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73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/*
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* gpio.h
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*
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* Created on: Nov 14, 2020
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* Author: Doug
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*
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* Copyright (C) 2011-2020 Doug Brown
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef HAL_GPIO_H_
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#define HAL_GPIO_H_
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#include <stdint.h>
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#include <stdbool.h>
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/// Creates a temporary GPIOPin struct. Used when assigning to a GPIOPin variable.
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#define GPIO_PIN(port, pin) ((GPIOPin){port, pin})
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/// A NULL GPIO pin
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#define GPIO_PIN_NULL ((GPIOPin){0xFF, 0xFF})
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/// The GPIO pin struct
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typedef struct GPIOPin
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{
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/// The port the pin belongs to
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uint8_t port;
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/// The index of the pin on the port
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uint8_t pin;
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} GPIOPin;
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void GPIO_SetDirection(GPIOPin pin, bool output);
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void GPIO_SetPullup(GPIOPin pin, bool pullup);
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void GPIO_SetOn(GPIOPin pin);
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void GPIO_SetOff(GPIOPin pin);
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void GPIO_Toggle(GPIOPin pin);
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bool GPIO_Read(GPIOPin pin);
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/** Sets whether a GPIO pin is outputting high or low
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*
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* @param pin The pin
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* @param on True if it's high, false if it's low
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*/
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static inline void GPIO_Set(GPIOPin pin, bool on)
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{
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on ? GPIO_SetOn(pin) : GPIO_SetOff(pin);
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}
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/** Determines if a GPIO pin is null
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*
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* @param pin The pin
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* @return True if it's null, false if not
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*/
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static inline bool GPIO_IsNull(GPIOPin pin)
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{
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return pin.pin == 0xFF && pin.port == 0xFF;
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}
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#endif /* HAL_GPIO_H_ */
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