Gan likun / The prosthetic control

The prosthetic control（MIT）

targets/TARGET_STM/lp_ticker.c@0:20e0c61e0684, 2022-06-23 (annotated)

Committer:
ganlikun
Date:
Thu Jun 23 05:23:34 2022 +0000
Revision:
0:20e0c61e0684
01

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:20e0c61e0684 1 /* mbed Microcontroller Library
ganlikun 0:20e0c61e0684 2 *******************************************************************************
ganlikun 0:20e0c61e0684 3 * Copyright (c) 2016, STMicroelectronics
ganlikun 0:20e0c61e0684 4 * All rights reserved.
ganlikun 0:20e0c61e0684 5 *
ganlikun 0:20e0c61e0684 6 * Redistribution and use in source and binary forms, with or without
ganlikun 0:20e0c61e0684 7 * modification, are permitted provided that the following conditions are met:
ganlikun 0:20e0c61e0684 8 *
ganlikun 0:20e0c61e0684 9 * 1. Redistributions of source code must retain the above copyright notice,
ganlikun 0:20e0c61e0684 10 * this list of conditions and the following disclaimer.
ganlikun 0:20e0c61e0684 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ganlikun 0:20e0c61e0684 12 * this list of conditions and the following disclaimer in the documentation
ganlikun 0:20e0c61e0684 13 * and/or other materials provided with the distribution.
ganlikun 0:20e0c61e0684 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ganlikun 0:20e0c61e0684 15 * may be used to endorse or promote products derived from this software
ganlikun 0:20e0c61e0684 16 * without specific prior written permission.
ganlikun 0:20e0c61e0684 17 *
ganlikun 0:20e0c61e0684 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ganlikun 0:20e0c61e0684 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ganlikun 0:20e0c61e0684 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ganlikun 0:20e0c61e0684 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ganlikun 0:20e0c61e0684 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ganlikun 0:20e0c61e0684 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ganlikun 0:20e0c61e0684 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ganlikun 0:20e0c61e0684 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ganlikun 0:20e0c61e0684 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ganlikun 0:20e0c61e0684 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ganlikun 0:20e0c61e0684 28 *******************************************************************************
ganlikun 0:20e0c61e0684 29 */
ganlikun 0:20e0c61e0684 30 #include "device.h"
ganlikun 0:20e0c61e0684 31
ganlikun 0:20e0c61e0684 32 #if DEVICE_LOWPOWERTIMER
ganlikun 0:20e0c61e0684 33
ganlikun 0:20e0c61e0684 34 #include "ticker_api.h"
ganlikun 0:20e0c61e0684 35 #include "lp_ticker_api.h"
ganlikun 0:20e0c61e0684 36 #include "rtc_api.h"
ganlikun 0:20e0c61e0684 37 #include "rtc_api_hal.h"
ganlikun 0:20e0c61e0684 38
ganlikun 0:20e0c61e0684 39 static uint8_t lp_ticker_inited = 0;
ganlikun 0:20e0c61e0684 40
ganlikun 0:20e0c61e0684 41 void lp_ticker_init(void)
ganlikun 0:20e0c61e0684 42 {
ganlikun 0:20e0c61e0684 43 if (lp_ticker_inited) return;
ganlikun 0:20e0c61e0684 44 lp_ticker_inited = 1;
ganlikun 0:20e0c61e0684 45
ganlikun 0:20e0c61e0684 46 rtc_init();
ganlikun 0:20e0c61e0684 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
ganlikun 0:20e0c61e0684 48 }
ganlikun 0:20e0c61e0684 49
ganlikun 0:20e0c61e0684 50 uint32_t lp_ticker_read(void)
ganlikun 0:20e0c61e0684 51 {
ganlikun 0:20e0c61e0684 52 uint32_t usecs = 0;
ganlikun 0:20e0c61e0684 53 time_t time = 0;
ganlikun 0:20e0c61e0684 54
ganlikun 0:20e0c61e0684 55 lp_ticker_init();
ganlikun 0:20e0c61e0684 56
ganlikun 0:20e0c61e0684 57 do {
ganlikun 0:20e0c61e0684 58 time = rtc_read();
ganlikun 0:20e0c61e0684 59 usecs = rtc_read_subseconds();
ganlikun 0:20e0c61e0684 60 } while (time != rtc_read());
ganlikun 0:20e0c61e0684 61
ganlikun 0:20e0c61e0684 62 return (time * 1000000) + usecs;
ganlikun 0:20e0c61e0684 63 }
ganlikun 0:20e0c61e0684 64
ganlikun 0:20e0c61e0684 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
ganlikun 0:20e0c61e0684 66 {
ganlikun 0:20e0c61e0684 67 uint32_t delta;
ganlikun 0:20e0c61e0684 68
ganlikun 0:20e0c61e0684 69 delta = timestamp - lp_ticker_read();
ganlikun 0:20e0c61e0684 70 rtc_set_wake_up_timer(delta);
ganlikun 0:20e0c61e0684 71 }
ganlikun 0:20e0c61e0684 72
ganlikun 0:20e0c61e0684 73 void lp_ticker_fire_interrupt(void)
ganlikun 0:20e0c61e0684 74 {
ganlikun 0:20e0c61e0684 75 NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
ganlikun 0:20e0c61e0684 76 }
ganlikun 0:20e0c61e0684 77
ganlikun 0:20e0c61e0684 78 void lp_ticker_disable_interrupt(void)
ganlikun 0:20e0c61e0684 79 {
ganlikun 0:20e0c61e0684 80 rtc_deactivate_wake_up_timer();
ganlikun 0:20e0c61e0684 81 }
ganlikun 0:20e0c61e0684 82
ganlikun 0:20e0c61e0684 83 void lp_ticker_clear_interrupt(void)
ganlikun 0:20e0c61e0684 84 {
ganlikun 0:20e0c61e0684 85
ganlikun 0:20e0c61e0684 86 }
ganlikun 0:20e0c61e0684 87
ganlikun 0:20e0c61e0684 88 #endif
ganlikun 0:20e0c61e0684 89