ADC Basic

This code example demonstrates the implementation of a basic ADC application that reads analog values from a potentiometer and displays the results over UART. The ADC continuously samples the input voltage and converts the digital value to a voltage reading (0-1V range).

View this README on GitHub.

Provide feedback on this code example.

Requirements

• ModusToolbox™ v3.6 or later (tested with v3.6)
• Board support package (BSP) minimum required version: v3.0.0
• Programming language: C
• Associated parts: CYW955913EVK-01

Supported toolchains (make variable 'TOOLCHAIN')

• GNU Arm® Embedded Compiler v14.2.1 (GCC_ARM) – Default value of TOOLCHAIN

Supported kits (make variable 'TARGET')

• CYW955913EVK-01 Wi-Fi Bluetooth® Prototyping Kit (CYW955913EVK-01) – Default value of TARGET

Hardware setup

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

Software setup

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

Install a terminal emulator if you don't have one. Instructions in this document use Tera Term.

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

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 (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.

   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.

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-btstack-threadx-adc-basic" application with the desired name "ADC" configured for the CYW955913EVK-01 BSP into the specified working directory, C:/mtb_projects:

project-creator-cli --board-id CYW955913EVK-01 --app-id mtb-example-btstack-threadx-adc-basic --user-app-name ADC --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).

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

ADC Basic Application

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 using the following parameters:

   Baud rate: 115200 bps; Data: 8 bits; Parity: None; Stop: 1 bit; Flow control: None; New line for receive data: Line Feed(LF) or Auto setting

3. 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

   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
   

4. After programming, reset the board to start the application.

5. Adjust the potentiometer on the evaluation kit to change the analog input voltage.

6. Observe the ADC readings and corresponding voltage values displayed on the terminal. The output will continuously update every second showing:

   • Raw ADC value (0-32767)
   • Converted voltage (0.000V - 1.000V)

   Figure 1. Terminal output on program startup

   

7. The ADC continuously samples the voltage drop across the potentiometer and displays the results in real-time through the UART terminal.

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

Note: The ctss_pad_configParamInit() and ctss_pad_configure() functions are used to route the analog signal from the GPIO pin to the ADC input. These PDL functions are necessary to configure the pad and connect it to the ADC's multiplexer.

Resources and settings

This section explains the ModusToolbox™ resources and their configurations as used in this code example. Note that all the configurations explained in this section have already been done in the code example.

Table 1. Application resources

Resource	Alias/Object	Purpose
ADC (HAL)	adc_obj	ADC peripheral for analog-to-digital conversion
ADC Channel	adc_chan_0_obj	ADC channel for potentiometer input
UART (HAL)	cy_retarget_io	UART for debug output and trace messages
GPIO (HAL)	CYBSP_D11	Potentiometer analog input (ADC input)

• Device Configurator: The Device Configurator is used to enable or configure the peripherals and the pins used in the application. See Device Configurator guide.

Related resources

Resources	Links
Application notes	Contact Infineon Support for device application notes
Code examples	Using ModusToolbox™ on GitHub
Device documentation	Contact Infineon Support for device documentation.
Libraries on GitHub	mtb-pdl-cat5 – Peripheral Driver Library (PDL) mtb-hal-cat5 – Hardware Abstraction Layer (HAL) library retarget-io – Utility library to retarget STDIO messages to a UART port threadx- threadx OS library and docs
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: CE242391 - ADC Basic Application

Version	Description of change
1.0.0	New code example

All referenced product or service names and trademarks are the property of their respective owners.

---

(c) 2026, Infineon Technologies AG, or an affiliate of Infineon Technologies AG. All rights reserved. This software, associated documentation and materials ("Software") is owned by Infineon Technologies AG or one of its affiliates ("Infineon") and is protected by and subject to worldwide patent protection, worldwide copyright laws, and international treaty provisions. Therefore, you may use this Software only as provided in the license agreement accompanying the software package from which you obtained this Software. If no license agreement applies, then any use, reproduction, modification, translation, or compilation of this Software is prohibited without the express written permission of Infineon.
Disclaimer: UNLESS OTHERWISE EXPRESSLY AGREED WITH INFINEON, THIS SOFTWARE IS PROVIDED AS-IS, WITH NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ALL WARRANTIES OF NON-INFRINGEMENT OF THIRD-PARTY RIGHTS AND IMPLIED WARRANTIES SUCH AS WARRANTIES OF FITNESS FOR A SPECIFIC USE/PURPOSE OR MERCHANTABILITY. Infineon reserves the right to make changes to the Software without notice. You are responsible for properly designing, programming, and testing the functionality and safety of your intended application of the Software, as well as complying with any legal requirements related to its use. Infineon does not guarantee that the Software will be free from intrusion, data theft or loss, or other breaches (“Security Breaches”), and Infineon shall have no liability arising out of any Security Breaches. Unless otherwise explicitly approved by Infineon, the Software may not be used in any application where a failure of the Product or any consequences of the use thereof can reasonably be expected to result in personal injury.