Adam Kucybala / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC81X/sleep.c@47:02833c62d054, 2013-11-21 (annotated)

Committer:
mbed_official
Date:
Thu Nov 21 10:00:05 2013 +0000
Revision:
47:02833c62d054
Synchronized with git revision 6a5335a40ed97c7edd719e209bda5f3b5d9d997e



Full URL: https://github.com/mbedmicro/mbed/commit/6a5335a40ed97c7edd719e209bda5f3b5d9d997e/



Added sleep to LPC81x

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 47:02833c62d054 1 /* mbed Microcontroller Library
mbed_official 47:02833c62d054 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 47:02833c62d054 3 *
mbed_official 47:02833c62d054 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 47:02833c62d054 5 * you may not use this file except in compliance with the License.
mbed_official 47:02833c62d054 6 * You may obtain a copy of the License at
mbed_official 47:02833c62d054 7 *
mbed_official 47:02833c62d054 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 47:02833c62d054 9 *
mbed_official 47:02833c62d054 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 47:02833c62d054 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 47:02833c62d054 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 47:02833c62d054 13 * See the License for the specific language governing permissions and
mbed_official 47:02833c62d054 14 * limitations under the License.
mbed_official 47:02833c62d054 15 */
mbed_official 47:02833c62d054 16 #include "sleep_api.h"
mbed_official 47:02833c62d054 17 #include "cmsis.h"
mbed_official 47:02833c62d054 18
mbed_official 47:02833c62d054 19
mbed_official 47:02833c62d054 20 //#define DEEPSLEEP
mbed_official 47:02833c62d054 21 #define POWERDOWN
mbed_official 47:02833c62d054 22
mbed_official 47:02833c62d054 23 void sleep(void) {
mbed_official 47:02833c62d054 24 //Normal sleep mode for PCON:
mbed_official 47:02833c62d054 25 LPC_PMU->PCON &= ~0x03;
mbed_official 47:02833c62d054 26
mbed_official 47:02833c62d054 27 //Normal sleep mode for ARM core:
mbed_official 47:02833c62d054 28 SCB->SCR = 0;
mbed_official 47:02833c62d054 29
mbed_official 47:02833c62d054 30 //And go to sleep
mbed_official 47:02833c62d054 31 __WFI();
mbed_official 47:02833c62d054 32 }
mbed_official 47:02833c62d054 33
mbed_official 47:02833c62d054 34
mbed_official 47:02833c62d054 35
mbed_official 47:02833c62d054 36 //Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
mbed_official 47:02833c62d054 37
mbed_official 47:02833c62d054 38 #ifdef DEEPSLEEP
mbed_official 47:02833c62d054 39 void deepsleep(void) {
mbed_official 47:02833c62d054 40 //Deep sleep in PCON
mbed_official 47:02833c62d054 41 LPC_PMU->PCON &= ~0x03;
mbed_official 47:02833c62d054 42 LPC_PMU->PCON |= 0x01;
mbed_official 47:02833c62d054 43
mbed_official 47:02833c62d054 44 //If brownout detection and WDT are enabled, keep them enabled during sleep
mbed_official 47:02833c62d054 45 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
mbed_official 47:02833c62d054 46
mbed_official 47:02833c62d054 47 //After wakeup same stuff as currently enabled:
mbed_official 47:02833c62d054 48 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
mbed_official 47:02833c62d054 49
mbed_official 47:02833c62d054 50 //All interrupts may wake up:
mbed_official 47:02833c62d054 51 LPC_SYSCON->STARTERP0 = 0xFF;
mbed_official 47:02833c62d054 52 LPC_SYSCON->STARTERP1 = 0xFFFF;
mbed_official 47:02833c62d054 53
mbed_official 47:02833c62d054 54 //Deep sleep for ARM core:
mbed_official 47:02833c62d054 55 SCB->SCR = 1<<2;
mbed_official 47:02833c62d054 56
mbed_official 47:02833c62d054 57 __WFI();
mbed_official 47:02833c62d054 58 }
mbed_official 47:02833c62d054 59 #endif
mbed_official 47:02833c62d054 60
mbed_official 47:02833c62d054 61 #ifdef POWERDOWN
mbed_official 47:02833c62d054 62 void deepsleep(void) {
mbed_official 47:02833c62d054 63 //Powerdown in PCON
mbed_official 47:02833c62d054 64 LPC_PMU->PCON &= ~0x03;
mbed_official 47:02833c62d054 65 LPC_PMU->PCON |= 0x02;
mbed_official 47:02833c62d054 66
mbed_official 47:02833c62d054 67 //If brownout detection and WDT are enabled, keep them enabled during sleep
mbed_official 47:02833c62d054 68 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
mbed_official 47:02833c62d054 69
mbed_official 47:02833c62d054 70 //After wakeup same stuff as currently enabled:
mbed_official 47:02833c62d054 71 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
mbed_official 47:02833c62d054 72
mbed_official 47:02833c62d054 73 //All interrupts may wake up:
mbed_official 47:02833c62d054 74 LPC_SYSCON->STARTERP0 = 0xFF;
mbed_official 47:02833c62d054 75 LPC_SYSCON->STARTERP1 = 0xFFFF;
mbed_official 47:02833c62d054 76
mbed_official 47:02833c62d054 77 //Deep sleep for ARM core:
mbed_official 47:02833c62d054 78 SCB->SCR = 1<<2;
mbed_official 47:02833c62d054 79
mbed_official 47:02833c62d054 80 __WFI();
mbed_official 47:02833c62d054 81 }
mbed_official 47:02833c62d054 82 #endif