mirror of https://github.com/ARMmbed/mbed-os.git
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "sleep_api.h"
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#include "cmsis.h"
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#include "mbed_interface.h"
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#if DEVICE_SLEEP
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void hal_sleep(void) {
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#if (DEVICE_SEMIHOST == 1)
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// ensure debug is disconnected
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mbed_interface_disconnect();
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#endif
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// PCON[PM] (bits 2:0) set to 0
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LPC_PMU->PCON &= ~0x03;
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// SRC[SLEEPDEEP] set to 0 = sleep
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SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
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// wait for interrupt
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__WFI();
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}
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void hal_deepsleep(void) {
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#if (DEVICE_SEMIHOST == 1)
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// ensure debug is disconnected
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mbed_interface_disconnect();
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#endif
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// PCON[PM] (bits 2:0) set to 1
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LPC_PMU->PCON &= ~0x03;
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LPC_PMU->PCON |= 0x01;
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//According to user manual it is kinda picky about reserved bits, so we follow that nicely
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//Keep WDOSC and BOD in same state as they are now during deepsleep
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LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
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// Power up same as before powerdown
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LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
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// All interrupts can wake
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LPC_SYSCON->STARTERP0 = 0xFF;
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LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
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// SRC[SLEEPDEEP] set to 1 = deep sleep
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SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
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// wait for interrupt
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__WFI();
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}
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#endif
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