1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #include "sleep_api.h"
18 #include "mbed_interface.h"
22 // PCON[DPDEN] set to sleep
25 // SRC[SLEEPDEEP] set to 0 = sleep
26 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
32 void deepsleep(void) {
34 // PCON[DPDEN] set to deepsleep
37 // SRC[SLEEPDEEP] set to 1 = deep sleep
38 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
40 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
41 //Keep WDOSC and BOD in same state as they are now during deepsleep
42 LPC_SYSCON->PDSLEEPCFG = 0x000018B7 | (LPC_SYSCON->PDRUNCFG & (PDRUNCFG_WDTOSC_PD | PDRUNCFG_BOD_PD));
44 // Power up same as before powerdown
45 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;