Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

targets/TARGET_STM/lp_ticker.c@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 *******************************************************************************
saloutos 0:083111ae2a11 3 * Copyright (c) 2016, STMicroelectronics
saloutos 0:083111ae2a11 4 * All rights reserved.
saloutos 0:083111ae2a11 5 *
saloutos 0:083111ae2a11 6 * Redistribution and use in source and binary forms, with or without
saloutos 0:083111ae2a11 7 * modification, are permitted provided that the following conditions are met:
saloutos 0:083111ae2a11 8 *
saloutos 0:083111ae2a11 9 * 1. Redistributions of source code must retain the above copyright notice,
saloutos 0:083111ae2a11 10 * this list of conditions and the following disclaimer.
saloutos 0:083111ae2a11 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
saloutos 0:083111ae2a11 12 * this list of conditions and the following disclaimer in the documentation
saloutos 0:083111ae2a11 13 * and/or other materials provided with the distribution.
saloutos 0:083111ae2a11 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
saloutos 0:083111ae2a11 15 * may be used to endorse or promote products derived from this software
saloutos 0:083111ae2a11 16 * without specific prior written permission.
saloutos 0:083111ae2a11 17 *
saloutos 0:083111ae2a11 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
saloutos 0:083111ae2a11 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
saloutos 0:083111ae2a11 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
saloutos 0:083111ae2a11 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
saloutos 0:083111ae2a11 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
saloutos 0:083111ae2a11 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
saloutos 0:083111ae2a11 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
saloutos 0:083111ae2a11 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
saloutos 0:083111ae2a11 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
saloutos 0:083111ae2a11 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
saloutos 0:083111ae2a11 28 *******************************************************************************
saloutos 0:083111ae2a11 29 */
saloutos 0:083111ae2a11 30 #include "device.h"
saloutos 0:083111ae2a11 31
saloutos 0:083111ae2a11 32 #if DEVICE_LOWPOWERTIMER
saloutos 0:083111ae2a11 33
saloutos 0:083111ae2a11 34 #include "ticker_api.h"
saloutos 0:083111ae2a11 35 #include "lp_ticker_api.h"
saloutos 0:083111ae2a11 36 #include "rtc_api.h"
saloutos 0:083111ae2a11 37 #include "rtc_api_hal.h"
saloutos 0:083111ae2a11 38
saloutos 0:083111ae2a11 39 static uint8_t lp_ticker_inited = 0;
saloutos 0:083111ae2a11 40
saloutos 0:083111ae2a11 41 void lp_ticker_init(void)
saloutos 0:083111ae2a11 42 {
saloutos 0:083111ae2a11 43 if (lp_ticker_inited) return;
saloutos 0:083111ae2a11 44 lp_ticker_inited = 1;
saloutos 0:083111ae2a11 45
saloutos 0:083111ae2a11 46 rtc_init();
saloutos 0:083111ae2a11 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
saloutos 0:083111ae2a11 48 }
saloutos 0:083111ae2a11 49
saloutos 0:083111ae2a11 50 uint32_t lp_ticker_read(void)
saloutos 0:083111ae2a11 51 {
saloutos 0:083111ae2a11 52 uint32_t usecs = 0;
saloutos 0:083111ae2a11 53 time_t time = 0;
saloutos 0:083111ae2a11 54
saloutos 0:083111ae2a11 55 lp_ticker_init();
saloutos 0:083111ae2a11 56
saloutos 0:083111ae2a11 57 do {
saloutos 0:083111ae2a11 58 time = rtc_read();
saloutos 0:083111ae2a11 59 usecs = rtc_read_subseconds();
saloutos 0:083111ae2a11 60 } while (time != rtc_read());
saloutos 0:083111ae2a11 61
saloutos 0:083111ae2a11 62 return (time * 1000000) + usecs;
saloutos 0:083111ae2a11 63 }
saloutos 0:083111ae2a11 64
saloutos 0:083111ae2a11 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
saloutos 0:083111ae2a11 66 {
saloutos 0:083111ae2a11 67 uint32_t delta;
saloutos 0:083111ae2a11 68
saloutos 0:083111ae2a11 69 delta = timestamp - lp_ticker_read();
saloutos 0:083111ae2a11 70 rtc_set_wake_up_timer(delta);
saloutos 0:083111ae2a11 71 }
saloutos 0:083111ae2a11 72
saloutos 0:083111ae2a11 73 void lp_ticker_fire_interrupt(void)
saloutos 0:083111ae2a11 74 {
saloutos 0:083111ae2a11 75 NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
saloutos 0:083111ae2a11 76 }
saloutos 0:083111ae2a11 77
saloutos 0:083111ae2a11 78 void lp_ticker_disable_interrupt(void)
saloutos 0:083111ae2a11 79 {
saloutos 0:083111ae2a11 80 rtc_deactivate_wake_up_timer();
saloutos 0:083111ae2a11 81 }
saloutos 0:083111ae2a11 82
saloutos 0:083111ae2a11 83 void lp_ticker_clear_interrupt(void)
saloutos 0:083111ae2a11 84 {
saloutos 0:083111ae2a11 85
saloutos 0:083111ae2a11 86 }
saloutos 0:083111ae2a11 87
saloutos 0:083111ae2a11 88 #endif