101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
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/** @addtogroup gpio_defines
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*
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* @brief <b>Access functions for the SAM4 I/O Controller</b>
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* @ingroup SAM4_defines
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* LGPL License Terms @ref lgpl_license
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* @author @htmlonly © @endhtmlonly 2016
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* Maxim Sloyko <maxims@google.com>
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*
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2012 Gareth McMullin <gareth@blacksphere.co.nz>
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* Copyright (C) 2014 Felix Held <felix-libopencm3@felixheld.de>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/sam/gpio.h>
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/** @brief Atomic set output
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*
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* @param[in] gpioport uint32_t: GPIO Port base address
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* @param[in] gpios uint32_t
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*/
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void gpio_set(uint32_t gpioport, uint32_t gpios)
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{
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GPIO_OVRS(gpioport) = gpios;
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}
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/** @brief Atomic clear output
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*
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* @param[in] gpioport uint32_t: GPIO Port base address
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* @param[in] gpios uint32_t
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*/
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void gpio_clear(uint32_t gpioport, uint32_t gpios)
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{
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GPIO_OVRC(gpioport) = gpios;
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}
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/** @brief Atomic toggle output
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*
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* @param[in] gpioport uint32_t: GPIO Port base address
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* @param[in] gpios uint32_t
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*/
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void gpio_toggle(uint32_t gpioport, uint32_t gpios)
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{
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GPIO_OVRT(gpioport) = gpios;
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}
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/** @brief Enable output pins.
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*
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* Onlyc the ones where bits are set to "1" are touched, everything else
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* remains in the old state.
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*
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* @param[in] gpioport uint32_t: GPIO Port base address
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* @param[in] gpios uint32_t
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* @param[in] mode enum gpio_mode GPIO mode. IN, OUT or peripheral function.
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*/
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void gpio_enable(uint32_t gpioport, uint32_t gpios, enum gpio_mode mode)
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{
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if (mode < GPIO_MODE_IN) {
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GPIO_GPERC(gpioport) = gpios;
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uint8_t i = 0;
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for (; i < 3; ++i, mode >>= 1) {
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GPIO_PMR_SETVAL(gpioport, i, mode & 1) = gpios;
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}
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} else if (mode == GPIO_MODE_OUT) {
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GPIO_GPERS(gpioport) = gpios;
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GPIO_ODERS(gpioport) = gpios;
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} else if (mode == GPIO_MODE_IN) {
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GPIO_GPERS(gpioport) = gpios;
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GPIO_ODERC(gpioport) = gpios;
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}
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}
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/** @brief Disable output pins.
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*
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* Onlyc the ones where bits are set to "1" are touched, everything else
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* remains in the old state.
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*
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* @param[in] gpioport uint32_t: GPIO Port base address
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* @param[in] gpios uint32_t
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*/
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void gpio_disable(uint32_t gpioport, uint32_t gpios)
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{
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GPIO_GPERC(gpioport) = gpios;
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}
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