Takaaki Numai / mbed-dev

inport from local

Dependents:   Hobbyking_Cheetah_0511

targets/TARGET_STM/lp_ticker.c@0:85b3fd62ea1a, 2020-03-16 (annotated)

Committer:
NYX
Date:
Mon Mar 16 06:35:48 2020 +0000
Revision:
0:85b3fd62ea1a
reinport to mbed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NYX 0:85b3fd62ea1a 1 /* mbed Microcontroller Library
NYX 0:85b3fd62ea1a 2 *******************************************************************************
NYX 0:85b3fd62ea1a 3 * Copyright (c) 2016, STMicroelectronics
NYX 0:85b3fd62ea1a 4 * All rights reserved.
NYX 0:85b3fd62ea1a 5 *
NYX 0:85b3fd62ea1a 6 * Redistribution and use in source and binary forms, with or without
NYX 0:85b3fd62ea1a 7 * modification, are permitted provided that the following conditions are met:
NYX 0:85b3fd62ea1a 8 *
NYX 0:85b3fd62ea1a 9 * 1. Redistributions of source code must retain the above copyright notice,
NYX 0:85b3fd62ea1a 10 * this list of conditions and the following disclaimer.
NYX 0:85b3fd62ea1a 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
NYX 0:85b3fd62ea1a 12 * this list of conditions and the following disclaimer in the documentation
NYX 0:85b3fd62ea1a 13 * and/or other materials provided with the distribution.
NYX 0:85b3fd62ea1a 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
NYX 0:85b3fd62ea1a 15 * may be used to endorse or promote products derived from this software
NYX 0:85b3fd62ea1a 16 * without specific prior written permission.
NYX 0:85b3fd62ea1a 17 *
NYX 0:85b3fd62ea1a 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
NYX 0:85b3fd62ea1a 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
NYX 0:85b3fd62ea1a 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
NYX 0:85b3fd62ea1a 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
NYX 0:85b3fd62ea1a 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
NYX 0:85b3fd62ea1a 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
NYX 0:85b3fd62ea1a 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
NYX 0:85b3fd62ea1a 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
NYX 0:85b3fd62ea1a 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
NYX 0:85b3fd62ea1a 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
NYX 0:85b3fd62ea1a 28 *******************************************************************************
NYX 0:85b3fd62ea1a 29 */
NYX 0:85b3fd62ea1a 30 #include "device.h"
NYX 0:85b3fd62ea1a 31
NYX 0:85b3fd62ea1a 32 #if DEVICE_LOWPOWERTIMER
NYX 0:85b3fd62ea1a 33
NYX 0:85b3fd62ea1a 34 #include "ticker_api.h"
NYX 0:85b3fd62ea1a 35 #include "lp_ticker_api.h"
NYX 0:85b3fd62ea1a 36 #include "rtc_api.h"
NYX 0:85b3fd62ea1a 37 #include "rtc_api_hal.h"
NYX 0:85b3fd62ea1a 38
NYX 0:85b3fd62ea1a 39 static uint8_t lp_ticker_inited = 0;
NYX 0:85b3fd62ea1a 40
NYX 0:85b3fd62ea1a 41 void lp_ticker_init(void)
NYX 0:85b3fd62ea1a 42 {
NYX 0:85b3fd62ea1a 43 if (lp_ticker_inited) return;
NYX 0:85b3fd62ea1a 44 lp_ticker_inited = 1;
NYX 0:85b3fd62ea1a 45
NYX 0:85b3fd62ea1a 46 rtc_init();
NYX 0:85b3fd62ea1a 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
NYX 0:85b3fd62ea1a 48 }
NYX 0:85b3fd62ea1a 49
NYX 0:85b3fd62ea1a 50 uint32_t lp_ticker_read(void)
NYX 0:85b3fd62ea1a 51 {
NYX 0:85b3fd62ea1a 52 uint32_t usecs = 0;
NYX 0:85b3fd62ea1a 53 time_t time = 0;
NYX 0:85b3fd62ea1a 54
NYX 0:85b3fd62ea1a 55 lp_ticker_init();
NYX 0:85b3fd62ea1a 56
NYX 0:85b3fd62ea1a 57 do {
NYX 0:85b3fd62ea1a 58 time = rtc_read();
NYX 0:85b3fd62ea1a 59 usecs = rtc_read_subseconds();
NYX 0:85b3fd62ea1a 60 } while (time != rtc_read());
NYX 0:85b3fd62ea1a 61
NYX 0:85b3fd62ea1a 62 return (time * 1000000) + usecs;
NYX 0:85b3fd62ea1a 63 }
NYX 0:85b3fd62ea1a 64
NYX 0:85b3fd62ea1a 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
NYX 0:85b3fd62ea1a 66 {
NYX 0:85b3fd62ea1a 67 uint32_t delta;
NYX 0:85b3fd62ea1a 68
NYX 0:85b3fd62ea1a 69 delta = timestamp - lp_ticker_read();
NYX 0:85b3fd62ea1a 70 rtc_set_wake_up_timer(delta);
NYX 0:85b3fd62ea1a 71 }
NYX 0:85b3fd62ea1a 72
NYX 0:85b3fd62ea1a 73 void lp_ticker_fire_interrupt(void)
NYX 0:85b3fd62ea1a 74 {
NYX 0:85b3fd62ea1a 75 NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
NYX 0:85b3fd62ea1a 76 }
NYX 0:85b3fd62ea1a 77
NYX 0:85b3fd62ea1a 78 void lp_ticker_disable_interrupt(void)
NYX 0:85b3fd62ea1a 79 {
NYX 0:85b3fd62ea1a 80 rtc_deactivate_wake_up_timer();
NYX 0:85b3fd62ea1a 81 }
NYX 0:85b3fd62ea1a 82
NYX 0:85b3fd62ea1a 83 void lp_ticker_clear_interrupt(void)
NYX 0:85b3fd62ea1a 84 {
NYX 0:85b3fd62ea1a 85
NYX 0:85b3fd62ea1a 86 }
NYX 0:85b3fd62ea1a 87
NYX 0:85b3fd62ea1a 88 #endif