tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC13XX/sleep.c

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16 #include "sleep_api.h"
  17 #include "cmsis.h"
  18 #include "mbed_interface.h"
  19
  20 void sleep(void) {
  21     // PCON[PD] set to sleep
  22     LPC_PMU->PCON = 0x0;
  23
  24     // SRC[SLEEPDEEP] set to 0 = sleep
  25     SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
  26
  27     // wait for interrupt
  28     __WFI();
  29 }
  30
  31 void deepsleep(void) {
  32     // PCON[PD] set to deepsleep
  33     LPC_PMU->PCON = 0x1;
  34
  35     // SRC[SLEEPDEEP] set to 1 = deep sleep
  36     SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
  37
  38     // Power up everything after powerdown
  39     LPC_SYSCON->PDAWAKECFG &= 0xFFFFF800;
  40
  41     // wait for interrupt
  42     __WFI();
  43 }