Contiki-NG
rtimer-arch.c
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1 /*
2  * Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
3  *
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28  */
29 
30 /**
31  * \addtogroup nrf52832
32  * @{
33  *
34  * \file
35  * Implementation of the architecture dependent rtimer functions for the nRF52
36  *
37  * \author
38  * Wojciech Bober <wojciech.bober@nordicsemi.no>
39  */
40 /*---------------------------------------------------------------------------*/
41 #include <stdint.h>
42 #include <stddef.h>
43 #include "nrf.h"
44 #include "nrf_drv_timer.h"
45 #include "app_error.h"
46 #include "contiki.h"
47 
48 static const nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(PLATFORM_TIMER_INSTANCE_ID); /**< Timer instance used for rtimer */
49 
50 /**
51  * \brief Handler for timer events.
52  *
53  * \param event_type type of an event that should be handled
54  * \param p_context opaque data pointer passed from nrf_drv_timer_init()
55  */
56 static void
57 timer_event_handler(nrf_timer_event_t event_type, void* p_context)
58 {
59  switch (event_type) {
60  case NRF_TIMER_EVENT_COMPARE1:
62  break;
63 
64  default:
65  //Do nothing.
66  break;
67  }
68 }
69 /*---------------------------------------------------------------------------*/
70 /**
71  * \brief Initialize platform rtimer
72  */
73 void
75 {
76  ret_code_t err_code = nrf_drv_timer_init(&timer, NULL, timer_event_handler);
77  APP_ERROR_CHECK(err_code);
78  nrf_drv_timer_enable(&timer);
79 }
80 /*---------------------------------------------------------------------------*/
81 /**
82  * \brief Schedules an rtimer task to be triggered at time t
83  * \param t The time when the task will need executed.
84  *
85  * \e t is an absolute time, in other words the task will be executed AT
86  * time \e t, not IN \e t rtimer ticks.
87  *
88  * This function schedules a one-shot event with the nRF RTC.
89  */
90 void
91 rtimer_arch_schedule(rtimer_clock_t t)
92 {
93  nrf_drv_timer_compare(&timer, NRF_TIMER_CC_CHANNEL1, t, true);
94 }
95 /*---------------------------------------------------------------------------*/
96 /**
97  * \brief Returns the current real-time clock time
98  * \return The current rtimer time in ticks
99  *
100  */
101 rtimer_clock_t
103 {
104  return nrf_drv_timer_capture(&timer, NRF_TIMER_CC_CHANNEL0);
105 }
106 /*---------------------------------------------------------------------------*/
107 /**
108  * @}
109  */
rtimer_clock_t rtimer_arch_now()
Returns the current real-time clock time.
Definition: rtimer-arch.c:115
static void timer_event_handler(nrf_timer_event_t event_type, void *p_context)
Handler for timer events.
Definition: rtimer-arch.c:57
A timer.
Definition: timer.h:82
void rtimer_arch_schedule(rtimer_clock_t t)
Schedules an rtimer task to be triggered at time t.
Definition: rtimer-arch.c:71
void rtimer_arch_init(void)
We don&#39;t need to explicitly initialise anything but this routine is required by the API...
Definition: rtimer-arch.c:59
void rtimer_run_next(void)
Execute the next real-time task and schedule the next task, if any.
Definition: rtimer.c:92
#define PLATFORM_TIMER_INSTANCE_ID
nRF52 timer instance to be used for Contiki rtimer driver.
Definition: nrf52dk-def.h:109