takashi kadono / Mbed OS Nucleo_446

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Dependencies:   ssd1331

mbed-os/rtos/Kernel.cpp@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 /* mbed Microcontroller Library
kadonotakashi 0:8fdf9a60065b 2 * Copyright (c) 2017 ARM Limited
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kadonotakashi 0:8fdf9a60065b 5 * of this software and associated documentation files (the "Software"), to deal
kadonotakashi 0:8fdf9a60065b 6 * in the Software without restriction, including without limitation the rights
kadonotakashi 0:8fdf9a60065b 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kadonotakashi 0:8fdf9a60065b 8 * copies of the Software, and to permit persons to whom the Software is
kadonotakashi 0:8fdf9a60065b 9 * furnished to do so, subject to the following conditions:
kadonotakashi 0:8fdf9a60065b 10 *
kadonotakashi 0:8fdf9a60065b 11 * The above copyright notice and this permission notice shall be included in
kadonotakashi 0:8fdf9a60065b 12 * all copies or substantial portions of the Software.
kadonotakashi 0:8fdf9a60065b 13 *
kadonotakashi 0:8fdf9a60065b 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kadonotakashi 0:8fdf9a60065b 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kadonotakashi 0:8fdf9a60065b 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kadonotakashi 0:8fdf9a60065b 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kadonotakashi 0:8fdf9a60065b 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kadonotakashi 0:8fdf9a60065b 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kadonotakashi 0:8fdf9a60065b 20 * SOFTWARE.
kadonotakashi 0:8fdf9a60065b 21 */
kadonotakashi 0:8fdf9a60065b 22
kadonotakashi 0:8fdf9a60065b 23 #include "rtos/Kernel.h"
kadonotakashi 0:8fdf9a60065b 24
kadonotakashi 0:8fdf9a60065b 25 #include "mbed.h"
kadonotakashi 0:8fdf9a60065b 26 #include "rtos/rtos_idle.h"
kadonotakashi 0:8fdf9a60065b 27 #include "rtos/rtos_handlers.h"
kadonotakashi 0:8fdf9a60065b 28
kadonotakashi 0:8fdf9a60065b 29 namespace rtos {
kadonotakashi 0:8fdf9a60065b 30
kadonotakashi 0:8fdf9a60065b 31 uint64_t Kernel::get_ms_count()
kadonotakashi 0:8fdf9a60065b 32 {
kadonotakashi 0:8fdf9a60065b 33 // CMSIS-RTOS 2.1.0 and 2.1.1 differ in the time type. We assume
kadonotakashi 0:8fdf9a60065b 34 // our header at least matches the implementation, so we don't try looking
kadonotakashi 0:8fdf9a60065b 35 // at the run-time version report. (There's no compile-time version report)
kadonotakashi 0:8fdf9a60065b 36
kadonotakashi 0:8fdf9a60065b 37 // 2.1.0 uint64_t osKernelGetTickCount(void), not documented as callable from ISR (but RTX does allow)
kadonotakashi 0:8fdf9a60065b 38 // 2.1.1 uint32_t osKernelGetTickCount(void), callable from ISR
kadonotakashi 0:8fdf9a60065b 39 // 2.1.x who knows? We assume could go back to uint64_t
kadonotakashi 0:8fdf9a60065b 40 if (sizeof osKernelGetTickCount() == sizeof(uint64_t)) {
kadonotakashi 0:8fdf9a60065b 41 return osKernelGetTickCount();
kadonotakashi 0:8fdf9a60065b 42 } else { /* assume 32-bit */
kadonotakashi 0:8fdf9a60065b 43 // Based on suggestion in CMSIS-RTOS 2.1.1 docs, but with reentrancy
kadonotakashi 0:8fdf9a60065b 44 // protection for the tick memory. We use critical section rather than a
kadonotakashi 0:8fdf9a60065b 45 // mutex, as hopefully this method can be callable from interrupt later -
kadonotakashi 0:8fdf9a60065b 46 // only thing currently preventing it is that pre CMSIS RTOS 2.1.1, it's
kadonotakashi 0:8fdf9a60065b 47 // not defined as safe.
kadonotakashi 0:8fdf9a60065b 48 // We assume this is called multiple times per 32-bit wrap period (49 days).
kadonotakashi 0:8fdf9a60065b 49 static uint32_t tick_h, tick_l;
kadonotakashi 0:8fdf9a60065b 50
kadonotakashi 0:8fdf9a60065b 51 core_util_critical_section_enter();
kadonotakashi 0:8fdf9a60065b 52 // The 2.1.1 API says this is legal from an ISR - we assume this means
kadonotakashi 0:8fdf9a60065b 53 // it's also legal with interrupts disabled. RTX implementation kind
kadonotakashi 0:8fdf9a60065b 54 // of conflates the two.
kadonotakashi 0:8fdf9a60065b 55 uint32_t tick32 = osKernelGetTickCount();
kadonotakashi 0:8fdf9a60065b 56 if (tick32 < tick_l) {
kadonotakashi 0:8fdf9a60065b 57 tick_h++;
kadonotakashi 0:8fdf9a60065b 58 }
kadonotakashi 0:8fdf9a60065b 59 tick_l = tick32;
kadonotakashi 0:8fdf9a60065b 60 uint64_t ret = ((uint64_t) tick_h << 32) | tick_l;
kadonotakashi 0:8fdf9a60065b 61 core_util_critical_section_exit();
kadonotakashi 0:8fdf9a60065b 62 return ret;
kadonotakashi 0:8fdf9a60065b 63 }
kadonotakashi 0:8fdf9a60065b 64 }
kadonotakashi 0:8fdf9a60065b 65
kadonotakashi 0:8fdf9a60065b 66 void Kernel::attach_idle_hook(void (*fptr)(void))
kadonotakashi 0:8fdf9a60065b 67 {
kadonotakashi 0:8fdf9a60065b 68 rtos_attach_idle_hook(fptr);
kadonotakashi 0:8fdf9a60065b 69 }
kadonotakashi 0:8fdf9a60065b 70
kadonotakashi 0:8fdf9a60065b 71 void Kernel::attach_thread_terminate_hook(void (*fptr)(osThreadId_t id))
kadonotakashi 0:8fdf9a60065b 72 {
kadonotakashi 0:8fdf9a60065b 73 rtos_attach_thread_terminate_hook(fptr);
kadonotakashi 0:8fdf9a60065b 74 }
kadonotakashi 0:8fdf9a60065b 75
kadonotakashi 0:8fdf9a60065b 76 }