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85 lines
2.4 KiB
85 lines
2.4 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef GPIO_H_
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#define GPIO_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stdbool.h>
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enum GpioMode
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{
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GPIO_MODE_IN = 0,
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GPIO_MODE_OUT,
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GPIO_MODE_ALTERNATE,
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GPIO_MODE_ANALOG,
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};
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enum GpioOpenDrainMode
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{
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GPIO_OUT_PUSH_PULL = 0,
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GPIO_OUT_OPEN_DRAIN,
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};
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enum GpioPullMode
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{
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GPIO_PULL_NONE = 0,
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GPIO_PULL_UP,
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GPIO_PULL_DOWN,
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};
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#define GPIO_SPEED_BEST_POWER -1 //all non-negative values are platform specific, YMMV
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#define GPIO_SPEED_BEST_SPEED -2
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#define GPIO_SPEED_DEFAULT -3
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#define GPIO_SPEED_1MHZ_PLUS -4
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#define GPIO_SPEED_3MHZ_PLUS -5
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#define GPIO_SPEED_5MHZ_PLUS -6
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#define GPIO_SPEED_10MHZ_PLUS -7
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#define GPIO_SPEED_15MHZ_PLUS -8
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#define GPIO_SPEED_20MHZ_PLUS -9
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#define GPIO_SPEED_30MHZ_PLUS -10
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#define GPIO_SPEED_50MHZ_PLUS -11
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#define GPIO_SPEED_100MHZ_PLUS -12
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#define GPIO_SPEED_150MHZ_PLUS -13
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#define GPIO_SPEED_200MHZ_PLUS -14
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struct Gpio;
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/* Requests a GPIO and allocates the gpio handle/struct/etc */
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struct Gpio* gpioRequest(uint32_t gpioNum);
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void gpioRelease(struct Gpio* __restrict gpio);
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/* Configures the direction and pull type of a GPIO */
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void gpioConfigInput(const struct Gpio* __restrict gpio, int32_t gpioSpeed, enum GpioPullMode pull);
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void gpioConfigOutput(const struct Gpio* __restrict gpio, int32_t gpioSpeed, enum GpioPullMode pull, enum GpioOpenDrainMode odrMode, bool value);
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void gpioConfigAlt(const struct Gpio* __restrict gpio, int32_t gpioSpeed, enum GpioPullMode pull, enum GpioOpenDrainMode odrMode, uint32_t altFunc);
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void gpioConfigAnalog(const struct Gpio* __restrict gpio);
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/* Sets and gets a value for a specific GPIO pin */
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void gpioSet(const struct Gpio* __restrict gpio, bool value);
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bool gpioGet(const struct Gpio* __restrict gpio);
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#ifdef __cplusplus
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}
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#endif
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#endif
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