EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_STM/lp_ticker.c@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?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 *******************************************************************************
be_bryan 0:b74591d5ab33 3 * Copyright (c) 2016, STMicroelectronics
be_bryan 0:b74591d5ab33 4 * All rights reserved.
be_bryan 0:b74591d5ab33 5 *
be_bryan 0:b74591d5ab33 6 * Redistribution and use in source and binary forms, with or without
be_bryan 0:b74591d5ab33 7 * modification, are permitted provided that the following conditions are met:
be_bryan 0:b74591d5ab33 8 *
be_bryan 0:b74591d5ab33 9 * 1. Redistributions of source code must retain the above copyright notice,
be_bryan 0:b74591d5ab33 10 * this list of conditions and the following disclaimer.
be_bryan 0:b74591d5ab33 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
be_bryan 0:b74591d5ab33 12 * this list of conditions and the following disclaimer in the documentation
be_bryan 0:b74591d5ab33 13 * and/or other materials provided with the distribution.
be_bryan 0:b74591d5ab33 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
be_bryan 0:b74591d5ab33 15 * may be used to endorse or promote products derived from this software
be_bryan 0:b74591d5ab33 16 * without specific prior written permission.
be_bryan 0:b74591d5ab33 17 *
be_bryan 0:b74591d5ab33 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
be_bryan 0:b74591d5ab33 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
be_bryan 0:b74591d5ab33 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
be_bryan 0:b74591d5ab33 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
be_bryan 0:b74591d5ab33 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
be_bryan 0:b74591d5ab33 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
be_bryan 0:b74591d5ab33 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
be_bryan 0:b74591d5ab33 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
be_bryan 0:b74591d5ab33 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
be_bryan 0:b74591d5ab33 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
be_bryan 0:b74591d5ab33 28 *******************************************************************************
be_bryan 0:b74591d5ab33 29 */
be_bryan 0:b74591d5ab33 30 #include "device.h"
be_bryan 0:b74591d5ab33 31
be_bryan 0:b74591d5ab33 32 #if DEVICE_LOWPOWERTIMER
be_bryan 0:b74591d5ab33 33
be_bryan 0:b74591d5ab33 34 #include "ticker_api.h"
be_bryan 0:b74591d5ab33 35 #include "lp_ticker_api.h"
be_bryan 0:b74591d5ab33 36 #include "rtc_api.h"
be_bryan 0:b74591d5ab33 37 #include "rtc_api_hal.h"
be_bryan 0:b74591d5ab33 38
be_bryan 0:b74591d5ab33 39 static uint8_t lp_ticker_inited = 0;
be_bryan 0:b74591d5ab33 40
be_bryan 0:b74591d5ab33 41 void lp_ticker_init(void)
be_bryan 0:b74591d5ab33 42 {
be_bryan 0:b74591d5ab33 43 if (lp_ticker_inited) return;
be_bryan 0:b74591d5ab33 44 lp_ticker_inited = 1;
be_bryan 0:b74591d5ab33 45
be_bryan 0:b74591d5ab33 46 rtc_init();
be_bryan 0:b74591d5ab33 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
be_bryan 0:b74591d5ab33 48 }
be_bryan 0:b74591d5ab33 49
be_bryan 0:b74591d5ab33 50 uint32_t lp_ticker_read(void)
be_bryan 0:b74591d5ab33 51 {
be_bryan 0:b74591d5ab33 52 uint32_t usecs = 0;
be_bryan 0:b74591d5ab33 53 time_t time = 0;
be_bryan 0:b74591d5ab33 54
be_bryan 0:b74591d5ab33 55 lp_ticker_init();
be_bryan 0:b74591d5ab33 56
be_bryan 0:b74591d5ab33 57 do {
be_bryan 0:b74591d5ab33 58 time = rtc_read();
be_bryan 0:b74591d5ab33 59 usecs = rtc_read_subseconds();
be_bryan 0:b74591d5ab33 60 } while (time != rtc_read());
be_bryan 0:b74591d5ab33 61
be_bryan 0:b74591d5ab33 62 return (time * 1000000) + usecs;
be_bryan 0:b74591d5ab33 63 }
be_bryan 0:b74591d5ab33 64
be_bryan 0:b74591d5ab33 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
be_bryan 0:b74591d5ab33 66 {
be_bryan 0:b74591d5ab33 67 uint32_t delta;
be_bryan 0:b74591d5ab33 68
be_bryan 0:b74591d5ab33 69 delta = timestamp - lp_ticker_read();
be_bryan 0:b74591d5ab33 70 rtc_set_wake_up_timer(delta);
be_bryan 0:b74591d5ab33 71 }
be_bryan 0:b74591d5ab33 72
be_bryan 0:b74591d5ab33 73 void lp_ticker_fire_interrupt(void)
be_bryan 0:b74591d5ab33 74 {
be_bryan 0:b74591d5ab33 75 NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
be_bryan 0:b74591d5ab33 76 }
be_bryan 0:b74591d5ab33 77
be_bryan 0:b74591d5ab33 78 void lp_ticker_disable_interrupt(void)
be_bryan 0:b74591d5ab33 79 {
be_bryan 0:b74591d5ab33 80 rtc_deactivate_wake_up_timer();
be_bryan 0:b74591d5ab33 81 }
be_bryan 0:b74591d5ab33 82
be_bryan 0:b74591d5ab33 83 void lp_ticker_clear_interrupt(void)
be_bryan 0:b74591d5ab33 84 {
be_bryan 0:b74591d5ab33 85
be_bryan 0:b74591d5ab33 86 }
be_bryan 0:b74591d5ab33 87
be_bryan 0:b74591d5ab33 88 #endif