------------------------|-------------------------------------------------------| | |
| |*main.c* | Contains the functions to create FreeRTOS tasks for E-INK, CAPSENSE™, and Bluetooth® LE functionality. This is the entry point for execution of the user application code after device startup.| | |
| |*cycfg_gatt_db.c, cycfg_gatt_db.h*| Files in the *GeneratedSource* folder under the application folder. They contain the GATT database information generated using the Bluetooth® Configurator tool.| | |
| |*bt_app.c, bt_app.h*|Contain the code for the Bluetooth® stack event handler functions | | |
| |*eink_shield.c, eink_shield.h* |Contain the code for E-INK and thermistor functionality| | |
| |*capsense.c, capsense.h* |Contain the code for CAPSENSE™ functionality| | |
| |*board.c, board.h* |Contain the code for controlling the LEDs with PWM and handling button events| | |
| **Figure 7. Application flowchart** | |
|  | |
| <br> | |
| ### Resources and settings | |
| - **Device Configurator:** ModusToolbox™ stores the device configuration settings of the application in the *design.modus* file. This file is used by the Device Configurator, which generate the configuration firmware. This file is stored in the respective kit BSP folder in the *mtb_shared* project. For example, for CY8CKIT-062-BLE, the path is *<workspace_path>mtb_shared\TARGET_CY8CKIT-062-BLE\latest-v3.X\COMPONENT_BSP_DESIGN_MODUS/design.modus*. | |
| See the [Device Configurator guide](https://www.infineon.com/dgdl/Infineon-ModusToolbox_Device_Configurator_Guide_4-UserManual-v01_00-EN.pdf?fileId=8ac78c8c7d718a49017d99ab297631cb&utm_source=cypress&utm_medium=referral&utm_campaign=202110_globe_en_all_integration-files). | |
| - **Bluetooth® Configurator:** The Bluetooth® Peripheral has an additional configurator called the “Bluetooth® Configurator” that is used to generate the Bluetooth® LE GATT database and various Bluetooth® settings for the application. These settings are stored in the file named *design.cybt*. Note that unlike the Device Configurator, the Bluetooth® Configurator settings and files are local to each respective application. As explained in the [Design and implementation](#design-and-implementation) section, the only extra service added is the Immediate Alert Service (IAS). | |
| See the [Bluetooth® Configurator guide](https://www.infineon.com/dgdl/Infineon-ModusToolbox_Bluetooth_Configurator_Guide_3-UserManual-v01_00-EN.pdf?fileId=8ac78c8c7d718a49017d99aaf5b231be&utm_source=cypress&utm_medium=referral&utm_campaign=202110_globe_en_all_integration-files). | |
| ## Related resources | |
| Resources | Links | |
| -----------|---------------------------------- | |
| Application notes | [AN228571](https://www.infineon.com/AN228571) – Getting started with PSoC™ 6 MCU on ModusToolbox™ software <br> [AN215656](https://www.infineon.com/AN215656) – PSoC™ 6 MCU: Dual-CPU system design <br> [AN85951](https://www.infineon.com/AN85951) – PSoC™ 4 and PSoC™ 6 MCU CAPSENSE™ design guide | |
| Code examples | [Using ModusToolbox™ software](https://github.com/Infineon/Code-Examples-for-ModusToolbox-Software) on GitHub | |
| Device documentation | [PSoC™ 6 MCU datasheets](https://documentation.infineon.com/html/psoc6/bnm1651211483724.html) <br> [PSoC™ 6 technical reference manuals](https://documentation.infineon.com/html/psoc6/zrs1651212645947.html) | |
| 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) | |
| Libraries on GitHub | [mtb-pdl-cat1](https://github.com/Infineon/mtb-pdl-cat1) – PSoC™ 6 Peripheral Driver Library (PDL) <br> [mtb-hal-cat1](https://github.com/Infineon/mtb-hal-cat1) – Hardware Abstraction Layer (HAL) library <br> [retarget-io](https://github.com/Infineon/retarget-io) – Utility library to retarget STDIO messages to a UART port | |
| Middleware on GitHub | [capsense](https://github.com/Infineon/capsense) – CAPSENSE™ library and documents <br> [psoc6-middleware](https://github.com/Infineon/modustoolbox-software#psoc-6-middleware-libraries) – Links to all PSoC™ 6 MCU middleware | |
| Tools | [Eclipse IDE for ModusToolbox™ software](https://www.infineon.com/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. | |
| <br> | |
| ## 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 PSoC™ 6 MCU devices, see [How to design with PSoC™ 6 MCU – KBA223067](https://community.infineon.com/docs/DOC-14644) in the Infineon Developer community. | |
| ## Document history | |
| Document title: *CE238053* – *Bluetooth® LE UI Demo* | |
| | Version | Description of change | | |
| | ------- | --------------------- | | |
| | 1.0.0 | New code example. | | |
| ------ | |
| --------------------------------------------------------- | |
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| <br /> | |
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