Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/targets/TARGET_STM/lp_ticker.c@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /* mbed Microcontroller Library
rahul_dahiya 0:fb8047b156bb 2 *******************************************************************************
rahul_dahiya 0:fb8047b156bb 3 * Copyright (c) 2016, STMicroelectronics
rahul_dahiya 0:fb8047b156bb 4 * All rights reserved.
rahul_dahiya 0:fb8047b156bb 5 *
rahul_dahiya 0:fb8047b156bb 6 * Redistribution and use in source and binary forms, with or without
rahul_dahiya 0:fb8047b156bb 7 * modification, are permitted provided that the following conditions are met:
rahul_dahiya 0:fb8047b156bb 8 *
rahul_dahiya 0:fb8047b156bb 9 * 1. Redistributions of source code must retain the above copyright notice,
rahul_dahiya 0:fb8047b156bb 10 * this list of conditions and the following disclaimer.
rahul_dahiya 0:fb8047b156bb 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
rahul_dahiya 0:fb8047b156bb 12 * this list of conditions and the following disclaimer in the documentation
rahul_dahiya 0:fb8047b156bb 13 * and/or other materials provided with the distribution.
rahul_dahiya 0:fb8047b156bb 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
rahul_dahiya 0:fb8047b156bb 15 * may be used to endorse or promote products derived from this software
rahul_dahiya 0:fb8047b156bb 16 * without specific prior written permission.
rahul_dahiya 0:fb8047b156bb 17 *
rahul_dahiya 0:fb8047b156bb 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
rahul_dahiya 0:fb8047b156bb 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
rahul_dahiya 0:fb8047b156bb 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
rahul_dahiya 0:fb8047b156bb 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
rahul_dahiya 0:fb8047b156bb 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
rahul_dahiya 0:fb8047b156bb 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
rahul_dahiya 0:fb8047b156bb 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
rahul_dahiya 0:fb8047b156bb 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
rahul_dahiya 0:fb8047b156bb 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
rahul_dahiya 0:fb8047b156bb 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
rahul_dahiya 0:fb8047b156bb 28 *******************************************************************************
rahul_dahiya 0:fb8047b156bb 29 */
rahul_dahiya 0:fb8047b156bb 30 #include "device.h"
rahul_dahiya 0:fb8047b156bb 31
rahul_dahiya 0:fb8047b156bb 32 #if DEVICE_LOWPOWERTIMER
rahul_dahiya 0:fb8047b156bb 33
rahul_dahiya 0:fb8047b156bb 34 #include "ticker_api.h"
rahul_dahiya 0:fb8047b156bb 35 #include "lp_ticker_api.h"
rahul_dahiya 0:fb8047b156bb 36 #include "rtc_api.h"
rahul_dahiya 0:fb8047b156bb 37 #include "rtc_api_hal.h"
rahul_dahiya 0:fb8047b156bb 38
rahul_dahiya 0:fb8047b156bb 39 static uint8_t lp_ticker_inited = 0;
rahul_dahiya 0:fb8047b156bb 40
rahul_dahiya 0:fb8047b156bb 41 void lp_ticker_init(void)
rahul_dahiya 0:fb8047b156bb 42 {
rahul_dahiya 0:fb8047b156bb 43 if (lp_ticker_inited) return;
rahul_dahiya 0:fb8047b156bb 44 lp_ticker_inited = 1;
rahul_dahiya 0:fb8047b156bb 45
rahul_dahiya 0:fb8047b156bb 46 rtc_init();
rahul_dahiya 0:fb8047b156bb 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
rahul_dahiya 0:fb8047b156bb 48 }
rahul_dahiya 0:fb8047b156bb 49
rahul_dahiya 0:fb8047b156bb 50 uint32_t lp_ticker_read(void)
rahul_dahiya 0:fb8047b156bb 51 {
rahul_dahiya 0:fb8047b156bb 52 uint32_t usecs = 0;
rahul_dahiya 0:fb8047b156bb 53 time_t time = 0;
rahul_dahiya 0:fb8047b156bb 54
rahul_dahiya 0:fb8047b156bb 55 lp_ticker_init();
rahul_dahiya 0:fb8047b156bb 56
rahul_dahiya 0:fb8047b156bb 57 do {
rahul_dahiya 0:fb8047b156bb 58 time = rtc_read();
rahul_dahiya 0:fb8047b156bb 59 usecs = rtc_read_subseconds();
rahul_dahiya 0:fb8047b156bb 60 } while (time != rtc_read());
rahul_dahiya 0:fb8047b156bb 61
rahul_dahiya 0:fb8047b156bb 62 return (time * 1000000) + usecs;
rahul_dahiya 0:fb8047b156bb 63 }
rahul_dahiya 0:fb8047b156bb 64
rahul_dahiya 0:fb8047b156bb 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
rahul_dahiya 0:fb8047b156bb 66 {
rahul_dahiya 0:fb8047b156bb 67 uint32_t delta;
rahul_dahiya 0:fb8047b156bb 68
rahul_dahiya 0:fb8047b156bb 69 delta = timestamp - lp_ticker_read();
rahul_dahiya 0:fb8047b156bb 70 rtc_set_wake_up_timer(delta);
rahul_dahiya 0:fb8047b156bb 71 }
rahul_dahiya 0:fb8047b156bb 72
rahul_dahiya 0:fb8047b156bb 73 void lp_ticker_fire_interrupt(void)
rahul_dahiya 0:fb8047b156bb 74 {
rahul_dahiya 0:fb8047b156bb 75 NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
rahul_dahiya 0:fb8047b156bb 76 }
rahul_dahiya 0:fb8047b156bb 77
rahul_dahiya 0:fb8047b156bb 78 void lp_ticker_disable_interrupt(void)
rahul_dahiya 0:fb8047b156bb 79 {
rahul_dahiya 0:fb8047b156bb 80 rtc_deactivate_wake_up_timer();
rahul_dahiya 0:fb8047b156bb 81 }
rahul_dahiya 0:fb8047b156bb 82
rahul_dahiya 0:fb8047b156bb 83 void lp_ticker_clear_interrupt(void)
rahul_dahiya 0:fb8047b156bb 84 {
rahul_dahiya 0:fb8047b156bb 85
rahul_dahiya 0:fb8047b156bb 86 }
rahul_dahiya 0:fb8047b156bb 87
rahul_dahiya 0:fb8047b156bb 88 #endif