Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/hal/TARGET_NXP/TARGET_LPC82X/sleep.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "sleep_api.h"
bogdanm 0:9b334a45a8ff 17 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 18
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 //#define DEEPSLEEP
bogdanm 0:9b334a45a8ff 21 #define POWERDOWN
bogdanm 0:9b334a45a8ff 22
bogdanm 0:9b334a45a8ff 23 void sleep(void)
bogdanm 0:9b334a45a8ff 24 {
bogdanm 0:9b334a45a8ff 25 //Normal sleep mode for PCON:
bogdanm 0:9b334a45a8ff 26 LPC_PMU->PCON &= ~0x03;
bogdanm 0:9b334a45a8ff 27
bogdanm 0:9b334a45a8ff 28 //Normal sleep mode for ARM core:
bogdanm 0:9b334a45a8ff 29 SCB->SCR = 0;
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 //And go to sleep
bogdanm 0:9b334a45a8ff 32 __WFI();
bogdanm 0:9b334a45a8ff 33 }
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 // Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 void deepsleep(void)
bogdanm 0:9b334a45a8ff 38 {
bogdanm 0:9b334a45a8ff 39 //Deep sleep in PCON
bogdanm 0:9b334a45a8ff 40 LPC_PMU->PCON &= ~0x03;
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 #if defined(DEEPSLEEP)
bogdanm 0:9b334a45a8ff 43 LPC_PMU->PCON |= 0x01;
bogdanm 0:9b334a45a8ff 44 #elif defined(POWERDOWN)
bogdanm 0:9b334a45a8ff 45 LPC_PMU->PCON |= 0x02;
bogdanm 0:9b334a45a8ff 46 #endif
bogdanm 0:9b334a45a8ff 47
bogdanm 0:9b334a45a8ff 48 //If brownout detection and WDT are enabled, keep them enabled during sleep
bogdanm 0:9b334a45a8ff 49 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 //After wakeup same stuff as currently enabled:
bogdanm 0:9b334a45a8ff 52 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54 //All interrupts may wake up:
bogdanm 0:9b334a45a8ff 55 LPC_SYSCON->STARTERP0 = 0xFF;
bogdanm 0:9b334a45a8ff 56 LPC_SYSCON->STARTERP1 = 0xFFFF;
bogdanm 0:9b334a45a8ff 57
bogdanm 0:9b334a45a8ff 58 //Deep sleep for ARM core:
bogdanm 0:9b334a45a8ff 59 SCB->SCR = 1<<2;
bogdanm 0:9b334a45a8ff 60
bogdanm 0:9b334a45a8ff 61 __WFI();
bogdanm 0:9b334a45a8ff 62 }