Janek Mann / nRF51822-disconnection-fix

For with fix for disconnection notifications

Fork of nRF51822 by Nordic Semiconductor

nordic/app_common/app_timer.cpp@56:a1071b629aa3, 2014-09-02 (annotated)

Committer:
Rohit Grover
Date:
Tue Sep 02 15:50:05 2014 +0100
Revision:
56:a1071b629aa3
Parent:
37:c29c330d942c 
Release 0.1.0

=============



We've achieved significant gains in power consumption: the BLE_Beacon demo now

runs at around 35uA of average current broadcasting once a second at 0dB; when

not using the radio, this demo consumes around 7uA.



Features

~~~~~~~~



- Replace initialization of high-frequency external crystal clock-source with

  the use of low-frequency clock. This brings in significant gains in power

  consumption.



- Re-implement the micro-second timer on nRF51 using the app_timer module

  (which internally uses RTC). This limits the precision of the us_Timer to

  30uS; but brings in significant gains in power consumption.



- Reduce the number of available app_timers and the event depths for app-timer

  events; this will reduce memory consumption for zero-initialized data by

  around 1K.



- Remove the call to conn_params_init() at startup. This is not mandatory; and

  was causing an unnecessary re-negotiation of connection parameters a few

  seconds into every connection.



- Reduce default transmission power level to 0dbB (was 4dbB before).



- Reduce min connection interval to 50ms and max to 500ms (previous values

  were much larger).



- Replace a few instances of use of wait() with nrf_delay_us().



- onConnection() callback now receives connection-parameters applicable to the

  new connection.



- onDataSent() callback now receives a count parameter containing the number of

  times notifications were sent out since the last callback.



- A 'reason' parameter has been added to Gap::disconnect() to indicate the

  reason for disconnection; and also to the onDisconnection callback to

  receive a reason from the remote host.



- disable the app_gpiote module by default.



Bugfixes

~~~~~~~~



- onDataWritten() callback now passes an additional parameter

  (GattServer::WriteEventCallback_t) encapsulating the update. This avoids

  having to re-fetch the updated characteristic's value attribute. It also

  fixes a bug where multiple updates to the characteristic's value-attribute

  could get clobbered if they occurred in quick succession before the

  callbacks could be processed.





Compatibility

~~~~~~~~~~~~~



Compatible with revision 0.1.0 of the BLE_API.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:eff01767de02 1 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
bogdanm 0:eff01767de02 2 *
bogdanm 0:eff01767de02 3 * The information contained herein is property of Nordic Semiconductor ASA.
bogdanm 0:eff01767de02 4 * Terms and conditions of usage are described in detail in NORDIC
bogdanm 0:eff01767de02 5 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
bogdanm 0:eff01767de02 6 *
bogdanm 0:eff01767de02 7 * Licensees are granted free, non-transferable use of the information. NO
bogdanm 0:eff01767de02 8 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
bogdanm 0:eff01767de02 9 * the file.
bogdanm 0:eff01767de02 10 *
bogdanm 0:eff01767de02 11 */
bogdanm 0:eff01767de02 12
bogdanm 0:eff01767de02 13 #include "app_timer.h"
bogdanm 0:eff01767de02 14 #include <stdlib.h>
bogdanm 0:eff01767de02 15 #include "nrf51.h"
bogdanm 0:eff01767de02 16 #include "nrf51_bitfields.h"
bogdanm 0:eff01767de02 17 #include "nrf_soc.h"
bogdanm 0:eff01767de02 18 #include "app_error.h"
Rohit Grover 56:a1071b629aa3 19 #include "nrf_delay.h"
bogdanm 0:eff01767de02 20 #include "app_util.h"
Rohit Grover 37:c29c330d942c 21 #include "app_util_platform.h"
bogdanm 0:eff01767de02 22
bogdanm 0:eff01767de02 23
bogdanm 0:eff01767de02 24 #define RTC1_IRQ_PRI APP_IRQ_PRIORITY_LOW /**< Priority of the RTC1 interrupt (used for checking for timeouts and executing timeout handlers). */
bogdanm 0:eff01767de02 25 #define SWI0_IRQ_PRI APP_IRQ_PRIORITY_LOW /**< Priority of the SWI0 interrupt (used for updating the timer list). */
bogdanm 0:eff01767de02 26
bogdanm 0:eff01767de02 27 // The current design assumes that both interrupt handlers run at the same interrupt level.
bogdanm 0:eff01767de02 28 // If this is to be changed, protection must be added to prevent them from interrupting each other
bogdanm 0:eff01767de02 29 // (e.g. by using guard/trigger flags).
bogdanm 0:eff01767de02 30 STATIC_ASSERT(RTC1_IRQ_PRI == SWI0_IRQ_PRI);
bogdanm 0:eff01767de02 31
bogdanm 0:eff01767de02 32 #define APP_HIGH_USER_ID 0 /**< User Id for the Application High "user". */
bogdanm 0:eff01767de02 33 #define APP_LOW_USER_ID 1 /**< User Id for the Application Low "user". */
bogdanm 0:eff01767de02 34 #define THREAD_MODE_USER_ID 2 /**< User Id for the Thread Mode "user". */
bogdanm 0:eff01767de02 35
bogdanm 0:eff01767de02 36 #define RTC_COMPARE_OFFSET_MIN 3 /**< Minimum offset between the current RTC counter value and the Capture Compare register. Although the nRF51 Series User Specification recommends this value to be 2, we use 3 to be safer.*/
bogdanm 0:eff01767de02 37
bogdanm 0:eff01767de02 38 #define MAX_RTC_TASKS_DELAY 47 /**< Maximum delay until an RTC task is executed. */
bogdanm 0:eff01767de02 39
bogdanm 0:eff01767de02 40 /**@brief Timer allocation state type. */
bogdanm 0:eff01767de02 41 typedef enum
bogdanm 0:eff01767de02 42 {
bogdanm 0:eff01767de02 43 STATE_FREE, /**< The timer node is available. */
bogdanm 0:eff01767de02 44 STATE_ALLOCATED /**< The timer node has been allocated. */
bogdanm 0:eff01767de02 45 } timer_alloc_state_t;
bogdanm 0:eff01767de02 46
bogdanm 0:eff01767de02 47 /**@brief Timer node type. The nodes will be used form a linked list of running timers. */
bogdanm 0:eff01767de02 48 typedef struct
bogdanm 0:eff01767de02 49 {
bogdanm 0:eff01767de02 50 timer_alloc_state_t state; /**< Timer allocation state. */
bogdanm 0:eff01767de02 51 app_timer_mode_t mode; /**< Timer mode. */
bogdanm 0:eff01767de02 52 uint32_t ticks_to_expire; /**< Number of ticks from previous timer interrupt to timer expiry. */
bogdanm 0:eff01767de02 53 uint32_t ticks_at_start; /**< Current RTC counter value when the timer was started. */
bogdanm 0:eff01767de02 54 uint32_t ticks_first_interval; /**< Number of ticks in the first timer interval. */
bogdanm 0:eff01767de02 55 uint32_t ticks_periodic_interval; /**< Timer period (for repeating timers). */
bogdanm 0:eff01767de02 56 bool is_running; /**< True if timer is running, False otherwise. */
bogdanm 0:eff01767de02 57 app_timer_timeout_handler_t p_timeout_handler; /**< Pointer to function to be executed when the timer expires. */
bogdanm 0:eff01767de02 58 void * p_context; /**< General purpose pointer. Will be passed to the timeout handler when the timer expires. */
bogdanm 0:eff01767de02 59 app_timer_id_t next; /**< Id of next timer in list of running timers. */
bogdanm 0:eff01767de02 60 } timer_node_t;
bogdanm 0:eff01767de02 61
bogdanm 0:eff01767de02 62 STATIC_ASSERT(sizeof(timer_node_t) <= APP_TIMER_NODE_SIZE);
bogdanm 0:eff01767de02 63 STATIC_ASSERT(sizeof(timer_node_t) % 4 == 0);
bogdanm 0:eff01767de02 64
bogdanm 0:eff01767de02 65 /**@brief Set of available timer operation types. */
bogdanm 0:eff01767de02 66 typedef enum
bogdanm 0:eff01767de02 67 {
bogdanm 0:eff01767de02 68 TIMER_USER_OP_TYPE_NONE, /**< Invalid timer operation type. */
bogdanm 0:eff01767de02 69 TIMER_USER_OP_TYPE_START, /**< Timer operation type Start. */
bogdanm 0:eff01767de02 70 TIMER_USER_OP_TYPE_STOP, /**< Timer operation type Stop. */
bogdanm 0:eff01767de02 71 TIMER_USER_OP_TYPE_STOP_ALL /**< Timer operation type Stop All. */
bogdanm 0:eff01767de02 72 } timer_user_op_type_t;
bogdanm 0:eff01767de02 73
bogdanm 0:eff01767de02 74 /**@brief Structure describing a timer start operation. */
bogdanm 0:eff01767de02 75 typedef struct
bogdanm 0:eff01767de02 76 {
bogdanm 0:eff01767de02 77 uint32_t ticks_at_start; /**< Current RTC counter value when the timer was started. */
bogdanm 0:eff01767de02 78 uint32_t ticks_first_interval; /**< Number of ticks in the first timer interval. */
bogdanm 0:eff01767de02 79 uint32_t ticks_periodic_interval; /**< Timer period (for repeating timers). */
bogdanm 0:eff01767de02 80 void * p_context; /**< General purpose pointer. Will be passed to the timeout handler when the timer expires. */
bogdanm 0:eff01767de02 81 } timer_user_op_start_t;
bogdanm 0:eff01767de02 82
bogdanm 0:eff01767de02 83 /**@brief Structure describing a timer operation. */
bogdanm 0:eff01767de02 84 typedef struct
bogdanm 0:eff01767de02 85 {
bogdanm 0:eff01767de02 86 timer_user_op_type_t op_type; /**< Timer operation type. */
bogdanm 0:eff01767de02 87 app_timer_id_t timer_id; /**< Id of timer on which the operation is to be performed. */
bogdanm 0:eff01767de02 88 union
bogdanm 0:eff01767de02 89 {
bogdanm 0:eff01767de02 90 timer_user_op_start_t start; /**< Structure describing a timer start operation. */
bogdanm 0:eff01767de02 91 } params;
bogdanm 0:eff01767de02 92 } timer_user_op_t;
bogdanm 0:eff01767de02 93
bogdanm 0:eff01767de02 94 STATIC_ASSERT(sizeof(timer_user_op_t) <= APP_TIMER_USER_OP_SIZE);
bogdanm 0:eff01767de02 95 STATIC_ASSERT(sizeof(timer_user_op_t) % 4 == 0);
bogdanm 0:eff01767de02 96
bogdanm 0:eff01767de02 97 /**@brief Structure describing a timer user.
bogdanm 0:eff01767de02 98 *
bogdanm 0:eff01767de02 99 * @details For each user of the timer module, there will be a timer operations queue. This queue
bogdanm 0:eff01767de02 100 * will hold timer operations issued by this user until the timer interrupt handler
bogdanm 0:eff01767de02 101 * processes these operations. For the current implementation, there will be one user for
bogdanm 0:eff01767de02 102 * each interrupt level available to the application (APP_HIGH, APP_LOW and THREAD_MODE),
bogdanm 0:eff01767de02 103 * but the module can easily be modified to e.g. have one queue per process when using an
bogdanm 0:eff01767de02 104 * RTOS. The purpose of the queues is to be able to have a completely lockless timer
bogdanm 0:eff01767de02 105 * implementation.
bogdanm 0:eff01767de02 106 */
bogdanm 0:eff01767de02 107 typedef struct
bogdanm 0:eff01767de02 108 {
bogdanm 0:eff01767de02 109 uint8_t first; /**< Index of first entry to have been inserted in the queue (i.e. the next entry to be executed). */
bogdanm 0:eff01767de02 110 uint8_t last; /**< Index of last entry to have been inserted in the queue. */
bogdanm 0:eff01767de02 111 uint8_t user_op_queue_size; /**< Queue size. */
bogdanm 0:eff01767de02 112 timer_user_op_t * p_user_op_queue; /**< Queue buffer. */
bogdanm 0:eff01767de02 113 } timer_user_t;
bogdanm 0:eff01767de02 114
bogdanm 0:eff01767de02 115 STATIC_ASSERT(sizeof(timer_user_t) == APP_TIMER_USER_SIZE);
bogdanm 0:eff01767de02 116 STATIC_ASSERT(sizeof(timer_user_t) % 4 == 0);
bogdanm 0:eff01767de02 117
bogdanm 0:eff01767de02 118 /**@brief User id type.
bogdanm 0:eff01767de02 119 *
bogdanm 0:eff01767de02 120 * @details In the current implementation, this will automatically be generated from the current
bogdanm 0:eff01767de02 121 * interrupt level.
bogdanm 0:eff01767de02 122 */
bogdanm 0:eff01767de02 123 typedef uint32_t timer_user_id_t;
bogdanm 0:eff01767de02 124
bogdanm 0:eff01767de02 125 #define CONTEXT_QUEUE_SIZE_MAX (2) /**< Timer internal elapsed ticks queue size. */
bogdanm 0:eff01767de02 126
bogdanm 0:eff01767de02 127 static uint8_t m_node_array_size; /**< Size of timer node array. */
bogdanm 0:eff01767de02 128 static timer_node_t * mp_nodes = NULL; /**< Array of timer nodes. */
bogdanm 0:eff01767de02 129 static uint8_t m_user_array_size; /**< Size of timer user array. */
bogdanm 0:eff01767de02 130 static timer_user_t * mp_users; /**< Array of timer users. */
bogdanm 0:eff01767de02 131 static app_timer_id_t m_timer_id_head; /**< First timer in list of running timers. */
bogdanm 0:eff01767de02 132 static uint32_t m_ticks_latest; /**< Last known RTC counter value. */
bogdanm 0:eff01767de02 133 static uint32_t m_ticks_elapsed[CONTEXT_QUEUE_SIZE_MAX]; /**< Timer internal elapsed ticks queue. */
bogdanm 0:eff01767de02 134 static uint8_t m_ticks_elapsed_q_read_ind; /**< Timer internal elapsed ticks queue read index. */
bogdanm 0:eff01767de02 135 static uint8_t m_ticks_elapsed_q_write_ind; /**< Timer internal elapsed ticks queue write index. */
bogdanm 0:eff01767de02 136 static app_timer_evt_schedule_func_t m_evt_schedule_func; /**< Pointer to function for propagating timeout events to the scheduler. */
Rohit Grover 56:a1071b629aa3 137 static bool m_rtc1_running; /**< Boolean indicating if RTC1 is running. */
Rohit Grover 56:a1071b629aa3 138 static volatile uint64_t overflowBits; /**< The upper 40 bits of the 64-bit value returned by cnt_get() */
bogdanm 0:eff01767de02 139
bogdanm 0:eff01767de02 140
bogdanm 0:eff01767de02 141 /**@brief Function for initializing the RTC1 counter.
bogdanm 0:eff01767de02 142 *
bogdanm 0:eff01767de02 143 * @param[in] prescaler Value of the RTC1 PRESCALER register. Set to 0 for no prescaling.
bogdanm 0:eff01767de02 144 */
bogdanm 0:eff01767de02 145 static void rtc1_init(uint32_t prescaler)
bogdanm 0:eff01767de02 146 {
bogdanm 0:eff01767de02 147 NRF_RTC1->PRESCALER = prescaler;
bogdanm 0:eff01767de02 148 NVIC_SetPriority(RTC1_IRQn, RTC1_IRQ_PRI);
bogdanm 0:eff01767de02 149 }
bogdanm 0:eff01767de02 150
bogdanm 0:eff01767de02 151
bogdanm 0:eff01767de02 152 /**@brief Function for starting the RTC1 timer.
bogdanm 0:eff01767de02 153 */
bogdanm 0:eff01767de02 154 static void rtc1_start(void)
bogdanm 0:eff01767de02 155 {
Rohit Grover 56:a1071b629aa3 156 if (m_rtc1_running) {
Rohit Grover 56:a1071b629aa3 157 return;
Rohit Grover 56:a1071b629aa3 158 }
Rohit Grover 56:a1071b629aa3 159
bogdanm 0:eff01767de02 160 NRF_RTC1->EVTENSET = RTC_EVTEN_COMPARE0_Msk;
Rohit Grover 56:a1071b629aa3 161 NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE0_Msk | RTC_INTENSET_OVRFLW_Msk;
bogdanm 0:eff01767de02 162
bogdanm 0:eff01767de02 163 NVIC_ClearPendingIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 164 NVIC_EnableIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 165
bogdanm 0:eff01767de02 166 NRF_RTC1->TASKS_START = 1;
Rohit Grover 56:a1071b629aa3 167 nrf_delay_us(MAX_RTC_TASKS_DELAY);
Rohit Grover 56:a1071b629aa3 168
Rohit Grover 56:a1071b629aa3 169 m_rtc1_running = true;
bogdanm 0:eff01767de02 170 }
bogdanm 0:eff01767de02 171
bogdanm 0:eff01767de02 172
bogdanm 0:eff01767de02 173 /**@brief Function for stopping the RTC1 timer.
bogdanm 0:eff01767de02 174 */
bogdanm 0:eff01767de02 175 static void rtc1_stop(void)
bogdanm 0:eff01767de02 176 {
Rohit Grover 56:a1071b629aa3 177 if (!m_rtc1_running) {
Rohit Grover 56:a1071b629aa3 178 return;
Rohit Grover 56:a1071b629aa3 179 }
Rohit Grover 56:a1071b629aa3 180
bogdanm 0:eff01767de02 181 NVIC_DisableIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 182
bogdanm 0:eff01767de02 183 NRF_RTC1->EVTENCLR = RTC_EVTEN_COMPARE0_Msk;
Rohit Grover 56:a1071b629aa3 184 NRF_RTC1->INTENCLR = RTC_INTENSET_COMPARE0_Msk | RTC_INTENSET_OVRFLW_Msk;
bogdanm 0:eff01767de02 185
bogdanm 0:eff01767de02 186 NRF_RTC1->TASKS_STOP = 1;
Rohit Grover 56:a1071b629aa3 187 nrf_delay_us(MAX_RTC_TASKS_DELAY);
Rohit Grover 56:a1071b629aa3 188
Rohit Grover 56:a1071b629aa3 189 NRF_RTC1->TASKS_CLEAR = 1;
Rohit Grover 56:a1071b629aa3 190 m_ticks_latest = 0;
Rohit Grover 56:a1071b629aa3 191 nrf_delay_us(MAX_RTC_TASKS_DELAY);
Rohit Grover 56:a1071b629aa3 192
Rohit Grover 56:a1071b629aa3 193 m_rtc1_running = false;
bogdanm 0:eff01767de02 194 }
bogdanm 0:eff01767de02 195
bogdanm 0:eff01767de02 196
bogdanm 0:eff01767de02 197 /**@brief Function for returning the current value of the RTC1 counter.
bogdanm 0:eff01767de02 198 *
bogdanm 0:eff01767de02 199 * @return Current value of the RTC1 counter.
bogdanm 0:eff01767de02 200 */
bogdanm 0:eff01767de02 201 static __INLINE uint32_t rtc1_counter_get(void)
bogdanm 0:eff01767de02 202 {
bogdanm 0:eff01767de02 203 return NRF_RTC1->COUNTER;
bogdanm 0:eff01767de02 204 }
bogdanm 0:eff01767de02 205
bogdanm 0:eff01767de02 206
bogdanm 0:eff01767de02 207 /**@brief Function for computing the difference between two RTC1 counter values.
bogdanm 0:eff01767de02 208 *
bogdanm 0:eff01767de02 209 * @return Number of ticks elapsed from ticks_old to ticks_now.
bogdanm 0:eff01767de02 210 */
bogdanm 0:eff01767de02 211 static __INLINE uint32_t ticks_diff_get(uint32_t ticks_now, uint32_t ticks_old)
bogdanm 0:eff01767de02 212 {
bogdanm 0:eff01767de02 213 return ((ticks_now - ticks_old) & MAX_RTC_COUNTER_VAL);
bogdanm 0:eff01767de02 214 }
bogdanm 0:eff01767de02 215
bogdanm 0:eff01767de02 216
bogdanm 0:eff01767de02 217 /**@brief Function for setting the RTC1 Capture Compare register 0, and enabling the corresponding
bogdanm 0:eff01767de02 218 * event.
bogdanm 0:eff01767de02 219 *
bogdanm 0:eff01767de02 220 * @param[in] value New value of Capture Compare register 0.
bogdanm 0:eff01767de02 221 */
bogdanm 0:eff01767de02 222 static __INLINE void rtc1_compare0_set(uint32_t value)
bogdanm 0:eff01767de02 223 {
bogdanm 0:eff01767de02 224 NRF_RTC1->CC[0] = value;
bogdanm 0:eff01767de02 225 }
bogdanm 0:eff01767de02 226
bogdanm 0:eff01767de02 227
bogdanm 0:eff01767de02 228 /**@brief Function for inserting a timer in the timer list.
bogdanm 0:eff01767de02 229 *
bogdanm 0:eff01767de02 230 * @param[in] timer_id Id of timer to insert.
bogdanm 0:eff01767de02 231 */
bogdanm 0:eff01767de02 232 static void timer_list_insert(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 233 {
bogdanm 0:eff01767de02 234 timer_node_t * p_timer = &mp_nodes[timer_id];
Rohit Grover 37:c29c330d942c 235
bogdanm 0:eff01767de02 236 if (m_timer_id_head == TIMER_NULL)
bogdanm 0:eff01767de02 237 {
bogdanm 0:eff01767de02 238 m_timer_id_head = timer_id;
bogdanm 0:eff01767de02 239 }
bogdanm 0:eff01767de02 240 else
bogdanm 0:eff01767de02 241 {
bogdanm 0:eff01767de02 242 if (p_timer->ticks_to_expire <= mp_nodes[m_timer_id_head].ticks_to_expire)
bogdanm 0:eff01767de02 243 {
bogdanm 0:eff01767de02 244 mp_nodes[m_timer_id_head].ticks_to_expire -= p_timer->ticks_to_expire;
Rohit Grover 37:c29c330d942c 245
bogdanm 0:eff01767de02 246 p_timer->next = m_timer_id_head;
bogdanm 0:eff01767de02 247 m_timer_id_head = timer_id;
bogdanm 0:eff01767de02 248 }
bogdanm 0:eff01767de02 249 else
bogdanm 0:eff01767de02 250 {
bogdanm 0:eff01767de02 251 app_timer_id_t previous;
bogdanm 0:eff01767de02 252 app_timer_id_t current;
bogdanm 0:eff01767de02 253 uint32_t ticks_to_expire;
bogdanm 0:eff01767de02 254
bogdanm 0:eff01767de02 255 ticks_to_expire = p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 256 previous = m_timer_id_head;
bogdanm 0:eff01767de02 257 current = m_timer_id_head;
Rohit Grover 37:c29c330d942c 258
bogdanm 0:eff01767de02 259 while ((current != TIMER_NULL) && (ticks_to_expire > mp_nodes[current].ticks_to_expire))
bogdanm 0:eff01767de02 260 {
bogdanm 0:eff01767de02 261 ticks_to_expire -= mp_nodes[current].ticks_to_expire;
bogdanm 0:eff01767de02 262 previous = current;
bogdanm 0:eff01767de02 263 current = mp_nodes[current].next;
bogdanm 0:eff01767de02 264 }
bogdanm 0:eff01767de02 265
bogdanm 0:eff01767de02 266 if (current != TIMER_NULL)
bogdanm 0:eff01767de02 267 {
bogdanm 0:eff01767de02 268 mp_nodes[current].ticks_to_expire -= ticks_to_expire;
bogdanm 0:eff01767de02 269 }
bogdanm 0:eff01767de02 270
bogdanm 0:eff01767de02 271 p_timer->ticks_to_expire = ticks_to_expire;
bogdanm 0:eff01767de02 272 p_timer->next = current;
bogdanm 0:eff01767de02 273 mp_nodes[previous].next = timer_id;
bogdanm 0:eff01767de02 274 }
bogdanm 0:eff01767de02 275 }
bogdanm 0:eff01767de02 276 }
bogdanm 0:eff01767de02 277
bogdanm 0:eff01767de02 278
bogdanm 0:eff01767de02 279 /**@brief Function for removing a timer from the timer queue.
bogdanm 0:eff01767de02 280 *
bogdanm 0:eff01767de02 281 * @param[in] timer_id Id of timer to remove.
bogdanm 0:eff01767de02 282 */
bogdanm 0:eff01767de02 283 static void timer_list_remove(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 284 {
bogdanm 0:eff01767de02 285 app_timer_id_t previous;
bogdanm 0:eff01767de02 286 app_timer_id_t current;
bogdanm 0:eff01767de02 287 uint32_t timeout;
bogdanm 0:eff01767de02 288
bogdanm 0:eff01767de02 289 // Find the timer's position in timer list
bogdanm 0:eff01767de02 290 previous = m_timer_id_head;
bogdanm 0:eff01767de02 291 current = previous;
Rohit Grover 37:c29c330d942c 292
bogdanm 0:eff01767de02 293 while (current != TIMER_NULL)
bogdanm 0:eff01767de02 294 {
bogdanm 0:eff01767de02 295 if (current == timer_id)
bogdanm 0:eff01767de02 296 {
bogdanm 0:eff01767de02 297 break;
bogdanm 0:eff01767de02 298 }
bogdanm 0:eff01767de02 299 previous = current;
bogdanm 0:eff01767de02 300 current = mp_nodes[current].next;
bogdanm 0:eff01767de02 301 }
bogdanm 0:eff01767de02 302
bogdanm 0:eff01767de02 303 // Timer not in active list
bogdanm 0:eff01767de02 304 if (current == TIMER_NULL)
bogdanm 0:eff01767de02 305 {
bogdanm 0:eff01767de02 306 return;
bogdanm 0:eff01767de02 307 }
bogdanm 0:eff01767de02 308
bogdanm 0:eff01767de02 309 // Timer is the first in the list
bogdanm 0:eff01767de02 310 if (previous == current)
bogdanm 0:eff01767de02 311 {
bogdanm 0:eff01767de02 312 m_timer_id_head = mp_nodes[m_timer_id_head].next;
Rohit Grover 56:a1071b629aa3 313
Rohit Grover 56:a1071b629aa3 314 // No more timers in the list. Disable RTC1.
Rohit Grover 56:a1071b629aa3 315 if (m_timer_id_head == TIMER_NULL)
Rohit Grover 56:a1071b629aa3 316 {
Rohit Grover 56:a1071b629aa3 317 rtc1_stop();
Rohit Grover 56:a1071b629aa3 318 }
bogdanm 0:eff01767de02 319 }
bogdanm 0:eff01767de02 320
bogdanm 0:eff01767de02 321 // Remaining timeout between next timeout
bogdanm 0:eff01767de02 322 timeout = mp_nodes[current].ticks_to_expire;
bogdanm 0:eff01767de02 323
bogdanm 0:eff01767de02 324 // Link previous timer with next of this timer, i.e. removing the timer from list
bogdanm 0:eff01767de02 325 mp_nodes[previous].next = mp_nodes[current].next;
bogdanm 0:eff01767de02 326
bogdanm 0:eff01767de02 327 // If this is not the last timer, increment the next timer by this timer timeout
bogdanm 0:eff01767de02 328 current = mp_nodes[previous].next;
bogdanm 0:eff01767de02 329 if (current != TIMER_NULL)
bogdanm 0:eff01767de02 330 {
bogdanm 0:eff01767de02 331 mp_nodes[current].ticks_to_expire += timeout;
bogdanm 0:eff01767de02 332 }
bogdanm 0:eff01767de02 333 }
bogdanm 0:eff01767de02 334
bogdanm 0:eff01767de02 335
bogdanm 0:eff01767de02 336 /**@brief Function for scheduling a check for timeouts by generating a RTC1 interrupt.
bogdanm 0:eff01767de02 337 */
bogdanm 0:eff01767de02 338 static void timer_timeouts_check_sched(void)
bogdanm 0:eff01767de02 339 {
bogdanm 0:eff01767de02 340 NVIC_SetPendingIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 341 }
bogdanm 0:eff01767de02 342
bogdanm 0:eff01767de02 343
bogdanm 0:eff01767de02 344 /**@brief Function for scheduling a timer list update by generating a SWI0 interrupt.
bogdanm 0:eff01767de02 345 */
bogdanm 0:eff01767de02 346 static void timer_list_handler_sched(void)
bogdanm 0:eff01767de02 347 {
bogdanm 0:eff01767de02 348 NVIC_SetPendingIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 349 }
bogdanm 0:eff01767de02 350
bogdanm 0:eff01767de02 351
bogdanm 0:eff01767de02 352 /**@brief Function for executing an application timeout handler, either by calling it directly, or
bogdanm 0:eff01767de02 353 * by passing an event to the @ref app_scheduler.
bogdanm 0:eff01767de02 354 *
bogdanm 0:eff01767de02 355 * @param[in] p_timer Pointer to expired timer.
bogdanm 0:eff01767de02 356 */
bogdanm 0:eff01767de02 357 static void timeout_handler_exec(timer_node_t * p_timer)
bogdanm 0:eff01767de02 358 {
bogdanm 0:eff01767de02 359 if (m_evt_schedule_func != NULL)
bogdanm 0:eff01767de02 360 {
bogdanm 0:eff01767de02 361 uint32_t err_code = m_evt_schedule_func(p_timer->p_timeout_handler, p_timer->p_context);
bogdanm 0:eff01767de02 362 APP_ERROR_CHECK(err_code);
bogdanm 0:eff01767de02 363 }
bogdanm 0:eff01767de02 364 else
bogdanm 0:eff01767de02 365 {
bogdanm 0:eff01767de02 366 p_timer->p_timeout_handler(p_timer->p_context);
bogdanm 0:eff01767de02 367 }
bogdanm 0:eff01767de02 368 }
bogdanm 0:eff01767de02 369
bogdanm 0:eff01767de02 370
bogdanm 0:eff01767de02 371 /**@brief Function for checking for expired timers.
bogdanm 0:eff01767de02 372 */
bogdanm 0:eff01767de02 373 static void timer_timeouts_check(void)
bogdanm 0:eff01767de02 374 {
Rohit Grover 37:c29c330d942c 375 // Handle expired of timer
bogdanm 0:eff01767de02 376 if (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 377 {
bogdanm 0:eff01767de02 378 app_timer_id_t timer_id;
bogdanm 0:eff01767de02 379 uint32_t ticks_elapsed;
bogdanm 0:eff01767de02 380 uint32_t ticks_expired;
bogdanm 0:eff01767de02 381
Rohit Grover 37:c29c330d942c 382 // Initialize actual elapsed ticks being consumed to 0
bogdanm 0:eff01767de02 383 ticks_expired = 0;
bogdanm 0:eff01767de02 384
bogdanm 0:eff01767de02 385 // ticks_elapsed is collected here, job will use it
bogdanm 0:eff01767de02 386 ticks_elapsed = ticks_diff_get(rtc1_counter_get(), m_ticks_latest);
bogdanm 0:eff01767de02 387
Rohit Grover 37:c29c330d942c 388 // Auto variable containing the head of timers expiring
bogdanm 0:eff01767de02 389 timer_id = m_timer_id_head;
bogdanm 0:eff01767de02 390
Rohit Grover 37:c29c330d942c 391 // Expire all timers within ticks_elapsed and collect ticks_expired
bogdanm 0:eff01767de02 392 while (timer_id != TIMER_NULL)
bogdanm 0:eff01767de02 393 {
bogdanm 0:eff01767de02 394 timer_node_t * p_timer;
bogdanm 0:eff01767de02 395
Rohit Grover 37:c29c330d942c 396 // Auto variable for current timer node
bogdanm 0:eff01767de02 397 p_timer = &mp_nodes[timer_id];
bogdanm 0:eff01767de02 398
Rohit Grover 37:c29c330d942c 399 // Do nothing if timer did not expire
bogdanm 0:eff01767de02 400 if (ticks_elapsed < p_timer->ticks_to_expire)
bogdanm 0:eff01767de02 401 {
bogdanm 0:eff01767de02 402 break;
bogdanm 0:eff01767de02 403 }
bogdanm 0:eff01767de02 404
Rohit Grover 37:c29c330d942c 405 // Decrement ticks_elapsed and collect expired ticks
bogdanm 0:eff01767de02 406 ticks_elapsed -= p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 407 ticks_expired += p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 408
Rohit Grover 37:c29c330d942c 409 // Move to next timer
bogdanm 0:eff01767de02 410 timer_id = p_timer->next;
bogdanm 0:eff01767de02 411
Rohit Grover 37:c29c330d942c 412 // Execute Task
bogdanm 0:eff01767de02 413 timeout_handler_exec(p_timer);
bogdanm 0:eff01767de02 414 }
bogdanm 0:eff01767de02 415
bogdanm 0:eff01767de02 416 // Prepare to queue the ticks expired in the m_ticks_elapsed queue.
bogdanm 0:eff01767de02 417 if (m_ticks_elapsed_q_read_ind == m_ticks_elapsed_q_write_ind)
bogdanm 0:eff01767de02 418 {
bogdanm 0:eff01767de02 419 // The read index of the queue is equal to the write index. This means the new
bogdanm 0:eff01767de02 420 // value of ticks_expired should be stored at a new location in the m_ticks_elapsed
bogdanm 0:eff01767de02 421 // queue (which is implemented as a double buffer).
bogdanm 0:eff01767de02 422
bogdanm 0:eff01767de02 423 // Check if there will be a queue overflow.
bogdanm 0:eff01767de02 424 if (++m_ticks_elapsed_q_write_ind == CONTEXT_QUEUE_SIZE_MAX)
bogdanm 0:eff01767de02 425 {
bogdanm 0:eff01767de02 426 // There will be a queue overflow. Hence the write index should point to the start
bogdanm 0:eff01767de02 427 // of the queue.
bogdanm 0:eff01767de02 428 m_ticks_elapsed_q_write_ind = 0;
bogdanm 0:eff01767de02 429 }
bogdanm 0:eff01767de02 430 }
bogdanm 0:eff01767de02 431
bogdanm 0:eff01767de02 432 // Queue the ticks expired.
bogdanm 0:eff01767de02 433 m_ticks_elapsed[m_ticks_elapsed_q_write_ind] = ticks_expired;
bogdanm 0:eff01767de02 434
bogdanm 0:eff01767de02 435 timer_list_handler_sched();
bogdanm 0:eff01767de02 436 }
bogdanm 0:eff01767de02 437 }
bogdanm 0:eff01767de02 438
bogdanm 0:eff01767de02 439
bogdanm 0:eff01767de02 440 /**@brief Function for acquiring the number of ticks elapsed.
bogdanm 0:eff01767de02 441 *
bogdanm 0:eff01767de02 442 * @param[out] p_ticks_elapsed Number of ticks elapsed.
bogdanm 0:eff01767de02 443 *
bogdanm 0:eff01767de02 444 * @return TRUE if elapsed ticks was read from queue, FALSE otherwise.
bogdanm 0:eff01767de02 445 */
bogdanm 0:eff01767de02 446 static bool elapsed_ticks_acquire(uint32_t * p_ticks_elapsed)
bogdanm 0:eff01767de02 447 {
Rohit Grover 37:c29c330d942c 448 // Pick the elapsed value from queue
bogdanm 0:eff01767de02 449 if (m_ticks_elapsed_q_read_ind != m_ticks_elapsed_q_write_ind)
bogdanm 0:eff01767de02 450 {
Rohit Grover 37:c29c330d942c 451 // Dequeue elapsed value
bogdanm 0:eff01767de02 452 m_ticks_elapsed_q_read_ind++;
bogdanm 0:eff01767de02 453 if (m_ticks_elapsed_q_read_ind == CONTEXT_QUEUE_SIZE_MAX)
bogdanm 0:eff01767de02 454 {
bogdanm 0:eff01767de02 455 m_ticks_elapsed_q_read_ind = 0;
bogdanm 0:eff01767de02 456 }
bogdanm 0:eff01767de02 457
bogdanm 0:eff01767de02 458 *p_ticks_elapsed = m_ticks_elapsed[m_ticks_elapsed_q_read_ind];
bogdanm 0:eff01767de02 459
bogdanm 0:eff01767de02 460 m_ticks_latest += *p_ticks_elapsed;
bogdanm 0:eff01767de02 461 m_ticks_latest &= MAX_RTC_COUNTER_VAL;
bogdanm 0:eff01767de02 462
bogdanm 0:eff01767de02 463 return true;
bogdanm 0:eff01767de02 464 }
bogdanm 0:eff01767de02 465 else
bogdanm 0:eff01767de02 466 {
Rohit Grover 37:c29c330d942c 467 // No elapsed value in queue
bogdanm 0:eff01767de02 468 *p_ticks_elapsed = 0;
bogdanm 0:eff01767de02 469 return false;
bogdanm 0:eff01767de02 470 }
bogdanm 0:eff01767de02 471 }
bogdanm 0:eff01767de02 472
bogdanm 0:eff01767de02 473
bogdanm 0:eff01767de02 474 /**@brief Function for handling the timer list deletions.
bogdanm 0:eff01767de02 475 *
bogdanm 0:eff01767de02 476 * @return TRUE if Capture Compare register must be updated, FALSE otherwise.
bogdanm 0:eff01767de02 477 */
bogdanm 0:eff01767de02 478 static bool list_deletions_handler(void)
bogdanm 0:eff01767de02 479 {
bogdanm 0:eff01767de02 480 app_timer_id_t timer_id_old_head;
bogdanm 0:eff01767de02 481 uint8_t user_id;
bogdanm 0:eff01767de02 482
bogdanm 0:eff01767de02 483 // Remember the old head, so as to decide if new compare needs to be set
bogdanm 0:eff01767de02 484 timer_id_old_head = m_timer_id_head;
bogdanm 0:eff01767de02 485
bogdanm 0:eff01767de02 486 user_id = m_user_array_size;
bogdanm 0:eff01767de02 487 while (user_id--)
bogdanm 0:eff01767de02 488 {
bogdanm 0:eff01767de02 489 timer_user_t * p_user = &mp_users[user_id];
bogdanm 0:eff01767de02 490 uint8_t user_ops_first = p_user->first;
Rohit Grover 37:c29c330d942c 491
bogdanm 0:eff01767de02 492 while (user_ops_first != p_user->last)
bogdanm 0:eff01767de02 493 {
bogdanm 0:eff01767de02 494 timer_node_t * p_timer;
bogdanm 0:eff01767de02 495 timer_user_op_t * p_user_op = &p_user->p_user_op_queue[user_ops_first];
bogdanm 0:eff01767de02 496
Rohit Grover 37:c29c330d942c 497 // Traverse to next operation in queue
bogdanm 0:eff01767de02 498 user_ops_first++;
bogdanm 0:eff01767de02 499 if (user_ops_first == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 500 {
bogdanm 0:eff01767de02 501 user_ops_first = 0;
bogdanm 0:eff01767de02 502 }
bogdanm 0:eff01767de02 503
bogdanm 0:eff01767de02 504 switch (p_user_op->op_type)
bogdanm 0:eff01767de02 505 {
bogdanm 0:eff01767de02 506 case TIMER_USER_OP_TYPE_STOP:
bogdanm 0:eff01767de02 507 // Delete node if timer is running
bogdanm 0:eff01767de02 508 p_timer = &mp_nodes[p_user_op->timer_id];
bogdanm 0:eff01767de02 509 if (p_timer->is_running)
bogdanm 0:eff01767de02 510 {
bogdanm 0:eff01767de02 511 timer_list_remove(p_user_op->timer_id);
bogdanm 0:eff01767de02 512 p_timer->is_running = false;
bogdanm 0:eff01767de02 513 }
bogdanm 0:eff01767de02 514 break;
Rohit Grover 37:c29c330d942c 515
bogdanm 0:eff01767de02 516 case TIMER_USER_OP_TYPE_STOP_ALL:
bogdanm 0:eff01767de02 517 // Delete list of running timers, and mark all timers as not running
bogdanm 0:eff01767de02 518 while (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 519 {
bogdanm 0:eff01767de02 520 timer_node_t * p_head = &mp_nodes[m_timer_id_head];
bogdanm 0:eff01767de02 521
bogdanm 0:eff01767de02 522 p_head->is_running = false;
bogdanm 0:eff01767de02 523 m_timer_id_head = p_head->next;
bogdanm 0:eff01767de02 524 }
bogdanm 0:eff01767de02 525 break;
Rohit Grover 37:c29c330d942c 526
bogdanm 0:eff01767de02 527 default:
bogdanm 0:eff01767de02 528 // No implementation needed.
bogdanm 0:eff01767de02 529 break;
bogdanm 0:eff01767de02 530 }
bogdanm 0:eff01767de02 531 }
bogdanm 0:eff01767de02 532 }
bogdanm 0:eff01767de02 533
bogdanm 0:eff01767de02 534 // Detect change in head of the list
bogdanm 0:eff01767de02 535 return (m_timer_id_head != timer_id_old_head);
bogdanm 0:eff01767de02 536 }
bogdanm 0:eff01767de02 537
bogdanm 0:eff01767de02 538
bogdanm 0:eff01767de02 539 /**@brief Function for updating the timer list for expired timers.
bogdanm 0:eff01767de02 540 *
bogdanm 0:eff01767de02 541 * @param[in] ticks_elapsed Number of elapsed ticks.
bogdanm 0:eff01767de02 542 * @param[in] ticks_previous Previous known value of the RTC counter.
bogdanm 0:eff01767de02 543 * @param[out] p_restart_list_head List of repeating timers to be restarted.
bogdanm 0:eff01767de02 544 */
bogdanm 0:eff01767de02 545 static void expired_timers_handler(uint32_t ticks_elapsed,
bogdanm 0:eff01767de02 546 uint32_t ticks_previous,
bogdanm 0:eff01767de02 547 app_timer_id_t * p_restart_list_head)
bogdanm 0:eff01767de02 548 {
bogdanm 0:eff01767de02 549 uint32_t ticks_expired = 0;
bogdanm 0:eff01767de02 550
bogdanm 0:eff01767de02 551 while (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 552 {
bogdanm 0:eff01767de02 553 timer_node_t * p_timer;
bogdanm 0:eff01767de02 554 app_timer_id_t id_expired;
bogdanm 0:eff01767de02 555
Rohit Grover 37:c29c330d942c 556 // Auto variable for current timer node
bogdanm 0:eff01767de02 557 p_timer = &mp_nodes[m_timer_id_head];
bogdanm 0:eff01767de02 558
Rohit Grover 37:c29c330d942c 559 // Do nothing if timer did not expire
bogdanm 0:eff01767de02 560 if (ticks_elapsed < p_timer->ticks_to_expire)
bogdanm 0:eff01767de02 561 {
bogdanm 0:eff01767de02 562 p_timer->ticks_to_expire -= ticks_elapsed;
bogdanm 0:eff01767de02 563 break;
bogdanm 0:eff01767de02 564 }
bogdanm 0:eff01767de02 565
Rohit Grover 37:c29c330d942c 566 // Decrement ticks_elapsed and collect expired ticks
bogdanm 0:eff01767de02 567 ticks_elapsed -= p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 568 ticks_expired += p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 569
bogdanm 0:eff01767de02 570 // Timer expired, set ticks_to_expire zero
bogdanm 0:eff01767de02 571 p_timer->ticks_to_expire = 0;
bogdanm 0:eff01767de02 572 p_timer->is_running = false;
bogdanm 0:eff01767de02 573
Rohit Grover 37:c29c330d942c 574 // Remove the expired timer from head
bogdanm 0:eff01767de02 575 id_expired = m_timer_id_head;
bogdanm 0:eff01767de02 576 m_timer_id_head = p_timer->next;
bogdanm 0:eff01767de02 577
Rohit Grover 37:c29c330d942c 578 // Timer will be restarted if periodic
bogdanm 0:eff01767de02 579 if (p_timer->ticks_periodic_interval != 0)
bogdanm 0:eff01767de02 580 {
bogdanm 0:eff01767de02 581 p_timer->ticks_at_start = (ticks_previous + ticks_expired) & MAX_RTC_COUNTER_VAL;
bogdanm 0:eff01767de02 582 p_timer->ticks_first_interval = p_timer->ticks_periodic_interval;
bogdanm 0:eff01767de02 583 p_timer->next = *p_restart_list_head;
bogdanm 0:eff01767de02 584 *p_restart_list_head = id_expired;
bogdanm 0:eff01767de02 585 }
bogdanm 0:eff01767de02 586 }
bogdanm 0:eff01767de02 587 }
bogdanm 0:eff01767de02 588
bogdanm 0:eff01767de02 589
bogdanm 0:eff01767de02 590 /**@brief Function for handling timer list insertions.
bogdanm 0:eff01767de02 591 *
bogdanm 0:eff01767de02 592 * @param[in] p_restart_list_head List of repeating timers to be restarted.
bogdanm 0:eff01767de02 593 *
bogdanm 0:eff01767de02 594 * @return TRUE if Capture Compare register must be updated, FALSE otherwise.
bogdanm 0:eff01767de02 595 */
bogdanm 0:eff01767de02 596 static bool list_insertions_handler(app_timer_id_t restart_list_head)
bogdanm 0:eff01767de02 597 {
bogdanm 0:eff01767de02 598 app_timer_id_t timer_id_old_head;
bogdanm 0:eff01767de02 599 uint8_t user_id;
bogdanm 0:eff01767de02 600
bogdanm 0:eff01767de02 601 // Remember the old head, so as to decide if new compare needs to be set
bogdanm 0:eff01767de02 602 timer_id_old_head = m_timer_id_head;
bogdanm 0:eff01767de02 603
bogdanm 0:eff01767de02 604 user_id = m_user_array_size;
bogdanm 0:eff01767de02 605 while (user_id--)
bogdanm 0:eff01767de02 606 {
bogdanm 0:eff01767de02 607 timer_user_t * p_user = &mp_users[user_id];
bogdanm 0:eff01767de02 608
Rohit Grover 37:c29c330d942c 609 // Handle insertions of timers
bogdanm 0:eff01767de02 610 while ((restart_list_head != TIMER_NULL) || (p_user->first != p_user->last))
bogdanm 0:eff01767de02 611 {
bogdanm 0:eff01767de02 612 app_timer_id_t id_start;
bogdanm 0:eff01767de02 613 timer_node_t * p_timer;
bogdanm 0:eff01767de02 614
bogdanm 0:eff01767de02 615 if (restart_list_head != TIMER_NULL)
bogdanm 0:eff01767de02 616 {
bogdanm 0:eff01767de02 617 id_start = restart_list_head;
bogdanm 0:eff01767de02 618 p_timer = &mp_nodes[id_start];
bogdanm 0:eff01767de02 619 restart_list_head = p_timer->next;
bogdanm 0:eff01767de02 620 }
bogdanm 0:eff01767de02 621 else
bogdanm 0:eff01767de02 622 {
bogdanm 0:eff01767de02 623 timer_user_op_t * p_user_op = &p_user->p_user_op_queue[p_user->first];
bogdanm 0:eff01767de02 624
bogdanm 0:eff01767de02 625 p_user->first++;
bogdanm 0:eff01767de02 626 if (p_user->first == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 627 {
bogdanm 0:eff01767de02 628 p_user->first = 0;
bogdanm 0:eff01767de02 629 }
bogdanm 0:eff01767de02 630
bogdanm 0:eff01767de02 631 id_start = p_user_op->timer_id;
bogdanm 0:eff01767de02 632 p_timer = &mp_nodes[id_start];
bogdanm 0:eff01767de02 633
bogdanm 0:eff01767de02 634 if ((p_user_op->op_type != TIMER_USER_OP_TYPE_START) || p_timer->is_running)
bogdanm 0:eff01767de02 635 {
bogdanm 0:eff01767de02 636 continue;
bogdanm 0:eff01767de02 637 }
bogdanm 0:eff01767de02 638
bogdanm 0:eff01767de02 639 p_timer->ticks_at_start = p_user_op->params.start.ticks_at_start;
bogdanm 0:eff01767de02 640 p_timer->ticks_first_interval = p_user_op->params.start.ticks_first_interval;
bogdanm 0:eff01767de02 641 p_timer->ticks_periodic_interval = p_user_op->params.start.ticks_periodic_interval;
bogdanm 0:eff01767de02 642 p_timer->p_context = p_user_op->params.start.p_context;
bogdanm 0:eff01767de02 643 }
bogdanm 0:eff01767de02 644
Rohit Grover 37:c29c330d942c 645 // Prepare the node to be inserted
bogdanm 0:eff01767de02 646 if (
bogdanm 0:eff01767de02 647 ((p_timer->ticks_at_start - m_ticks_latest) & MAX_RTC_COUNTER_VAL)
bogdanm 0:eff01767de02 648 <
bogdanm 0:eff01767de02 649 (MAX_RTC_COUNTER_VAL / 2)
bogdanm 0:eff01767de02 650 )
bogdanm 0:eff01767de02 651 {
Rohit Grover 37:c29c330d942c 652 p_timer->ticks_to_expire = ticks_diff_get(p_timer->ticks_at_start, m_ticks_latest) +
bogdanm 0:eff01767de02 653 p_timer->ticks_first_interval;
bogdanm 0:eff01767de02 654 }
bogdanm 0:eff01767de02 655 else
bogdanm 0:eff01767de02 656 {
bogdanm 0:eff01767de02 657 uint32_t delta_current_start;
bogdanm 0:eff01767de02 658
bogdanm 0:eff01767de02 659 delta_current_start = ticks_diff_get(m_ticks_latest, p_timer->ticks_at_start);
bogdanm 0:eff01767de02 660 if (p_timer->ticks_first_interval > delta_current_start)
bogdanm 0:eff01767de02 661 {
bogdanm 0:eff01767de02 662 p_timer->ticks_to_expire = p_timer->ticks_first_interval - delta_current_start;
bogdanm 0:eff01767de02 663 }
bogdanm 0:eff01767de02 664 else
bogdanm 0:eff01767de02 665 {
bogdanm 0:eff01767de02 666 p_timer->ticks_to_expire = 0;
bogdanm 0:eff01767de02 667 }
bogdanm 0:eff01767de02 668 }
bogdanm 0:eff01767de02 669
bogdanm 0:eff01767de02 670 p_timer->ticks_at_start = 0;
bogdanm 0:eff01767de02 671 p_timer->ticks_first_interval = 0;
bogdanm 0:eff01767de02 672 p_timer->is_running = true;
bogdanm 0:eff01767de02 673 p_timer->next = TIMER_NULL;
bogdanm 0:eff01767de02 674
Rohit Grover 37:c29c330d942c 675 // Insert into list
bogdanm 0:eff01767de02 676 timer_list_insert(id_start);
bogdanm 0:eff01767de02 677 }
bogdanm 0:eff01767de02 678 }
Rohit Grover 37:c29c330d942c 679
bogdanm 0:eff01767de02 680 return (m_timer_id_head != timer_id_old_head);
bogdanm 0:eff01767de02 681 }
bogdanm 0:eff01767de02 682
bogdanm 0:eff01767de02 683
bogdanm 0:eff01767de02 684 /**@brief Function for updating the Capture Compare register.
bogdanm 0:eff01767de02 685 */
bogdanm 0:eff01767de02 686 static void compare_reg_update(app_timer_id_t timer_id_head_old)
bogdanm 0:eff01767de02 687 {
Rohit Grover 37:c29c330d942c 688 // Setup the timeout for timers on the head of the list
bogdanm 0:eff01767de02 689 if (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 690 {
bogdanm 0:eff01767de02 691 uint32_t ticks_to_expire = mp_nodes[m_timer_id_head].ticks_to_expire;
bogdanm 0:eff01767de02 692 uint32_t pre_counter_val = rtc1_counter_get();
bogdanm 0:eff01767de02 693 uint32_t cc = m_ticks_latest;
bogdanm 0:eff01767de02 694 uint32_t ticks_elapsed = ticks_diff_get(pre_counter_val, cc) + RTC_COMPARE_OFFSET_MIN;
bogdanm 0:eff01767de02 695
Rohit Grover 56:a1071b629aa3 696 if (!m_rtc1_running)
bogdanm 0:eff01767de02 697 {
bogdanm 0:eff01767de02 698 // No timers were already running, start RTC
bogdanm 0:eff01767de02 699 rtc1_start();
bogdanm 0:eff01767de02 700 }
bogdanm 0:eff01767de02 701
bogdanm 0:eff01767de02 702 cc += (ticks_elapsed < ticks_to_expire) ? ticks_to_expire : ticks_elapsed;
bogdanm 0:eff01767de02 703 cc &= MAX_RTC_COUNTER_VAL;
Rohit Grover 37:c29c330d942c 704
bogdanm 0:eff01767de02 705 rtc1_compare0_set(cc);
bogdanm 0:eff01767de02 706
bogdanm 0:eff01767de02 707 uint32_t post_counter_val = rtc1_counter_get();
bogdanm 0:eff01767de02 708
Rohit Grover 56:a1071b629aa3 709 if ((ticks_diff_get(post_counter_val, pre_counter_val) + RTC_COMPARE_OFFSET_MIN) > ticks_diff_get(cc, pre_counter_val))
bogdanm 0:eff01767de02 710 {
bogdanm 0:eff01767de02 711 // When this happens the COMPARE event may not be triggered by the RTC.
bogdanm 0:eff01767de02 712 // The nRF51 Series User Specification states that if the COUNTER value is N
bogdanm 0:eff01767de02 713 // (i.e post_counter_val = N), writing N or N+1 to a CC register may not trigger a
bogdanm 0:eff01767de02 714 // COMPARE event. Hence the RTC interrupt is forcefully pended by calling the following
bogdanm 0:eff01767de02 715 // function.
bogdanm 0:eff01767de02 716 timer_timeouts_check_sched();
bogdanm 0:eff01767de02 717 }
bogdanm 0:eff01767de02 718 }
bogdanm 0:eff01767de02 719 else
bogdanm 0:eff01767de02 720 {
bogdanm 0:eff01767de02 721 // No timers are running, stop RTC
bogdanm 0:eff01767de02 722 rtc1_stop();
bogdanm 0:eff01767de02 723 }
bogdanm 0:eff01767de02 724 }
bogdanm 0:eff01767de02 725
bogdanm 0:eff01767de02 726
bogdanm 0:eff01767de02 727 /**@brief Function for handling changes to the timer list.
bogdanm 0:eff01767de02 728 */
bogdanm 0:eff01767de02 729 static void timer_list_handler(void)
bogdanm 0:eff01767de02 730 {
bogdanm 0:eff01767de02 731 app_timer_id_t restart_list_head = TIMER_NULL;
bogdanm 0:eff01767de02 732 uint32_t ticks_elapsed;
bogdanm 0:eff01767de02 733 uint32_t ticks_previous;
bogdanm 0:eff01767de02 734 bool ticks_have_elapsed;
bogdanm 0:eff01767de02 735 bool compare_update;
bogdanm 0:eff01767de02 736 app_timer_id_t timer_id_head_old;
Rohit Grover 37:c29c330d942c 737
bogdanm 0:eff01767de02 738 // Back up the previous known tick and previous list head
bogdanm 0:eff01767de02 739 ticks_previous = m_ticks_latest;
bogdanm 0:eff01767de02 740 timer_id_head_old = m_timer_id_head;
Rohit Grover 37:c29c330d942c 741
bogdanm 0:eff01767de02 742 // Get number of elapsed ticks
bogdanm 0:eff01767de02 743 ticks_have_elapsed = elapsed_ticks_acquire(&ticks_elapsed);
bogdanm 0:eff01767de02 744
bogdanm 0:eff01767de02 745 // Handle list deletions
bogdanm 0:eff01767de02 746 compare_update = list_deletions_handler();
Rohit Grover 37:c29c330d942c 747
bogdanm 0:eff01767de02 748 // Handle expired timers
bogdanm 0:eff01767de02 749 if (ticks_have_elapsed)
bogdanm 0:eff01767de02 750 {
bogdanm 0:eff01767de02 751 expired_timers_handler(ticks_elapsed, ticks_previous, &restart_list_head);
bogdanm 0:eff01767de02 752 compare_update = true;
bogdanm 0:eff01767de02 753 }
Rohit Grover 37:c29c330d942c 754
bogdanm 0:eff01767de02 755 // Handle list insertions
bogdanm 0:eff01767de02 756 if (list_insertions_handler(restart_list_head))
bogdanm 0:eff01767de02 757 {
bogdanm 0:eff01767de02 758 compare_update = true;
bogdanm 0:eff01767de02 759 }
bogdanm 0:eff01767de02 760
bogdanm 0:eff01767de02 761 // Update compare register if necessary
bogdanm 0:eff01767de02 762 if (compare_update)
bogdanm 0:eff01767de02 763 {
bogdanm 0:eff01767de02 764 compare_reg_update(timer_id_head_old);
bogdanm 0:eff01767de02 765 }
bogdanm 0:eff01767de02 766 }
bogdanm 0:eff01767de02 767
bogdanm 0:eff01767de02 768
bogdanm 0:eff01767de02 769 /**@brief Function for enqueueing a new operations queue entry.
bogdanm 0:eff01767de02 770 *
bogdanm 0:eff01767de02 771 * @param[in] p_user User that the entry is to be enqueued for.
bogdanm 0:eff01767de02 772 * @param[in] last_index Index of the next last index to be enqueued.
bogdanm 0:eff01767de02 773 */
bogdanm 0:eff01767de02 774 static void user_op_enque(timer_user_t * p_user, app_timer_id_t last_index)
bogdanm 0:eff01767de02 775 {
bogdanm 0:eff01767de02 776 p_user->last = last_index;
bogdanm 0:eff01767de02 777 }
bogdanm 0:eff01767de02 778
bogdanm 0:eff01767de02 779
bogdanm 0:eff01767de02 780 /**@brief Function for allocating a new operations queue entry.
bogdanm 0:eff01767de02 781 *
bogdanm 0:eff01767de02 782 * @param[in] p_user User that the entry is to be allocated for.
bogdanm 0:eff01767de02 783 * @param[out] p_last_index Index of the next last index to be enqueued.
bogdanm 0:eff01767de02 784 *
bogdanm 0:eff01767de02 785 * @return Pointer to allocated queue entry, or NULL if queue is full.
bogdanm 0:eff01767de02 786 */
bogdanm 0:eff01767de02 787 static timer_user_op_t * user_op_alloc(timer_user_t * p_user, app_timer_id_t * p_last_index)
Rohit Grover 37:c29c330d942c 788 {
bogdanm 0:eff01767de02 789 app_timer_id_t last;
bogdanm 0:eff01767de02 790 timer_user_op_t * p_user_op;
Rohit Grover 37:c29c330d942c 791
bogdanm 0:eff01767de02 792 last = p_user->last + 1;
bogdanm 0:eff01767de02 793 if (last == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 794 {
bogdanm 0:eff01767de02 795 // Overflow case.
bogdanm 0:eff01767de02 796 last = 0;
bogdanm 0:eff01767de02 797 }
bogdanm 0:eff01767de02 798 if (last == p_user->first)
bogdanm 0:eff01767de02 799 {
bogdanm 0:eff01767de02 800 // Queue is full.
bogdanm 0:eff01767de02 801 return NULL;
bogdanm 0:eff01767de02 802 }
Rohit Grover 37:c29c330d942c 803
Rohit Grover 37:c29c330d942c 804 *p_last_index = last;
bogdanm 0:eff01767de02 805 p_user_op = &p_user->p_user_op_queue[p_user->last];
Rohit Grover 37:c29c330d942c 806
bogdanm 0:eff01767de02 807 return p_user_op;
bogdanm 0:eff01767de02 808 }
bogdanm 0:eff01767de02 809
bogdanm 0:eff01767de02 810
bogdanm 0:eff01767de02 811 /**@brief Function for scheduling a Timer Start operation.
bogdanm 0:eff01767de02 812 *
bogdanm 0:eff01767de02 813 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 814 * @param[in] timer_id Id of timer to start.
bogdanm 0:eff01767de02 815 * @param[in] timeout_initial Time (in ticks) to first timer expiry.
bogdanm 0:eff01767de02 816 * @param[in] timeout_periodic Time (in ticks) between periodic expiries.
bogdanm 0:eff01767de02 817 * @param[in] p_context General purpose pointer. Will be passed to the timeout handler when
bogdanm 0:eff01767de02 818 * the timer expires.
bogdanm 0:eff01767de02 819 * @return NRF_SUCCESS on success, otherwise an error code.
bogdanm 0:eff01767de02 820 */
bogdanm 0:eff01767de02 821 static uint32_t timer_start_op_schedule(timer_user_id_t user_id,
bogdanm 0:eff01767de02 822 app_timer_id_t timer_id,
bogdanm 0:eff01767de02 823 uint32_t timeout_initial,
bogdanm 0:eff01767de02 824 uint32_t timeout_periodic,
bogdanm 0:eff01767de02 825 void * p_context)
bogdanm 0:eff01767de02 826 {
bogdanm 0:eff01767de02 827 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 828
bogdanm 0:eff01767de02 829 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 830 if (p_user_op == NULL)
bogdanm 0:eff01767de02 831 {
bogdanm 0:eff01767de02 832 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 833 }
Rohit Grover 37:c29c330d942c 834
bogdanm 0:eff01767de02 835 p_user_op->op_type = TIMER_USER_OP_TYPE_START;
bogdanm 0:eff01767de02 836 p_user_op->timer_id = timer_id;
bogdanm 0:eff01767de02 837 p_user_op->params.start.ticks_at_start = rtc1_counter_get();
bogdanm 0:eff01767de02 838 p_user_op->params.start.ticks_first_interval = timeout_initial;
bogdanm 0:eff01767de02 839 p_user_op->params.start.ticks_periodic_interval = timeout_periodic;
bogdanm 0:eff01767de02 840 p_user_op->params.start.p_context = p_context;
Rohit Grover 37:c29c330d942c 841
Rohit Grover 37:c29c330d942c 842 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 843
bogdanm 0:eff01767de02 844 timer_list_handler_sched();
bogdanm 0:eff01767de02 845
bogdanm 0:eff01767de02 846 return NRF_SUCCESS;
bogdanm 0:eff01767de02 847 }
bogdanm 0:eff01767de02 848
bogdanm 0:eff01767de02 849
bogdanm 0:eff01767de02 850 /**@brief Function for scheduling a Timer Stop operation.
bogdanm 0:eff01767de02 851 *
bogdanm 0:eff01767de02 852 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 853 * @param[in] timer_id Id of timer to stop.
bogdanm 0:eff01767de02 854 *
bogdanm 0:eff01767de02 855 * @return NRF_SUCCESS on successful scheduling a timer stop operation. NRF_ERROR_NO_MEM when there
bogdanm 0:eff01767de02 856 * is no memory left to schedule the timer stop operation.
bogdanm 0:eff01767de02 857 */
bogdanm 0:eff01767de02 858 static uint32_t timer_stop_op_schedule(timer_user_id_t user_id, app_timer_id_t timer_id)
bogdanm 0:eff01767de02 859 {
bogdanm 0:eff01767de02 860 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 861
bogdanm 0:eff01767de02 862 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 863 if (p_user_op == NULL)
bogdanm 0:eff01767de02 864 {
bogdanm 0:eff01767de02 865 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 866 }
Rohit Grover 37:c29c330d942c 867
bogdanm 0:eff01767de02 868 p_user_op->op_type = TIMER_USER_OP_TYPE_STOP;
bogdanm 0:eff01767de02 869 p_user_op->timer_id = timer_id;
Rohit Grover 37:c29c330d942c 870
Rohit Grover 37:c29c330d942c 871 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 872
bogdanm 0:eff01767de02 873 timer_list_handler_sched();
bogdanm 0:eff01767de02 874
bogdanm 0:eff01767de02 875 return NRF_SUCCESS;
bogdanm 0:eff01767de02 876 }
bogdanm 0:eff01767de02 877
bogdanm 0:eff01767de02 878
bogdanm 0:eff01767de02 879 /**@brief Function for scheduling a Timer Stop All operation.
bogdanm 0:eff01767de02 880 *
bogdanm 0:eff01767de02 881 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 882 */
bogdanm 0:eff01767de02 883 static uint32_t timer_stop_all_op_schedule(timer_user_id_t user_id)
bogdanm 0:eff01767de02 884 {
bogdanm 0:eff01767de02 885 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 886
bogdanm 0:eff01767de02 887 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 888 if (p_user_op == NULL)
bogdanm 0:eff01767de02 889 {
bogdanm 0:eff01767de02 890 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 891 }
Rohit Grover 37:c29c330d942c 892
bogdanm 0:eff01767de02 893 p_user_op->op_type = TIMER_USER_OP_TYPE_STOP_ALL;
bogdanm 0:eff01767de02 894 p_user_op->timer_id = TIMER_NULL;
Rohit Grover 37:c29c330d942c 895
Rohit Grover 37:c29c330d942c 896 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 897
bogdanm 0:eff01767de02 898 timer_list_handler_sched();
bogdanm 0:eff01767de02 899
bogdanm 0:eff01767de02 900 return NRF_SUCCESS;
bogdanm 0:eff01767de02 901 }
bogdanm 0:eff01767de02 902
bogdanm 0:eff01767de02 903
bogdanm 0:eff01767de02 904 /**@brief Function for handling the RTC1 interrupt.
bogdanm 0:eff01767de02 905 *
bogdanm 0:eff01767de02 906 * @details Checks for timeouts, and executes timeout handlers for expired timers.
bogdanm 0:eff01767de02 907 */
bogdanm 0:eff01767de02 908 extern "C" void RTC1_IRQHandler(void)
bogdanm 0:eff01767de02 909 {
bogdanm 0:eff01767de02 910 // Clear all events (also unexpected ones)
bogdanm 0:eff01767de02 911 NRF_RTC1->EVENTS_COMPARE[0] = 0;
bogdanm 0:eff01767de02 912 NRF_RTC1->EVENTS_COMPARE[1] = 0;
bogdanm 0:eff01767de02 913 NRF_RTC1->EVENTS_COMPARE[2] = 0;
bogdanm 0:eff01767de02 914 NRF_RTC1->EVENTS_COMPARE[3] = 0;
bogdanm 0:eff01767de02 915 NRF_RTC1->EVENTS_TICK = 0;
Rohit Grover 56:a1071b629aa3 916 if (NRF_RTC1->EVENTS_OVRFLW) {
Rohit Grover 56:a1071b629aa3 917 overflowBits += (1 << 24);
Rohit Grover 56:a1071b629aa3 918 }
bogdanm 0:eff01767de02 919 NRF_RTC1->EVENTS_OVRFLW = 0;
bogdanm 0:eff01767de02 920
bogdanm 0:eff01767de02 921 // Check for expired timers
bogdanm 0:eff01767de02 922 timer_timeouts_check();
bogdanm 0:eff01767de02 923 }
bogdanm 0:eff01767de02 924
bogdanm 0:eff01767de02 925 /**@brief Function for handling the SWI0 interrupt.
bogdanm 0:eff01767de02 926 *
bogdanm 0:eff01767de02 927 * @details Performs all updates to the timer list.
bogdanm 0:eff01767de02 928 */
bogdanm 0:eff01767de02 929 extern "C" void SWI0_IRQHandler(void)
bogdanm 0:eff01767de02 930 {
bogdanm 0:eff01767de02 931 timer_list_handler();
bogdanm 0:eff01767de02 932 }
bogdanm 0:eff01767de02 933
bogdanm 0:eff01767de02 934 uint32_t app_timer_init(uint32_t prescaler,
bogdanm 0:eff01767de02 935 uint8_t max_timers,
bogdanm 0:eff01767de02 936 uint8_t op_queues_size,
bogdanm 0:eff01767de02 937 void * p_buffer,
bogdanm 0:eff01767de02 938 app_timer_evt_schedule_func_t evt_schedule_func)
bogdanm 0:eff01767de02 939 {
bogdanm 0:eff01767de02 940 int i;
bogdanm 0:eff01767de02 941
bogdanm 0:eff01767de02 942 // Check that buffer is correctly aligned
bogdanm 0:eff01767de02 943 if (!is_word_aligned(p_buffer))
bogdanm 0:eff01767de02 944 {
bogdanm 0:eff01767de02 945 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 946 }
bogdanm 0:eff01767de02 947 // Check for NULL buffer
bogdanm 0:eff01767de02 948 if (p_buffer == NULL)
bogdanm 0:eff01767de02 949 {
bogdanm 0:eff01767de02 950 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 951 }
Rohit Grover 37:c29c330d942c 952
bogdanm 0:eff01767de02 953 // Stop RTC to prevent any running timers from expiring (in case of reinitialization)
bogdanm 0:eff01767de02 954 rtc1_stop();
Rohit Grover 37:c29c330d942c 955
bogdanm 0:eff01767de02 956 m_evt_schedule_func = evt_schedule_func;
bogdanm 0:eff01767de02 957
bogdanm 0:eff01767de02 958 // Initialize timer node array
bogdanm 0:eff01767de02 959 m_node_array_size = max_timers;
bogdanm 0:eff01767de02 960 mp_nodes = (timer_node_t *) p_buffer;
Rohit Grover 37:c29c330d942c 961
bogdanm 0:eff01767de02 962 for (i = 0; i < max_timers; i++)
bogdanm 0:eff01767de02 963 {
bogdanm 0:eff01767de02 964 mp_nodes[i].state = STATE_FREE;
bogdanm 0:eff01767de02 965 mp_nodes[i].is_running = false;
bogdanm 0:eff01767de02 966 }
Rohit Grover 37:c29c330d942c 967
bogdanm 0:eff01767de02 968 // Skip timer node array
bogdanm 0:eff01767de02 969 p_buffer = &((uint8_t *)p_buffer)[max_timers * sizeof(timer_node_t)];
Rohit Grover 37:c29c330d942c 970
bogdanm 0:eff01767de02 971 // Initialize users array
bogdanm 0:eff01767de02 972 m_user_array_size = APP_TIMER_INT_LEVELS;
bogdanm 0:eff01767de02 973 mp_users = (timer_user_t *) p_buffer;
Rohit Grover 37:c29c330d942c 974
bogdanm 0:eff01767de02 975 // Skip user array
bogdanm 0:eff01767de02 976 p_buffer = &((uint8_t *)p_buffer)[APP_TIMER_INT_LEVELS * sizeof(timer_user_t)];
bogdanm 0:eff01767de02 977
bogdanm 0:eff01767de02 978 // Initialize operation queues
bogdanm 0:eff01767de02 979 for (i = 0; i < APP_TIMER_INT_LEVELS; i++)
bogdanm 0:eff01767de02 980 {
bogdanm 0:eff01767de02 981 timer_user_t * p_user = &mp_users[i];
Rohit Grover 37:c29c330d942c 982
bogdanm 0:eff01767de02 983 p_user->first = 0;
bogdanm 0:eff01767de02 984 p_user->last = 0;
bogdanm 0:eff01767de02 985 p_user->user_op_queue_size = op_queues_size;
bogdanm 0:eff01767de02 986 p_user->p_user_op_queue = (timer_user_op_t *) p_buffer;
Rohit Grover 37:c29c330d942c 987
bogdanm 0:eff01767de02 988 // Skip operation queue
bogdanm 0:eff01767de02 989 p_buffer = &((uint8_t *)p_buffer)[op_queues_size * sizeof(timer_user_op_t)];
bogdanm 0:eff01767de02 990 }
bogdanm 0:eff01767de02 991
bogdanm 0:eff01767de02 992 m_timer_id_head = TIMER_NULL;
bogdanm 0:eff01767de02 993 m_ticks_elapsed_q_read_ind = 0;
bogdanm 0:eff01767de02 994 m_ticks_elapsed_q_write_ind = 0;
bogdanm 0:eff01767de02 995
bogdanm 0:eff01767de02 996 NVIC_ClearPendingIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 997 NVIC_SetPriority(SWI0_IRQn, SWI0_IRQ_PRI);
bogdanm 0:eff01767de02 998 NVIC_EnableIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 999
bogdanm 0:eff01767de02 1000 rtc1_init(prescaler);
Rohit Grover 56:a1071b629aa3 1001 rtc1_start();
bogdanm 0:eff01767de02 1002
bogdanm 0:eff01767de02 1003 m_ticks_latest = rtc1_counter_get();
Rohit Grover 37:c29c330d942c 1004
bogdanm 0:eff01767de02 1005 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1006 }
bogdanm 0:eff01767de02 1007
bogdanm 0:eff01767de02 1008
bogdanm 0:eff01767de02 1009 uint32_t app_timer_create(app_timer_id_t * p_timer_id,
bogdanm 0:eff01767de02 1010 app_timer_mode_t mode,
bogdanm 0:eff01767de02 1011 app_timer_timeout_handler_t timeout_handler)
bogdanm 0:eff01767de02 1012 {
bogdanm 0:eff01767de02 1013 int i;
bogdanm 0:eff01767de02 1014
bogdanm 0:eff01767de02 1015 // Check state and parameters
bogdanm 0:eff01767de02 1016 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1017 {
bogdanm 0:eff01767de02 1018 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1019 }
bogdanm 0:eff01767de02 1020 if (timeout_handler == NULL)
bogdanm 0:eff01767de02 1021 {
bogdanm 0:eff01767de02 1022 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1023 }
bogdanm 0:eff01767de02 1024 if (p_timer_id == NULL)
bogdanm 0:eff01767de02 1025 {
bogdanm 0:eff01767de02 1026 return NRF_ERROR_INVALID_PARAM;
Rohit Grover 37:c29c330d942c 1027 }
Rohit Grover 37:c29c330d942c 1028
bogdanm 0:eff01767de02 1029 // Find free timer
bogdanm 0:eff01767de02 1030 for (i = 0; i < m_node_array_size; i++)
bogdanm 0:eff01767de02 1031 {
bogdanm 0:eff01767de02 1032 if (mp_nodes[i].state == STATE_FREE)
bogdanm 0:eff01767de02 1033 {
bogdanm 0:eff01767de02 1034 mp_nodes[i].state = STATE_ALLOCATED;
bogdanm 0:eff01767de02 1035 mp_nodes[i].mode = mode;
bogdanm 0:eff01767de02 1036 mp_nodes[i].p_timeout_handler = timeout_handler;
Rohit Grover 37:c29c330d942c 1037
bogdanm 0:eff01767de02 1038 *p_timer_id = i;
bogdanm 0:eff01767de02 1039 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1040 }
bogdanm 0:eff01767de02 1041 }
Rohit Grover 37:c29c330d942c 1042
bogdanm 0:eff01767de02 1043 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 1044 }
bogdanm 0:eff01767de02 1045
bogdanm 0:eff01767de02 1046
bogdanm 0:eff01767de02 1047 /**@brief Function for creating a timer user id from the current interrupt level.
bogdanm 0:eff01767de02 1048 *
bogdanm 0:eff01767de02 1049 * @return Timer user id.
bogdanm 0:eff01767de02 1050 */
bogdanm 0:eff01767de02 1051 static timer_user_id_t user_id_get(void)
bogdanm 0:eff01767de02 1052 {
bogdanm 0:eff01767de02 1053 timer_user_id_t ret;
bogdanm 0:eff01767de02 1054
bogdanm 0:eff01767de02 1055 STATIC_ASSERT(APP_TIMER_INT_LEVELS == 3);
Rohit Grover 37:c29c330d942c 1056
bogdanm 0:eff01767de02 1057 switch (current_int_priority_get())
bogdanm 0:eff01767de02 1058 {
bogdanm 0:eff01767de02 1059 case APP_IRQ_PRIORITY_HIGH:
bogdanm 0:eff01767de02 1060 ret = APP_HIGH_USER_ID;
bogdanm 0:eff01767de02 1061 break;
Rohit Grover 37:c29c330d942c 1062
bogdanm 0:eff01767de02 1063 case APP_IRQ_PRIORITY_LOW:
bogdanm 0:eff01767de02 1064 ret = APP_LOW_USER_ID;
bogdanm 0:eff01767de02 1065 break;
Rohit Grover 37:c29c330d942c 1066
bogdanm 0:eff01767de02 1067 default:
bogdanm 0:eff01767de02 1068 ret = THREAD_MODE_USER_ID;
bogdanm 0:eff01767de02 1069 break;
bogdanm 0:eff01767de02 1070 }
Rohit Grover 37:c29c330d942c 1071
bogdanm 0:eff01767de02 1072 return ret;
bogdanm 0:eff01767de02 1073 }
bogdanm 0:eff01767de02 1074
bogdanm 0:eff01767de02 1075
bogdanm 0:eff01767de02 1076 uint32_t app_timer_start(app_timer_id_t timer_id, uint32_t timeout_ticks, void * p_context)
bogdanm 0:eff01767de02 1077 {
bogdanm 0:eff01767de02 1078 uint32_t timeout_periodic;
Rohit Grover 37:c29c330d942c 1079
bogdanm 0:eff01767de02 1080 // Check state and parameters
bogdanm 0:eff01767de02 1081 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1082 {
bogdanm 0:eff01767de02 1083 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1084 }
bogdanm 0:eff01767de02 1085 if ((timer_id >= m_node_array_size) || (timeout_ticks < APP_TIMER_MIN_TIMEOUT_TICKS))
bogdanm 0:eff01767de02 1086 {
bogdanm 0:eff01767de02 1087 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1088 }
bogdanm 0:eff01767de02 1089 if (mp_nodes[timer_id].state != STATE_ALLOCATED)
bogdanm 0:eff01767de02 1090 {
bogdanm 0:eff01767de02 1091 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1092 }
Rohit Grover 37:c29c330d942c 1093
bogdanm 0:eff01767de02 1094 // Schedule timer start operation
bogdanm 0:eff01767de02 1095 timeout_periodic = (mp_nodes[timer_id].mode == APP_TIMER_MODE_REPEATED) ? timeout_ticks : 0;
bogdanm 0:eff01767de02 1096
bogdanm 0:eff01767de02 1097 return timer_start_op_schedule(user_id_get(),
bogdanm 0:eff01767de02 1098 timer_id,
bogdanm 0:eff01767de02 1099 timeout_ticks,
bogdanm 0:eff01767de02 1100 timeout_periodic,
bogdanm 0:eff01767de02 1101 p_context);
bogdanm 0:eff01767de02 1102 }
bogdanm 0:eff01767de02 1103
bogdanm 0:eff01767de02 1104
bogdanm 0:eff01767de02 1105 uint32_t app_timer_stop(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 1106 {
bogdanm 0:eff01767de02 1107 // Check state and parameters
bogdanm 0:eff01767de02 1108 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1109 {
bogdanm 0:eff01767de02 1110 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1111 }
bogdanm 0:eff01767de02 1112 if (timer_id >= m_node_array_size)
bogdanm 0:eff01767de02 1113 {
bogdanm 0:eff01767de02 1114 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1115 }
bogdanm 0:eff01767de02 1116 if (mp_nodes[timer_id].state != STATE_ALLOCATED)
bogdanm 0:eff01767de02 1117 {
bogdanm 0:eff01767de02 1118 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1119 }
Rohit Grover 37:c29c330d942c 1120
bogdanm 0:eff01767de02 1121 // Schedule timer stop operation
bogdanm 0:eff01767de02 1122 return timer_stop_op_schedule(user_id_get(), timer_id);
bogdanm 0:eff01767de02 1123 }
bogdanm 0:eff01767de02 1124
bogdanm 0:eff01767de02 1125
bogdanm 0:eff01767de02 1126 uint32_t app_timer_stop_all(void)
bogdanm 0:eff01767de02 1127 {
bogdanm 0:eff01767de02 1128 // Check state
bogdanm 0:eff01767de02 1129 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1130 {
bogdanm 0:eff01767de02 1131 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1132 }
bogdanm 0:eff01767de02 1133
bogdanm 0:eff01767de02 1134 return timer_stop_all_op_schedule(user_id_get());
bogdanm 0:eff01767de02 1135 }
bogdanm 0:eff01767de02 1136
bogdanm 0:eff01767de02 1137
Rohit Grover 56:a1071b629aa3 1138 uint32_t app_timer_cnt_get(uint64_t * p_ticks)
bogdanm 0:eff01767de02 1139 {
Rohit Grover 56:a1071b629aa3 1140 *p_ticks = overflowBits | rtc1_counter_get();
bogdanm 0:eff01767de02 1141 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1142 }
bogdanm 0:eff01767de02 1143
bogdanm 0:eff01767de02 1144
bogdanm 0:eff01767de02 1145 uint32_t app_timer_cnt_diff_compute(uint32_t ticks_to,
bogdanm 0:eff01767de02 1146 uint32_t ticks_from,
bogdanm 0:eff01767de02 1147 uint32_t * p_ticks_diff)
bogdanm 0:eff01767de02 1148 {
bogdanm 0:eff01767de02 1149 *p_ticks_diff = ticks_diff_get(ticks_to, ticks_from);
bogdanm 0:eff01767de02 1150 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1151 }