Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC11U6X/sleep.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
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 #include "mbed_interface.h"
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 #if DEVICE_SLEEP
elessair 0:f269e3021894 21
elessair 0:f269e3021894 22 void sleep(void) {
elessair 0:f269e3021894 23
elessair 0:f269e3021894 24 #if (DEVICE_SEMIHOST == 1)
elessair 0:f269e3021894 25 // ensure debug is disconnected
elessair 0:f269e3021894 26 mbed_interface_disconnect();
elessair 0:f269e3021894 27 #endif
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 // PCON[PM] (bits 2:0) set to 0
elessair 0:f269e3021894 30 LPC_PMU->PCON &= ~0x03;
elessair 0:f269e3021894 31
elessair 0:f269e3021894 32 // SRC[SLEEPDEEP] set to 0 = sleep
elessair 0:f269e3021894 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 // wait for interrupt
elessair 0:f269e3021894 36 __WFI();
elessair 0:f269e3021894 37 }
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 void deepsleep(void) {
elessair 0:f269e3021894 41
elessair 0:f269e3021894 42 #if (DEVICE_SEMIHOST == 1)
elessair 0:f269e3021894 43 // ensure debug is disconnected
elessair 0:f269e3021894 44 mbed_interface_disconnect();
elessair 0:f269e3021894 45 #endif
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 // PCON[PM] (bits 2:0) set to 1
elessair 0:f269e3021894 48 LPC_PMU->PCON &= ~0x03;
elessair 0:f269e3021894 49 LPC_PMU->PCON |= 0x01;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
elessair 0:f269e3021894 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
elessair 0:f269e3021894 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
elessair 0:f269e3021894 54
elessair 0:f269e3021894 55 // Power up same as before powerdown
elessair 0:f269e3021894 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
elessair 0:f269e3021894 57
elessair 0:f269e3021894 58 // All interrupts can wake
elessair 0:f269e3021894 59 LPC_SYSCON->STARTERP0 = 0xFF;
elessair 0:f269e3021894 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
elessair 0:f269e3021894 61
elessair 0:f269e3021894 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
elessair 0:f269e3021894 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 // wait for interrupt
elessair 0:f269e3021894 66 __WFI();
elessair 0:f269e3021894 67 }
elessair 0:f269e3021894 68
elessair 0:f269e3021894 69 #endif