This project demonstrates how to interface a SparkFun I²C Joystick with an NXP microcontroller using an I²C-based GPIO expander (PCA9554). The application initializes the hardware, configures the joystick inputs via the expander, and continuously reads the state of each joystick direction.
This example is useful as a reference for handling digital inputs over I²C using SparkFun peripherals on NXP platforms with CMSIS drivers.
- FRDM-MCXA153
- FRDM-MCXA156
- FRDM-MCXA174
- FRDM-MCXA266
- FRDM-MCXA344
- FRDM-MCXA346
- FRDM-MCXA366
- FRDM-MCXC242
- FRDM-MCXC444
- FRDM-MCXN236
- FRDM-MCXN947
- FRDM-MCXW72
- FRDM-RW612
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SparkFun Qwiic Navigation Switch
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USB Type C cable
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I²C SparkFun Qwiic connector
- Open MCUXpresso for VSCode extension.
- In Quick Start Panel window click in Application Code Hub.
- In Search text field, type the name of this example "Qwiic Joystick on FRDM MCU's".
- Select the example, update the name and select the directory where the example will be saved.
- Click Import Project and wait some minutes.
- If window appears in top side of VSCode select projects that will be imported and wait.
- Now, the projects of demo should be in projects panel.
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Solder the headers in Qwiic shield.
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Cut A4 and A5 pins of Qwiic shield.
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Connect these pins with jumpers or solder a wire.
- Connect FRDM board to computer with USB-C cable in MCU-Link port of FRDM.
- Open MCUXpresso extension in VSCode.
- Select the project "dm-qwiic-joystick-frdm-(mcu)".
- Do right click on project and select pristine build and wait about a one minute.
- Click run (play icon).
- Please wait a few seconds.
- Now click stop in center upper button.
- 115200 bps
- 8 bits
- 1 stop bit
- No parity
- No flow control
Questions regarding the content/correctness of this example can be entered as Issues within this GitHub repository.
Warning: For more general technical questions regarding NXP Microcontrollers and the difference in expected functionality, enter your questions on the NXP Community Forum
| Version | Description / Update | Date |
|---|---|---|
| 1.0 | Initial release on Application Code Hub | May 19th 2026 |
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