erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

events/equeue/equeue_mbed.cpp@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /*
elessair 0:f269e3021894 2 * Implementation for the mbed library
elessair 0:f269e3021894 3 * https://github.com/mbedmicro/mbed
elessair 0:f269e3021894 4 *
elessair 0:f269e3021894 5 * Copyright (c) 2016 Christopher Haster
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 8 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 */
elessair 0:f269e3021894 19 #include "equeue/equeue_platform.h"
elessair 0:f269e3021894 20
elessair 0:f269e3021894 21 #if defined(EQUEUE_PLATFORM_MBED)
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 #include <stdbool.h>
elessair 0:f269e3021894 24 #include "mbed.h"
elessair 0:f269e3021894 25
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 // Ticker operations
elessair 0:f269e3021894 28 static bool equeue_tick_inited = false;
elessair 0:f269e3021894 29 static unsigned equeue_minutes = 0;
elessair 0:f269e3021894 30 static unsigned equeue_timer[
elessair 0:f269e3021894 31 (sizeof(Timer)+sizeof(unsigned)-1)/sizeof(unsigned)];
elessair 0:f269e3021894 32 static unsigned equeue_ticker[
elessair 0:f269e3021894 33 (sizeof(Ticker)+sizeof(unsigned)-1)/sizeof(unsigned)];
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 static void equeue_tick_update() {
elessair 0:f269e3021894 36 reinterpret_cast<Timer*>(equeue_timer)->reset();
elessair 0:f269e3021894 37 equeue_minutes += 1;
elessair 0:f269e3021894 38 }
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 static void equeue_tick_init() {
elessair 0:f269e3021894 41 MBED_ASSERT(sizeof(equeue_timer) >= sizeof(Timer));
elessair 0:f269e3021894 42 MBED_ASSERT(sizeof(equeue_ticker) >= sizeof(Ticker));
elessair 0:f269e3021894 43 new (equeue_timer) Timer;
elessair 0:f269e3021894 44 new (equeue_ticker) Ticker;
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 equeue_minutes = 0;
elessair 0:f269e3021894 47 reinterpret_cast<Timer*>(equeue_timer)->start();
elessair 0:f269e3021894 48 reinterpret_cast<Ticker*>(equeue_ticker)
elessair 0:f269e3021894 49 ->attach_us(equeue_tick_update, (1 << 16)*1000);
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 equeue_tick_inited = true;
elessair 0:f269e3021894 52 }
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 unsigned equeue_tick() {
elessair 0:f269e3021894 55 if (!equeue_tick_inited) {
elessair 0:f269e3021894 56 equeue_tick_init();
elessair 0:f269e3021894 57 }
elessair 0:f269e3021894 58
elessair 0:f269e3021894 59 unsigned equeue_ms = reinterpret_cast<Timer*>(equeue_timer)->read_ms();
elessair 0:f269e3021894 60 return (equeue_minutes << 16) + equeue_ms;
elessair 0:f269e3021894 61 }
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63
elessair 0:f269e3021894 64 // Mutex operations
elessair 0:f269e3021894 65 int equeue_mutex_create(equeue_mutex_t *m) { return 0; }
elessair 0:f269e3021894 66 void equeue_mutex_destroy(equeue_mutex_t *m) { }
elessair 0:f269e3021894 67
elessair 0:f269e3021894 68 void equeue_mutex_lock(equeue_mutex_t *m) {
elessair 0:f269e3021894 69 core_util_critical_section_enter();
elessair 0:f269e3021894 70 }
elessair 0:f269e3021894 71
elessair 0:f269e3021894 72 void equeue_mutex_unlock(equeue_mutex_t *m) {
elessair 0:f269e3021894 73 core_util_critical_section_exit();
elessair 0:f269e3021894 74 }
elessair 0:f269e3021894 75
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 // Semaphore operations
elessair 0:f269e3021894 78 #ifdef MBED_CONF_RTOS_PRESENT
elessair 0:f269e3021894 79
elessair 0:f269e3021894 80 int equeue_sema_create(equeue_sema_t *s) {
elessair 0:f269e3021894 81 MBED_ASSERT(sizeof(equeue_sema_t) >= sizeof(Semaphore));
elessair 0:f269e3021894 82 new (s) Semaphore(0);
elessair 0:f269e3021894 83 return 0;
elessair 0:f269e3021894 84 }
elessair 0:f269e3021894 85
elessair 0:f269e3021894 86 void equeue_sema_destroy(equeue_sema_t *s) {
elessair 0:f269e3021894 87 reinterpret_cast<Semaphore*>(s)->~Semaphore();
elessair 0:f269e3021894 88 }
elessair 0:f269e3021894 89
elessair 0:f269e3021894 90 void equeue_sema_signal(equeue_sema_t *s) {
elessair 0:f269e3021894 91 reinterpret_cast<Semaphore*>(s)->release();
elessair 0:f269e3021894 92 }
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 bool equeue_sema_wait(equeue_sema_t *s, int ms) {
elessair 0:f269e3021894 95 if (ms < 0) {
elessair 0:f269e3021894 96 ms = osWaitForever;
elessair 0:f269e3021894 97 }
elessair 0:f269e3021894 98
elessair 0:f269e3021894 99 return (reinterpret_cast<Semaphore*>(s)->wait(ms) > 0);
elessair 0:f269e3021894 100 }
elessair 0:f269e3021894 101
elessair 0:f269e3021894 102 #else
elessair 0:f269e3021894 103
elessair 0:f269e3021894 104 // Semaphore operations
elessair 0:f269e3021894 105 int equeue_sema_create(equeue_sema_t *s) {
elessair 0:f269e3021894 106 *s = false;
elessair 0:f269e3021894 107 return 0;
elessair 0:f269e3021894 108 }
elessair 0:f269e3021894 109
elessair 0:f269e3021894 110 void equeue_sema_destroy(equeue_sema_t *s) {
elessair 0:f269e3021894 111 }
elessair 0:f269e3021894 112
elessair 0:f269e3021894 113 void equeue_sema_signal(equeue_sema_t *s) {
elessair 0:f269e3021894 114 *s = 1;
elessair 0:f269e3021894 115 }
elessair 0:f269e3021894 116
elessair 0:f269e3021894 117 static void equeue_sema_timeout(equeue_sema_t *s) {
elessair 0:f269e3021894 118 *s = -1;
elessair 0:f269e3021894 119 }
elessair 0:f269e3021894 120
elessair 0:f269e3021894 121 bool equeue_sema_wait(equeue_sema_t *s, int ms) {
elessair 0:f269e3021894 122 int signal = 0;
elessair 0:f269e3021894 123 Timeout timeout;
elessair 0:f269e3021894 124 timeout.attach_us(s, equeue_sema_timeout, ms*1000);
elessair 0:f269e3021894 125
elessair 0:f269e3021894 126 core_util_critical_section_enter();
elessair 0:f269e3021894 127 while (!*s) {
elessair 0:f269e3021894 128 sleep();
elessair 0:f269e3021894 129 core_util_critical_section_exit();
elessair 0:f269e3021894 130 core_util_critical_section_enter();
elessair 0:f269e3021894 131 }
elessair 0:f269e3021894 132
elessair 0:f269e3021894 133 signal = *s;
elessair 0:f269e3021894 134 *s = false;
elessair 0:f269e3021894 135 core_util_critical_section_exit();
elessair 0:f269e3021894 136
elessair 0:f269e3021894 137 return (signal > 0);
elessair 0:f269e3021894 138 }
elessair 0:f269e3021894 139
elessair 0:f269e3021894 140 #endif
elessair 0:f269e3021894 141
elessair 0:f269e3021894 142 #endif