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authorTrygve Laugstøl <trygvis@inamo.no>2018-08-23 17:08:59 +0200
committerTrygve Laugstøl <trygvis@inamo.no>2018-08-23 17:12:21 +0200
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+/**
+ * Copyright (c) 2015 - 2018, Nordic Semiconductor ASA
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ * Semiconductor ASA integrated circuit in a product or a software update for
+ * such product, must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution.
+ *
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * 4. This software, with or without modification, must only be used with a
+ * Nordic Semiconductor ASA integrated circuit.
+ *
+ * 5. Any software provided in binary form under this license must not be reverse
+ * engineered, decompiled, modified and/or disassembled.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef NRFX_GPIOTE_H__
+#define NRFX_GPIOTE_H__
+
+#include <nrfx.h>
+#include <hal/nrf_gpiote.h>
+#include <hal/nrf_gpio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup nrfx_gpiote GPIOTE driver
+ * @{
+ * @ingroup nrf_gpiote
+ * @brief GPIOTE peripheral driver.
+ */
+
+/**@brief Input pin configuration. */
+typedef struct
+{
+ nrf_gpiote_polarity_t sense; /**< Transition that triggers interrupt. */
+ nrf_gpio_pin_pull_t pull; /**< Pulling mode. */
+ bool is_watcher : 1; /**< True when the input pin is tracking an output pin. */
+ bool hi_accuracy : 1; /**< True when high accuracy (IN_EVENT) is used. */
+ bool skip_gpio_setup : 1; /**< Do not change GPIO configuration */
+} nrfx_gpiote_in_config_t;
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect low-to-high transition.
+ * @details Set hi_accu to true to use IN_EVENT. */
+#define NRFX_GPIOTE_CONFIG_IN_SENSE_LOTOHI(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_LOTOHI, \
+ }
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect high-to-low transition.
+ * @details Set hi_accu to true to use IN_EVENT. */
+#define NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_HITOLO, \
+ }
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect any change on the pin.
+ * @details Set hi_accu to true to use IN_EVENT.*/
+#define NRFX_GPIOTE_CONFIG_IN_SENSE_TOGGLE(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_TOGGLE, \
+ }
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect low-to-high transition.
+ * @details Set hi_accu to true to use IN_EVENT.
+ * @note This macro prepares configuration that skips GPIO setup. */
+#define NRFX_GPIOTE_RAW_CONFIG_IN_SENSE_LOTOHI(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_LOTOHI, \
+ .skip_gpio_setup = true, \
+ }
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect high-to-low transition.
+ * @details Set hi_accu to true to use IN_EVENT.
+ * @note This macro prepares configuration that skips GPIO setup. */
+#define NRFX_GPIOTE_RAW_CONFIG_IN_SENSE_HITOLO(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_HITOLO, \
+ .skip_gpio_setup = true, \
+ }
+
+/**@brief Macro for configuring a pin to use a GPIO IN or PORT EVENT to detect any change on the pin.
+ * @details Set hi_accu to true to use IN_EVENT.
+ * @note This macro prepares configuration that skips GPIO setup. */
+#define NRFX_GPIOTE_RAW_CONFIG_IN_SENSE_TOGGLE(hi_accu) \
+ { \
+ .is_watcher = false, \
+ .hi_accuracy = hi_accu, \
+ .pull = NRF_GPIO_PIN_NOPULL, \
+ .sense = NRF_GPIOTE_POLARITY_TOGGLE, \
+ .skip_gpio_setup = true, \
+ }
+
+
+/**@brief Output pin configuration. */
+typedef struct
+{
+ nrf_gpiote_polarity_t action; /**< Configuration of the pin task. */
+ nrf_gpiote_outinit_t init_state; /**< Initial state of the output pin. */
+ bool task_pin; /**< True if the pin is controlled by a GPIOTE task. */
+} nrfx_gpiote_out_config_t;
+
+/**@brief Macro for configuring a pin to use as output. GPIOTE is not used for the pin. */
+#define NRFX_GPIOTE_CONFIG_OUT_SIMPLE(init_high) \
+ { \
+ .init_state = init_high ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW, \
+ .task_pin = false, \
+ }
+
+/**@brief Macro for configuring a pin to use the GPIO OUT TASK to change the state from high to low.
+ * @details The task will clear the pin. Therefore, the pin is set initially. */
+#define NRFX_GPIOTE_CONFIG_OUT_TASK_LOW \
+ { \
+ .init_state = NRF_GPIOTE_INITIAL_VALUE_HIGH, \
+ .task_pin = true, \
+ .action = NRF_GPIOTE_POLARITY_HITOLO, \
+ }
+
+/**@brief Macro for configuring a pin to use the GPIO OUT TASK to change the state from low to high.
+ * @details The task will set the pin. Therefore, the pin is cleared initially. */
+#define NRFX_GPIOTE_CONFIG_OUT_TASK_HIGH \
+ { \
+ .init_state = NRF_GPIOTE_INITIAL_VALUE_LOW, \
+ .task_pin = true, \
+ .action = NRF_GPIOTE_POLARITY_LOTOHI, \
+ }
+
+/**@brief Macro for configuring a pin to use the GPIO OUT TASK to toggle the pin state.
+ * @details The initial pin state must be provided. */
+#define NRFX_GPIOTE_CONFIG_OUT_TASK_TOGGLE(init_high) \
+ { \
+ .init_state = init_high ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW, \
+ .task_pin = true, \
+ .action = NRF_GPIOTE_POLARITY_TOGGLE, \
+ }
+
+/** @brief Pin. */
+typedef uint32_t nrfx_gpiote_pin_t;
+
+/**
+ * @brief Pin event handler prototype.
+ *
+ * @param pin Pin that triggered this event.
+ * @param action Action that lead to triggering this event.
+ */
+typedef void (*nrfx_gpiote_evt_handler_t)(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action);
+
+/**
+ * @brief Function for initializing the GPIOTE module.
+ *
+ * @details Only static configuration is supported to prevent the shared
+ * resource being customized by the initiator.
+ *
+ * @retval NRFX_SUCCESS If initialization was successful.
+ * @retval NRFX_ERROR_INVALID_STATE If the driver was already initialized.
+ */
+nrfx_err_t nrfx_gpiote_init(void);
+
+/**
+ * @brief Function for checking if the GPIOTE module is initialized.
+ *
+ * @details The GPIOTE module is a shared module. Therefore, you should check if
+ * the module is already initialized and skip initialization if it is.
+ *
+ * @retval true If the module is already initialized.
+ * @retval false If the module is not initialized.
+ */
+bool nrfx_gpiote_is_init(void);
+
+/**
+ * @brief Function for uninitializing the GPIOTE module.
+ */
+void nrfx_gpiote_uninit(void);
+
+/**
+ * @brief Function for initializing a GPIOTE output pin.
+ * @details The output pin can be controlled by the CPU or by PPI. The initial
+ * configuration specifies which mode is used. If PPI mode is used, the driver
+ * attempts to allocate one of the available GPIOTE channels. If no channel is
+ * available, an error is returned.
+ *
+ * @param[in] pin Pin.
+ * @param[in] p_config Initial configuration.
+ *
+ * @retval NRFX_SUCCESS If initialization was successful.
+ * @retval NRFX_ERROR_INVALID_STATE If the driver is not initialized or the pin is already used.
+ * @retval NRFX_ERROR_NO_MEM If no GPIOTE channel is available.
+ */
+nrfx_err_t nrfx_gpiote_out_init(nrfx_gpiote_pin_t pin,
+ nrfx_gpiote_out_config_t const * p_config);
+
+/**
+ * @brief Function for uninitializing a GPIOTE output pin.
+ * @details The driver frees the GPIOTE channel if the output pin was using one.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_uninit(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for setting a GPIOTE output pin.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_set(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for clearing a GPIOTE output pin.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_clear(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for toggling a GPIOTE output pin.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_toggle(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for enabling a GPIOTE output pin task.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_task_enable(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for disabling a GPIOTE output pin task.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_task_disable(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for getting the address of a configurable GPIOTE task.
+ *
+ * @param[in] pin Pin.
+ *
+ * @return Address of OUT task.
+ */
+uint32_t nrfx_gpiote_out_task_addr_get(nrfx_gpiote_pin_t pin);
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__NRFX_DOXYGEN__)
+/**
+ * @brief Function for getting the address of a configurable GPIOTE task.
+ *
+ * @param[in] pin Pin.
+ *
+ * @return Address of SET task.
+ */
+uint32_t nrfx_gpiote_set_task_addr_get(nrfx_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__NRFX_DOXYGEN__)
+
+#if defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__NRFX_DOXYGEN__)
+/**
+ * @brief Function for getting the address of a configurable GPIOTE task.
+ *
+ * @param[in] pin Pin.
+ *
+ * @return Address of CLR task.
+ */
+uint32_t nrfx_gpiote_clr_task_addr_get(nrfx_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__NRFX_DOXYGEN__)
+
+/**
+ * @brief Function for initializing a GPIOTE input pin.
+ * @details The input pin can act in two ways:
+ * - lower accuracy but low power (high frequency clock not needed)
+ * - higher accuracy (high frequency clock required)
+ *
+ * The initial configuration specifies which mode is used.
+ * If high-accuracy mode is used, the driver attempts to allocate one
+ * of the available GPIOTE channels. If no channel is
+ * available, an error is returned.
+ * In low accuracy mode SENSE feature is used. In this case only one active pin
+ * can be detected at a time. It can be worked around by setting all of the used
+ * low accuracy pins to toggle mode.
+ * For more information about SENSE functionality, refer to Product Specification.
+ *
+ * @param[in] pin Pin.
+ * @param[in] p_config Initial configuration.
+ * @param[in] evt_handler User function to be called when the configured transition occurs.
+ *
+ * @retval NRFX_SUCCESS If initialization was successful.
+ * @retval NRFX_ERROR_INVALID_STATE If the driver is not initialized or the pin is already used.
+ * @retval NRFX_ERROR_NO_MEM If no GPIOTE channel is available.
+ */
+nrfx_err_t nrfx_gpiote_in_init(nrfx_gpiote_pin_t pin,
+ nrfx_gpiote_in_config_t const * p_config,
+ nrfx_gpiote_evt_handler_t evt_handler);
+
+/**
+ * @brief Function for uninitializing a GPIOTE input pin.
+ * @details The driver frees the GPIOTE channel if the input pin was using one.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_in_uninit(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for enabling sensing of a GPIOTE input pin.
+ *
+ * @details If the input pin is configured as high-accuracy pin, the function
+ * enables an IN_EVENT. Otherwise, the function enables the GPIO sense mechanism.
+ * Note that a PORT event is shared between multiple pins, therefore the
+ * interrupt is always enabled.
+ *
+ * @param[in] pin Pin.
+ * @param[in] int_enable True to enable the interrupt. Always valid for a high-accuracy pin.
+ */
+void nrfx_gpiote_in_event_enable(nrfx_gpiote_pin_t pin, bool int_enable);
+
+/**
+ * @brief Function for disabling a GPIOTE input pin.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_in_event_disable(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for checking if a GPIOTE input pin is set.
+ *
+ * @param[in] pin Pin.
+ *
+ * @retval true If the input pin is set.
+ * @retval false If the input pin is not set.
+ */
+bool nrfx_gpiote_in_is_set(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for getting the address of a GPIOTE input pin event.
+ * @details If the pin is configured to use low-accuracy mode, the address of the PORT event is returned.
+ *
+ * @param[in] pin Pin.
+ */
+uint32_t nrfx_gpiote_in_event_addr_get(nrfx_gpiote_pin_t pin);
+
+/**
+ * @brief Function for forcing a specific state on the pin configured as task.
+ *
+ * @param[in] pin Pin.
+ * @param[in] state Pin state.
+ */
+void nrfx_gpiote_out_task_force(nrfx_gpiote_pin_t pin, uint8_t state);
+
+/**
+ * @brief Function for triggering the task OUT manually.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_out_task_trigger(nrfx_gpiote_pin_t pin);
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__NRFX_DOXYGEN__)
+/**
+ * @brief Function for triggering the task SET manually.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_set_task_trigger(nrfx_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__NRFX_DOXYGEN__)
+
+#if defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__NRFX_DOXYGEN__)
+/**
+ * @brief Function for triggering the task CLR manually.
+ *
+ * @param[in] pin Pin.
+ */
+void nrfx_gpiote_clr_task_trigger(nrfx_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__NRFX_DOXYGEN__)
+
+
+void nrfx_gpiote_irq_handler(void);
+
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NRFX_GPIOTE_H__