mbed-os
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events/equeue/equeue_mbed.cpp@0:b74591d5ab33, 2017-12-11 (annotated)
- Committer:
- be_bryan
- Date:
- Mon Dec 11 17:54:04 2017 +0000
- Revision:
- 0:b74591d5ab33
motor ++
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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be_bryan | 0:b74591d5ab33 | 1 | /* |
be_bryan | 0:b74591d5ab33 | 2 | * Implementation for the mbed library |
be_bryan | 0:b74591d5ab33 | 3 | * https://github.com/mbedmicro/mbed |
be_bryan | 0:b74591d5ab33 | 4 | * |
be_bryan | 0:b74591d5ab33 | 5 | * Copyright (c) 2016 Christopher Haster |
be_bryan | 0:b74591d5ab33 | 6 | * |
be_bryan | 0:b74591d5ab33 | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
be_bryan | 0:b74591d5ab33 | 8 | * you may not use this file except in compliance with the License. |
be_bryan | 0:b74591d5ab33 | 9 | * You may obtain a copy of the License at |
be_bryan | 0:b74591d5ab33 | 10 | * |
be_bryan | 0:b74591d5ab33 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
be_bryan | 0:b74591d5ab33 | 12 | * |
be_bryan | 0:b74591d5ab33 | 13 | * Unless required by applicable law or agreed to in writing, software |
be_bryan | 0:b74591d5ab33 | 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
be_bryan | 0:b74591d5ab33 | 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
be_bryan | 0:b74591d5ab33 | 16 | * See the License for the specific language governing permissions and |
be_bryan | 0:b74591d5ab33 | 17 | * limitations under the License. |
be_bryan | 0:b74591d5ab33 | 18 | */ |
be_bryan | 0:b74591d5ab33 | 19 | #include "equeue/equeue_platform.h" |
be_bryan | 0:b74591d5ab33 | 20 | |
be_bryan | 0:b74591d5ab33 | 21 | #if defined(EQUEUE_PLATFORM_MBED) |
be_bryan | 0:b74591d5ab33 | 22 | |
be_bryan | 0:b74591d5ab33 | 23 | #include <stdbool.h> |
be_bryan | 0:b74591d5ab33 | 24 | #include "mbed.h" |
be_bryan | 0:b74591d5ab33 | 25 | |
be_bryan | 0:b74591d5ab33 | 26 | #if MBED_CONF_EVENTS_USE_LOWPOWER_TIMER_TICKER |
be_bryan | 0:b74591d5ab33 | 27 | #define ALIAS_TIMER LowPowerTimer |
be_bryan | 0:b74591d5ab33 | 28 | #define ALIAS_TICKER LowPowerTicker |
be_bryan | 0:b74591d5ab33 | 29 | #define ALIAS_TIMEOUT LowPowerTimeout |
be_bryan | 0:b74591d5ab33 | 30 | #else |
be_bryan | 0:b74591d5ab33 | 31 | #define ALIAS_TIMER Timer |
be_bryan | 0:b74591d5ab33 | 32 | #define ALIAS_TICKER Ticker |
be_bryan | 0:b74591d5ab33 | 33 | #define ALIAS_TIMEOUT Timeout |
be_bryan | 0:b74591d5ab33 | 34 | #endif |
be_bryan | 0:b74591d5ab33 | 35 | |
be_bryan | 0:b74591d5ab33 | 36 | // Ticker operations |
be_bryan | 0:b74591d5ab33 | 37 | static bool equeue_tick_inited = false; |
be_bryan | 0:b74591d5ab33 | 38 | static volatile unsigned equeue_minutes = 0; |
be_bryan | 0:b74591d5ab33 | 39 | static unsigned equeue_timer[ |
be_bryan | 0:b74591d5ab33 | 40 | (sizeof(ALIAS_TIMER)+sizeof(unsigned)-1)/sizeof(unsigned)]; |
be_bryan | 0:b74591d5ab33 | 41 | static unsigned equeue_ticker[ |
be_bryan | 0:b74591d5ab33 | 42 | (sizeof(ALIAS_TICKER)+sizeof(unsigned)-1)/sizeof(unsigned)]; |
be_bryan | 0:b74591d5ab33 | 43 | |
be_bryan | 0:b74591d5ab33 | 44 | static void equeue_tick_update() { |
be_bryan | 0:b74591d5ab33 | 45 | equeue_minutes += reinterpret_cast<ALIAS_TIMER*>(equeue_timer)->read_ms(); |
be_bryan | 0:b74591d5ab33 | 46 | reinterpret_cast<ALIAS_TIMER*>(equeue_timer)->reset(); |
be_bryan | 0:b74591d5ab33 | 47 | } |
be_bryan | 0:b74591d5ab33 | 48 | |
be_bryan | 0:b74591d5ab33 | 49 | static void equeue_tick_init() { |
be_bryan | 0:b74591d5ab33 | 50 | MBED_STATIC_ASSERT(sizeof(equeue_timer) >= sizeof(ALIAS_TIMER), |
be_bryan | 0:b74591d5ab33 | 51 | "The equeue_timer buffer must fit the class Timer"); |
be_bryan | 0:b74591d5ab33 | 52 | MBED_STATIC_ASSERT(sizeof(equeue_ticker) >= sizeof(ALIAS_TICKER), |
be_bryan | 0:b74591d5ab33 | 53 | "The equeue_ticker buffer must fit the class Ticker"); |
be_bryan | 0:b74591d5ab33 | 54 | ALIAS_TIMER *timer = new (equeue_timer) ALIAS_TIMER; |
be_bryan | 0:b74591d5ab33 | 55 | ALIAS_TICKER *ticker = new (equeue_ticker) ALIAS_TICKER; |
be_bryan | 0:b74591d5ab33 | 56 | |
be_bryan | 0:b74591d5ab33 | 57 | equeue_minutes = 0; |
be_bryan | 0:b74591d5ab33 | 58 | timer->start(); |
be_bryan | 0:b74591d5ab33 | 59 | ticker->attach_us(equeue_tick_update, 1000 << 16); |
be_bryan | 0:b74591d5ab33 | 60 | |
be_bryan | 0:b74591d5ab33 | 61 | equeue_tick_inited = true; |
be_bryan | 0:b74591d5ab33 | 62 | } |
be_bryan | 0:b74591d5ab33 | 63 | |
be_bryan | 0:b74591d5ab33 | 64 | unsigned equeue_tick() { |
be_bryan | 0:b74591d5ab33 | 65 | if (!equeue_tick_inited) { |
be_bryan | 0:b74591d5ab33 | 66 | equeue_tick_init(); |
be_bryan | 0:b74591d5ab33 | 67 | } |
be_bryan | 0:b74591d5ab33 | 68 | |
be_bryan | 0:b74591d5ab33 | 69 | unsigned minutes; |
be_bryan | 0:b74591d5ab33 | 70 | unsigned ms; |
be_bryan | 0:b74591d5ab33 | 71 | |
be_bryan | 0:b74591d5ab33 | 72 | do { |
be_bryan | 0:b74591d5ab33 | 73 | minutes = equeue_minutes; |
be_bryan | 0:b74591d5ab33 | 74 | ms = reinterpret_cast<ALIAS_TIMER*>(equeue_timer)->read_ms(); |
be_bryan | 0:b74591d5ab33 | 75 | } while (minutes != equeue_minutes); |
be_bryan | 0:b74591d5ab33 | 76 | |
be_bryan | 0:b74591d5ab33 | 77 | return minutes + ms; |
be_bryan | 0:b74591d5ab33 | 78 | } |
be_bryan | 0:b74591d5ab33 | 79 | |
be_bryan | 0:b74591d5ab33 | 80 | |
be_bryan | 0:b74591d5ab33 | 81 | // Mutex operations |
be_bryan | 0:b74591d5ab33 | 82 | int equeue_mutex_create(equeue_mutex_t *m) { return 0; } |
be_bryan | 0:b74591d5ab33 | 83 | void equeue_mutex_destroy(equeue_mutex_t *m) { } |
be_bryan | 0:b74591d5ab33 | 84 | |
be_bryan | 0:b74591d5ab33 | 85 | void equeue_mutex_lock(equeue_mutex_t *m) { |
be_bryan | 0:b74591d5ab33 | 86 | core_util_critical_section_enter(); |
be_bryan | 0:b74591d5ab33 | 87 | } |
be_bryan | 0:b74591d5ab33 | 88 | |
be_bryan | 0:b74591d5ab33 | 89 | void equeue_mutex_unlock(equeue_mutex_t *m) { |
be_bryan | 0:b74591d5ab33 | 90 | core_util_critical_section_exit(); |
be_bryan | 0:b74591d5ab33 | 91 | } |
be_bryan | 0:b74591d5ab33 | 92 | |
be_bryan | 0:b74591d5ab33 | 93 | |
be_bryan | 0:b74591d5ab33 | 94 | // Semaphore operations |
be_bryan | 0:b74591d5ab33 | 95 | #ifdef MBED_CONF_RTOS_PRESENT |
be_bryan | 0:b74591d5ab33 | 96 | |
be_bryan | 0:b74591d5ab33 | 97 | int equeue_sema_create(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 98 | osEventFlagsAttr_t attr; |
be_bryan | 0:b74591d5ab33 | 99 | memset(&attr, 0, sizeof(attr)); |
be_bryan | 0:b74591d5ab33 | 100 | attr.cb_mem = &s->mem; |
be_bryan | 0:b74591d5ab33 | 101 | attr.cb_size = sizeof(s->mem); |
be_bryan | 0:b74591d5ab33 | 102 | |
be_bryan | 0:b74591d5ab33 | 103 | s->id = osEventFlagsNew(&attr); |
be_bryan | 0:b74591d5ab33 | 104 | return !s->id ? -1 : 0; |
be_bryan | 0:b74591d5ab33 | 105 | } |
be_bryan | 0:b74591d5ab33 | 106 | |
be_bryan | 0:b74591d5ab33 | 107 | void equeue_sema_destroy(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 108 | osEventFlagsDelete(s->id); |
be_bryan | 0:b74591d5ab33 | 109 | } |
be_bryan | 0:b74591d5ab33 | 110 | |
be_bryan | 0:b74591d5ab33 | 111 | void equeue_sema_signal(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 112 | osEventFlagsSet(s->id, 1); |
be_bryan | 0:b74591d5ab33 | 113 | } |
be_bryan | 0:b74591d5ab33 | 114 | |
be_bryan | 0:b74591d5ab33 | 115 | bool equeue_sema_wait(equeue_sema_t *s, int ms) { |
be_bryan | 0:b74591d5ab33 | 116 | if (ms < 0) { |
be_bryan | 0:b74591d5ab33 | 117 | ms = osWaitForever; |
be_bryan | 0:b74591d5ab33 | 118 | } |
be_bryan | 0:b74591d5ab33 | 119 | |
be_bryan | 0:b74591d5ab33 | 120 | return (osEventFlagsWait(s->id, 1, osFlagsWaitAny, ms) == 1); |
be_bryan | 0:b74591d5ab33 | 121 | } |
be_bryan | 0:b74591d5ab33 | 122 | |
be_bryan | 0:b74591d5ab33 | 123 | #else |
be_bryan | 0:b74591d5ab33 | 124 | |
be_bryan | 0:b74591d5ab33 | 125 | // Semaphore operations |
be_bryan | 0:b74591d5ab33 | 126 | int equeue_sema_create(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 127 | *s = false; |
be_bryan | 0:b74591d5ab33 | 128 | return 0; |
be_bryan | 0:b74591d5ab33 | 129 | } |
be_bryan | 0:b74591d5ab33 | 130 | |
be_bryan | 0:b74591d5ab33 | 131 | void equeue_sema_destroy(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 132 | } |
be_bryan | 0:b74591d5ab33 | 133 | |
be_bryan | 0:b74591d5ab33 | 134 | void equeue_sema_signal(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 135 | *s = 1; |
be_bryan | 0:b74591d5ab33 | 136 | } |
be_bryan | 0:b74591d5ab33 | 137 | |
be_bryan | 0:b74591d5ab33 | 138 | static void equeue_sema_timeout(equeue_sema_t *s) { |
be_bryan | 0:b74591d5ab33 | 139 | *s = -1; |
be_bryan | 0:b74591d5ab33 | 140 | } |
be_bryan | 0:b74591d5ab33 | 141 | |
be_bryan | 0:b74591d5ab33 | 142 | bool equeue_sema_wait(equeue_sema_t *s, int ms) { |
be_bryan | 0:b74591d5ab33 | 143 | int signal = 0; |
be_bryan | 0:b74591d5ab33 | 144 | ALIAS_TIMEOUT timeout; |
be_bryan | 0:b74591d5ab33 | 145 | if (ms == 0) { |
be_bryan | 0:b74591d5ab33 | 146 | return false; |
be_bryan | 0:b74591d5ab33 | 147 | } else if (ms > 0) { |
be_bryan | 0:b74591d5ab33 | 148 | timeout.attach_us(callback(equeue_sema_timeout, s), ms*1000); |
be_bryan | 0:b74591d5ab33 | 149 | } |
be_bryan | 0:b74591d5ab33 | 150 | |
be_bryan | 0:b74591d5ab33 | 151 | core_util_critical_section_enter(); |
be_bryan | 0:b74591d5ab33 | 152 | while (!*s) { |
be_bryan | 0:b74591d5ab33 | 153 | sleep(); |
be_bryan | 0:b74591d5ab33 | 154 | core_util_critical_section_exit(); |
be_bryan | 0:b74591d5ab33 | 155 | core_util_critical_section_enter(); |
be_bryan | 0:b74591d5ab33 | 156 | } |
be_bryan | 0:b74591d5ab33 | 157 | |
be_bryan | 0:b74591d5ab33 | 158 | signal = *s; |
be_bryan | 0:b74591d5ab33 | 159 | *s = false; |
be_bryan | 0:b74591d5ab33 | 160 | core_util_critical_section_exit(); |
be_bryan | 0:b74591d5ab33 | 161 | |
be_bryan | 0:b74591d5ab33 | 162 | return (signal > 0); |
be_bryan | 0:b74591d5ab33 | 163 | } |
be_bryan | 0:b74591d5ab33 | 164 | |
be_bryan | 0:b74591d5ab33 | 165 | #endif |
be_bryan | 0:b74591d5ab33 | 166 | |
be_bryan | 0:b74591d5ab33 | 167 | #endif |