Mateusz Kowalik / Application

USB Serial application

Fork of USBSerial_HelloWorld by Samuel Mokrani

mbed-dev/targets/TARGET_NXP/TARGET_LPC11U6X/sleep.c@11:b3f2a8bdac4d, 2017-12-16 (annotated)

Committer:
Zaitsev
Date:
Sat Dec 16 10:26:48 2017 +0000
Revision:
11:b3f2a8bdac4d
Parent:
10:41552d038a69 
A copy for D.S;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /* mbed Microcontroller Library
Zaitsev 10:41552d038a69 2 * Copyright (c) 2006-2013 ARM Limited
Zaitsev 10:41552d038a69 3 *
Zaitsev 10:41552d038a69 4 * Licensed under the Apache License, Version 2.0 (the "License");
Zaitsev 10:41552d038a69 5 * you may not use this file except in compliance with the License.
Zaitsev 10:41552d038a69 6 * You may obtain a copy of the License at
Zaitsev 10:41552d038a69 7 *
Zaitsev 10:41552d038a69 8 * http://www.apache.org/licenses/LICENSE-2.0
Zaitsev 10:41552d038a69 9 *
Zaitsev 10:41552d038a69 10 * Unless required by applicable law or agreed to in writing, software
Zaitsev 10:41552d038a69 11 * distributed under the License is distributed on an "AS IS" BASIS,
Zaitsev 10:41552d038a69 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Zaitsev 10:41552d038a69 13 * See the License for the specific language governing permissions and
Zaitsev 10:41552d038a69 14 * limitations under the License.
Zaitsev 10:41552d038a69 15 */
Zaitsev 10:41552d038a69 16 #include "sleep_api.h"
Zaitsev 10:41552d038a69 17 #include "cmsis.h"
Zaitsev 10:41552d038a69 18 #include "mbed_interface.h"
Zaitsev 10:41552d038a69 19
Zaitsev 10:41552d038a69 20 #if DEVICE_SLEEP
Zaitsev 10:41552d038a69 21
Zaitsev 10:41552d038a69 22 void sleep(void) {
Zaitsev 10:41552d038a69 23
Zaitsev 10:41552d038a69 24 #if (DEVICE_SEMIHOST == 1)
Zaitsev 10:41552d038a69 25 // ensure debug is disconnected
Zaitsev 10:41552d038a69 26 mbed_interface_disconnect();
Zaitsev 10:41552d038a69 27 #endif
Zaitsev 10:41552d038a69 28
Zaitsev 10:41552d038a69 29 // PCON[PM] (bits 2:0) set to 0
Zaitsev 10:41552d038a69 30 LPC_PMU->PCON &= ~0x03;
Zaitsev 10:41552d038a69 31
Zaitsev 10:41552d038a69 32 // SRC[SLEEPDEEP] set to 0 = sleep
Zaitsev 10:41552d038a69 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
Zaitsev 10:41552d038a69 34
Zaitsev 10:41552d038a69 35 // wait for interrupt
Zaitsev 10:41552d038a69 36 __WFI();
Zaitsev 10:41552d038a69 37 }
Zaitsev 10:41552d038a69 38
Zaitsev 10:41552d038a69 39
Zaitsev 10:41552d038a69 40 void deepsleep(void) {
Zaitsev 10:41552d038a69 41
Zaitsev 10:41552d038a69 42 #if (DEVICE_SEMIHOST == 1)
Zaitsev 10:41552d038a69 43 // ensure debug is disconnected
Zaitsev 10:41552d038a69 44 mbed_interface_disconnect();
Zaitsev 10:41552d038a69 45 #endif
Zaitsev 10:41552d038a69 46
Zaitsev 10:41552d038a69 47 // PCON[PM] (bits 2:0) set to 1
Zaitsev 10:41552d038a69 48 LPC_PMU->PCON &= ~0x03;
Zaitsev 10:41552d038a69 49 LPC_PMU->PCON |= 0x01;
Zaitsev 10:41552d038a69 50
Zaitsev 10:41552d038a69 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
Zaitsev 10:41552d038a69 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
Zaitsev 10:41552d038a69 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
Zaitsev 10:41552d038a69 54
Zaitsev 10:41552d038a69 55 // Power up same as before powerdown
Zaitsev 10:41552d038a69 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
Zaitsev 10:41552d038a69 57
Zaitsev 10:41552d038a69 58 // All interrupts can wake
Zaitsev 10:41552d038a69 59 LPC_SYSCON->STARTERP0 = 0xFF;
Zaitsev 10:41552d038a69 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
Zaitsev 10:41552d038a69 61
Zaitsev 10:41552d038a69 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
Zaitsev 10:41552d038a69 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
Zaitsev 10:41552d038a69 64
Zaitsev 10:41552d038a69 65 // wait for interrupt
Zaitsev 10:41552d038a69 66 __WFI();
Zaitsev 10:41552d038a69 67 }
Zaitsev 10:41552d038a69 68
Zaitsev 10:41552d038a69 69 #endif