rtc, keeping time

1 files changed, 410 insertions, 0 deletions

diff --git a/drivers_nrf/timer/nrf_drv_timer.h b/drivers_nrf/timer/nrf_drv_timer.h
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+/**
+ * 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.
+ * 
+ */
+/**@file
+ * @addtogroup nrf_timer Timer HAL and driver
+ * @ingroup    nrf_drivers
+ * @brief      Timer APIs.
+ * @details    The timer HAL provides basic APIs for accessing the registers
+ *             of the timer. The timer driver provides APIs on a higher level.
+ *
+ * @defgroup   nrf_drv_timer Timer driver
+ * @{
+ * @ingroup    nrf_timer
+ * @brief      Multi-instance timer driver.
+ */
+
+#ifndef NRF_DRV_TIMER_H__
+#define NRF_DRV_TIMER_H__
+
+#include "nordic_common.h"
+#include "sdk_config.h"
+#include "nrf_timer.h"
+#include "sdk_errors.h"
+#include "nrf_assert.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Timer driver instance data structure.
+ */
+typedef struct
+{
+    NRF_TIMER_Type * p_reg;            ///< Pointer to the structure with TIMER peripheral instance registers.
+    uint8_t          instance_id;      ///< Driver instance index.
+    uint8_t          cc_channel_count; ///< Number of capture/compare channels.
+} nrf_drv_timer_t;
+
+#define ENABLED_TIMER_COUNT (TIMER0_ENABLED+TIMER1_ENABLED+TIMER2_ENABLED+TIMER3_ENABLED+TIMER4_ENABLED)
+
+#define TIMER0_INSTANCE_INDEX 0
+#define TIMER1_INSTANCE_INDEX TIMER0_INSTANCE_INDEX+TIMER0_ENABLED
+#define TIMER2_INSTANCE_INDEX TIMER1_INSTANCE_INDEX+TIMER1_ENABLED
+#define TIMER3_INSTANCE_INDEX TIMER2_INSTANCE_INDEX+TIMER2_ENABLED
+#define TIMER4_INSTANCE_INDEX TIMER3_INSTANCE_INDEX+TIMER3_ENABLED
+
+/**
+ * @brief Macro for creating a timer driver instance.
+ */
+#define NRF_DRV_TIMER_INSTANCE(id) \
+{                                                             \
+    .p_reg            = CONCAT_2(NRF_TIMER, id),              \
+    .instance_id      = CONCAT_3(TIMER, id, _INSTANCE_INDEX), \
+    .cc_channel_count = NRF_TIMER_CC_CHANNEL_COUNT(id),       \
+}
+
+/**
+ * @brief Timer driver instance configuration structure.
+ */
+typedef struct
+{
+    nrf_timer_frequency_t frequency;          ///< Frequency.
+    nrf_timer_mode_t      mode;               ///< Mode of operation.
+    nrf_timer_bit_width_t bit_width;          ///< Bit width.
+    uint8_t               interrupt_priority; ///< Interrupt priority.
+    void *                p_context;          ///< Context passed to interrupt handler.
+} nrf_drv_timer_config_t;
+
+/**
+ * @brief Timer driver instance default configuration.
+ */
+#define NRF_DRV_TIMER_DEFAULT_CONFIG \
+{                                                                               \
+    .frequency          = (nrf_timer_frequency_t)TIMER_DEFAULT_CONFIG_FREQUENCY,\
+    .mode               = (nrf_timer_mode_t)TIMER_DEFAULT_CONFIG_MODE,          \
+    .bit_width          = (nrf_timer_bit_width_t)TIMER_DEFAULT_CONFIG_BIT_WIDTH,\
+    .interrupt_priority = TIMER_DEFAULT_CONFIG_IRQ_PRIORITY,                    \
+    .p_context          = NULL                                                  \
+}
+
+/**
+ * @brief Timer driver event handler type.
+ *
+ * @param[in] event_type Timer event.
+ * @param[in] p_context  General purpose parameter set during initialization of
+ *                       the timer. This parameter can be used to pass
+ *                       additional information to the handler function, for
+ *                       example, the timer ID.
+ */
+typedef void (* nrf_timer_event_handler_t)(nrf_timer_event_t event_type,
+                                           void * p_context);
+
+/**
+ * @brief Function for initializing the timer.
+ *
+ * @param[in] p_instance          Pointer to the driver instance structure.
+ * @param[in] p_config            Initial configuration. Must not be NULL.
+ * @param[in] timer_event_handler Event handler provided by the user.
+ *                                Must not be NULL.
+ *
+ * @retval NRF_SUCCESS             If initialization was successful.
+ * @retval NRF_ERROR_INVALID_STATE If the instance is already initialized.
+ * @retval NRF_ERROR_INVALID_PARAM If no handler was provided.
+ */
+ret_code_t nrf_drv_timer_init(nrf_drv_timer_t const * const p_instance,
+                              nrf_drv_timer_config_t const * p_config,
+                              nrf_timer_event_handler_t timer_event_handler);
+
+/**
+ * @brief Function for uninitializing the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_uninit(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for turning on the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_enable(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for turning off the timer.
+ *
+ * Note that the timer will allow to enter the lowest possible SYSTEM_ON state
+ * only after this function is called.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_disable(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for pausing the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_pause(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for resuming the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_resume(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for clearing the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_clear(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for incrementing the timer.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ */
+void nrf_drv_timer_increment(nrf_drv_timer_t const * const p_instance);
+
+/**
+ * @brief Function for returning the address of a specific timer task.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] timer_task Timer task.
+ *
+ * @return Task address.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_task_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_task_t timer_task);
+
+/**
+ * @brief Function for returning the address of a specific timer capture task.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] channel    Capture channel number.
+ *
+ * @return Task address.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_capture_task_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t channel);
+
+/**
+ * @brief Function for returning the address of a specific timer event.
+ *
+ * @param[in] p_instance  Pointer to the driver instance structure.
+ * @param[in] timer_event Timer event.
+ *
+ * @return Event address.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_event_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_event_t timer_event);
+
+/**
+ * @brief Function for returning the address of a specific timer compare event.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] channel    Compare channel number.
+ *
+ * @return Event address.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_compare_event_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t channel);
+
+/**
+ * @brief Function for capturing the timer value.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] cc_channel Capture channel number.
+ *
+ * @return Captured value.
+ */
+uint32_t nrf_drv_timer_capture(nrf_drv_timer_t const * const p_instance,
+                               nrf_timer_cc_channel_t cc_channel);
+
+/**
+ * @brief Function for returning the capture value from a specific channel.
+ *
+ * Use this function to read channel values when PPI is used for capturing.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] cc_channel Capture channel number.
+ *
+ * @return Captured value.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_capture_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_cc_channel_t cc_channel);
+
+/**
+ * @brief Function for setting the timer channel in compare mode.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] cc_channel Compare channel number.
+ * @param[in] cc_value   Compare value.
+ * @param[in] enable_int Enable or disable the interrupt for the compare channel.
+ */
+void nrf_drv_timer_compare(nrf_drv_timer_t const * const p_instance,
+                           nrf_timer_cc_channel_t cc_channel,
+                           uint32_t               cc_value,
+                           bool                   enable_int);
+
+/**
+ * @brief Function for setting the timer channel in extended compare mode.
+ *
+ * @param[in] p_instance       Pointer to the driver instance structure.
+ * @param[in] cc_channel       Compare channel number.
+ * @param[in] cc_value         Compare value.
+ * @param[in] timer_short_mask Shortcut between the compare event on the channel
+ *                             and the timer task (STOP or CLEAR).
+ * @param[in] enable_int       Enable or disable the interrupt for the compare
+ *                             channel.
+ */
+void nrf_drv_timer_extended_compare(nrf_drv_timer_t const * const p_instance,
+                                    nrf_timer_cc_channel_t cc_channel,
+                                    uint32_t               cc_value,
+                                    nrf_timer_short_mask_t timer_short_mask,
+                                    bool                   enable_int);
+
+/**
+ * @brief Function for converting time in microseconds to timer ticks.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] time_us    Time in microseconds.
+ *
+ * @return Number of ticks.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_us_to_ticks(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t time_us);
+
+/**
+ * @brief Function for converting time in milliseconds to timer ticks.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] time_ms    Time in milliseconds.
+ *
+ * @return Number of ticks.
+ */
+__STATIC_INLINE uint32_t nrf_drv_timer_ms_to_ticks(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t time_ms);
+
+/**
+ * @brief Function for enabling timer compare interrupt.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] channel    Compare channel.
+ */
+void nrf_drv_timer_compare_int_enable(nrf_drv_timer_t const * const p_instance,
+                                      uint32_t channel);
+
+/**
+ * @brief Function for disabling timer compare interrupt.
+ *
+ * @param[in] p_instance Pointer to the driver instance structure.
+ * @param[in] channel    Compare channel.
+ */
+void nrf_drv_timer_compare_int_disable(nrf_drv_timer_t const * const p_instance,
+                                       uint32_t channel);
+
+
+#ifndef SUPPRESS_INLINE_IMPLEMENTATION
+
+__STATIC_INLINE uint32_t nrf_drv_timer_task_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_task_t timer_task)
+{
+    return (uint32_t)nrf_timer_task_address_get(p_instance->p_reg, timer_task);
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_capture_task_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t channel)
+{
+    ASSERT(channel < p_instance->cc_channel_count);
+    return (uint32_t)nrf_timer_task_address_get(p_instance->p_reg,
+                         nrf_timer_capture_task_get(channel));
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_event_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_event_t timer_event)
+{
+    return (uint32_t)nrf_timer_event_address_get(p_instance->p_reg, timer_event);
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_compare_event_address_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t channel)
+{
+    ASSERT(channel < p_instance->cc_channel_count);
+    return (uint32_t)nrf_timer_event_address_get(p_instance->p_reg,
+                         nrf_timer_compare_event_get(channel));
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_capture_get(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       nrf_timer_cc_channel_t cc_channel)
+{
+    return nrf_timer_cc_read(p_instance->p_reg, cc_channel);
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_us_to_ticks(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t timer_us)
+{
+    return nrf_timer_us_to_ticks(timer_us,
+        nrf_timer_frequency_get(p_instance->p_reg));
+}
+
+__STATIC_INLINE uint32_t nrf_drv_timer_ms_to_ticks(
+                                       nrf_drv_timer_t const * const p_instance,
+                                       uint32_t timer_ms)
+{
+    return nrf_timer_ms_to_ticks(timer_ms,
+        nrf_timer_frequency_get(p_instance->p_reg));
+}
+
+#endif // SUPPRESS_INLINE_IMPLEMENTATION
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NRF_DRV_TIMER_H__
+
+/** @} */