You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.0 KiB
73 lines
2.0 KiB
/** @addtogroup gpio_defines
|
|
*
|
|
* @brief <b>Access functions for the SAM3A/U/X I/O Controller</b>
|
|
* @ingroup SAM3_defines
|
|
* LGPL License Terms @ref lgpl_license
|
|
* @author @htmlonly © @endhtmlonly 2012
|
|
* Gareth McMullin <gareth@blacksphere.co.nz>
|
|
* @author @htmlonly © @endhtmlonly 2014
|
|
* Felix Held <felix-libopencm3@felixheld.de>
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2012 Gareth McMullin <gareth@blacksphere.co.nz>
|
|
* Copyright (C) 2014 Felix Held <felix-libopencm3@felixheld.de>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <libopencm3/sam/gpio.h>
|
|
|
|
|
|
/** @brief Initialize GPIO pins
|
|
*
|
|
* @param[in] port uint32_t: GPIO Port base address
|
|
* @param[in] pins uint32_t bitfield of pins to initialize
|
|
* @param[in] flags enum gpio_flags
|
|
*/
|
|
void gpio_init(uint32_t port, uint32_t pins, enum gpio_flags flags)
|
|
{
|
|
switch (flags & 0x7) {
|
|
case GPIO_FLAG_GPINPUT:
|
|
PIO_ODR(port) = pins;
|
|
PIO_PER(port) = pins;
|
|
break;
|
|
case GPIO_FLAG_GPOUTPUT:
|
|
PIO_OER(port) = pins;
|
|
PIO_PER(port) = pins;
|
|
break;
|
|
case GPIO_FLAG_PERIPHA:
|
|
PIO_ABSR(port) &= ~pins;
|
|
PIO_PDR(port) = pins;
|
|
break;
|
|
case GPIO_FLAG_PERIPHB:
|
|
PIO_ABSR(port) |= pins;
|
|
PIO_PDR(port) = pins;
|
|
}
|
|
|
|
if (flags & GPIO_FLAG_OPEN_DRAIN) {
|
|
PIO_MDER(port) = pins;
|
|
} else {
|
|
PIO_MDDR(port) = pins;
|
|
}
|
|
|
|
if (flags & GPIO_FLAG_PULL_UP) {
|
|
PIO_PUER(port) = pins;
|
|
} else {
|
|
PIO_PUDR(port) = pins;
|
|
}
|
|
}
|
|
|