usbtest/libopencm3/lib/vf6xx/gpio.c

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/** @defgroup VF6xx_gpio GPIO
*
* @ingroup VF6xx
*
* @section vf6xx_gpio_api_ex GPIO API.
*
* @brief <b>VF6xx General-Purpose Input/Output (GPIO)</b>
*
* @author @htmlonly &copy; @endhtmlonly 2014 Stefan Agner <stefan@agner.ch>
*
* @date 03 July 2014
*
* This library supports the GPIO module in the VF6xx SoC of Freescale.
* Access is provided by GPIO number according to the Pinmux list of the
* Reference Manual, similar as GPIOs are available on Linux.
*
* LGPL License Terms @ref lgpl_license
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2014 Stefan Agner <stefan@agner.ch>
*
* 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/vf6xx/gpio.h>
#include <libopencm3/vf6xx/ccm.h>
/*---------------------------------------------------------------------------*/
/** @brief Set GPIO
Set GPIO by GPIO number according to MUX list
@param[in] gpio unsigned 32 bit. GPIO number
*/
void gpio_set(uint32_t gpio)
{
uint32_t port = GPIO(gpio / 32);
GPIO_PSOR(port) = GPIO_OFFSET(gpio);
}
/*---------------------------------------------------------------------------*/
/** @brief Set GPIO
Clears GPIO by GPIO number according to MUX list
@param[in] gpio unsigned 32 bit. GPIO number
*/
void gpio_clear(uint32_t gpio)
{
uint32_t port = GPIO(gpio / 32);
GPIO_PCOR(port) = GPIO_OFFSET(gpio);
}
/*---------------------------------------------------------------------------*/
/** @brief Get GPIOs logic state
Get logic level of GPIO given by GPIO number according to MUX list. Reading
a GPIO value is possible even if the port is not muxed for GPIO.
@param[in] gpio unsigned 32 bit. GPIO number
@returns the logic state of the given GPIO.
*/
bool gpio_get(uint32_t gpio)
{
uint32_t port = GPIO(gpio / 32);
return !!(GPIO_PDIR(port) & GPIO_OFFSET(gpio));
}
/*---------------------------------------------------------------------------*/
/** @brief Toggles GPIO
Toggles GPIO by GPIO number according to MUX list
@param[in] gpio unsigned 32 bit. GPIO number
*/
void gpio_toggle(uint32_t gpio)
{
uint32_t port = GPIO(gpio / 32);
GPIO_PTOR(port) = GPIO_OFFSET(gpio);
}
/*---------------------------------------------------------------------------*/
/** @brief Read a whole GPIO Port
Gets all 32 GPIOs of a Port.
@param[in] gpioport unsigned 32 bit. GPIO port @ref gpio_reg_base
@returns the logic states of the given GPIO port.
*/
uint32_t gpio_port_read(uint32_t gpioport)
{
return GPIO_PDIR(gpioport);
}
/*---------------------------------------------------------------------------*/
/** @brief Write a whole GPIO Port
Sets all 32 GPIOs of a Port.
@param[in] gpioport unsigned 32 bit. GPIO port @ref gpio_reg_base
@param[in] gpio unsigned 32 bit. 1 for a logic 1 driven at port, 0 for a logic
0 driven at port.
*/
void gpio_port_write(uint32_t gpioport, uint32_t data)
{
GPIO_PDOR(gpioport) = data;
}
/**@}*/