Ken Todotani / nRF51822

Nordic stack and drivers for the mbed BLE API

Dependents:   BLE_Health_Thermometer2

Fork of nRF51822 by Nordic Semiconductor

nordic/app_common/app_timer.cpp@54:f3badab88f02, 2014-08-22 (annotated)

Committer:
todotani
Date:
Fri Aug 22 11:24:48 2014 +0000
Revision:
54:f3badab88f02
Parent:
37:c29c330d942c 
BLE_Health_Thermometer for mbed HRM1017 with new BLE library

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"
bogdanm 0:eff01767de02 19 //#include "nrf_delay.h"
bogdanm 0:eff01767de02 20 #include "mbed.h"
bogdanm 0:eff01767de02 21 #include "app_util.h"
Rohit Grover 37:c29c330d942c 22 #include "app_util_platform.h"
bogdanm 0:eff01767de02 23
bogdanm 0:eff01767de02 24
bogdanm 0:eff01767de02 25 #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 26 #define SWI0_IRQ_PRI APP_IRQ_PRIORITY_LOW /**< Priority of the SWI0 interrupt (used for updating the timer list). */
bogdanm 0:eff01767de02 27
bogdanm 0:eff01767de02 28 // The current design assumes that both interrupt handlers run at the same interrupt level.
bogdanm 0:eff01767de02 29 // If this is to be changed, protection must be added to prevent them from interrupting each other
bogdanm 0:eff01767de02 30 // (e.g. by using guard/trigger flags).
bogdanm 0:eff01767de02 31 STATIC_ASSERT(RTC1_IRQ_PRI == SWI0_IRQ_PRI);
bogdanm 0:eff01767de02 32
bogdanm 0:eff01767de02 33 #define MAX_RTC_COUNTER_VAL 0x00FFFFFF /**< Maximum value of the RTC counter. */
bogdanm 0:eff01767de02 34
bogdanm 0:eff01767de02 35 #define APP_HIGH_USER_ID 0 /**< User Id for the Application High "user". */
bogdanm 0:eff01767de02 36 #define APP_LOW_USER_ID 1 /**< User Id for the Application Low "user". */
bogdanm 0:eff01767de02 37 #define THREAD_MODE_USER_ID 2 /**< User Id for the Thread Mode "user". */
bogdanm 0:eff01767de02 38
bogdanm 0:eff01767de02 39 #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 40
bogdanm 0:eff01767de02 41 #define MAX_RTC_TASKS_DELAY 47 /**< Maximum delay until an RTC task is executed. */
bogdanm 0:eff01767de02 42
bogdanm 0:eff01767de02 43 /**@brief Timer allocation state type. */
bogdanm 0:eff01767de02 44 typedef enum
bogdanm 0:eff01767de02 45 {
bogdanm 0:eff01767de02 46 STATE_FREE, /**< The timer node is available. */
bogdanm 0:eff01767de02 47 STATE_ALLOCATED /**< The timer node has been allocated. */
bogdanm 0:eff01767de02 48 } timer_alloc_state_t;
bogdanm 0:eff01767de02 49
bogdanm 0:eff01767de02 50 /**@brief Timer node type. The nodes will be used form a linked list of running timers. */
bogdanm 0:eff01767de02 51 typedef struct
bogdanm 0:eff01767de02 52 {
bogdanm 0:eff01767de02 53 timer_alloc_state_t state; /**< Timer allocation state. */
bogdanm 0:eff01767de02 54 app_timer_mode_t mode; /**< Timer mode. */
bogdanm 0:eff01767de02 55 uint32_t ticks_to_expire; /**< Number of ticks from previous timer interrupt to timer expiry. */
bogdanm 0:eff01767de02 56 uint32_t ticks_at_start; /**< Current RTC counter value when the timer was started. */
bogdanm 0:eff01767de02 57 uint32_t ticks_first_interval; /**< Number of ticks in the first timer interval. */
bogdanm 0:eff01767de02 58 uint32_t ticks_periodic_interval; /**< Timer period (for repeating timers). */
bogdanm 0:eff01767de02 59 bool is_running; /**< True if timer is running, False otherwise. */
bogdanm 0:eff01767de02 60 app_timer_timeout_handler_t p_timeout_handler; /**< Pointer to function to be executed when the timer expires. */
bogdanm 0:eff01767de02 61 void * p_context; /**< General purpose pointer. Will be passed to the timeout handler when the timer expires. */
bogdanm 0:eff01767de02 62 app_timer_id_t next; /**< Id of next timer in list of running timers. */
bogdanm 0:eff01767de02 63 } timer_node_t;
bogdanm 0:eff01767de02 64
bogdanm 0:eff01767de02 65 STATIC_ASSERT(sizeof(timer_node_t) <= APP_TIMER_NODE_SIZE);
bogdanm 0:eff01767de02 66 STATIC_ASSERT(sizeof(timer_node_t) % 4 == 0);
bogdanm 0:eff01767de02 67
bogdanm 0:eff01767de02 68 /**@brief Set of available timer operation types. */
bogdanm 0:eff01767de02 69 typedef enum
bogdanm 0:eff01767de02 70 {
bogdanm 0:eff01767de02 71 TIMER_USER_OP_TYPE_NONE, /**< Invalid timer operation type. */
bogdanm 0:eff01767de02 72 TIMER_USER_OP_TYPE_START, /**< Timer operation type Start. */
bogdanm 0:eff01767de02 73 TIMER_USER_OP_TYPE_STOP, /**< Timer operation type Stop. */
bogdanm 0:eff01767de02 74 TIMER_USER_OP_TYPE_STOP_ALL /**< Timer operation type Stop All. */
bogdanm 0:eff01767de02 75 } timer_user_op_type_t;
bogdanm 0:eff01767de02 76
bogdanm 0:eff01767de02 77 /**@brief Structure describing a timer start operation. */
bogdanm 0:eff01767de02 78 typedef struct
bogdanm 0:eff01767de02 79 {
bogdanm 0:eff01767de02 80 uint32_t ticks_at_start; /**< Current RTC counter value when the timer was started. */
bogdanm 0:eff01767de02 81 uint32_t ticks_first_interval; /**< Number of ticks in the first timer interval. */
bogdanm 0:eff01767de02 82 uint32_t ticks_periodic_interval; /**< Timer period (for repeating timers). */
bogdanm 0:eff01767de02 83 void * p_context; /**< General purpose pointer. Will be passed to the timeout handler when the timer expires. */
bogdanm 0:eff01767de02 84 } timer_user_op_start_t;
bogdanm 0:eff01767de02 85
bogdanm 0:eff01767de02 86 /**@brief Structure describing a timer operation. */
bogdanm 0:eff01767de02 87 typedef struct
bogdanm 0:eff01767de02 88 {
bogdanm 0:eff01767de02 89 timer_user_op_type_t op_type; /**< Timer operation type. */
bogdanm 0:eff01767de02 90 app_timer_id_t timer_id; /**< Id of timer on which the operation is to be performed. */
bogdanm 0:eff01767de02 91 union
bogdanm 0:eff01767de02 92 {
bogdanm 0:eff01767de02 93 timer_user_op_start_t start; /**< Structure describing a timer start operation. */
bogdanm 0:eff01767de02 94 } params;
bogdanm 0:eff01767de02 95 } timer_user_op_t;
bogdanm 0:eff01767de02 96
bogdanm 0:eff01767de02 97 STATIC_ASSERT(sizeof(timer_user_op_t) <= APP_TIMER_USER_OP_SIZE);
bogdanm 0:eff01767de02 98 STATIC_ASSERT(sizeof(timer_user_op_t) % 4 == 0);
bogdanm 0:eff01767de02 99
bogdanm 0:eff01767de02 100 /**@brief Structure describing a timer user.
bogdanm 0:eff01767de02 101 *
bogdanm 0:eff01767de02 102 * @details For each user of the timer module, there will be a timer operations queue. This queue
bogdanm 0:eff01767de02 103 * will hold timer operations issued by this user until the timer interrupt handler
bogdanm 0:eff01767de02 104 * processes these operations. For the current implementation, there will be one user for
bogdanm 0:eff01767de02 105 * each interrupt level available to the application (APP_HIGH, APP_LOW and THREAD_MODE),
bogdanm 0:eff01767de02 106 * but the module can easily be modified to e.g. have one queue per process when using an
bogdanm 0:eff01767de02 107 * RTOS. The purpose of the queues is to be able to have a completely lockless timer
bogdanm 0:eff01767de02 108 * implementation.
bogdanm 0:eff01767de02 109 */
bogdanm 0:eff01767de02 110 typedef struct
bogdanm 0:eff01767de02 111 {
bogdanm 0:eff01767de02 112 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 113 uint8_t last; /**< Index of last entry to have been inserted in the queue. */
bogdanm 0:eff01767de02 114 uint8_t user_op_queue_size; /**< Queue size. */
bogdanm 0:eff01767de02 115 timer_user_op_t * p_user_op_queue; /**< Queue buffer. */
bogdanm 0:eff01767de02 116 } timer_user_t;
bogdanm 0:eff01767de02 117
bogdanm 0:eff01767de02 118 STATIC_ASSERT(sizeof(timer_user_t) == APP_TIMER_USER_SIZE);
bogdanm 0:eff01767de02 119 STATIC_ASSERT(sizeof(timer_user_t) % 4 == 0);
bogdanm 0:eff01767de02 120
bogdanm 0:eff01767de02 121 /**@brief User id type.
bogdanm 0:eff01767de02 122 *
bogdanm 0:eff01767de02 123 * @details In the current implementation, this will automatically be generated from the current
bogdanm 0:eff01767de02 124 * interrupt level.
bogdanm 0:eff01767de02 125 */
bogdanm 0:eff01767de02 126 typedef uint32_t timer_user_id_t;
bogdanm 0:eff01767de02 127
bogdanm 0:eff01767de02 128 #define TIMER_NULL ((app_timer_id_t)(0 - 1)) /**< Invalid timer id. */
bogdanm 0:eff01767de02 129 #define CONTEXT_QUEUE_SIZE_MAX (2) /**< Timer internal elapsed ticks queue size. */
bogdanm 0:eff01767de02 130
bogdanm 0:eff01767de02 131 static uint8_t m_node_array_size; /**< Size of timer node array. */
bogdanm 0:eff01767de02 132 static timer_node_t * mp_nodes = NULL; /**< Array of timer nodes. */
bogdanm 0:eff01767de02 133 static uint8_t m_user_array_size; /**< Size of timer user array. */
bogdanm 0:eff01767de02 134 static timer_user_t * mp_users; /**< Array of timer users. */
bogdanm 0:eff01767de02 135 static app_timer_id_t m_timer_id_head; /**< First timer in list of running timers. */
bogdanm 0:eff01767de02 136 static uint32_t m_ticks_latest; /**< Last known RTC counter value. */
bogdanm 0:eff01767de02 137 static uint32_t m_ticks_elapsed[CONTEXT_QUEUE_SIZE_MAX]; /**< Timer internal elapsed ticks queue. */
bogdanm 0:eff01767de02 138 static uint8_t m_ticks_elapsed_q_read_ind; /**< Timer internal elapsed ticks queue read index. */
bogdanm 0:eff01767de02 139 static uint8_t m_ticks_elapsed_q_write_ind; /**< Timer internal elapsed ticks queue write index. */
bogdanm 0:eff01767de02 140 static app_timer_evt_schedule_func_t m_evt_schedule_func; /**< Pointer to function for propagating timeout events to the scheduler. */
bogdanm 0:eff01767de02 141
bogdanm 0:eff01767de02 142
bogdanm 0:eff01767de02 143 /**@brief Function for initializing the RTC1 counter.
bogdanm 0:eff01767de02 144 *
bogdanm 0:eff01767de02 145 * @param[in] prescaler Value of the RTC1 PRESCALER register. Set to 0 for no prescaling.
bogdanm 0:eff01767de02 146 */
bogdanm 0:eff01767de02 147 static void rtc1_init(uint32_t prescaler)
bogdanm 0:eff01767de02 148 {
bogdanm 0:eff01767de02 149 NRF_RTC1->PRESCALER = prescaler;
bogdanm 0:eff01767de02 150 NVIC_SetPriority(RTC1_IRQn, RTC1_IRQ_PRI);
bogdanm 0:eff01767de02 151 }
bogdanm 0:eff01767de02 152
bogdanm 0:eff01767de02 153
bogdanm 0:eff01767de02 154 /**@brief Function for starting the RTC1 timer.
bogdanm 0:eff01767de02 155 */
bogdanm 0:eff01767de02 156 static void rtc1_start(void)
bogdanm 0:eff01767de02 157 {
bogdanm 0:eff01767de02 158 NRF_RTC1->EVTENSET = RTC_EVTEN_COMPARE0_Msk;
bogdanm 0:eff01767de02 159 NRF_RTC1->INTENSET = RTC_INTENSET_COMPARE0_Msk;
bogdanm 0:eff01767de02 160
bogdanm 0:eff01767de02 161 NVIC_ClearPendingIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 162 NVIC_EnableIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 163
bogdanm 0:eff01767de02 164 NRF_RTC1->TASKS_START = 1;
bogdanm 0:eff01767de02 165 wait(0.0000001 * MAX_RTC_TASKS_DELAY);
bogdanm 0:eff01767de02 166 }
bogdanm 0:eff01767de02 167
bogdanm 0:eff01767de02 168
bogdanm 0:eff01767de02 169 /**@brief Function for stopping the RTC1 timer.
bogdanm 0:eff01767de02 170 */
bogdanm 0:eff01767de02 171 static void rtc1_stop(void)
bogdanm 0:eff01767de02 172 {
bogdanm 0:eff01767de02 173 NVIC_DisableIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 174
bogdanm 0:eff01767de02 175 NRF_RTC1->EVTENCLR = RTC_EVTEN_COMPARE0_Msk;
bogdanm 0:eff01767de02 176 NRF_RTC1->INTENCLR = RTC_INTENSET_COMPARE0_Msk;
bogdanm 0:eff01767de02 177
bogdanm 0:eff01767de02 178 NRF_RTC1->TASKS_STOP = 1;
bogdanm 0:eff01767de02 179 wait(0.0000001 * MAX_RTC_TASKS_DELAY);
bogdanm 0:eff01767de02 180 }
bogdanm 0:eff01767de02 181
bogdanm 0:eff01767de02 182
bogdanm 0:eff01767de02 183 /**@brief Function for returning the current value of the RTC1 counter.
bogdanm 0:eff01767de02 184 *
bogdanm 0:eff01767de02 185 * @return Current value of the RTC1 counter.
bogdanm 0:eff01767de02 186 */
bogdanm 0:eff01767de02 187 static __INLINE uint32_t rtc1_counter_get(void)
bogdanm 0:eff01767de02 188 {
bogdanm 0:eff01767de02 189 return NRF_RTC1->COUNTER;
bogdanm 0:eff01767de02 190 }
bogdanm 0:eff01767de02 191
bogdanm 0:eff01767de02 192
bogdanm 0:eff01767de02 193 /**@brief Function for computing the difference between two RTC1 counter values.
bogdanm 0:eff01767de02 194 *
bogdanm 0:eff01767de02 195 * @return Number of ticks elapsed from ticks_old to ticks_now.
bogdanm 0:eff01767de02 196 */
bogdanm 0:eff01767de02 197 static __INLINE uint32_t ticks_diff_get(uint32_t ticks_now, uint32_t ticks_old)
bogdanm 0:eff01767de02 198 {
bogdanm 0:eff01767de02 199 return ((ticks_now - ticks_old) & MAX_RTC_COUNTER_VAL);
bogdanm 0:eff01767de02 200 }
bogdanm 0:eff01767de02 201
bogdanm 0:eff01767de02 202
bogdanm 0:eff01767de02 203 /**@brief Function for setting the RTC1 Capture Compare register 0, and enabling the corresponding
bogdanm 0:eff01767de02 204 * event.
bogdanm 0:eff01767de02 205 *
bogdanm 0:eff01767de02 206 * @param[in] value New value of Capture Compare register 0.
bogdanm 0:eff01767de02 207 */
bogdanm 0:eff01767de02 208 static __INLINE void rtc1_compare0_set(uint32_t value)
bogdanm 0:eff01767de02 209 {
bogdanm 0:eff01767de02 210 NRF_RTC1->CC[0] = value;
bogdanm 0:eff01767de02 211 }
bogdanm 0:eff01767de02 212
bogdanm 0:eff01767de02 213
bogdanm 0:eff01767de02 214 /**@brief Function for inserting a timer in the timer list.
bogdanm 0:eff01767de02 215 *
bogdanm 0:eff01767de02 216 * @param[in] timer_id Id of timer to insert.
bogdanm 0:eff01767de02 217 */
bogdanm 0:eff01767de02 218 static void timer_list_insert(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 219 {
bogdanm 0:eff01767de02 220 timer_node_t * p_timer = &mp_nodes[timer_id];
Rohit Grover 37:c29c330d942c 221
bogdanm 0:eff01767de02 222 if (m_timer_id_head == TIMER_NULL)
bogdanm 0:eff01767de02 223 {
bogdanm 0:eff01767de02 224 m_timer_id_head = timer_id;
bogdanm 0:eff01767de02 225 }
bogdanm 0:eff01767de02 226 else
bogdanm 0:eff01767de02 227 {
bogdanm 0:eff01767de02 228 if (p_timer->ticks_to_expire <= mp_nodes[m_timer_id_head].ticks_to_expire)
bogdanm 0:eff01767de02 229 {
bogdanm 0:eff01767de02 230 mp_nodes[m_timer_id_head].ticks_to_expire -= p_timer->ticks_to_expire;
Rohit Grover 37:c29c330d942c 231
bogdanm 0:eff01767de02 232 p_timer->next = m_timer_id_head;
bogdanm 0:eff01767de02 233 m_timer_id_head = timer_id;
bogdanm 0:eff01767de02 234 }
bogdanm 0:eff01767de02 235 else
bogdanm 0:eff01767de02 236 {
bogdanm 0:eff01767de02 237 app_timer_id_t previous;
bogdanm 0:eff01767de02 238 app_timer_id_t current;
bogdanm 0:eff01767de02 239 uint32_t ticks_to_expire;
bogdanm 0:eff01767de02 240
bogdanm 0:eff01767de02 241 ticks_to_expire = p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 242 previous = m_timer_id_head;
bogdanm 0:eff01767de02 243 current = m_timer_id_head;
Rohit Grover 37:c29c330d942c 244
bogdanm 0:eff01767de02 245 while ((current != TIMER_NULL) && (ticks_to_expire > mp_nodes[current].ticks_to_expire))
bogdanm 0:eff01767de02 246 {
bogdanm 0:eff01767de02 247 ticks_to_expire -= mp_nodes[current].ticks_to_expire;
bogdanm 0:eff01767de02 248 previous = current;
bogdanm 0:eff01767de02 249 current = mp_nodes[current].next;
bogdanm 0:eff01767de02 250 }
bogdanm 0:eff01767de02 251
bogdanm 0:eff01767de02 252 if (current != TIMER_NULL)
bogdanm 0:eff01767de02 253 {
bogdanm 0:eff01767de02 254 mp_nodes[current].ticks_to_expire -= ticks_to_expire;
bogdanm 0:eff01767de02 255 }
bogdanm 0:eff01767de02 256
bogdanm 0:eff01767de02 257 p_timer->ticks_to_expire = ticks_to_expire;
bogdanm 0:eff01767de02 258 p_timer->next = current;
bogdanm 0:eff01767de02 259 mp_nodes[previous].next = timer_id;
bogdanm 0:eff01767de02 260 }
bogdanm 0:eff01767de02 261 }
bogdanm 0:eff01767de02 262 }
bogdanm 0:eff01767de02 263
bogdanm 0:eff01767de02 264
bogdanm 0:eff01767de02 265 /**@brief Function for removing a timer from the timer queue.
bogdanm 0:eff01767de02 266 *
bogdanm 0:eff01767de02 267 * @param[in] timer_id Id of timer to remove.
bogdanm 0:eff01767de02 268 */
bogdanm 0:eff01767de02 269 static void timer_list_remove(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 270 {
bogdanm 0:eff01767de02 271 app_timer_id_t previous;
bogdanm 0:eff01767de02 272 app_timer_id_t current;
bogdanm 0:eff01767de02 273 uint32_t timeout;
bogdanm 0:eff01767de02 274
bogdanm 0:eff01767de02 275 // Find the timer's position in timer list
bogdanm 0:eff01767de02 276 previous = m_timer_id_head;
bogdanm 0:eff01767de02 277 current = previous;
Rohit Grover 37:c29c330d942c 278
bogdanm 0:eff01767de02 279 while (current != TIMER_NULL)
bogdanm 0:eff01767de02 280 {
bogdanm 0:eff01767de02 281 if (current == timer_id)
bogdanm 0:eff01767de02 282 {
bogdanm 0:eff01767de02 283 break;
bogdanm 0:eff01767de02 284 }
bogdanm 0:eff01767de02 285 previous = current;
bogdanm 0:eff01767de02 286 current = mp_nodes[current].next;
bogdanm 0:eff01767de02 287 }
bogdanm 0:eff01767de02 288
bogdanm 0:eff01767de02 289 // Timer not in active list
bogdanm 0:eff01767de02 290 if (current == TIMER_NULL)
bogdanm 0:eff01767de02 291 {
bogdanm 0:eff01767de02 292 return;
bogdanm 0:eff01767de02 293 }
bogdanm 0:eff01767de02 294
bogdanm 0:eff01767de02 295 // Timer is the first in the list
bogdanm 0:eff01767de02 296 if (previous == current)
bogdanm 0:eff01767de02 297 {
bogdanm 0:eff01767de02 298 m_timer_id_head = mp_nodes[m_timer_id_head].next;
bogdanm 0:eff01767de02 299 }
bogdanm 0:eff01767de02 300
bogdanm 0:eff01767de02 301 // Remaining timeout between next timeout
bogdanm 0:eff01767de02 302 timeout = mp_nodes[current].ticks_to_expire;
bogdanm 0:eff01767de02 303
bogdanm 0:eff01767de02 304 // Link previous timer with next of this timer, i.e. removing the timer from list
bogdanm 0:eff01767de02 305 mp_nodes[previous].next = mp_nodes[current].next;
bogdanm 0:eff01767de02 306
bogdanm 0:eff01767de02 307 // If this is not the last timer, increment the next timer by this timer timeout
bogdanm 0:eff01767de02 308 current = mp_nodes[previous].next;
bogdanm 0:eff01767de02 309 if (current != TIMER_NULL)
bogdanm 0:eff01767de02 310 {
bogdanm 0:eff01767de02 311 mp_nodes[current].ticks_to_expire += timeout;
bogdanm 0:eff01767de02 312 }
bogdanm 0:eff01767de02 313 }
bogdanm 0:eff01767de02 314
bogdanm 0:eff01767de02 315
bogdanm 0:eff01767de02 316 /**@brief Function for scheduling a check for timeouts by generating a RTC1 interrupt.
bogdanm 0:eff01767de02 317 */
bogdanm 0:eff01767de02 318 static void timer_timeouts_check_sched(void)
bogdanm 0:eff01767de02 319 {
bogdanm 0:eff01767de02 320 NVIC_SetPendingIRQ(RTC1_IRQn);
bogdanm 0:eff01767de02 321 }
bogdanm 0:eff01767de02 322
bogdanm 0:eff01767de02 323
bogdanm 0:eff01767de02 324 /**@brief Function for scheduling a timer list update by generating a SWI0 interrupt.
bogdanm 0:eff01767de02 325 */
bogdanm 0:eff01767de02 326 static void timer_list_handler_sched(void)
bogdanm 0:eff01767de02 327 {
bogdanm 0:eff01767de02 328 NVIC_SetPendingIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 329 }
bogdanm 0:eff01767de02 330
bogdanm 0:eff01767de02 331
bogdanm 0:eff01767de02 332 /**@brief Function for executing an application timeout handler, either by calling it directly, or
bogdanm 0:eff01767de02 333 * by passing an event to the @ref app_scheduler.
bogdanm 0:eff01767de02 334 *
bogdanm 0:eff01767de02 335 * @param[in] p_timer Pointer to expired timer.
bogdanm 0:eff01767de02 336 */
bogdanm 0:eff01767de02 337 static void timeout_handler_exec(timer_node_t * p_timer)
bogdanm 0:eff01767de02 338 {
bogdanm 0:eff01767de02 339 if (m_evt_schedule_func != NULL)
bogdanm 0:eff01767de02 340 {
bogdanm 0:eff01767de02 341 uint32_t err_code = m_evt_schedule_func(p_timer->p_timeout_handler, p_timer->p_context);
bogdanm 0:eff01767de02 342 APP_ERROR_CHECK(err_code);
bogdanm 0:eff01767de02 343 }
bogdanm 0:eff01767de02 344 else
bogdanm 0:eff01767de02 345 {
bogdanm 0:eff01767de02 346 p_timer->p_timeout_handler(p_timer->p_context);
bogdanm 0:eff01767de02 347 }
bogdanm 0:eff01767de02 348 }
bogdanm 0:eff01767de02 349
bogdanm 0:eff01767de02 350
bogdanm 0:eff01767de02 351 /**@brief Function for checking for expired timers.
bogdanm 0:eff01767de02 352 */
bogdanm 0:eff01767de02 353 static void timer_timeouts_check(void)
bogdanm 0:eff01767de02 354 {
Rohit Grover 37:c29c330d942c 355 // Handle expired of timer
bogdanm 0:eff01767de02 356 if (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 357 {
bogdanm 0:eff01767de02 358 app_timer_id_t timer_id;
bogdanm 0:eff01767de02 359 uint32_t ticks_elapsed;
bogdanm 0:eff01767de02 360 uint32_t ticks_expired;
bogdanm 0:eff01767de02 361
Rohit Grover 37:c29c330d942c 362 // Initialize actual elapsed ticks being consumed to 0
bogdanm 0:eff01767de02 363 ticks_expired = 0;
bogdanm 0:eff01767de02 364
bogdanm 0:eff01767de02 365 // ticks_elapsed is collected here, job will use it
bogdanm 0:eff01767de02 366 ticks_elapsed = ticks_diff_get(rtc1_counter_get(), m_ticks_latest);
bogdanm 0:eff01767de02 367
Rohit Grover 37:c29c330d942c 368 // Auto variable containing the head of timers expiring
bogdanm 0:eff01767de02 369 timer_id = m_timer_id_head;
bogdanm 0:eff01767de02 370
Rohit Grover 37:c29c330d942c 371 // Expire all timers within ticks_elapsed and collect ticks_expired
bogdanm 0:eff01767de02 372 while (timer_id != TIMER_NULL)
bogdanm 0:eff01767de02 373 {
bogdanm 0:eff01767de02 374 timer_node_t * p_timer;
bogdanm 0:eff01767de02 375
Rohit Grover 37:c29c330d942c 376 // Auto variable for current timer node
bogdanm 0:eff01767de02 377 p_timer = &mp_nodes[timer_id];
bogdanm 0:eff01767de02 378
Rohit Grover 37:c29c330d942c 379 // Do nothing if timer did not expire
bogdanm 0:eff01767de02 380 if (ticks_elapsed < p_timer->ticks_to_expire)
bogdanm 0:eff01767de02 381 {
bogdanm 0:eff01767de02 382 break;
bogdanm 0:eff01767de02 383 }
bogdanm 0:eff01767de02 384
Rohit Grover 37:c29c330d942c 385 // Decrement ticks_elapsed and collect expired ticks
bogdanm 0:eff01767de02 386 ticks_elapsed -= p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 387 ticks_expired += p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 388
Rohit Grover 37:c29c330d942c 389 // Move to next timer
bogdanm 0:eff01767de02 390 timer_id = p_timer->next;
bogdanm 0:eff01767de02 391
Rohit Grover 37:c29c330d942c 392 // Execute Task
bogdanm 0:eff01767de02 393 timeout_handler_exec(p_timer);
bogdanm 0:eff01767de02 394 }
bogdanm 0:eff01767de02 395
bogdanm 0:eff01767de02 396 // Prepare to queue the ticks expired in the m_ticks_elapsed queue.
bogdanm 0:eff01767de02 397 if (m_ticks_elapsed_q_read_ind == m_ticks_elapsed_q_write_ind)
bogdanm 0:eff01767de02 398 {
bogdanm 0:eff01767de02 399 // The read index of the queue is equal to the write index. This means the new
bogdanm 0:eff01767de02 400 // value of ticks_expired should be stored at a new location in the m_ticks_elapsed
bogdanm 0:eff01767de02 401 // queue (which is implemented as a double buffer).
bogdanm 0:eff01767de02 402
bogdanm 0:eff01767de02 403 // Check if there will be a queue overflow.
bogdanm 0:eff01767de02 404 if (++m_ticks_elapsed_q_write_ind == CONTEXT_QUEUE_SIZE_MAX)
bogdanm 0:eff01767de02 405 {
bogdanm 0:eff01767de02 406 // There will be a queue overflow. Hence the write index should point to the start
bogdanm 0:eff01767de02 407 // of the queue.
bogdanm 0:eff01767de02 408 m_ticks_elapsed_q_write_ind = 0;
bogdanm 0:eff01767de02 409 }
bogdanm 0:eff01767de02 410 }
bogdanm 0:eff01767de02 411
bogdanm 0:eff01767de02 412 // Queue the ticks expired.
bogdanm 0:eff01767de02 413 m_ticks_elapsed[m_ticks_elapsed_q_write_ind] = ticks_expired;
bogdanm 0:eff01767de02 414
bogdanm 0:eff01767de02 415 timer_list_handler_sched();
bogdanm 0:eff01767de02 416 }
bogdanm 0:eff01767de02 417 }
bogdanm 0:eff01767de02 418
bogdanm 0:eff01767de02 419
bogdanm 0:eff01767de02 420 /**@brief Function for acquiring the number of ticks elapsed.
bogdanm 0:eff01767de02 421 *
bogdanm 0:eff01767de02 422 * @param[out] p_ticks_elapsed Number of ticks elapsed.
bogdanm 0:eff01767de02 423 *
bogdanm 0:eff01767de02 424 * @return TRUE if elapsed ticks was read from queue, FALSE otherwise.
bogdanm 0:eff01767de02 425 */
bogdanm 0:eff01767de02 426 static bool elapsed_ticks_acquire(uint32_t * p_ticks_elapsed)
bogdanm 0:eff01767de02 427 {
Rohit Grover 37:c29c330d942c 428 // Pick the elapsed value from queue
bogdanm 0:eff01767de02 429 if (m_ticks_elapsed_q_read_ind != m_ticks_elapsed_q_write_ind)
bogdanm 0:eff01767de02 430 {
Rohit Grover 37:c29c330d942c 431 // Dequeue elapsed value
bogdanm 0:eff01767de02 432 m_ticks_elapsed_q_read_ind++;
bogdanm 0:eff01767de02 433 if (m_ticks_elapsed_q_read_ind == CONTEXT_QUEUE_SIZE_MAX)
bogdanm 0:eff01767de02 434 {
bogdanm 0:eff01767de02 435 m_ticks_elapsed_q_read_ind = 0;
bogdanm 0:eff01767de02 436 }
bogdanm 0:eff01767de02 437
bogdanm 0:eff01767de02 438 *p_ticks_elapsed = m_ticks_elapsed[m_ticks_elapsed_q_read_ind];
bogdanm 0:eff01767de02 439
bogdanm 0:eff01767de02 440 m_ticks_latest += *p_ticks_elapsed;
bogdanm 0:eff01767de02 441 m_ticks_latest &= MAX_RTC_COUNTER_VAL;
bogdanm 0:eff01767de02 442
bogdanm 0:eff01767de02 443 return true;
bogdanm 0:eff01767de02 444 }
bogdanm 0:eff01767de02 445 else
bogdanm 0:eff01767de02 446 {
Rohit Grover 37:c29c330d942c 447 // No elapsed value in queue
bogdanm 0:eff01767de02 448 *p_ticks_elapsed = 0;
bogdanm 0:eff01767de02 449 return false;
bogdanm 0:eff01767de02 450 }
bogdanm 0:eff01767de02 451 }
bogdanm 0:eff01767de02 452
bogdanm 0:eff01767de02 453
bogdanm 0:eff01767de02 454 /**@brief Function for handling the timer list deletions.
bogdanm 0:eff01767de02 455 *
bogdanm 0:eff01767de02 456 * @return TRUE if Capture Compare register must be updated, FALSE otherwise.
bogdanm 0:eff01767de02 457 */
bogdanm 0:eff01767de02 458 static bool list_deletions_handler(void)
bogdanm 0:eff01767de02 459 {
bogdanm 0:eff01767de02 460 app_timer_id_t timer_id_old_head;
bogdanm 0:eff01767de02 461 uint8_t user_id;
bogdanm 0:eff01767de02 462
bogdanm 0:eff01767de02 463 // Remember the old head, so as to decide if new compare needs to be set
bogdanm 0:eff01767de02 464 timer_id_old_head = m_timer_id_head;
bogdanm 0:eff01767de02 465
bogdanm 0:eff01767de02 466 user_id = m_user_array_size;
bogdanm 0:eff01767de02 467 while (user_id--)
bogdanm 0:eff01767de02 468 {
bogdanm 0:eff01767de02 469 timer_user_t * p_user = &mp_users[user_id];
bogdanm 0:eff01767de02 470 uint8_t user_ops_first = p_user->first;
Rohit Grover 37:c29c330d942c 471
bogdanm 0:eff01767de02 472 while (user_ops_first != p_user->last)
bogdanm 0:eff01767de02 473 {
bogdanm 0:eff01767de02 474 timer_node_t * p_timer;
bogdanm 0:eff01767de02 475 timer_user_op_t * p_user_op = &p_user->p_user_op_queue[user_ops_first];
bogdanm 0:eff01767de02 476
Rohit Grover 37:c29c330d942c 477 // Traverse to next operation in queue
bogdanm 0:eff01767de02 478 user_ops_first++;
bogdanm 0:eff01767de02 479 if (user_ops_first == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 480 {
bogdanm 0:eff01767de02 481 user_ops_first = 0;
bogdanm 0:eff01767de02 482 }
bogdanm 0:eff01767de02 483
bogdanm 0:eff01767de02 484 switch (p_user_op->op_type)
bogdanm 0:eff01767de02 485 {
bogdanm 0:eff01767de02 486 case TIMER_USER_OP_TYPE_STOP:
bogdanm 0:eff01767de02 487 // Delete node if timer is running
bogdanm 0:eff01767de02 488 p_timer = &mp_nodes[p_user_op->timer_id];
bogdanm 0:eff01767de02 489 if (p_timer->is_running)
bogdanm 0:eff01767de02 490 {
bogdanm 0:eff01767de02 491 timer_list_remove(p_user_op->timer_id);
bogdanm 0:eff01767de02 492 p_timer->is_running = false;
bogdanm 0:eff01767de02 493 }
bogdanm 0:eff01767de02 494 break;
Rohit Grover 37:c29c330d942c 495
bogdanm 0:eff01767de02 496 case TIMER_USER_OP_TYPE_STOP_ALL:
bogdanm 0:eff01767de02 497 // Delete list of running timers, and mark all timers as not running
bogdanm 0:eff01767de02 498 while (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 499 {
bogdanm 0:eff01767de02 500 timer_node_t * p_head = &mp_nodes[m_timer_id_head];
bogdanm 0:eff01767de02 501
bogdanm 0:eff01767de02 502 p_head->is_running = false;
bogdanm 0:eff01767de02 503 m_timer_id_head = p_head->next;
bogdanm 0:eff01767de02 504 }
bogdanm 0:eff01767de02 505 break;
Rohit Grover 37:c29c330d942c 506
bogdanm 0:eff01767de02 507 default:
bogdanm 0:eff01767de02 508 // No implementation needed.
bogdanm 0:eff01767de02 509 break;
bogdanm 0:eff01767de02 510 }
bogdanm 0:eff01767de02 511 }
bogdanm 0:eff01767de02 512 }
bogdanm 0:eff01767de02 513
bogdanm 0:eff01767de02 514 // Detect change in head of the list
bogdanm 0:eff01767de02 515 return (m_timer_id_head != timer_id_old_head);
bogdanm 0:eff01767de02 516 }
bogdanm 0:eff01767de02 517
bogdanm 0:eff01767de02 518
bogdanm 0:eff01767de02 519 /**@brief Function for updating the timer list for expired timers.
bogdanm 0:eff01767de02 520 *
bogdanm 0:eff01767de02 521 * @param[in] ticks_elapsed Number of elapsed ticks.
bogdanm 0:eff01767de02 522 * @param[in] ticks_previous Previous known value of the RTC counter.
bogdanm 0:eff01767de02 523 * @param[out] p_restart_list_head List of repeating timers to be restarted.
bogdanm 0:eff01767de02 524 */
bogdanm 0:eff01767de02 525 static void expired_timers_handler(uint32_t ticks_elapsed,
bogdanm 0:eff01767de02 526 uint32_t ticks_previous,
bogdanm 0:eff01767de02 527 app_timer_id_t * p_restart_list_head)
bogdanm 0:eff01767de02 528 {
bogdanm 0:eff01767de02 529 uint32_t ticks_expired = 0;
bogdanm 0:eff01767de02 530
bogdanm 0:eff01767de02 531 while (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 532 {
bogdanm 0:eff01767de02 533 timer_node_t * p_timer;
bogdanm 0:eff01767de02 534 app_timer_id_t id_expired;
bogdanm 0:eff01767de02 535
Rohit Grover 37:c29c330d942c 536 // Auto variable for current timer node
bogdanm 0:eff01767de02 537 p_timer = &mp_nodes[m_timer_id_head];
bogdanm 0:eff01767de02 538
Rohit Grover 37:c29c330d942c 539 // Do nothing if timer did not expire
bogdanm 0:eff01767de02 540 if (ticks_elapsed < p_timer->ticks_to_expire)
bogdanm 0:eff01767de02 541 {
bogdanm 0:eff01767de02 542 p_timer->ticks_to_expire -= ticks_elapsed;
bogdanm 0:eff01767de02 543 break;
bogdanm 0:eff01767de02 544 }
bogdanm 0:eff01767de02 545
Rohit Grover 37:c29c330d942c 546 // Decrement ticks_elapsed and collect expired ticks
bogdanm 0:eff01767de02 547 ticks_elapsed -= p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 548 ticks_expired += p_timer->ticks_to_expire;
bogdanm 0:eff01767de02 549
bogdanm 0:eff01767de02 550 // Timer expired, set ticks_to_expire zero
bogdanm 0:eff01767de02 551 p_timer->ticks_to_expire = 0;
bogdanm 0:eff01767de02 552 p_timer->is_running = false;
bogdanm 0:eff01767de02 553
Rohit Grover 37:c29c330d942c 554 // Remove the expired timer from head
bogdanm 0:eff01767de02 555 id_expired = m_timer_id_head;
bogdanm 0:eff01767de02 556 m_timer_id_head = p_timer->next;
bogdanm 0:eff01767de02 557
Rohit Grover 37:c29c330d942c 558 // Timer will be restarted if periodic
bogdanm 0:eff01767de02 559 if (p_timer->ticks_periodic_interval != 0)
bogdanm 0:eff01767de02 560 {
bogdanm 0:eff01767de02 561 p_timer->ticks_at_start = (ticks_previous + ticks_expired) & MAX_RTC_COUNTER_VAL;
bogdanm 0:eff01767de02 562 p_timer->ticks_first_interval = p_timer->ticks_periodic_interval;
bogdanm 0:eff01767de02 563 p_timer->next = *p_restart_list_head;
bogdanm 0:eff01767de02 564 *p_restart_list_head = id_expired;
bogdanm 0:eff01767de02 565 }
bogdanm 0:eff01767de02 566 }
bogdanm 0:eff01767de02 567 }
bogdanm 0:eff01767de02 568
bogdanm 0:eff01767de02 569
bogdanm 0:eff01767de02 570 /**@brief Function for handling timer list insertions.
bogdanm 0:eff01767de02 571 *
bogdanm 0:eff01767de02 572 * @param[in] p_restart_list_head List of repeating timers to be restarted.
bogdanm 0:eff01767de02 573 *
bogdanm 0:eff01767de02 574 * @return TRUE if Capture Compare register must be updated, FALSE otherwise.
bogdanm 0:eff01767de02 575 */
bogdanm 0:eff01767de02 576 static bool list_insertions_handler(app_timer_id_t restart_list_head)
bogdanm 0:eff01767de02 577 {
bogdanm 0:eff01767de02 578 app_timer_id_t timer_id_old_head;
bogdanm 0:eff01767de02 579 uint8_t user_id;
bogdanm 0:eff01767de02 580
bogdanm 0:eff01767de02 581 // Remember the old head, so as to decide if new compare needs to be set
bogdanm 0:eff01767de02 582 timer_id_old_head = m_timer_id_head;
bogdanm 0:eff01767de02 583
bogdanm 0:eff01767de02 584 user_id = m_user_array_size;
bogdanm 0:eff01767de02 585 while (user_id--)
bogdanm 0:eff01767de02 586 {
bogdanm 0:eff01767de02 587 timer_user_t * p_user = &mp_users[user_id];
bogdanm 0:eff01767de02 588
Rohit Grover 37:c29c330d942c 589 // Handle insertions of timers
bogdanm 0:eff01767de02 590 while ((restart_list_head != TIMER_NULL) || (p_user->first != p_user->last))
bogdanm 0:eff01767de02 591 {
bogdanm 0:eff01767de02 592 app_timer_id_t id_start;
bogdanm 0:eff01767de02 593 timer_node_t * p_timer;
bogdanm 0:eff01767de02 594
bogdanm 0:eff01767de02 595 if (restart_list_head != TIMER_NULL)
bogdanm 0:eff01767de02 596 {
bogdanm 0:eff01767de02 597 id_start = restart_list_head;
bogdanm 0:eff01767de02 598 p_timer = &mp_nodes[id_start];
bogdanm 0:eff01767de02 599 restart_list_head = p_timer->next;
bogdanm 0:eff01767de02 600 }
bogdanm 0:eff01767de02 601 else
bogdanm 0:eff01767de02 602 {
bogdanm 0:eff01767de02 603 timer_user_op_t * p_user_op = &p_user->p_user_op_queue[p_user->first];
bogdanm 0:eff01767de02 604
bogdanm 0:eff01767de02 605 p_user->first++;
bogdanm 0:eff01767de02 606 if (p_user->first == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 607 {
bogdanm 0:eff01767de02 608 p_user->first = 0;
bogdanm 0:eff01767de02 609 }
bogdanm 0:eff01767de02 610
bogdanm 0:eff01767de02 611 id_start = p_user_op->timer_id;
bogdanm 0:eff01767de02 612 p_timer = &mp_nodes[id_start];
bogdanm 0:eff01767de02 613
bogdanm 0:eff01767de02 614 if ((p_user_op->op_type != TIMER_USER_OP_TYPE_START) || p_timer->is_running)
bogdanm 0:eff01767de02 615 {
bogdanm 0:eff01767de02 616 continue;
bogdanm 0:eff01767de02 617 }
bogdanm 0:eff01767de02 618
bogdanm 0:eff01767de02 619 p_timer->ticks_at_start = p_user_op->params.start.ticks_at_start;
bogdanm 0:eff01767de02 620 p_timer->ticks_first_interval = p_user_op->params.start.ticks_first_interval;
bogdanm 0:eff01767de02 621 p_timer->ticks_periodic_interval = p_user_op->params.start.ticks_periodic_interval;
bogdanm 0:eff01767de02 622 p_timer->p_context = p_user_op->params.start.p_context;
bogdanm 0:eff01767de02 623 }
bogdanm 0:eff01767de02 624
Rohit Grover 37:c29c330d942c 625 // Prepare the node to be inserted
bogdanm 0:eff01767de02 626 if (
bogdanm 0:eff01767de02 627 ((p_timer->ticks_at_start - m_ticks_latest) & MAX_RTC_COUNTER_VAL)
bogdanm 0:eff01767de02 628 <
bogdanm 0:eff01767de02 629 (MAX_RTC_COUNTER_VAL / 2)
bogdanm 0:eff01767de02 630 )
bogdanm 0:eff01767de02 631 {
Rohit Grover 37:c29c330d942c 632 p_timer->ticks_to_expire = ticks_diff_get(p_timer->ticks_at_start, m_ticks_latest) +
bogdanm 0:eff01767de02 633 p_timer->ticks_first_interval;
bogdanm 0:eff01767de02 634 }
bogdanm 0:eff01767de02 635 else
bogdanm 0:eff01767de02 636 {
bogdanm 0:eff01767de02 637 uint32_t delta_current_start;
bogdanm 0:eff01767de02 638
bogdanm 0:eff01767de02 639 delta_current_start = ticks_diff_get(m_ticks_latest, p_timer->ticks_at_start);
bogdanm 0:eff01767de02 640 if (p_timer->ticks_first_interval > delta_current_start)
bogdanm 0:eff01767de02 641 {
bogdanm 0:eff01767de02 642 p_timer->ticks_to_expire = p_timer->ticks_first_interval - delta_current_start;
bogdanm 0:eff01767de02 643 }
bogdanm 0:eff01767de02 644 else
bogdanm 0:eff01767de02 645 {
bogdanm 0:eff01767de02 646 p_timer->ticks_to_expire = 0;
bogdanm 0:eff01767de02 647 }
bogdanm 0:eff01767de02 648 }
bogdanm 0:eff01767de02 649
bogdanm 0:eff01767de02 650 p_timer->ticks_at_start = 0;
bogdanm 0:eff01767de02 651 p_timer->ticks_first_interval = 0;
bogdanm 0:eff01767de02 652 p_timer->is_running = true;
bogdanm 0:eff01767de02 653 p_timer->next = TIMER_NULL;
bogdanm 0:eff01767de02 654
Rohit Grover 37:c29c330d942c 655 // Insert into list
bogdanm 0:eff01767de02 656 timer_list_insert(id_start);
bogdanm 0:eff01767de02 657 }
bogdanm 0:eff01767de02 658 }
Rohit Grover 37:c29c330d942c 659
bogdanm 0:eff01767de02 660 return (m_timer_id_head != timer_id_old_head);
bogdanm 0:eff01767de02 661 }
bogdanm 0:eff01767de02 662
bogdanm 0:eff01767de02 663
bogdanm 0:eff01767de02 664 /**@brief Function for updating the Capture Compare register.
bogdanm 0:eff01767de02 665 */
bogdanm 0:eff01767de02 666 static void compare_reg_update(app_timer_id_t timer_id_head_old)
bogdanm 0:eff01767de02 667 {
Rohit Grover 37:c29c330d942c 668 // Setup the timeout for timers on the head of the list
bogdanm 0:eff01767de02 669 if (m_timer_id_head != TIMER_NULL)
bogdanm 0:eff01767de02 670 {
bogdanm 0:eff01767de02 671 uint32_t ticks_to_expire = mp_nodes[m_timer_id_head].ticks_to_expire;
bogdanm 0:eff01767de02 672 uint32_t pre_counter_val = rtc1_counter_get();
bogdanm 0:eff01767de02 673 uint32_t cc = m_ticks_latest;
bogdanm 0:eff01767de02 674 uint32_t ticks_elapsed = ticks_diff_get(pre_counter_val, cc) + RTC_COMPARE_OFFSET_MIN;
bogdanm 0:eff01767de02 675
bogdanm 0:eff01767de02 676 if (timer_id_head_old == TIMER_NULL)
bogdanm 0:eff01767de02 677 {
bogdanm 0:eff01767de02 678 // No timers were already running, start RTC
bogdanm 0:eff01767de02 679 rtc1_start();
bogdanm 0:eff01767de02 680 }
bogdanm 0:eff01767de02 681
bogdanm 0:eff01767de02 682 cc += (ticks_elapsed < ticks_to_expire) ? ticks_to_expire : ticks_elapsed;
bogdanm 0:eff01767de02 683 cc &= MAX_RTC_COUNTER_VAL;
Rohit Grover 37:c29c330d942c 684
bogdanm 0:eff01767de02 685 rtc1_compare0_set(cc);
bogdanm 0:eff01767de02 686
bogdanm 0:eff01767de02 687 uint32_t post_counter_val = rtc1_counter_get();
bogdanm 0:eff01767de02 688
bogdanm 0:eff01767de02 689 if (
bogdanm 0:eff01767de02 690 (ticks_diff_get(post_counter_val, pre_counter_val) + RTC_COMPARE_OFFSET_MIN)
bogdanm 0:eff01767de02 691 >
bogdanm 0:eff01767de02 692 ticks_diff_get(cc, pre_counter_val)
bogdanm 0:eff01767de02 693 )
bogdanm 0:eff01767de02 694 {
bogdanm 0:eff01767de02 695 // When this happens the COMPARE event may not be triggered by the RTC.
bogdanm 0:eff01767de02 696 // The nRF51 Series User Specification states that if the COUNTER value is N
bogdanm 0:eff01767de02 697 // (i.e post_counter_val = N), writing N or N+1 to a CC register may not trigger a
bogdanm 0:eff01767de02 698 // COMPARE event. Hence the RTC interrupt is forcefully pended by calling the following
bogdanm 0:eff01767de02 699 // function.
bogdanm 0:eff01767de02 700 timer_timeouts_check_sched();
bogdanm 0:eff01767de02 701 }
bogdanm 0:eff01767de02 702 }
bogdanm 0:eff01767de02 703 else
bogdanm 0:eff01767de02 704 {
bogdanm 0:eff01767de02 705 // No timers are running, stop RTC
bogdanm 0:eff01767de02 706 rtc1_stop();
bogdanm 0:eff01767de02 707 }
bogdanm 0:eff01767de02 708 }
bogdanm 0:eff01767de02 709
bogdanm 0:eff01767de02 710
bogdanm 0:eff01767de02 711 /**@brief Function for handling changes to the timer list.
bogdanm 0:eff01767de02 712 */
bogdanm 0:eff01767de02 713 static void timer_list_handler(void)
bogdanm 0:eff01767de02 714 {
bogdanm 0:eff01767de02 715 app_timer_id_t restart_list_head = TIMER_NULL;
bogdanm 0:eff01767de02 716 uint32_t ticks_elapsed;
bogdanm 0:eff01767de02 717 uint32_t ticks_previous;
bogdanm 0:eff01767de02 718 bool ticks_have_elapsed;
bogdanm 0:eff01767de02 719 bool compare_update;
bogdanm 0:eff01767de02 720 app_timer_id_t timer_id_head_old;
Rohit Grover 37:c29c330d942c 721
bogdanm 0:eff01767de02 722 // Back up the previous known tick and previous list head
bogdanm 0:eff01767de02 723 ticks_previous = m_ticks_latest;
bogdanm 0:eff01767de02 724 timer_id_head_old = m_timer_id_head;
Rohit Grover 37:c29c330d942c 725
bogdanm 0:eff01767de02 726 // Get number of elapsed ticks
bogdanm 0:eff01767de02 727 ticks_have_elapsed = elapsed_ticks_acquire(&ticks_elapsed);
bogdanm 0:eff01767de02 728
bogdanm 0:eff01767de02 729 // Handle list deletions
bogdanm 0:eff01767de02 730 compare_update = list_deletions_handler();
Rohit Grover 37:c29c330d942c 731
bogdanm 0:eff01767de02 732 // Handle expired timers
bogdanm 0:eff01767de02 733 if (ticks_have_elapsed)
bogdanm 0:eff01767de02 734 {
bogdanm 0:eff01767de02 735 expired_timers_handler(ticks_elapsed, ticks_previous, &restart_list_head);
bogdanm 0:eff01767de02 736 compare_update = true;
bogdanm 0:eff01767de02 737 }
Rohit Grover 37:c29c330d942c 738
bogdanm 0:eff01767de02 739 // Handle list insertions
bogdanm 0:eff01767de02 740 if (list_insertions_handler(restart_list_head))
bogdanm 0:eff01767de02 741 {
bogdanm 0:eff01767de02 742 compare_update = true;
bogdanm 0:eff01767de02 743 }
bogdanm 0:eff01767de02 744
bogdanm 0:eff01767de02 745 // Update compare register if necessary
bogdanm 0:eff01767de02 746 if (compare_update)
bogdanm 0:eff01767de02 747 {
bogdanm 0:eff01767de02 748 compare_reg_update(timer_id_head_old);
bogdanm 0:eff01767de02 749 }
bogdanm 0:eff01767de02 750 }
bogdanm 0:eff01767de02 751
bogdanm 0:eff01767de02 752
bogdanm 0:eff01767de02 753 /**@brief Function for enqueueing a new operations queue entry.
bogdanm 0:eff01767de02 754 *
bogdanm 0:eff01767de02 755 * @param[in] p_user User that the entry is to be enqueued for.
bogdanm 0:eff01767de02 756 * @param[in] last_index Index of the next last index to be enqueued.
bogdanm 0:eff01767de02 757 */
bogdanm 0:eff01767de02 758 static void user_op_enque(timer_user_t * p_user, app_timer_id_t last_index)
bogdanm 0:eff01767de02 759 {
bogdanm 0:eff01767de02 760 p_user->last = last_index;
bogdanm 0:eff01767de02 761 }
bogdanm 0:eff01767de02 762
bogdanm 0:eff01767de02 763
bogdanm 0:eff01767de02 764 /**@brief Function for allocating a new operations queue entry.
bogdanm 0:eff01767de02 765 *
bogdanm 0:eff01767de02 766 * @param[in] p_user User that the entry is to be allocated for.
bogdanm 0:eff01767de02 767 * @param[out] p_last_index Index of the next last index to be enqueued.
bogdanm 0:eff01767de02 768 *
bogdanm 0:eff01767de02 769 * @return Pointer to allocated queue entry, or NULL if queue is full.
bogdanm 0:eff01767de02 770 */
bogdanm 0:eff01767de02 771 static timer_user_op_t * user_op_alloc(timer_user_t * p_user, app_timer_id_t * p_last_index)
Rohit Grover 37:c29c330d942c 772 {
bogdanm 0:eff01767de02 773 app_timer_id_t last;
bogdanm 0:eff01767de02 774 timer_user_op_t * p_user_op;
Rohit Grover 37:c29c330d942c 775
bogdanm 0:eff01767de02 776 last = p_user->last + 1;
bogdanm 0:eff01767de02 777 if (last == p_user->user_op_queue_size)
bogdanm 0:eff01767de02 778 {
bogdanm 0:eff01767de02 779 // Overflow case.
bogdanm 0:eff01767de02 780 last = 0;
bogdanm 0:eff01767de02 781 }
bogdanm 0:eff01767de02 782 if (last == p_user->first)
bogdanm 0:eff01767de02 783 {
bogdanm 0:eff01767de02 784 // Queue is full.
bogdanm 0:eff01767de02 785 return NULL;
bogdanm 0:eff01767de02 786 }
Rohit Grover 37:c29c330d942c 787
Rohit Grover 37:c29c330d942c 788 *p_last_index = last;
bogdanm 0:eff01767de02 789 p_user_op = &p_user->p_user_op_queue[p_user->last];
Rohit Grover 37:c29c330d942c 790
bogdanm 0:eff01767de02 791 return p_user_op;
bogdanm 0:eff01767de02 792 }
bogdanm 0:eff01767de02 793
bogdanm 0:eff01767de02 794
bogdanm 0:eff01767de02 795 /**@brief Function for scheduling a Timer Start operation.
bogdanm 0:eff01767de02 796 *
bogdanm 0:eff01767de02 797 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 798 * @param[in] timer_id Id of timer to start.
bogdanm 0:eff01767de02 799 * @param[in] timeout_initial Time (in ticks) to first timer expiry.
bogdanm 0:eff01767de02 800 * @param[in] timeout_periodic Time (in ticks) between periodic expiries.
bogdanm 0:eff01767de02 801 * @param[in] p_context General purpose pointer. Will be passed to the timeout handler when
bogdanm 0:eff01767de02 802 * the timer expires.
bogdanm 0:eff01767de02 803 * @return NRF_SUCCESS on success, otherwise an error code.
bogdanm 0:eff01767de02 804 */
bogdanm 0:eff01767de02 805 static uint32_t timer_start_op_schedule(timer_user_id_t user_id,
bogdanm 0:eff01767de02 806 app_timer_id_t timer_id,
bogdanm 0:eff01767de02 807 uint32_t timeout_initial,
bogdanm 0:eff01767de02 808 uint32_t timeout_periodic,
bogdanm 0:eff01767de02 809 void * p_context)
bogdanm 0:eff01767de02 810 {
bogdanm 0:eff01767de02 811 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 812
bogdanm 0:eff01767de02 813 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 814 if (p_user_op == NULL)
bogdanm 0:eff01767de02 815 {
bogdanm 0:eff01767de02 816 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 817 }
Rohit Grover 37:c29c330d942c 818
bogdanm 0:eff01767de02 819 p_user_op->op_type = TIMER_USER_OP_TYPE_START;
bogdanm 0:eff01767de02 820 p_user_op->timer_id = timer_id;
bogdanm 0:eff01767de02 821 p_user_op->params.start.ticks_at_start = rtc1_counter_get();
bogdanm 0:eff01767de02 822 p_user_op->params.start.ticks_first_interval = timeout_initial;
bogdanm 0:eff01767de02 823 p_user_op->params.start.ticks_periodic_interval = timeout_periodic;
bogdanm 0:eff01767de02 824 p_user_op->params.start.p_context = p_context;
Rohit Grover 37:c29c330d942c 825
Rohit Grover 37:c29c330d942c 826 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 827
bogdanm 0:eff01767de02 828 timer_list_handler_sched();
bogdanm 0:eff01767de02 829
bogdanm 0:eff01767de02 830 return NRF_SUCCESS;
bogdanm 0:eff01767de02 831 }
bogdanm 0:eff01767de02 832
bogdanm 0:eff01767de02 833
bogdanm 0:eff01767de02 834 /**@brief Function for scheduling a Timer Stop operation.
bogdanm 0:eff01767de02 835 *
bogdanm 0:eff01767de02 836 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 837 * @param[in] timer_id Id of timer to stop.
bogdanm 0:eff01767de02 838 *
bogdanm 0:eff01767de02 839 * @return NRF_SUCCESS on successful scheduling a timer stop operation. NRF_ERROR_NO_MEM when there
bogdanm 0:eff01767de02 840 * is no memory left to schedule the timer stop operation.
bogdanm 0:eff01767de02 841 */
bogdanm 0:eff01767de02 842 static uint32_t timer_stop_op_schedule(timer_user_id_t user_id, app_timer_id_t timer_id)
bogdanm 0:eff01767de02 843 {
bogdanm 0:eff01767de02 844 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 845
bogdanm 0:eff01767de02 846 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 847 if (p_user_op == NULL)
bogdanm 0:eff01767de02 848 {
bogdanm 0:eff01767de02 849 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 850 }
Rohit Grover 37:c29c330d942c 851
bogdanm 0:eff01767de02 852 p_user_op->op_type = TIMER_USER_OP_TYPE_STOP;
bogdanm 0:eff01767de02 853 p_user_op->timer_id = timer_id;
Rohit Grover 37:c29c330d942c 854
Rohit Grover 37:c29c330d942c 855 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 856
bogdanm 0:eff01767de02 857 timer_list_handler_sched();
bogdanm 0:eff01767de02 858
bogdanm 0:eff01767de02 859 return NRF_SUCCESS;
bogdanm 0:eff01767de02 860 }
bogdanm 0:eff01767de02 861
bogdanm 0:eff01767de02 862
bogdanm 0:eff01767de02 863 /**@brief Function for scheduling a Timer Stop All operation.
bogdanm 0:eff01767de02 864 *
bogdanm 0:eff01767de02 865 * @param[in] user_id Id of user calling this function.
bogdanm 0:eff01767de02 866 */
bogdanm 0:eff01767de02 867 static uint32_t timer_stop_all_op_schedule(timer_user_id_t user_id)
bogdanm 0:eff01767de02 868 {
bogdanm 0:eff01767de02 869 app_timer_id_t last_index;
Rohit Grover 37:c29c330d942c 870
bogdanm 0:eff01767de02 871 timer_user_op_t * p_user_op = user_op_alloc(&mp_users[user_id], &last_index);
bogdanm 0:eff01767de02 872 if (p_user_op == NULL)
bogdanm 0:eff01767de02 873 {
bogdanm 0:eff01767de02 874 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 875 }
Rohit Grover 37:c29c330d942c 876
bogdanm 0:eff01767de02 877 p_user_op->op_type = TIMER_USER_OP_TYPE_STOP_ALL;
bogdanm 0:eff01767de02 878 p_user_op->timer_id = TIMER_NULL;
Rohit Grover 37:c29c330d942c 879
Rohit Grover 37:c29c330d942c 880 user_op_enque(&mp_users[user_id], last_index);
bogdanm 0:eff01767de02 881
bogdanm 0:eff01767de02 882 timer_list_handler_sched();
bogdanm 0:eff01767de02 883
bogdanm 0:eff01767de02 884 return NRF_SUCCESS;
bogdanm 0:eff01767de02 885 }
bogdanm 0:eff01767de02 886
bogdanm 0:eff01767de02 887
bogdanm 0:eff01767de02 888 /**@brief Function for handling the RTC1 interrupt.
bogdanm 0:eff01767de02 889 *
bogdanm 0:eff01767de02 890 * @details Checks for timeouts, and executes timeout handlers for expired timers.
bogdanm 0:eff01767de02 891 */
bogdanm 0:eff01767de02 892 extern "C" void RTC1_IRQHandler(void)
bogdanm 0:eff01767de02 893 {
bogdanm 0:eff01767de02 894 // Clear all events (also unexpected ones)
bogdanm 0:eff01767de02 895 NRF_RTC1->EVENTS_COMPARE[0] = 0;
bogdanm 0:eff01767de02 896 NRF_RTC1->EVENTS_COMPARE[1] = 0;
bogdanm 0:eff01767de02 897 NRF_RTC1->EVENTS_COMPARE[2] = 0;
bogdanm 0:eff01767de02 898 NRF_RTC1->EVENTS_COMPARE[3] = 0;
bogdanm 0:eff01767de02 899 NRF_RTC1->EVENTS_TICK = 0;
bogdanm 0:eff01767de02 900 NRF_RTC1->EVENTS_OVRFLW = 0;
bogdanm 0:eff01767de02 901
bogdanm 0:eff01767de02 902 // Check for expired timers
bogdanm 0:eff01767de02 903 timer_timeouts_check();
bogdanm 0:eff01767de02 904 }
bogdanm 0:eff01767de02 905
bogdanm 0:eff01767de02 906 /**@brief Function for handling the SWI0 interrupt.
bogdanm 0:eff01767de02 907 *
bogdanm 0:eff01767de02 908 * @details Performs all updates to the timer list.
bogdanm 0:eff01767de02 909 */
bogdanm 0:eff01767de02 910 extern "C" void SWI0_IRQHandler(void)
bogdanm 0:eff01767de02 911 {
bogdanm 0:eff01767de02 912 timer_list_handler();
bogdanm 0:eff01767de02 913 }
bogdanm 0:eff01767de02 914
bogdanm 0:eff01767de02 915 uint32_t app_timer_init(uint32_t prescaler,
bogdanm 0:eff01767de02 916 uint8_t max_timers,
bogdanm 0:eff01767de02 917 uint8_t op_queues_size,
bogdanm 0:eff01767de02 918 void * p_buffer,
bogdanm 0:eff01767de02 919 app_timer_evt_schedule_func_t evt_schedule_func)
bogdanm 0:eff01767de02 920 {
bogdanm 0:eff01767de02 921 int i;
bogdanm 0:eff01767de02 922
bogdanm 0:eff01767de02 923 // Check that buffer is correctly aligned
bogdanm 0:eff01767de02 924 if (!is_word_aligned(p_buffer))
bogdanm 0:eff01767de02 925 {
bogdanm 0:eff01767de02 926 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 927 }
bogdanm 0:eff01767de02 928 // Check for NULL buffer
bogdanm 0:eff01767de02 929 if (p_buffer == NULL)
bogdanm 0:eff01767de02 930 {
bogdanm 0:eff01767de02 931 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 932 }
Rohit Grover 37:c29c330d942c 933
bogdanm 0:eff01767de02 934 // Stop RTC to prevent any running timers from expiring (in case of reinitialization)
bogdanm 0:eff01767de02 935 rtc1_stop();
Rohit Grover 37:c29c330d942c 936
bogdanm 0:eff01767de02 937 m_evt_schedule_func = evt_schedule_func;
bogdanm 0:eff01767de02 938
bogdanm 0:eff01767de02 939 // Initialize timer node array
bogdanm 0:eff01767de02 940 m_node_array_size = max_timers;
bogdanm 0:eff01767de02 941 mp_nodes = (timer_node_t *) p_buffer;
Rohit Grover 37:c29c330d942c 942
bogdanm 0:eff01767de02 943 for (i = 0; i < max_timers; i++)
bogdanm 0:eff01767de02 944 {
bogdanm 0:eff01767de02 945 mp_nodes[i].state = STATE_FREE;
bogdanm 0:eff01767de02 946 mp_nodes[i].is_running = false;
bogdanm 0:eff01767de02 947 }
Rohit Grover 37:c29c330d942c 948
bogdanm 0:eff01767de02 949 // Skip timer node array
bogdanm 0:eff01767de02 950 p_buffer = &((uint8_t *)p_buffer)[max_timers * sizeof(timer_node_t)];
Rohit Grover 37:c29c330d942c 951
bogdanm 0:eff01767de02 952 // Initialize users array
bogdanm 0:eff01767de02 953 m_user_array_size = APP_TIMER_INT_LEVELS;
bogdanm 0:eff01767de02 954 mp_users = (timer_user_t *) p_buffer;
Rohit Grover 37:c29c330d942c 955
bogdanm 0:eff01767de02 956 // Skip user array
bogdanm 0:eff01767de02 957 p_buffer = &((uint8_t *)p_buffer)[APP_TIMER_INT_LEVELS * sizeof(timer_user_t)];
bogdanm 0:eff01767de02 958
bogdanm 0:eff01767de02 959 // Initialize operation queues
bogdanm 0:eff01767de02 960 for (i = 0; i < APP_TIMER_INT_LEVELS; i++)
bogdanm 0:eff01767de02 961 {
bogdanm 0:eff01767de02 962 timer_user_t * p_user = &mp_users[i];
Rohit Grover 37:c29c330d942c 963
bogdanm 0:eff01767de02 964 p_user->first = 0;
bogdanm 0:eff01767de02 965 p_user->last = 0;
bogdanm 0:eff01767de02 966 p_user->user_op_queue_size = op_queues_size;
bogdanm 0:eff01767de02 967 p_user->p_user_op_queue = (timer_user_op_t *) p_buffer;
Rohit Grover 37:c29c330d942c 968
bogdanm 0:eff01767de02 969 // Skip operation queue
bogdanm 0:eff01767de02 970 p_buffer = &((uint8_t *)p_buffer)[op_queues_size * sizeof(timer_user_op_t)];
bogdanm 0:eff01767de02 971 }
bogdanm 0:eff01767de02 972
bogdanm 0:eff01767de02 973 m_timer_id_head = TIMER_NULL;
bogdanm 0:eff01767de02 974 m_ticks_elapsed_q_read_ind = 0;
bogdanm 0:eff01767de02 975 m_ticks_elapsed_q_write_ind = 0;
bogdanm 0:eff01767de02 976
bogdanm 0:eff01767de02 977 NVIC_ClearPendingIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 978 NVIC_SetPriority(SWI0_IRQn, SWI0_IRQ_PRI);
bogdanm 0:eff01767de02 979 NVIC_EnableIRQ(SWI0_IRQn);
bogdanm 0:eff01767de02 980
bogdanm 0:eff01767de02 981 rtc1_init(prescaler);
bogdanm 0:eff01767de02 982
bogdanm 0:eff01767de02 983 m_ticks_latest = rtc1_counter_get();
Rohit Grover 37:c29c330d942c 984
bogdanm 0:eff01767de02 985 return NRF_SUCCESS;
bogdanm 0:eff01767de02 986 }
bogdanm 0:eff01767de02 987
bogdanm 0:eff01767de02 988
bogdanm 0:eff01767de02 989 uint32_t app_timer_create(app_timer_id_t * p_timer_id,
bogdanm 0:eff01767de02 990 app_timer_mode_t mode,
bogdanm 0:eff01767de02 991 app_timer_timeout_handler_t timeout_handler)
bogdanm 0:eff01767de02 992 {
bogdanm 0:eff01767de02 993 int i;
bogdanm 0:eff01767de02 994
bogdanm 0:eff01767de02 995 // Check state and parameters
bogdanm 0:eff01767de02 996 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 997 {
bogdanm 0:eff01767de02 998 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 999 }
bogdanm 0:eff01767de02 1000 if (timeout_handler == NULL)
bogdanm 0:eff01767de02 1001 {
bogdanm 0:eff01767de02 1002 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1003 }
bogdanm 0:eff01767de02 1004 if (p_timer_id == NULL)
bogdanm 0:eff01767de02 1005 {
bogdanm 0:eff01767de02 1006 return NRF_ERROR_INVALID_PARAM;
Rohit Grover 37:c29c330d942c 1007 }
Rohit Grover 37:c29c330d942c 1008
bogdanm 0:eff01767de02 1009 // Find free timer
bogdanm 0:eff01767de02 1010 for (i = 0; i < m_node_array_size; i++)
bogdanm 0:eff01767de02 1011 {
bogdanm 0:eff01767de02 1012 if (mp_nodes[i].state == STATE_FREE)
bogdanm 0:eff01767de02 1013 {
bogdanm 0:eff01767de02 1014 mp_nodes[i].state = STATE_ALLOCATED;
bogdanm 0:eff01767de02 1015 mp_nodes[i].mode = mode;
bogdanm 0:eff01767de02 1016 mp_nodes[i].p_timeout_handler = timeout_handler;
Rohit Grover 37:c29c330d942c 1017
bogdanm 0:eff01767de02 1018 *p_timer_id = i;
bogdanm 0:eff01767de02 1019 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1020 }
bogdanm 0:eff01767de02 1021 }
Rohit Grover 37:c29c330d942c 1022
bogdanm 0:eff01767de02 1023 return NRF_ERROR_NO_MEM;
bogdanm 0:eff01767de02 1024 }
bogdanm 0:eff01767de02 1025
bogdanm 0:eff01767de02 1026
bogdanm 0:eff01767de02 1027 /**@brief Function for creating a timer user id from the current interrupt level.
bogdanm 0:eff01767de02 1028 *
bogdanm 0:eff01767de02 1029 * @return Timer user id.
bogdanm 0:eff01767de02 1030 */
bogdanm 0:eff01767de02 1031 static timer_user_id_t user_id_get(void)
bogdanm 0:eff01767de02 1032 {
bogdanm 0:eff01767de02 1033 timer_user_id_t ret;
bogdanm 0:eff01767de02 1034
bogdanm 0:eff01767de02 1035 STATIC_ASSERT(APP_TIMER_INT_LEVELS == 3);
Rohit Grover 37:c29c330d942c 1036
bogdanm 0:eff01767de02 1037 switch (current_int_priority_get())
bogdanm 0:eff01767de02 1038 {
bogdanm 0:eff01767de02 1039 case APP_IRQ_PRIORITY_HIGH:
bogdanm 0:eff01767de02 1040 ret = APP_HIGH_USER_ID;
bogdanm 0:eff01767de02 1041 break;
Rohit Grover 37:c29c330d942c 1042
bogdanm 0:eff01767de02 1043 case APP_IRQ_PRIORITY_LOW:
bogdanm 0:eff01767de02 1044 ret = APP_LOW_USER_ID;
bogdanm 0:eff01767de02 1045 break;
Rohit Grover 37:c29c330d942c 1046
bogdanm 0:eff01767de02 1047 default:
bogdanm 0:eff01767de02 1048 ret = THREAD_MODE_USER_ID;
bogdanm 0:eff01767de02 1049 break;
bogdanm 0:eff01767de02 1050 }
Rohit Grover 37:c29c330d942c 1051
bogdanm 0:eff01767de02 1052 return ret;
bogdanm 0:eff01767de02 1053 }
bogdanm 0:eff01767de02 1054
bogdanm 0:eff01767de02 1055
bogdanm 0:eff01767de02 1056 uint32_t app_timer_start(app_timer_id_t timer_id, uint32_t timeout_ticks, void * p_context)
bogdanm 0:eff01767de02 1057 {
bogdanm 0:eff01767de02 1058 uint32_t timeout_periodic;
Rohit Grover 37:c29c330d942c 1059
bogdanm 0:eff01767de02 1060 // Check state and parameters
bogdanm 0:eff01767de02 1061 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1062 {
bogdanm 0:eff01767de02 1063 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1064 }
bogdanm 0:eff01767de02 1065 if ((timer_id >= m_node_array_size) || (timeout_ticks < APP_TIMER_MIN_TIMEOUT_TICKS))
bogdanm 0:eff01767de02 1066 {
bogdanm 0:eff01767de02 1067 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1068 }
bogdanm 0:eff01767de02 1069 if (mp_nodes[timer_id].state != STATE_ALLOCATED)
bogdanm 0:eff01767de02 1070 {
bogdanm 0:eff01767de02 1071 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1072 }
Rohit Grover 37:c29c330d942c 1073
bogdanm 0:eff01767de02 1074 // Schedule timer start operation
bogdanm 0:eff01767de02 1075 timeout_periodic = (mp_nodes[timer_id].mode == APP_TIMER_MODE_REPEATED) ? timeout_ticks : 0;
bogdanm 0:eff01767de02 1076
bogdanm 0:eff01767de02 1077 return timer_start_op_schedule(user_id_get(),
bogdanm 0:eff01767de02 1078 timer_id,
bogdanm 0:eff01767de02 1079 timeout_ticks,
bogdanm 0:eff01767de02 1080 timeout_periodic,
bogdanm 0:eff01767de02 1081 p_context);
bogdanm 0:eff01767de02 1082 }
bogdanm 0:eff01767de02 1083
bogdanm 0:eff01767de02 1084
bogdanm 0:eff01767de02 1085 uint32_t app_timer_stop(app_timer_id_t timer_id)
bogdanm 0:eff01767de02 1086 {
bogdanm 0:eff01767de02 1087 // Check state and parameters
bogdanm 0:eff01767de02 1088 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1089 {
bogdanm 0:eff01767de02 1090 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1091 }
bogdanm 0:eff01767de02 1092 if (timer_id >= m_node_array_size)
bogdanm 0:eff01767de02 1093 {
bogdanm 0:eff01767de02 1094 return NRF_ERROR_INVALID_PARAM;
bogdanm 0:eff01767de02 1095 }
bogdanm 0:eff01767de02 1096 if (mp_nodes[timer_id].state != STATE_ALLOCATED)
bogdanm 0:eff01767de02 1097 {
bogdanm 0:eff01767de02 1098 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1099 }
Rohit Grover 37:c29c330d942c 1100
bogdanm 0:eff01767de02 1101 // Schedule timer stop operation
bogdanm 0:eff01767de02 1102 return timer_stop_op_schedule(user_id_get(), timer_id);
bogdanm 0:eff01767de02 1103 }
bogdanm 0:eff01767de02 1104
bogdanm 0:eff01767de02 1105
bogdanm 0:eff01767de02 1106 uint32_t app_timer_stop_all(void)
bogdanm 0:eff01767de02 1107 {
bogdanm 0:eff01767de02 1108 // Check state
bogdanm 0:eff01767de02 1109 if (mp_nodes == NULL)
bogdanm 0:eff01767de02 1110 {
bogdanm 0:eff01767de02 1111 return NRF_ERROR_INVALID_STATE;
bogdanm 0:eff01767de02 1112 }
bogdanm 0:eff01767de02 1113
bogdanm 0:eff01767de02 1114 return timer_stop_all_op_schedule(user_id_get());
bogdanm 0:eff01767de02 1115 }
bogdanm 0:eff01767de02 1116
bogdanm 0:eff01767de02 1117
bogdanm 0:eff01767de02 1118 uint32_t app_timer_cnt_get(uint32_t * p_ticks)
bogdanm 0:eff01767de02 1119 {
bogdanm 0:eff01767de02 1120 *p_ticks = rtc1_counter_get();
bogdanm 0:eff01767de02 1121 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1122 }
bogdanm 0:eff01767de02 1123
bogdanm 0:eff01767de02 1124
bogdanm 0:eff01767de02 1125 uint32_t app_timer_cnt_diff_compute(uint32_t ticks_to,
bogdanm 0:eff01767de02 1126 uint32_t ticks_from,
bogdanm 0:eff01767de02 1127 uint32_t * p_ticks_diff)
bogdanm 0:eff01767de02 1128 {
bogdanm 0:eff01767de02 1129 *p_ticks_diff = ticks_diff_get(ticks_to, ticks_from);
bogdanm 0:eff01767de02 1130 return NRF_SUCCESS;
bogdanm 0:eff01767de02 1131 }