Kev Mann / mbed-dev-OS5_10_4

RTC auf true

rtos/Kernel.cpp@2:7aab896b1a3b, 2019-03-13 (annotated)

Committer:
kevman
Date:
Wed Mar 13 11:03:24 2019 +0000
Revision:
2:7aab896b1a3b
Parent:
0:38ceb79fef03 
2019-03-13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2017 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kevman 0:38ceb79fef03 5 * of this software and associated documentation files (the "Software"), to deal
kevman 0:38ceb79fef03 6 * in the Software without restriction, including without limitation the rights
kevman 0:38ceb79fef03 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kevman 0:38ceb79fef03 8 * copies of the Software, and to permit persons to whom the Software is
kevman 0:38ceb79fef03 9 * furnished to do so, subject to the following conditions:
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * The above copyright notice and this permission notice shall be included in
kevman 0:38ceb79fef03 12 * all copies or substantial portions of the Software.
kevman 0:38ceb79fef03 13 *
kevman 0:38ceb79fef03 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kevman 0:38ceb79fef03 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kevman 0:38ceb79fef03 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kevman 0:38ceb79fef03 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kevman 0:38ceb79fef03 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kevman 0:38ceb79fef03 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kevman 0:38ceb79fef03 20 * SOFTWARE.
kevman 0:38ceb79fef03 21 */
kevman 0:38ceb79fef03 22
kevman 0:38ceb79fef03 23 #include "rtos/Kernel.h"
kevman 0:38ceb79fef03 24
kevman 0:38ceb79fef03 25 #include "mbed.h"
kevman 0:38ceb79fef03 26 #include "rtos/rtos_idle.h"
kevman 0:38ceb79fef03 27 #include "rtos/rtos_handlers.h"
kevman 0:38ceb79fef03 28
kevman 0:38ceb79fef03 29 namespace rtos {
kevman 0:38ceb79fef03 30
kevman 0:38ceb79fef03 31 uint64_t Kernel::get_ms_count()
kevman 0:38ceb79fef03 32 {
kevman 0:38ceb79fef03 33 // CMSIS-RTOS 2.1.0 and 2.1.1 differ in the time type. We assume
kevman 0:38ceb79fef03 34 // our header at least matches the implementation, so we don't try looking
kevman 0:38ceb79fef03 35 // at the run-time version report. (There's no compile-time version report)
kevman 0:38ceb79fef03 36
kevman 0:38ceb79fef03 37 // 2.1.0 uint64_t osKernelGetTickCount(void), not documented as callable from ISR (but RTX does allow)
kevman 0:38ceb79fef03 38 // 2.1.1 uint32_t osKernelGetTickCount(void), callable from ISR
kevman 0:38ceb79fef03 39 // 2.1.x who knows? We assume could go back to uint64_t
kevman 0:38ceb79fef03 40 if (sizeof osKernelGetTickCount() == sizeof(uint64_t)) {
kevman 0:38ceb79fef03 41 return osKernelGetTickCount();
kevman 0:38ceb79fef03 42 } else { /* assume 32-bit */
kevman 0:38ceb79fef03 43 // Based on suggestion in CMSIS-RTOS 2.1.1 docs, but with reentrancy
kevman 0:38ceb79fef03 44 // protection for the tick memory. We use critical section rather than a
kevman 0:38ceb79fef03 45 // mutex, as hopefully this method can be callable from interrupt later -
kevman 0:38ceb79fef03 46 // only thing currently preventing it is that pre CMSIS RTOS 2.1.1, it's
kevman 0:38ceb79fef03 47 // not defined as safe.
kevman 0:38ceb79fef03 48 // We assume this is called multiple times per 32-bit wrap period (49 days).
kevman 0:38ceb79fef03 49 static uint32_t tick_h, tick_l;
kevman 0:38ceb79fef03 50
kevman 0:38ceb79fef03 51 core_util_critical_section_enter();
kevman 0:38ceb79fef03 52 // The 2.1.1 API says this is legal from an ISR - we assume this means
kevman 0:38ceb79fef03 53 // it's also legal with interrupts disabled. RTX implementation kind
kevman 0:38ceb79fef03 54 // of conflates the two.
kevman 0:38ceb79fef03 55 uint32_t tick32 = osKernelGetTickCount();
kevman 0:38ceb79fef03 56 if (tick32 < tick_l) {
kevman 0:38ceb79fef03 57 tick_h++;
kevman 0:38ceb79fef03 58 }
kevman 0:38ceb79fef03 59 tick_l = tick32;
kevman 0:38ceb79fef03 60 uint64_t ret = ((uint64_t) tick_h << 32) | tick_l;
kevman 0:38ceb79fef03 61 core_util_critical_section_exit();
kevman 0:38ceb79fef03 62 return ret;
kevman 0:38ceb79fef03 63 }
kevman 0:38ceb79fef03 64 }
kevman 0:38ceb79fef03 65
kevman 0:38ceb79fef03 66 void Kernel::attach_idle_hook(void (*fptr)(void))
kevman 0:38ceb79fef03 67 {
kevman 0:38ceb79fef03 68 rtos_attach_idle_hook(fptr);
kevman 0:38ceb79fef03 69 }
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 void Kernel::attach_thread_terminate_hook(void (*fptr)(osThreadId_t id))
kevman 0:38ceb79fef03 72 {
kevman 0:38ceb79fef03 73 rtos_attach_thread_terminate_hook(fptr);
kevman 0:38ceb79fef03 74 }
kevman 0:38ceb79fef03 75
kevman 0:38ceb79fef03 76 }