siva surendar / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_NXP/TARGET_LPC11U6X/sleep.c@150:da61ba4e9755, 2016-11-25 (annotated)

Committer:
sivasuren
Date:
Fri Nov 25 07:57:40 2016 +0000
Revision:
150:da61ba4e9755
Parent:
149:156823d33999 
surendar changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "sleep_api.h"
<> 144:ef7eb2e8f9f7 17 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 18 #include "mbed_interface.h"
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 #if DEVICE_SLEEP
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 void sleep(void) {
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 #if (DEVICE_SEMIHOST == 1)
<> 144:ef7eb2e8f9f7 25 // ensure debug is disconnected
<> 144:ef7eb2e8f9f7 26 mbed_interface_disconnect();
<> 144:ef7eb2e8f9f7 27 #endif
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29 // PCON[PM] (bits 2:0) set to 0
<> 144:ef7eb2e8f9f7 30 LPC_PMU->PCON &= ~0x03;
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 // SRC[SLEEPDEEP] set to 0 = sleep
<> 144:ef7eb2e8f9f7 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 // wait for interrupt
<> 144:ef7eb2e8f9f7 36 __WFI();
<> 144:ef7eb2e8f9f7 37 }
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 void deepsleep(void) {
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 #if (DEVICE_SEMIHOST == 1)
<> 144:ef7eb2e8f9f7 43 // ensure debug is disconnected
<> 144:ef7eb2e8f9f7 44 mbed_interface_disconnect();
<> 144:ef7eb2e8f9f7 45 #endif
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 // PCON[PM] (bits 2:0) set to 1
<> 144:ef7eb2e8f9f7 48 LPC_PMU->PCON &= ~0x03;
<> 144:ef7eb2e8f9f7 49 LPC_PMU->PCON |= 0x01;
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
<> 144:ef7eb2e8f9f7 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
<> 144:ef7eb2e8f9f7 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 // Power up same as before powerdown
<> 144:ef7eb2e8f9f7 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 // All interrupts can wake
<> 144:ef7eb2e8f9f7 59 LPC_SYSCON->STARTERP0 = 0xFF;
<> 144:ef7eb2e8f9f7 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
<> 144:ef7eb2e8f9f7 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 // wait for interrupt
<> 144:ef7eb2e8f9f7 66 __WFI();
<> 144:ef7eb2e8f9f7 67 }
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 #endif