forked from Archive/PX4-Autopilot
108 lines
3.9 KiB
C
108 lines
3.9 KiB
C
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/****************************************************************************
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*
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* Copyright (C) 2012 PX4 Development Team. 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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/**
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* @file GPIO driver interface.
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*
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* This header defines the basic interface to platform-specific GPIOs.
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*/
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#ifndef _BOARD_DRV_GPIO_H
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#define _BOARD_DRV_GPIO_H
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/*
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* PX4FMU GPIO numbers.
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*
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* For shared pins, alternate function 1 selects the non-GPIO mode
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* (USART2, CAN2, etc.)
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*/
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#define GPIO_EXT_1 (1<<0) /**< high-power GPIO 1 */
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#define GPIO_EXT_2 (1<<1) /**< high-power GPIO 1 */
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#define GPIO_MULTI_1 (1<<2) /**< USART2 CTS */
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#define GPIO_MULTI_2 (1<<3) /**< USART2 RTS */
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#define GPIO_MULTI_3 (1<<4) /**< USART2 TX */
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#define GPIO_MULTI_4 (1<<5) /**< USART2 RX */
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#define GPIO_CAN_TX (1<<6) /**< CAN2 TX */
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#define GPIO_CAN_RX (1<<7) /**< CAN2 RX */
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/**
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* Default GPIO device - other devices may also support this protocol if
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* they also export GPIO-like things. This is always the GPIOs on the
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* main board.
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*/
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#define GPIO_DEVICE_PATH "/dev/gpio"
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/*
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* IOCTL definitions.
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*
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* For all ioctls, the (arg) argument is a bitmask of GPIOs to be affected
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* by the operation, with the LSB being the lowest-numbered GPIO.
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*
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* Note that there may be board-specific relationships between GPIOs;
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* applications using GPIOs should be aware of this.
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*/
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#define _GPIOCBASE 0x6700
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#define GPIOC(_x) _IOC(_GPIOCBASE, _x)
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/** reset all board GPIOs to their default state */
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#define GPIO_RESET GPIOC(0)
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/** configure the board GPIOs in (arg) as outputs */
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#define GPIO_SET_OUTPUT GPIOC(1)
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/** configure the board GPIOs in (arg) as inputs */
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#define GPIO_SET_INPUT GPIOC(2)
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/** configure the board GPIOs in (arg) for the first alternate function (if supported) */
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#define GPIO_SET_ALT_1 GPIOC(3)
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/** configure the board GPIO (arg) for the second alternate function (if supported) */
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#define GPIO_SET_ALT_2 GPIOC(4)
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/** configure the board GPIO (arg) for the third alternate function (if supported) */
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#define GPIO_SET_ALT_3 GPIOC(5)
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/** configure the board GPIO (arg) for the fourth alternate function (if supported) */
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#define GPIO_SET_ALT_4 GPIOC(6)
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/** set the GPIOs in (arg) */
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#define GPIO_SET GPIOC(10)
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/** clear the GPIOs in (arg) */
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#define GPIO_CLEAR GPIOC(11)
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/** read all the GPIOs and return their values in *(uint32_t *)arg */
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#define GPIO_GET GPIOC(12)
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#endif /* _DRV_GPIO_H */
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