move components to SDK dir

SDK/12.3.0_d7731ad/components/drivers_nrf/gpiote/nrf_drv_gpiote.c

@@ -0,0 +1,809 @@
+/**
+ * Copyright (c) 2015 - 2017, 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.
+ * 
+ */
+
+#include "sdk_common.h"
+#if NRF_MODULE_ENABLED(GPIOTE)
+#include "nrf_drv_gpiote.h"
+#include "nrf_drv_common.h"
+#include "app_util_platform.h"
+#include "nrf_assert.h"
+#include "nrf_bitmask.h"
+#include <string.h>
+
+#define NRF_LOG_MODULE_NAME "GPIOTE"
+
+#if GPIOTE_CONFIG_LOG_ENABLED
+#define NRF_LOG_LEVEL       GPIOTE_CONFIG_LOG_LEVEL
+#define NRF_LOG_INFO_COLOR  GPIOTE_CONFIG_INFO_COLOR
+#define NRF_LOG_DEBUG_COLOR GPIOTE_CONFIG_DEBUG_COLOR
+#else // GPIOTE_CONFIG_LOG_ENABLED
+#define NRF_LOG_LEVEL       0
+#endif  // GPIOTE_CONFIG_LOG_ENABLED
+#include "nrf_log.h"
+#include "nrf_log_ctrl.h"
+
+/* Validate configuration */
+INTERRUPT_PRIORITY_VALIDATION(GPIOTE_CONFIG_IRQ_PRIORITY);
+
+#define FORBIDDEN_HANDLER_ADDRESS ((nrf_drv_gpiote_evt_handler_t)UINT32_MAX)
+#define PIN_NOT_USED              (-1)
+#define PIN_USED                  (-2)
+#define NO_CHANNELS               (-1)
+#define SENSE_FIELD_POS           (6)
+#define SENSE_FIELD_MASK          (0xC0)
+
+/**
+ * @brief Macro for converting task-event index to an address of an event register.
+ *
+ * Macro utilizes the fact that registers are grouped together in ascending order.
+ */
+#define TE_IDX_TO_EVENT_ADDR(idx)    (nrf_gpiote_events_t)((uint32_t)NRF_GPIOTE_EVENTS_IN_0 + \
+                                                           (sizeof(uint32_t) * (idx)))
+
+/**
+ * @brief Macro for converting task-event index of OUT task to an address of a task register.
+ *
+ * Macro utilizes the fact that registers are grouped together in ascending order.
+ */
+#define TE_OUT_IDX_TO_TASK_ADDR(idx) (nrf_gpiote_tasks_t)((uint32_t)NRF_GPIOTE_TASKS_OUT_0 + \
+                                                          (sizeof(uint32_t) * (idx)))
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__SDK_DOXYGEN__)
+/**
+ * @brief Macro for converting task-event index of SET task to an address of a task register.
+ *
+ * Macro utilizes the fact that registers are grouped together in ascending order.
+ */
+#define TE_SET_IDX_TO_TASK_ADDR(idx) (nrf_gpiote_tasks_t)((uint32_t)NRF_GPIOTE_TASKS_SET_0 + \
+                                                          (sizeof(uint32_t) * (idx)))
+
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT) || defined(__SDK_DOXYGEN__)
+
+#if defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__SDK_DOXYGEN__)
+/**
+ * @brief Macro for converting task-event index of CLR task to an address of a task register.
+ *
+ * Macro utilizes the fact that registers are grouped together in ascending order.
+ */
+#define TE_CLR_IDX_TO_TASK_ADDR(idx) (nrf_gpiote_tasks_t)((uint32_t)NRF_GPIOTE_TASKS_CLR_0 + \
+                                                          (sizeof(uint32_t) * (idx)))
+
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT) || defined(__SDK_DOXYGEN__)
+
+/*lint -save -e661*/
+typedef struct
+{
+    nrf_drv_gpiote_evt_handler_t handlers[GPIOTE_CH_NUM + GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS];
+    int8_t                       pin_assignments[NUMBER_OF_PINS];
+    int8_t                       port_handlers_pins[GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS];
+    nrf_drv_state_t              state;
+} gpiote_control_block_t;
+
+static gpiote_control_block_t m_cb;
+
+__STATIC_INLINE bool pin_in_use(uint32_t pin)
+{
+    return (m_cb.pin_assignments[pin] != PIN_NOT_USED);
+}
+
+
+__STATIC_INLINE bool pin_in_use_as_non_task_out(uint32_t pin)
+{
+    return (m_cb.pin_assignments[pin] == PIN_USED);
+}
+
+
+__STATIC_INLINE bool pin_in_use_by_te(uint32_t pin)
+{
+    return (m_cb.pin_assignments[pin] >= 0 && m_cb.pin_assignments[pin] <
+            GPIOTE_CH_NUM) ? true : false;
+}
+
+
+__STATIC_INLINE bool pin_in_use_by_port(uint32_t pin)
+{
+    return (m_cb.pin_assignments[pin] >= GPIOTE_CH_NUM);
+}
+
+
+__STATIC_INLINE bool pin_in_use_by_gpiote(uint32_t pin)
+{
+    return (m_cb.pin_assignments[pin] >= 0);
+}
+
+
+__STATIC_INLINE void pin_in_use_by_te_set(uint32_t                     pin,
+                                          uint32_t                     channel_id,
+                                          nrf_drv_gpiote_evt_handler_t handler,
+                                          bool                         is_channel)
+{
+    m_cb.pin_assignments[pin] = channel_id;
+    m_cb.handlers[channel_id] = handler;
+    if (!is_channel)
+    {
+        m_cb.port_handlers_pins[channel_id - GPIOTE_CH_NUM] = (int8_t)pin;
+    }
+}
+
+
+__STATIC_INLINE void pin_in_use_set(uint32_t pin)
+{
+    m_cb.pin_assignments[pin] = PIN_USED;
+}
+
+
+__STATIC_INLINE void pin_in_use_clear(uint32_t pin)
+{
+    m_cb.pin_assignments[pin] = PIN_NOT_USED;
+}
+
+
+__STATIC_INLINE int8_t channel_port_get(uint32_t pin)
+{
+    return m_cb.pin_assignments[pin];
+}
+
+
+__STATIC_INLINE nrf_drv_gpiote_evt_handler_t channel_handler_get(uint32_t channel)
+{
+    return m_cb.handlers[channel];
+}
+
+
+static int8_t channel_port_alloc(uint32_t pin, nrf_drv_gpiote_evt_handler_t handler, bool channel)
+{
+    int8_t   channel_id = NO_CHANNELS;
+    uint32_t i;
+
+    uint32_t start_idx = channel ? 0 : GPIOTE_CH_NUM;
+    uint32_t end_idx   =
+        channel ? GPIOTE_CH_NUM : (GPIOTE_CH_NUM + GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS);
+
+    // critical section
+
+    for (i = start_idx; i < end_idx; i++)
+    {
+        if (m_cb.handlers[i] == FORBIDDEN_HANDLER_ADDRESS)
+        {
+            pin_in_use_by_te_set(pin, i, handler, channel);
+            channel_id = i;
+            break;
+        }
+    }
+    // critical section
+    return channel_id;
+}
+
+
+static void channel_free(uint8_t channel_id)
+{
+    m_cb.handlers[channel_id] = FORBIDDEN_HANDLER_ADDRESS;
+    if (channel_id >= GPIOTE_CH_NUM)
+    {
+        m_cb.port_handlers_pins[channel_id - GPIOTE_CH_NUM] = (int8_t)PIN_NOT_USED;
+    }
+}
+
+
+ret_code_t nrf_drv_gpiote_init(void)
+{
+    ret_code_t err_code;
+
+    if (m_cb.state != NRF_DRV_STATE_UNINITIALIZED)
+    {
+        err_code = NRF_ERROR_INVALID_STATE;
+        NRF_LOG_WARNING("Function: %s, error code: %s.\r\n",
+                        (uint32_t)__func__,
+                        (uint32_t)ERR_TO_STR(err_code));
+        return err_code;
+    }
+
+    uint8_t i;
+
+    for (i = 0; i < NUMBER_OF_PINS; i++)
+    {
+        pin_in_use_clear(i);
+    }
+
+    for (i = 0; i < (GPIOTE_CH_NUM + GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS); i++)
+    {
+        channel_free(i);
+    }
+
+    nrf_drv_common_irq_enable(GPIOTE_IRQn, GPIOTE_CONFIG_IRQ_PRIORITY);
+    nrf_gpiote_event_clear(NRF_GPIOTE_EVENTS_PORT);
+    nrf_gpiote_int_enable(GPIOTE_INTENSET_PORT_Msk);
+    m_cb.state = NRF_DRV_STATE_INITIALIZED;
+
+    err_code = NRF_SUCCESS;
+    NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__,
+                 (uint32_t)ERR_TO_STR(err_code));
+    return err_code;
+}
+
+
+bool nrf_drv_gpiote_is_init(void)
+{
+    return (m_cb.state != NRF_DRV_STATE_UNINITIALIZED) ? true : false;
+}
+
+
+void nrf_drv_gpiote_uninit(void)
+{
+    ASSERT(m_cb.state != NRF_DRV_STATE_UNINITIALIZED);
+
+    uint32_t i;
+
+    for (i = 0; i < NUMBER_OF_PINS; i++)
+    {
+        if (pin_in_use_as_non_task_out(i))
+        {
+            nrf_drv_gpiote_out_uninit(i);
+        }
+        else if ( pin_in_use_by_gpiote(i))
+        {
+            /* Disable gpiote_in is having the same effect on out pin as gpiote_out_uninit on
+             * so it can be called on all pins used by GPIOTE.
+             */
+            nrf_drv_gpiote_in_uninit(i);
+        }
+    }
+    m_cb.state = NRF_DRV_STATE_UNINITIALIZED;
+    NRF_LOG_INFO("Uninitialized.\r\n");
+}
+
+
+ret_code_t nrf_drv_gpiote_out_init(nrf_drv_gpiote_pin_t                pin,
+                                   nrf_drv_gpiote_out_config_t const * p_config)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(m_cb.state == NRF_DRV_STATE_INITIALIZED);
+    ASSERT(p_config);
+
+    ret_code_t err_code = NRF_SUCCESS;
+
+    if (pin_in_use(pin))
+    {
+        err_code = NRF_ERROR_INVALID_STATE;
+    }
+    else
+    {
+        if (p_config->task_pin)
+        {
+            int8_t channel = channel_port_alloc(pin, NULL, true);
+
+            if (channel != NO_CHANNELS)
+            {
+                nrf_gpiote_task_configure(channel, pin, p_config->action, p_config->init_state);
+            }
+            else
+            {
+                err_code = NRF_ERROR_NO_MEM;
+            }
+        }
+        else
+        {
+            pin_in_use_set(pin);
+        }
+
+        if (err_code == NRF_SUCCESS)
+        {
+            if (p_config->init_state == NRF_GPIOTE_INITIAL_VALUE_HIGH)
+            {
+                nrf_gpio_pin_set(pin);
+            }
+            else
+            {
+                nrf_gpio_pin_clear(pin);
+            }
+
+            nrf_gpio_cfg_output(pin);
+        }
+    }
+
+    NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__,
+                 (uint32_t)ERR_TO_STR(err_code));
+    return err_code;
+}
+
+
+void nrf_drv_gpiote_out_uninit(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+
+    if (pin_in_use_by_te(pin))
+    {
+        channel_free((uint8_t)channel_port_get(pin));
+        nrf_gpiote_te_default(channel_port_get(pin));
+    }
+    pin_in_use_clear(pin);
+
+    nrf_gpio_cfg_default(pin);
+}
+
+
+void nrf_drv_gpiote_out_set(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(!pin_in_use_by_te(pin))
+
+    nrf_gpio_pin_set(pin);
+}
+
+
+void nrf_drv_gpiote_out_clear(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(!pin_in_use_by_te(pin))
+
+    nrf_gpio_pin_clear(pin);
+}
+
+
+void nrf_drv_gpiote_out_toggle(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(!pin_in_use_by_te(pin))
+
+    nrf_gpio_pin_toggle(pin);
+}
+
+
+void nrf_drv_gpiote_out_task_enable(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin))
+
+    nrf_gpiote_task_enable(m_cb.pin_assignments[pin]);
+}
+
+
+void nrf_drv_gpiote_out_task_disable(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin))
+
+    nrf_gpiote_task_disable(m_cb.pin_assignments[pin]);
+}
+
+
+uint32_t nrf_drv_gpiote_out_task_addr_get(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_OUT_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    return nrf_gpiote_task_addr_get(task);
+}
+
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT)
+uint32_t nrf_drv_gpiote_set_task_addr_get(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_SET_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    return nrf_gpiote_task_addr_get(task);
+}
+
+
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT)
+
+#if defined(GPIOTE_FEATURE_CLR_PRESENT)
+uint32_t nrf_drv_gpiote_clr_task_addr_get(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_CLR_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    return nrf_gpiote_task_addr_get(task);
+}
+
+
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT)
+
+void nrf_drv_gpiote_out_task_force(nrf_drv_gpiote_pin_t pin, uint8_t state)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_outinit_t init_val =
+        state ? NRF_GPIOTE_INITIAL_VALUE_HIGH : NRF_GPIOTE_INITIAL_VALUE_LOW;
+    nrf_gpiote_task_force(m_cb.pin_assignments[pin], init_val);
+}
+
+
+void nrf_drv_gpiote_out_task_trigger(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_OUT_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    nrf_gpiote_task_set(task);
+}
+
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT)
+void nrf_drv_gpiote_set_task_trigger(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_SET_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    nrf_gpiote_task_set(task);
+}
+
+
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT)
+
+#if  defined(GPIOTE_FEATURE_CLR_PRESENT)
+void nrf_drv_gpiote_clr_task_trigger(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use(pin));
+    ASSERT(pin_in_use_by_te(pin));
+
+    nrf_gpiote_tasks_t task = TE_CLR_IDX_TO_TASK_ADDR(channel_port_get(pin));
+    nrf_gpiote_task_set(task);
+}
+
+
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT)
+
+ret_code_t nrf_drv_gpiote_in_init(nrf_drv_gpiote_pin_t               pin,
+                                  nrf_drv_gpiote_in_config_t const * p_config,
+                                  nrf_drv_gpiote_evt_handler_t       evt_handler)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ret_code_t err_code = NRF_SUCCESS;
+
+    /* Only one GPIOTE channel can be assigned to one physical pin. */
+    if (pin_in_use_by_gpiote(pin))
+    {
+        err_code = NRF_ERROR_INVALID_STATE;
+    }
+    else
+    {
+        int8_t channel = channel_port_alloc(pin, evt_handler, p_config->hi_accuracy);
+        if (channel != NO_CHANNELS)
+        {
+            if (p_config->is_watcher)
+            {
+                nrf_gpio_cfg_watcher(pin);
+            }
+            else
+            {
+                nrf_gpio_cfg_input(pin, p_config->pull);
+            }
+
+            if (p_config->hi_accuracy)
+            {
+                nrf_gpiote_event_configure(channel, pin, p_config->sense);
+            }
+            else
+            {
+                m_cb.port_handlers_pins[channel -
+                                        GPIOTE_CH_NUM] |= (p_config->sense) << SENSE_FIELD_POS;
+            }
+        }
+        else
+        {
+            err_code = NRF_ERROR_NO_MEM;
+        }
+    }
+
+    NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__,
+                 (uint32_t)ERR_TO_STR(err_code));
+    return err_code;
+}
+
+
+void nrf_drv_gpiote_in_event_enable(nrf_drv_gpiote_pin_t pin, bool int_enable)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_gpiote(pin));
+    if (pin_in_use_by_port(pin))
+    {
+        uint8_t pin_and_sense =
+            m_cb.port_handlers_pins[channel_port_get(pin) - GPIOTE_CH_NUM];
+        nrf_gpiote_polarity_t polarity =
+            (nrf_gpiote_polarity_t)(pin_and_sense >> SENSE_FIELD_POS);
+        nrf_gpio_pin_sense_t sense;
+        if (polarity == NRF_GPIOTE_POLARITY_TOGGLE)
+        {
+            /* read current pin state and set for next sense to oposit */
+            sense = (nrf_gpio_pin_read(pin)) ?
+                    NRF_GPIO_PIN_SENSE_LOW : NRF_GPIO_PIN_SENSE_HIGH;
+        }
+        else
+        {
+            sense = (polarity == NRF_GPIOTE_POLARITY_LOTOHI) ?
+                    NRF_GPIO_PIN_SENSE_HIGH : NRF_GPIO_PIN_SENSE_LOW;
+        }
+        nrf_gpio_cfg_sense_set(pin, sense);
+    }
+    else if (pin_in_use_by_te(pin))
+    {
+        int32_t             channel = (int32_t)channel_port_get(pin);
+        nrf_gpiote_events_t event   = TE_IDX_TO_EVENT_ADDR(channel);
+
+        nrf_gpiote_event_enable(channel);
+
+        nrf_gpiote_event_clear(event);
+        if (int_enable)
+        {
+            nrf_drv_gpiote_evt_handler_t handler = channel_handler_get(channel_port_get(pin));
+            // Enable the interrupt only if event handler was provided.
+            if (handler)
+            {
+                nrf_gpiote_int_enable(1 << channel);
+            }
+        }
+    }
+}
+
+
+void nrf_drv_gpiote_in_event_disable(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_gpiote(pin));
+    if (pin_in_use_by_port(pin))
+    {
+        nrf_gpio_cfg_sense_set(pin, NRF_GPIO_PIN_NOSENSE);
+    }
+    else if (pin_in_use_by_te(pin))
+    {
+        int32_t channel = (int32_t)channel_port_get(pin);
+        nrf_gpiote_event_disable(channel);
+        nrf_gpiote_int_disable(1 << channel);
+    }
+}
+
+
+void nrf_drv_gpiote_in_uninit(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_gpiote(pin));
+    nrf_drv_gpiote_in_event_disable(pin);
+    if (pin_in_use_by_te(pin))
+    {
+        nrf_gpiote_te_default(channel_port_get(pin));
+    }
+    nrf_gpio_cfg_default(pin);
+    channel_free((uint8_t)channel_port_get(pin));
+    pin_in_use_clear(pin);
+}
+
+
+bool nrf_drv_gpiote_in_is_set(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    return nrf_gpio_pin_read(pin) ? true : false;
+}
+
+
+uint32_t nrf_drv_gpiote_in_event_addr_get(nrf_drv_gpiote_pin_t pin)
+{
+    ASSERT(pin < NUMBER_OF_PINS);
+    ASSERT(pin_in_use_by_port(pin) || pin_in_use_by_te(pin));
+
+    nrf_gpiote_events_t event = NRF_GPIOTE_EVENTS_PORT;
+
+    if (pin_in_use_by_te(pin))
+    {
+        event = TE_IDX_TO_EVENT_ADDR(channel_port_get(pin));
+    }
+    return nrf_gpiote_event_addr_get(event);
+}
+
+
+void GPIOTE_IRQHandler(void)
+{
+    uint32_t status            = 0;
+    uint32_t input[GPIO_COUNT] = {0};
+
+    /* collect status of all GPIOTE pin events. Processing is done once all are collected and cleared.*/
+    uint32_t            i;
+    nrf_gpiote_events_t event = NRF_GPIOTE_EVENTS_IN_0;
+    uint32_t            mask  = (uint32_t)NRF_GPIOTE_INT_IN0_MASK;
+
+    for (i = 0; i < GPIOTE_CH_NUM; i++)
+    {
+        if (nrf_gpiote_event_is_set(event) && nrf_gpiote_int_is_enabled(mask))
+        {
+            nrf_gpiote_event_clear(event);
+            status |= mask;
+        }
+        mask <<= 1;
+        /* Incrementing to next event, utilizing the fact that events are grouped together
+         * in ascending order. */
+        event = (nrf_gpiote_events_t)((uint32_t)event + sizeof(uint32_t));
+    }
+
+    /* collect PORT status event, if event is set read pins state. Processing is postponed to the
+     * end of interrupt. */
+    if (nrf_gpiote_event_is_set(NRF_GPIOTE_EVENTS_PORT))
+    {
+        nrf_gpiote_event_clear(NRF_GPIOTE_EVENTS_PORT);
+        status |= (uint32_t)NRF_GPIOTE_INT_PORT_MASK;
+        nrf_gpio_ports_read(0, GPIO_COUNT, input);
+    }
+
+    /* Process pin events. */
+    if (status & NRF_GPIOTE_INT_IN_MASK)
+    {
+        mask = (uint32_t)NRF_GPIOTE_INT_IN0_MASK;
+
+        for (i = 0; i < GPIOTE_CH_NUM; i++)
+        {
+            if (mask & status)
+            {
+                nrf_drv_gpiote_pin_t pin = nrf_gpiote_event_pin_get(i);
+                NRF_LOG_DEBUG("Event in number: %d.\r\n", i);
+                nrf_gpiote_polarity_t        polarity = nrf_gpiote_event_polarity_get(i);
+                nrf_drv_gpiote_evt_handler_t handler  = channel_handler_get(i);
+                NRF_LOG_DEBUG("Pin: %d, polarity: %d.\r\n", pin, polarity);
+                if (handler)
+                {
+                    handler(pin, polarity);
+                }
+            }
+            mask <<= 1;
+        }
+    }
+
+    if (status & (uint32_t)NRF_GPIOTE_INT_PORT_MASK)
+    {
+        /* Process port event. */
+        uint32_t port_idx;
+        uint8_t  repeat                  = 0;
+        uint32_t toggle_mask[GPIO_COUNT] = {0};
+        uint32_t pins_to_check[GPIO_COUNT];
+
+        // Faster way of doing memset because in interrupt context.
+        for (port_idx = 0; port_idx < GPIO_COUNT; port_idx++)
+        {
+            pins_to_check[port_idx] = 0xFFFFFFFF;
+        }
+
+        do
+        {
+            repeat = 0;
+
+            for (i = 0; i < GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS; i++)
+            {
+                uint8_t              pin_and_sense = m_cb.port_handlers_pins[i];
+                nrf_drv_gpiote_pin_t pin           = (pin_and_sense & ~SENSE_FIELD_MASK);
+
+                if ((m_cb.port_handlers_pins[i] != PIN_NOT_USED)
+                    && nrf_bitmask_bit_is_set(pin, pins_to_check))
+                {
+                    nrf_gpiote_polarity_t polarity =
+                        (nrf_gpiote_polarity_t)((pin_and_sense &
+                                                 SENSE_FIELD_MASK) >> SENSE_FIELD_POS);
+                    nrf_drv_gpiote_evt_handler_t handler =
+                        channel_handler_get(channel_port_get(pin));
+                    if (handler || (polarity == NRF_GPIOTE_POLARITY_TOGGLE))
+                    {
+                        if (polarity == NRF_GPIOTE_POLARITY_TOGGLE)
+                        {
+                            nrf_bitmask_bit_set(pin, toggle_mask);
+                        }
+                        nrf_gpio_pin_sense_t sense     = nrf_gpio_pin_sense_get(pin);
+                        uint32_t             pin_state = nrf_bitmask_bit_is_set(pin, input);
+                        if ((pin_state && (sense == NRF_GPIO_PIN_SENSE_HIGH)) ||
+                            (!pin_state && (sense == NRF_GPIO_PIN_SENSE_LOW))  )
+                        {
+                            NRF_LOG_DEBUG("PORT event for pin: %d, polarity: %d.\r\n", pin,
+                                          polarity);
+                            if (polarity == NRF_GPIOTE_POLARITY_TOGGLE)
+                            {
+                                nrf_gpio_pin_sense_t next_sense =
+                                    (sense == NRF_GPIO_PIN_SENSE_HIGH) ?
+                                    NRF_GPIO_PIN_SENSE_LOW :
+                                    NRF_GPIO_PIN_SENSE_HIGH;
+                                nrf_gpio_cfg_sense_set(pin, next_sense);
+                                ++repeat;
+
+                            }
+                            if (handler)
+                            {
+                                handler(pin, polarity);
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (repeat)
+            {
+                // When one of the pins in low-accuracy and toggle mode becomes active,
+                // it's sense mode is inverted to clear the internal SENSE signal.
+                // State of any other enabled low-accuracy input in toggle mode must be checked
+                // explicitly, because it does not trigger the interrput when SENSE signal is active.
+                // For more information about SENSE functionality, refer to Product Specification.
+
+                uint32_t new_input[GPIO_COUNT];
+                bool     input_unchanged = true;
+                nrf_gpio_ports_read(0, GPIO_COUNT, new_input);
+
+                // Faster way of doing memcmp because in interrupt context.
+                for (port_idx = 0; port_idx < GPIO_COUNT; port_idx++)
+                {
+                    if (new_input[port_idx] != input[port_idx])
+                    {
+                        input_unchanged = false;
+                        break;
+                    }
+                }
+
+                if (input_unchanged)
+                {
+                    // No change.
+                    repeat = 0;
+                }
+                else
+                {
+                    // Faster way of doing memcpy because in interrupt context.
+                    for (port_idx = 0; port_idx < GPIO_COUNT; port_idx++)
+                    {
+                        input[port_idx]         = new_input[port_idx];
+                        pins_to_check[port_idx] = toggle_mask[port_idx];
+                    }
+                }
+            }
+        }
+        while (repeat);
+    }
+}
+
+
+/*lint -restore*/
+#endif // NRF_MODULE_ENABLED(GPIOTE)

SDK/12.3.0_d7731ad/components/drivers_nrf/gpiote/nrf_drv_gpiote.h

@@ -0,0 +1,386 @@
+/**
+ * Copyright (c) 2015 - 2017, 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 NRF_DRV_GPIOTE__
+#define NRF_DRV_GPIOTE__
+
+/**
+ * @addtogroup nrf_gpiote GPIOTE abstraction and driver
+ * @ingroup nrf_drivers
+ * @brief GPIOTE APIs.
+ * @defgroup nrf_drv_gpiote GPIOTE driver
+ * @{
+ * @ingroup nrf_gpiote
+ * @brief GPIOTE driver for managing input and output pins.
+ */
+
+#include "nrf_gpiote.h"
+#include "nrf_gpio.h"
+#include "sdk_errors.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include "sdk_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**@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; /**< True when the input pin is tracking an output pin. */
+    bool                  hi_accuracy;/**< True when high accuracy (IN_EVENT) is used. */
+} nrf_drv_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 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 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 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 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. */
+} nrf_drv_gpiote_out_config_t;
+
+/**@brief Macro for configuring a pin to use as output. GPIOTE is not used for the pin. */
+#define 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 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 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 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 nrf_drv_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 (*nrf_drv_gpiote_evt_handler_t)(nrf_drv_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    NRF_SUCCESS If initialization was successful.
+ * @retval    NRF_ERROR_INVALID_STATE If the driver was already initialized.
+ */
+ret_code_t nrf_drv_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 nrf_drv_gpiote_is_init(void);
+
+/**
+ * @brief Function for uninitializing the GPIOTE module.
+ */
+void nrf_drv_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 NRF_SUCCESS             If initialization was successful.
+ * @retval NRF_ERROR_INVALID_STATE If the driver is not initialized or the pin is already used.
+ * @retval NRF_ERROR_NO_MEM        If no GPIOTE channel is available.
+ */
+ret_code_t nrf_drv_gpiote_out_init(nrf_drv_gpiote_pin_t pin,
+                                   nrf_drv_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 nrf_drv_gpiote_out_uninit(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for setting a GPIOTE output pin.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_set(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for clearing a GPIOTE output pin.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_clear(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for toggling a GPIOTE output pin.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_toggle(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for enabling a GPIOTE output pin task.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_task_enable(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for disabling a GPIOTE output pin task.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_task_disable(nrf_drv_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 nrf_drv_gpiote_out_task_addr_get(nrf_drv_gpiote_pin_t pin);
+
+#if defined(GPIOTE_FEATURE_SET_PRESENT)
+/**
+ * @brief Function for getting the address of a configurable GPIOTE task.
+ *
+ * @param[in] pin       Pin.
+ *
+ * @return Address of SET task.
+ */
+uint32_t nrf_drv_gpiote_set_task_addr_get(nrf_drv_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_SET_PRESENT)
+
+#if defined(GPIOTE_FEATURE_CLR_PRESENT)
+/**
+ * @brief Function for getting the address of a configurable GPIOTE task.
+ *
+ * @param[in] pin       Pin.
+ *
+ * @return Address of CLR task.
+ */
+uint32_t nrf_drv_gpiote_clr_task_addr_get(nrf_drv_gpiote_pin_t pin);
+#endif // defined(GPIOTE_FEATURE_CLR_PRESENT)
+
+/**
+ * @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 NRF_SUCCESS             If initialization was successful.
+ * @retval NRF_ERROR_INVALID_STATE If the driver is not initialized or the pin is already used.
+ * @retval NRF_ERROR_NO_MEM        If no GPIOTE channel is available.
+ */
+ret_code_t nrf_drv_gpiote_in_init(nrf_drv_gpiote_pin_t pin,
+                                  nrf_drv_gpiote_in_config_t const * p_config,
+                                  nrf_drv_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 nrf_drv_gpiote_in_uninit(nrf_drv_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 nrf_drv_gpiote_in_event_enable(nrf_drv_gpiote_pin_t pin, bool int_enable);
+
+/**
+ * @brief Function for disabling a GPIOTE input pin.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_in_event_disable(nrf_drv_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 nrf_drv_gpiote_in_is_set(nrf_drv_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 nrf_drv_gpiote_in_event_addr_get(nrf_drv_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 nrf_drv_gpiote_out_task_force(nrf_drv_gpiote_pin_t pin, uint8_t state);
+
+/**
+ * @brief Function for triggering the task OUT manually.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_out_task_trigger(nrf_drv_gpiote_pin_t pin);
+
+#ifdef NRF52_SERIES
+/**
+ * @brief Function for triggering the task SET manually.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_set_task_trigger(nrf_drv_gpiote_pin_t pin);
+
+/**
+ * @brief Function for triggering the task CLR manually.
+ *
+ * @param[in] pin       Pin.
+ */
+void nrf_drv_gpiote_clr_task_trigger(nrf_drv_gpiote_pin_t pin);
+#endif
+
+/**
+ *@}
+ **/
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //NRF_DRV_GPIOTE__