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Merge pull request #2764 from svastm/lp_timer_l4
STM32L4 - Add low power timer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* 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" | ||
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| #if DEVICE_LOWPOWERTIMER | ||
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| #include "ticker_api.h" | ||
| #include "lp_ticker_api.h" | ||
| #include "rtc_api.h" | ||
| #include "rtc_api_hal.h" | ||
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| static uint8_t lp_ticker_inited = 0; | ||
|
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| void lp_ticker_init(void) | ||
| { | ||
| if (lp_ticker_inited) return; | ||
| lp_ticker_inited = 1; | ||
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| rtc_init(); | ||
| rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler); | ||
| } | ||
|
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| uint32_t lp_ticker_read(void) | ||
| { | ||
| uint32_t usecs; | ||
| time_t time; | ||
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| lp_ticker_init(); | ||
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| do { | ||
| time = rtc_read(); | ||
| usecs = rtc_read_subseconds(); | ||
| } while (time != rtc_read()); | ||
|
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| return (time * 1000000) + usecs; | ||
| } | ||
|
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| void lp_ticker_set_interrupt(timestamp_t timestamp) | ||
| { | ||
| uint32_t delta; | ||
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| delta = timestamp - lp_ticker_read(); | ||
| rtc_set_wake_up_timer(delta); | ||
| } | ||
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| void lp_ticker_disable_interrupt(void) | ||
| { | ||
| rtc_deactivate_wake_up_timer(); | ||
| } | ||
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| void lp_ticker_clear_interrupt(void) | ||
| { | ||
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| } | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* 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. | ||
| ******************************************************************************* | ||
| */ | ||
|
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| #ifndef MBED_RTC_API_HAL_H | ||
| #define MBED_RTC_API_HAL_H | ||
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| #include <stdint.h> | ||
| #include "rtc_api.h" | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
| /* | ||
| * Extend rtc_api.h | ||
| */ | ||
|
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| /** Set the given function as handler of wakeup timer event. | ||
| * | ||
| * @param handler The function to set as handler | ||
| */ | ||
| void rtc_set_irq_handler(uint32_t handler); | ||
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| /** Read the subsecond register. | ||
| * | ||
| * @return The remaining time as microseconds (0-999999) | ||
| */ | ||
| uint32_t rtc_read_subseconds(void); | ||
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| /** Program a wake up timer event in delta microseconds. | ||
| * | ||
| * @param delta The time to wait | ||
| */ | ||
| void rtc_set_wake_up_timer(uint32_t delta); | ||
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| /** Disable the wake up timer event. | ||
| * | ||
| * The wake up timer use auto reload, you have to deactivate it manually. | ||
| */ | ||
| void rtc_deactivate_wake_up_timer(void); | ||
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| /** Synchronise the RTC shadow registers. | ||
| * | ||
| * Must be called after a deepsleep. | ||
| */ | ||
| void rtc_synchronize(void); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif |
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