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/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* 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 "sleep_api.h"
#include "cmsis.h"
//#define DEEPSLEEP
#define POWERDOWN
void sleep(void)
{
//Normal sleep mode for PCON:
LPC_PMU->PCON &= ~0x03;
//Normal sleep mode for ARM core:
SCB->SCR = 0;
//And go to sleep
__WFI();
}
// Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
void deepsleep(void)
{
//Deep sleep in PCON
LPC_PMU->PCON &= ~0x03;
#if defined(DEEPSLEEP)
LPC_PMU->PCON |= 0x01;
#elif defined(POWERDOWN)
LPC_PMU->PCON |= 0x02;
#endif
//If brownout detection and WDT are enabled, keep them enabled during sleep
LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
//After wakeup same stuff as currently enabled:
LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
//All interrupts may wake up:
LPC_SYSCON->STARTERP0 = 0xFF;
LPC_SYSCON->STARTERP1 = 0xFFFF;
//Deep sleep for ARM core:
SCB->SCR = 1<<2;
__WFI();
}
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