107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief STM32 GPIO control interface.
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*/
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#ifndef GPIO_STM32_H
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#define GPIO_STM32_H
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#include <io/stm32.h>
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/**
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* GPIO mode
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* \{
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*/
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enum
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{
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GPIO_MODE_AIN = 0x0,
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GPIO_MODE_IN_FLOATING = 0x04,
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GPIO_MODE_IPD = 0x28,
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GPIO_MODE_IPU = 0x48,
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GPIO_MODE_OUT_OD = 0x14,
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GPIO_MODE_OUT_PP = 0x10,
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GPIO_MODE_AF_OD = 0x1C,
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GPIO_MODE_AF_PP = 0x18,
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};
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/*\}*/
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/**
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* GPIO speed
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*\{
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*/
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enum
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{
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GPIO_SPEED_10MHZ = 1,
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GPIO_SPEED_2MHZ,
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GPIO_SPEED_50MHZ,
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};
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/*\}*/
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/**
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* Write a value to the specified pin(s)
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*
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* \param base gpio register address
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* \param pins mask of pins that we want set or clear
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* \param val true to set selected pins of false to clear they.
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*/
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INLINE void stm32_gpioPinWrite(struct stm32_gpio *base, uint16_t pins, bool val)
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{
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if (val)
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base->BSRR |= pins;
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else
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base->BRR |= pins;
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}
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/**
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* Read a value from the specified pin(s)
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*
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* \param base gpio register address
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* \param pins mask of pins that we want read
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*/
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INLINE uint16_t stm32_gpioPinRead(struct stm32_gpio *base, uint16_t pins)
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{
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return (base->IDR & pins);
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}
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/**
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* Initialize a GPIO peripheral configuration
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*
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* \param base gpio register address
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* \param pins mask of pins that we want to configure
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* \param mode select the behaviour of selected pins
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* \param speed clock frequency for selected gpio ports
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*/
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int stm32_gpioPinConfig(struct stm32_gpio *base, uint16_t pins, uint8_t mode, uint8_t speed);
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#endif /* GPIO_STM32_H */
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