2b1ddc8490
The original submitter of this squished everything into one series, and has not returned. The code mostly appears good, and review comments were followed for the most part. The project doesn't really maintain any testing or board farm for sam3/sam4 parts, so we're going to just trust our users. Reviewed-by: Karl Palsson <karlp@tweak.net.au> sam/4l: IRQ Configuration file (irq.json) sam/4l: Basic Memory Map. sam/4l: GPIO Defines. sam/4l: GPIO Functions Added everything that needed to compile the library: Makefile, Linker Script and common includes. sam/4l: SCIF function to start OSC. sam/4l: GPIO Enable/Disable and Multiplexing configuration functions. sam/4l: PLL Clock configuration. sam/4l: Peripheral clock configuration and basic USART support. sam: USART Character length configuration. sam/4l: Generic Clock configuration functions. sam/4l: Analog to Digital Converter Interface (ADCIFE) basic support.
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/** @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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