FelipeMdeO opened a new pull request, #18368: URL: https://github.com/apache/nuttx/pull/18368
*Note: Please adhere to [Contributing Guidelines](https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md).* ## Summary Add a generic keyboard matrix (kmatrix) lower-half driver with polling/debounce, plus an STM32 GPIO board adapter and public API to expose `/dev/kbdN`. Include a 4x3 keypad keymap example and documentation/test helper. I2C interface to used keypad was done but not tested yet. The IRQ feature will be done as soon as possible. This is a first step development. This change solve this request: https://github.com/apache/nuttx-apps/issues/1764 Please @acassis , help me to verify if I followed all standards. ## Impact Optional input driver; no behavior change unless enabled. Enabling kmatrix adds periodic GPIO scanning and keyboard events on `/dev/kbd0`. ## Testing Host: Ubuntu 24.04.3 LTS x86_64. Board: STM32F4Discovery + 4x3 membrane keypad (GPIO). See picture of keypad used below: <img width="380" height="315" alt="image" src="https://github.com/user-attachments/assets/8bb9bab6-2c14-4c8a-8baa-122ee79ce6c6"; /> Build: `stm32f4discovery:nsh` with: - `CONFIG_INPUT=y` - `CONFIG_INPUT_KMATRIX=y` - `CONFIG_EXAMPLES_KEYBOARD=y` - `CONFIG_EXAMPLES_KEYBOARD_DEVPATH="/dev/kbd0"` - `CONFIG_INPUT_KMATRIX_POLL_MS=10` (default) - `CONFIG_INPUT_KMATRIX_DEBOUNCE=3` (default) - `CONFIG_INPUT_KMATRIX_BUFSIZE=64` (default) Runtime: Ran `kbd` and observed key press/release events. Logs: ``` nsh> kbd kbd_main: nsamples: 0 kbd_main: Opening /dev/kbd0 Sample : code : 49 type : 0 Sample : code : 49 type : 1 Sample : code : 50 type : 0 Sample : code : 50 type : 1 Sample : code : 51 type : 0 Sample : code : 51 type : 1 Sample : code : 52 type : 0 Sample : code : 52 type : 1 Sample : code : 53 type : 0 Sample : code : 53 type : 1 Sample : code : 54 type : 0 Sample : code : 54 type : 1 Sample : code : 55 type : 0 Sample : code : 55 type : 1 Sample : code : 56 type : 0 Sample : code : 56 type : 1 Sample : code : 57 type : 0 Sample : code : 57 type : 1 Sample : code : 42 type : 0 Sample : code : 42 type : 1 Sample : code : 48 type : 0 Sample : code : 48 type : 1 Sample : code : 35 type : 0 Sample : code : 35 type : 1 ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
