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_STM32F0/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
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2016, STMicroelectronics
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30 #include "device.h"
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 #if DEVICE_LOWPOWERTIMER
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #include "ticker_api.h"
<> 144:ef7eb2e8f9f7 35 #include "lp_ticker_api.h"
<> 144:ef7eb2e8f9f7 36 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 37 #include "rtc_api_hal.h"
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 static uint8_t lp_ticker_inited = 0;
<> 144:ef7eb2e8f9f7 40
<> 148:21d94c44109e 41 void lp_ticker_init(void)
<> 148:21d94c44109e 42 {
<> 144:ef7eb2e8f9f7 43 if (lp_ticker_inited) return;
<> 144:ef7eb2e8f9f7 44 lp_ticker_inited = 1;
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 rtc_init();
<> 144:ef7eb2e8f9f7 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49
<> 148:21d94c44109e 50 uint32_t lp_ticker_read(void)
<> 148:21d94c44109e 51 {
<> 148:21d94c44109e 52 uint32_t usecs;
<> 144:ef7eb2e8f9f7 53 time_t time;
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 lp_ticker_init();
<> 144:ef7eb2e8f9f7 56
<> 148:21d94c44109e 57 do {
<> 144:ef7eb2e8f9f7 58 time = rtc_read();
<> 148:21d94c44109e 59 usecs = rtc_read_subseconds();
<> 148:21d94c44109e 60 } while (time != rtc_read());
<> 144:ef7eb2e8f9f7 61
<> 148:21d94c44109e 62 return (time * 1000000) + usecs;
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64
<> 148:21d94c44109e 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
<> 148:21d94c44109e 66 {
<> 148:21d94c44109e 67 uint32_t delta;
<> 144:ef7eb2e8f9f7 68
<> 148:21d94c44109e 69 delta = timestamp - lp_ticker_read();
<> 148:21d94c44109e 70 rtc_set_wake_up_timer(delta);
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72
<> 148:21d94c44109e 73 void lp_ticker_disable_interrupt(void)
<> 148:21d94c44109e 74 {
<> 148:21d94c44109e 75 rtc_deactivate_wake_up_timer();
<> 144:ef7eb2e8f9f7 76 }
<> 144:ef7eb2e8f9f7 77
<> 148:21d94c44109e 78 void lp_ticker_clear_interrupt(void)
<> 148:21d94c44109e 79 {
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 #endif