mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-04 05:18:01 +02:00
Kevin Thomas
afdc1fa594
- GPIO15 active-low button input with internal pull-up - 20ms software debounce via busy-wait confirmation - LED mirrors button state, UART reports edge transitions - New gpio_config_input_pullup() in GPIO driver - 1555B FLASH, 13 source files, zero warnings
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/**
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******************************************************************************
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* @file rp2350_button.h
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* @author Kevin Thomas
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* @brief Button input driver header for RP2350.
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*
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* Push-button GPIO input driver with software debounce.
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* The button pin is configured as active-low with internal
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* pull-up; pressing the button connects the pin to GND.
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 Kevin Thomas.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#ifndef __RP2350_BUTTON_H
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#define __RP2350_BUTTON_H
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#include "rp2350.h"
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/**
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* @brief Initialize a GPIO pin as an active-low button input with pull-up.
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* @param pin GPIO pin number to configure as a button input
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* @param debounce_ms debounce settling time in milliseconds
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* @retval None
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*/
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void button_init(uint32_t pin, uint32_t debounce_ms);
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/**
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* @brief Read the debounced state of the button.
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* @param pin GPIO pin number previously initialized with button_init()
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* @retval bool true if the button is firmly pressed, false if released
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*/
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bool button_is_pressed(uint32_t pin);
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#endif /* __RP2350_BUTTON_H */
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