add files from nrf52832 bootloader project

nRF5_SDK_11.0.0_89a8197/components/drivers_nrf/wdt/nrf_drv_wdt.c

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+/* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+#include "nrf_drv_wdt.h"
+#include "nrf_drv_common.h"
+#include "nrf_error.h"
+#include "nrf_assert.h"
+#include "nrf_wdt.h"
+#include "app_util_platform.h"
+#include <stdbool.h>
+#include <stdint.h>
+
+/**@brief WDT event handler. */
+static nrf_wdt_event_handler_t m_wdt_event_handler;
+
+/**@brief WDT state. */
+static nrf_drv_state_t m_state;
+
+/**@brief WDT alloc table. */
+static uint32_t m_alloc_index;
+
+static const nrf_drv_wdt_config_t m_default_config = NRF_DRV_WDT_DEAFULT_CONFIG;
+
+/**@brief WDT interrupt handler. */
+void WDT_IRQHandler(void)
+{
+    if (nrf_wdt_int_enable_check(NRF_WDT_INT_TIMEOUT_MASK) == true)
+    {
+        nrf_wdt_event_clear(NRF_WDT_EVENT_TIMEOUT);
+        m_wdt_event_handler();
+    }
+}
+
+
+ret_code_t nrf_drv_wdt_init(nrf_drv_wdt_config_t const * p_config,
+                            nrf_wdt_event_handler_t     wdt_event_handler)
+{
+    ASSERT(wdt_event_handler != NULL);
+    m_wdt_event_handler = wdt_event_handler;
+
+    if (m_state == NRF_DRV_STATE_UNINITIALIZED)
+    {
+        m_state = NRF_DRV_STATE_INITIALIZED;
+    }
+    else
+    {
+        return NRF_ERROR_INVALID_STATE; // WDT already initialized
+    }
+
+    if (p_config == NULL)
+    {
+        p_config = &m_default_config;
+    }
+
+    nrf_wdt_behaviour_set(p_config->behaviour);
+    nrf_wdt_reload_value_set((p_config->reload_value * 32768) / 1000);
+
+    nrf_drv_common_irq_enable(WDT_IRQn, p_config->interrupt_priority);
+
+    return NRF_SUCCESS;
+}
+
+
+void nrf_drv_wdt_enable(void)
+{
+    ASSERT(m_alloc_index != 0);
+    ASSERT(m_state == NRF_DRV_STATE_INITIALIZED);
+    nrf_wdt_int_enable(NRF_WDT_INT_TIMEOUT_MASK);
+    nrf_wdt_task_trigger(NRF_WDT_TASK_START);
+    m_state = NRF_DRV_STATE_POWERED_ON;
+}
+
+
+void nrf_drv_wdt_feed(void)
+{
+    ASSERT(m_state == NRF_DRV_STATE_POWERED_ON);
+    for(uint32_t i = 0; i < m_alloc_index; i++)
+    {
+        nrf_wdt_reload_request_set((nrf_wdt_rr_register_t)(NRF_WDT_RR0 + i));
+    }
+}
+
+ret_code_t nrf_drv_wdt_channel_alloc(nrf_drv_wdt_channel_id * p_channel_id)
+{
+    ret_code_t result;
+    ASSERT(p_channel_id);
+    ASSERT(m_state == NRF_DRV_STATE_INITIALIZED);
+
+    CRITICAL_REGION_ENTER();
+    if (m_alloc_index < NRF_WDT_CHANNEL_NUMBER)
+    {
+        *p_channel_id = (nrf_drv_wdt_channel_id)(NRF_WDT_RR0 + m_alloc_index);
+        m_alloc_index++;
+        nrf_wdt_reload_request_enable(*p_channel_id);
+        result = NRF_SUCCESS;
+    }
+    else
+    {
+        result = NRF_ERROR_NO_MEM;
+    }
+    CRITICAL_REGION_EXIT();
+    return result;
+}
+
+void nrf_drv_wdt_channel_feed(nrf_drv_wdt_channel_id channel_id)
+{
+    ASSERT(m_state == NRF_DRV_STATE_POWERED_ON);
+    nrf_wdt_reload_request_set(channel_id);
+}

nRF5_SDK_11.0.0_89a8197/components/drivers_nrf/wdt/nrf_drv_wdt.h

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+/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+
+/**@file
+ * @addtogroup nrf_wdt WDT HAL and driver
+ * @ingroup nrf_drivers
+ * @brief Watchdog timer (WDT) APIs.
+ * @details The WDT HAL provides basic APIs for accessing the registers of the watchdog timer. 
+ * The WDT driver provides APIs on a higher level.
+ * @defgroup lib_driver_wdt WDT driver
+ * @{
+ * @ingroup  nrf_wdt
+ *
+ * @brief    Driver for managing the watchdog timer (WDT).
+ */
+
+#ifndef NRF_DRV_WDT_H__
+#define NRF_DRV_WDT_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "sdk_errors.h"
+#include "nrf_wdt.h"
+#include "nrf_drv_config.h"
+
+/**@brief Struct for WDT initialization. */
+typedef struct
+{
+    nrf_wdt_behaviour_t    behaviour;          /**< WDT behaviour when CPU in sleep/halt mode. */
+    uint32_t               reload_value;       /**< WDT reload value in ms. */
+    uint8_t                interrupt_priority; /**< WDT interrupt priority */
+} nrf_drv_wdt_config_t;
+
+/**@brief WDT event handler function type. */
+typedef void (*nrf_wdt_event_handler_t)(void);
+
+/**@brief WDT channel id type. */
+typedef nrf_wdt_rr_register_t nrf_drv_wdt_channel_id;
+
+#define NRF_DRV_WDT_DEAFULT_CONFIG                     \
+    {                                                  \
+        .behaviour          = WDT_CONFIG_BEHAVIOUR,    \
+        .reload_value       = WDT_CONFIG_RELOAD_VALUE, \
+        .interrupt_priority = WDT_CONFIG_IRQ_PRIORITY, \
+    }
+/**
+ * @brief This function initializes watchdog.
+ *
+ * @param[in] p_config          Initial configuration. Default configuration used if NULL.
+ * @param[in] wdt_event_handler specifies event handler provided by user.
+ *
+ * @note Function asserts if wdt_event_handler is NULL.
+ *
+ * @return    NRF_SUCCESS on success, NRF_ERROR_INVALID_STATE if module ws already initialized.
+ */
+ret_code_t nrf_drv_wdt_init(nrf_drv_wdt_config_t const * p_config,
+                            nrf_wdt_event_handler_t     wdt_event_handler);
+
+/**
+ * @brief This function allocate watchdog channel.
+ *
+ * @note This function can not be called after nrf_drv_wdt_start(void).
+ *
+ * @param[out] p_channel_id      ID of granted channel.
+ *
+ * @return    NRF_SUCCESS on success, otherwise an error code.
+ */
+ret_code_t nrf_drv_wdt_channel_alloc(nrf_drv_wdt_channel_id * p_channel_id);
+
+/**
+ * @brief This function starts watchdog.
+ *
+ * @note After calling this function the watchdog is started, so the user needs to feed all allocated
+ *       watchdog channels to avoid reset. At least one watchdog channel has to be allocated.
+ */
+void nrf_drv_wdt_enable(void);
+
+/**
+ * @brief This function feeds the watchdog.
+ *
+ * @details Function feeds all allocated watchdog channels.
+ */
+void nrf_drv_wdt_feed(void);
+
+/**
+ * @brief This function feeds the invidual watchdog channel.
+ *
+ * @param[in] channel_id      ID of watchdog channel.
+ */
+void nrf_drv_wdt_channel_feed(nrf_drv_wdt_channel_id channel_id);
+
+/**@brief Function for returning a requested task address for the wdt driver module.
+ *
+ * @param[in]  task                One of the peripheral tasks.
+ *
+ * @retval     Task address.
+ */
+__STATIC_INLINE uint32_t nrf_drv_wdt_ppi_task_addr(nrf_wdt_task_t task)
+{
+    return nrf_wdt_task_address_get(task);
+}
+
+/**@brief Function for returning a requested event address for the wdt driver module.
+ *
+ * @param[in]  event               One of the peripheral events.
+ *
+ * @retval     Event address
+ */
+__STATIC_INLINE uint32_t nrf_drv_wdt_ppi_event_addr(nrf_wdt_event_t event)
+{
+    return nrf_wdt_event_address_get(event);
+}
+#endif
+
+/** @} */