115 lines
4.4 KiB
C
115 lines
4.4 KiB
C
/*
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* easygpio.h
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*
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* Copyright (c) 2015, eadf (https://github.com/eadf)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef EASYGPIO_INCLUDE_EASYGPIO_EASYGPIO_H_
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#define EASYGPIO_INCLUDE_EASYGPIO_EASYGPIO_H_
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#include "c_types.h"
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typedef enum {
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EASYGPIO_INPUT=0,
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EASYGPIO_OUTPUT=1
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} EasyGPIO_PinMode;
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typedef enum {
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EASYGPIO_PULLUP=3,
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EASYGPIO_NOPULL=4
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} EasyGPIO_PullStatus;
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/**
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* Returns the gpio name and func for a specific pin.
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*/
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bool easygpio_getGPIONameFunc(uint8_t gpio_pin, uint32_t *gpio_name, uint8_t *gpio_func);
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/**
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* Sets the 'gpio_pin' pin as a GPIO and sets the interrupt to trigger on that pin.
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* The 'interruptArg' is the function argument that will be sent to your interruptHandler
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* (this way you can several interrupts with one interruptHandler)
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*/
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bool easygpio_attachInterrupt(uint8_t gpio_pin, EasyGPIO_PullStatus pullStatus, void (*interruptHandler)(void *arg), void *interruptArg);
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/**
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* Deatach the interrupt handler from the 'gpio_pin' pin.
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*/
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bool easygpio_detachInterrupt(uint8_t gpio_pin);
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/**
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* Returns the number of active pins in the gpioMask.
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*/
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uint8_t easygpio_countBits(uint32_t gpioMask);
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/**
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* Sets the 'gpio_pin' pin as a GPIO and enables/disables the pull-up on that pin.
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* 'pullStatus' has no effect on output pins or GPIO16
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*/
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bool easygpio_pinMode(uint8_t gpio_pin, EasyGPIO_PullStatus pullStatus, EasyGPIO_PinMode pinMode);
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/**
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* Enable or disable the internal pull up for a pin.
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*/
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bool easygpio_pullMode(uint8_t gpio_pin, EasyGPIO_PullStatus pullStatus);
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/**
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* Uniform way of getting GPIO input value. Handles GPIO 0-16.
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* The pin must be initiated with easygpio_pinMode() so that the pin mux is setup as a gpio in the first place.
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* If you know that you won't be using GPIO16 then you'd better off by just using GPIO_INPUT_GET().
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*/
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uint8_t easygpio_inputGet(uint8_t gpio_pin);
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/**
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* Uniform way of setting GPIO output value. Handles GPIO 0-16.
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*
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* You can not rely on that this function will switch the gpio to an output like GPIO_OUTPUT_SET does.
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* Use easygpio_outputEnable() to change an input gpio to output mode.
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*/
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void easygpio_outputSet(uint8_t gpio_pin, uint8_t value);
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/**
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* Uniform way of turning an output GPIO pin into input mode. Handles GPIO 0-16.
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* The pin must be initiated with easygpio_pinMode() so that the pin mux is setup as a gpio in the first place.
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* This function does the same thing as GPIO_DIS_OUTPUT, but works on GPIO16 too.
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*/
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void easygpio_outputDisable(uint8_t gpio_pin);
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/**
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* Uniform way of turning an input GPIO pin into output mode. Handles GPIO 0-16.
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* The pin must be initiated with easygpio_pinMode() so that the pin mux is setup as a gpio in the first place.
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*
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* This function:
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* - should only be used to convert a input pin into an output pin.
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* - is a little bit slower than easygpio_outputSet() so you should use that
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* function to just change output value.
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* - does the same thing as GPIO_OUTPUT_SET, but works on GPIO16 too.
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*/
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void easygpio_outputEnable(uint8_t gpio_pin, uint8_t value);
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#endif /* EASYGPIO_INCLUDE_EASYGPIO_EASYGPIO_H_ */
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