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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"
#include "mbed_interface.h"
#if DEVICE_SLEEP
void sleep(void) {
#if (DEVICE_SEMIHOST == 1)
// ensure debug is disconnected
mbed_interface_disconnect();
#endif
// PCON[PM] (bits 2:0) set to 0
LPC_PMU->PCON &= ~0x03;
// SRC[SLEEPDEEP] set to 0 = sleep
SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
// wait for interrupt
__WFI();
}
void deepsleep(void) {
#if (DEVICE_SEMIHOST == 1)
// ensure debug is disconnected
mbed_interface_disconnect();
#endif
// PCON[PM] (bits 2:0) set to 1
LPC_PMU->PCON &= ~0x03;
LPC_PMU->PCON |= 0x01;
//According to user manual it is kinda picky about reserved bits, so we follow that nicely
//Keep WDOSC and BOD in same state as they are now during deepsleep
LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
// Power up same as before powerdown
LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
// All interrupts can wake
LPC_SYSCON->STARTERP0 = 0xFF;
LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
// SRC[SLEEPDEEP] set to 1 = deep sleep
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
// wait for interrupt
__WFI();
}
#endif
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