Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC81X/sleep.c@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "sleep_api.h"
elessair 0:f269e3021894 17 #include "cmsis.h"
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 //#define DEEPSLEEP
elessair 0:f269e3021894 21 #define POWERDOWN
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 void sleep(void) {
elessair 0:f269e3021894 24 //Normal sleep mode for PCON:
elessair 0:f269e3021894 25 LPC_PMU->PCON &= ~0x03;
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 //Normal sleep mode for ARM core:
elessair 0:f269e3021894 28 SCB->SCR = 0;
elessair 0:f269e3021894 29
elessair 0:f269e3021894 30 //And go to sleep
elessair 0:f269e3021894 31 __WFI();
elessair 0:f269e3021894 32 }
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 //Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 #ifdef DEEPSLEEP
elessair 0:f269e3021894 39 void deepsleep(void) {
elessair 0:f269e3021894 40 //Deep sleep in PCON
elessair 0:f269e3021894 41 LPC_PMU->PCON &= ~0x03;
elessair 0:f269e3021894 42 LPC_PMU->PCON |= 0x01;
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 //If brownout detection and WDT are enabled, keep them enabled during sleep
elessair 0:f269e3021894 45 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 //After wakeup same stuff as currently enabled:
elessair 0:f269e3021894 48 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
elessair 0:f269e3021894 49
elessair 0:f269e3021894 50 //All interrupts may wake up:
elessair 0:f269e3021894 51 LPC_SYSCON->STARTERP0 = 0xFF;
elessair 0:f269e3021894 52 LPC_SYSCON->STARTERP1 = 0xFFFF;
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 //Deep sleep for ARM core:
elessair 0:f269e3021894 55 SCB->SCR = 1<<2;
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 __WFI();
elessair 0:f269e3021894 58 }
elessair 0:f269e3021894 59 #endif
elessair 0:f269e3021894 60
elessair 0:f269e3021894 61 #ifdef POWERDOWN
elessair 0:f269e3021894 62 void deepsleep(void) {
elessair 0:f269e3021894 63 //Powerdown in PCON
elessair 0:f269e3021894 64 LPC_PMU->PCON &= ~0x03;
elessair 0:f269e3021894 65 LPC_PMU->PCON |= 0x02;
elessair 0:f269e3021894 66
elessair 0:f269e3021894 67 //If brownout detection and WDT are enabled, keep them enabled during sleep
elessair 0:f269e3021894 68 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
elessair 0:f269e3021894 69
elessair 0:f269e3021894 70 //After wakeup same stuff as currently enabled:
elessair 0:f269e3021894 71 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
elessair 0:f269e3021894 72
elessair 0:f269e3021894 73 //All interrupts may wake up:
elessair 0:f269e3021894 74 LPC_SYSCON->STARTERP0 = 0xFF;
elessair 0:f269e3021894 75 LPC_SYSCON->STARTERP1 = 0xFFFF;
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 //Deep sleep for ARM core:
elessair 0:f269e3021894 78 SCB->SCR = 1<<2;
elessair 0:f269e3021894 79
elessair 0:f269e3021894 80 __WFI();
elessair 0:f269e3021894 81 }
elessair 0:f269e3021894 82 #endif