mirror of https://github.com/ARMmbed/mbed-os.git
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/* mbed Microcontroller Library
|
|
*******************************************************************************
|
|
* Copyright (c) 2016, STMicroelectronics
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* 3. Neither the name of STMicroelectronics nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*******************************************************************************
|
|
*/
|
|
#include "device.h"
|
|
|
|
#if DEVICE_LOWPOWERTIMER
|
|
|
|
#include "ticker_api.h"
|
|
#include "lp_ticker_api.h"
|
|
#include "rtc_api.h"
|
|
#include "rtc_api_hal.h"
|
|
|
|
static uint8_t lp_ticker_inited = 0;
|
|
|
|
void lp_ticker_init(void)
|
|
{
|
|
if (lp_ticker_inited) return;
|
|
lp_ticker_inited = 1;
|
|
|
|
rtc_init();
|
|
rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
|
|
}
|
|
|
|
uint32_t lp_ticker_read(void)
|
|
{
|
|
uint32_t usecs = 0;
|
|
time_t time = 0;
|
|
|
|
lp_ticker_init();
|
|
|
|
do {
|
|
time = rtc_read();
|
|
usecs = rtc_read_subseconds();
|
|
} while (time != rtc_read());
|
|
|
|
return (time * 1000000) + usecs;
|
|
}
|
|
|
|
void lp_ticker_set_interrupt(timestamp_t timestamp)
|
|
{
|
|
uint32_t delta;
|
|
|
|
delta = timestamp - lp_ticker_read();
|
|
rtc_set_wake_up_timer(delta);
|
|
}
|
|
|
|
void lp_ticker_fire_interrupt(void)
|
|
{
|
|
NVIC_SetPendingIRQ(RTC_WKUP_IRQn);
|
|
}
|
|
|
|
void lp_ticker_disable_interrupt(void)
|
|
{
|
|
rtc_deactivate_wake_up_timer();
|
|
}
|
|
|
|
void lp_ticker_clear_interrupt(void)
|
|
{
|
|
|
|
}
|
|
|
|
#endif
|