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- /** @defgroup gpio_file GPIO peripheral API
- * @brief SWM050 GPIO API.
- * @ingroup peripheral_apis
- * LGPL License Terms @ref lgpl_license
- * @author @htmlonly © @endhtmlonly 2019
- * Icenowy Zheng <icenowy@aosc.io>
- * @author @htmlonly © @endhtmlonly 2019
- * Caleb Szalacinski <contact@skiboy.net>
- */
- /*
- * This file is part of the libopencm3 project.
- *
- * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.io>
- * Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net>
- *
- * 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/swm050/gpio.h>
-
- /*---------------------------------------------------------------------------*/
- /** @brief Set a Group of Pins
-
- Set one or more pins of GPIO to 1. Please note that this chip doesn't support
- atomic pin setting.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_set(uint16_t gpios)
- {
- GPIO_ADATA |= gpios;
- }
-
- /*---------------------------------------------------------------------------*/
- /** @brief Clear a Group of Pins
-
- Set one or more pins of GPIO to 0. Please note that this chip doesn't support
- atomic pin setting.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_clear(uint16_t gpios)
- {
- GPIO_ADATA &= ~gpios;
- }
-
- /*---------------------------------------------------------------------------*/
- /** @brief Read a Group of Pins.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be read, use bitwise OR '|' to separate
- them.
- @return The pin values as a bitfield. The bit position of the pin
- value returned corresponds to the pin number.
- */
- uint16_t gpio_get(uint16_t gpios)
- {
- return GPIO_AEXT & gpios;
- }
-
- /*---------------------------------------------------------------------------*/
- /** @brief Toggle a Group of Pins
-
- Toggle one or more pins of GPIO. The non-toggled pins are not affected.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_toggle(uint16_t gpios)
- {
- uint32_t curr_status = GPIO_ADATA & gpios;
- GPIO_ADATA = (GPIO_ADATA & (~gpios)) | (~curr_status);
- }
-
- /*---------------------------------------------------------------------------*/
- /** @brief Set the direction of a Group of Pins to Input
-
- Set the direction of one or more pins of GPIO to input.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_input(uint16_t gpios)
- {
- GPIO_ADIR &= ~gpios;
- }
-
- /*---------------------------------------------------------------------------*/
- /** @brief Set the direction of a Group of Pins to Output
-
- Set the direction of one or more pins of GPIO to output.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_output(uint16_t gpios)
- {
- GPIO_ADIR |= gpios;
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Sets the pins as external interrupts, rather than normal GPIO
-
- Enable interrupts on the selected pins. If you want to quickly
- switch on and off interrupts, use gpio_int_mask() after calling this.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
-
- @param[in] en True to enable, false to disable.
- */
- void gpio_int_enable(uint16_t gpios, bool en)
- {
- if (en) {
- GPIO_INTEN_A |= gpios;
- } else {
- GPIO_INTEN_A &= ~gpios;
- }
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Sets bits in the interrupt mask
-
- When interrupts are masked, it prevents them from being received, which is a
- quicker way to turn on and off GPIO interrupts (after calling gpio_int_en()).
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
-
- @param[in] masked Pin mask selection @ref gpio_int_masked
- Whether to mask or unmask pins.
- */
- void gpio_int_mask(uint16_t gpios, enum gpio_int_masked masked)
- {
- if (masked) {
- GPIO_INTMASK_A |= gpios;
- } else {
- GPIO_INTMASK_A &= ~gpios;
- }
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Sets whether the pins are edge triggered or level triggered
-
- Sets whether the pins are edge triggered or level triggered. Edge-triggered
- interrupt bits must be cleared by software.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
-
- @param[in] type Trigger Type @ref gpio_trig_type
- Level or edge triggered
- */
- void gpio_int_type(uint16_t gpios, enum gpio_trig_type type)
- {
- if (type) {
- GPIO_INTLEVEL_A |= gpios;
- } else {
- GPIO_INTLEVEL_A &= ~gpios;
- }
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Sets the interrupt trigger polarity
-
- Sets whether the interrupt is triggered by a high or low level/edge.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
-
- @param[in] pol Polarity @ref gpio_pol
- High or low level/edge
- */
- void gpio_int_pol(uint16_t gpios, enum gpio_pol pol)
- {
- if (pol) {
- GPIO_INTPOLARITY_A |= gpios;
- } else {
- GPIO_INTPOLARITY_A &= ~gpios;
- }
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Gets the masked interrupt status
-
- Returns the pin interrupt status masked with the mask set
- in @ref gpio_int_mask().
-
- @return The masked pin interrupt status as a bitfield. The bit position of the
- pin value returned corresponds to the pin number.
- */
- uint16_t gpio_int_status(void)
- {
- return GPIO_INTSTAT_A;
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Gets the raw unmasked interrupt status
-
- Returns the raw unmasked interrupt status.
-
- @return The unmasked pin interrupt status as a bitfield. The bit position of the
- pin value returned corresponds to the pin number.
- */
- uint16_t gpio_int_raw_status(void)
- {
- return GPIO_RAWINTSTAT_A;
- }
-
-
- /*---------------------------------------------------------------------------*/
- /** @brief Clear the specified pin interrupts
-
- Clears the specified pin interrupts. Edge-triggered interrupts must be cleared
- by software.
-
- @param[in] gpios Pin identifiers @ref gpio_pin_id
- If multiple pins are to be changed, use bitwise OR '|' to separate
- them.
- */
- void gpio_int_clear(uint16_t gpios)
- {
- GPIO_INTEOI_A |= gpios;
- }
-
- /**@}*/
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