mbed library sources. Supersedes mbed-src.
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Diff: targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 22:9c52de9bc1d7
diff -r 423e1876dc07 -r ef7eb2e8f9f7 targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c --- a/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c Tue Aug 02 14:07:36 2016 +0000 +++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/sleep.c Fri Sep 02 15:07:44 2016 +0100 @@ -1,111 +1,104 @@ -/***************************************************************************//** - * @file sleep.c - ******************************************************************************* - * @section License - * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> - ******************************************************************************* - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute it - * freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must not - * claim that you wrote the original software. - * 2. Altered source versions must be plainly marked as such, and must not be - * misrepresented as being the original software. - * 3. This notice may not be removed or altered from any source distribution. - * - * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no - * obligation to support this Software. Silicon Labs is providing the - * Software "AS IS", with no express or implied warranties of any kind, - * including, but not limited to, any implied warranties of merchantability - * or fitness for any particular purpose or warranties against infringement - * of any proprietary rights of a third party. - * - * Silicon Labs will not be liable for any consequential, incidental, or - * special damages, or any other relief, or for any claim by any third party, - * arising from your use of this Software. - * - ******************************************************************************/ - -#include "device.h" -#if DEVICE_SLEEP - -#include "sleep_api.h" -#include "sleepmodes.h" -#include "cmsis.h" -#include "em_emu.h" -#include "em_int.h" - -uint32_t sleep_block_counter[NUM_SLEEP_MODES] = {0}; - -/** - * Sleep mode. - * Enter the lowest possible sleep mode that is not blocked by ongoing activity. - */ -void sleep(void) -{ - if (sleep_block_counter[0] > 0) { - /* Blocked everything below EM0, so just return */ - return; - } else if (sleep_block_counter[1] > 0) { - /* Blocked everything below EM1, enter EM1 */ - EMU_EnterEM1(); - } else if (sleep_block_counter[2] > 0) { - /* Blocked everything below EM2, enter EM2 */ - EMU_EnterEM2(true); - } else { - /* Blocked everything below EM3, enter EM3 */ - EMU_EnterEM3(true); - } /* Never enter EM4, as mbed has no way of configuring EM4 wakeup */ - return; -} - -/** - * Deep Sleep mode. - * Enter Energy Mode 2, turning off all high-frequency clocks. - * - * In EM2 the high frequency oscillator is turned off, but with the 32.768 kHz - * oscillator running, selected low energy peripherals (LCD, RTC, LETIMER, - * PCNT, LEUART, I2C, LESENSE, OPAMP, USB, WDOG and ACMP) are still - * available. This gives a high degree of autonomous operation with a current - * consumption as low as 1.1 μA with RTC enabled. Power-on Reset, Brown-out - * Detection and full RAM and CPU retention is also included. - */ -void deepsleep(void) -{ - EMU_EnterEM2(true); -} - -/** Block the microcontroller from sleeping below a certain mode - * - * This will block sleep() from entering an energy mode below the one given. - * -- To be called by peripheral HAL's -- - * - * After the peripheral is finished with the operation, it should call unblock with the same state - * - */ -void blockSleepMode(sleepstate_enum minimumMode) -{ - INT_Disable(); - sleep_block_counter[minimumMode]++; - INT_Enable(); -} - -/** Unblock the microcontroller from sleeping below a certain mode - * - * This will unblock sleep() from entering an energy mode below the one given. - * -- To be called by peripheral HAL's -- - * - * This should be called after all transactions on a peripheral are done. - */ -void unblockSleepMode(sleepstate_enum minimumMode) -{ - INT_Disable(); - if(sleep_block_counter[minimumMode] > 0) { - sleep_block_counter[minimumMode]--; - } - INT_Enable(); -} - -#endif +/***************************************************************************//** + * @file sleep.c + ******************************************************************************* + * @section License + * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> + ******************************************************************************* + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ******************************************************************************/ + +#include "device.h" +#if DEVICE_SLEEP + +#include "sleep_api.h" +#include "sleepmodes.h" +#include "cmsis.h" +#include "em_emu.h" +#include "critical.h" + +uint32_t sleep_block_counter[NUM_SLEEP_MODES] = {0}; + +/** + * Sleep mode. + * Enter the lowest possible sleep mode that is not blocked by ongoing activity. + */ +void sleep(void) +{ + if (sleep_block_counter[0] > 0) { + /* Blocked everything below EM0, so just return */ + return; + } else if (sleep_block_counter[1] > 0) { + /* Blocked everything below EM1, enter EM1 */ + EMU_EnterEM1(); + } else if (sleep_block_counter[2] > 0) { + /* Blocked everything below EM2, enter EM2 */ + EMU_EnterEM2(true); + } else { + /* Blocked everything below EM3, enter EM3 */ + EMU_EnterEM3(true); + } /* Never enter EM4, as mbed has no way of configuring EM4 wakeup */ + return; +} + +/** + * Deep Sleep mode. + * Enter Energy Mode 2, turning off all high-frequency clocks. + * + * In EM2 the high frequency oscillator is turned off, but with the 32.768 kHz + * oscillator running, selected low energy peripherals (LCD, RTC, LETIMER, + * PCNT, LEUART, I2C, LESENSE, OPAMP, USB, WDOG and ACMP) are still + * available. This gives a high degree of autonomous operation with a current + * consumption as low as 1.1 μA with RTC enabled. Power-on Reset, Brown-out + * Detection and full RAM and CPU retention is also included. + */ +void deepsleep(void) +{ + EMU_EnterEM2(true); +} + +/** Block the microcontroller from sleeping below a certain mode + * + * This will block sleep() from entering an energy mode below the one given. + * -- To be called by peripheral HAL's -- + * + * After the peripheral is finished with the operation, it should call unblock with the same state + * + */ +void blockSleepMode(sleepstate_enum minimumMode) +{ + core_util_critical_section_enter(); + sleep_block_counter[minimumMode]++; + core_util_critical_section_exit(); +} + +/** Unblock the microcontroller from sleeping below a certain mode + * + * This will unblock sleep() from entering an energy mode below the one given. + * -- To be called by peripheral HAL's -- + * + * This should be called after all transactions on a peripheral are done. + */ +void unblockSleepMode(sleepstate_enum minimumMode) +{ + core_util_critical_section_enter(); + if(sleep_block_counter[minimumMode] > 0) { + sleep_block_counter[minimumMode]--; + } + core_util_critical_section_exit(); +} + +#endif