b luo / mbed-dev

mbed library sources. With a patch for the can_api

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32L1/lp_ticker.c@151:91825d030f9b, 2016-11-14 (annotated)

Committer:
DangerousElectrician
Date:
Mon Nov 14 04:39:23 2016 +0000
Revision:
151:91825d030f9b
Parent:
149:156823d33999 
stuff changed?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 148:21d94c44109e 1 /* mbed Microcontroller Library
<> 148:21d94c44109e 2 *******************************************************************************
<> 148:21d94c44109e 3 * Copyright (c) 2016, STMicroelectronics
<> 148:21d94c44109e 4 * All rights reserved.
<> 148:21d94c44109e 5 *
<> 148:21d94c44109e 6 * Redistribution and use in source and binary forms, with or without
<> 148:21d94c44109e 7 * modification, are permitted provided that the following conditions are met:
<> 148:21d94c44109e 8 *
<> 148:21d94c44109e 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 148:21d94c44109e 10 * this list of conditions and the following disclaimer.
<> 148:21d94c44109e 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 148:21d94c44109e 12 * this list of conditions and the following disclaimer in the documentation
<> 148:21d94c44109e 13 * and/or other materials provided with the distribution.
<> 148:21d94c44109e 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 148:21d94c44109e 15 * may be used to endorse or promote products derived from this software
<> 148:21d94c44109e 16 * without specific prior written permission.
<> 148:21d94c44109e 17 *
<> 148:21d94c44109e 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 148:21d94c44109e 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 148:21d94c44109e 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 148:21d94c44109e 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 148:21d94c44109e 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 148:21d94c44109e 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 148:21d94c44109e 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 148:21d94c44109e 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 148:21d94c44109e 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 148:21d94c44109e 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 148:21d94c44109e 28 *******************************************************************************
<> 148:21d94c44109e 29 */
<> 148:21d94c44109e 30 #include "device.h"
<> 148:21d94c44109e 31
<> 148:21d94c44109e 32 #if DEVICE_LOWPOWERTIMER
<> 148:21d94c44109e 33
<> 148:21d94c44109e 34 #include "ticker_api.h"
<> 148:21d94c44109e 35 #include "lp_ticker_api.h"
<> 148:21d94c44109e 36 #include "rtc_api.h"
<> 148:21d94c44109e 37 #include "rtc_api_hal.h"
<> 148:21d94c44109e 38
<> 148:21d94c44109e 39 static uint8_t lp_ticker_inited = 0;
<> 148:21d94c44109e 40
<> 148:21d94c44109e 41 void lp_ticker_init(void)
<> 148:21d94c44109e 42 {
<> 148:21d94c44109e 43 if (lp_ticker_inited) return;
<> 148:21d94c44109e 44 lp_ticker_inited = 1;
<> 148:21d94c44109e 45
<> 148:21d94c44109e 46 rtc_init();
<> 148:21d94c44109e 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
<> 148:21d94c44109e 48 }
<> 148:21d94c44109e 49
<> 148:21d94c44109e 50 uint32_t lp_ticker_read(void)
<> 148:21d94c44109e 51 {
<> 148:21d94c44109e 52 uint32_t usecs;
<> 148:21d94c44109e 53 time_t time;
<> 148:21d94c44109e 54
<> 148:21d94c44109e 55 lp_ticker_init();
<> 148:21d94c44109e 56
<> 148:21d94c44109e 57 do {
<> 148:21d94c44109e 58 time = rtc_read();
<> 148:21d94c44109e 59 usecs = rtc_read_subseconds();
<> 148:21d94c44109e 60 } while (time != rtc_read());
<> 148:21d94c44109e 61
<> 148:21d94c44109e 62 return (time * 1000000) + usecs;
<> 148:21d94c44109e 63 }
<> 148:21d94c44109e 64
<> 148:21d94c44109e 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
<> 148:21d94c44109e 66 {
<> 148:21d94c44109e 67 uint32_t delta;
<> 148:21d94c44109e 68
<> 148:21d94c44109e 69 delta = timestamp - lp_ticker_read();
<> 148:21d94c44109e 70 rtc_set_wake_up_timer(delta);
<> 148:21d94c44109e 71 }
<> 148:21d94c44109e 72
<> 148:21d94c44109e 73 void lp_ticker_disable_interrupt(void)
<> 148:21d94c44109e 74 {
<> 148:21d94c44109e 75 rtc_deactivate_wake_up_timer();
<> 148:21d94c44109e 76 }
<> 148:21d94c44109e 77
<> 148:21d94c44109e 78 void lp_ticker_clear_interrupt(void)
<> 148:21d94c44109e 79 {
<> 148:21d94c44109e 80
<> 148:21d94c44109e 81 }
<> 148:21d94c44109e 82
<> 148:21d94c44109e 83 #endif