Umar Naeem / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by Umar Naeem

targets/hal/TARGET_NXP/TARGET_LPC11U6X/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 #include "mbed_interface.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 #if DEVICE_SLEEP
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 void sleep(void) {
bogdanm 0:9b334a45a8ff 23
bogdanm 0:9b334a45a8ff 24 #if (DEVICE_SEMIHOST == 1)
bogdanm 0:9b334a45a8ff 25 // ensure debug is disconnected
bogdanm 0:9b334a45a8ff 26 mbed_interface_disconnect();
bogdanm 0:9b334a45a8ff 27 #endif
bogdanm 0:9b334a45a8ff 28
bogdanm 0:9b334a45a8ff 29 // PCON[PM] (bits 2:0) set to 0
bogdanm 0:9b334a45a8ff 30 LPC_PMU->PCON &= ~0x03;
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 // SRC[SLEEPDEEP] set to 0 = sleep
bogdanm 0:9b334a45a8ff 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 // wait for interrupt
bogdanm 0:9b334a45a8ff 36 __WFI();
bogdanm 0:9b334a45a8ff 37 }
bogdanm 0:9b334a45a8ff 38
bogdanm 0:9b334a45a8ff 39
bogdanm 0:9b334a45a8ff 40 void deepsleep(void) {
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 #if (DEVICE_SEMIHOST == 1)
bogdanm 0:9b334a45a8ff 43 // ensure debug is disconnected
bogdanm 0:9b334a45a8ff 44 mbed_interface_disconnect();
bogdanm 0:9b334a45a8ff 45 #endif
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 // PCON[PM] (bits 2:0) set to 1
bogdanm 0:9b334a45a8ff 48 LPC_PMU->PCON &= ~0x03;
bogdanm 0:9b334a45a8ff 49 LPC_PMU->PCON |= 0x01;
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
bogdanm 0:9b334a45a8ff 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
bogdanm 0:9b334a45a8ff 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
bogdanm 0:9b334a45a8ff 54
bogdanm 0:9b334a45a8ff 55 // Power up same as before powerdown
bogdanm 0:9b334a45a8ff 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
bogdanm 0:9b334a45a8ff 57
bogdanm 0:9b334a45a8ff 58 // All interrupts can wake
bogdanm 0:9b334a45a8ff 59 LPC_SYSCON->STARTERP0 = 0xFF;
bogdanm 0:9b334a45a8ff 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
bogdanm 0:9b334a45a8ff 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 // wait for interrupt
bogdanm 0:9b334a45a8ff 66 __WFI();
bogdanm 0:9b334a45a8ff 67 }
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 #endif