Aravind Vadali / mbed-src-AV

mbed.h library with any bug fixes AV finds.

Dependents:   micromouse4_encoder_testing PID_Test Lab1_Test WorkingPID ... more

targets/hal/TARGET_NXP/TARGET_LPC81X/sleep.c@1:ebce2ad32f95, 2015-11-02 (annotated)

Committer:
aravindsv
Date:
Mon Nov 02 03:07:12 2015 +0000
Revision:
1:ebce2ad32f95
Parent:
0:ba7650f404af 
Changed the RCC timeout value to 500 ms, so total code startup time before program starts running is ~1s. Hopefully no side-effects from lower startup timeouts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aravindsv 0:ba7650f404af 1 /* mbed Microcontroller Library
aravindsv 0:ba7650f404af 2 * Copyright (c) 2006-2013 ARM Limited
aravindsv 0:ba7650f404af 3 *
aravindsv 0:ba7650f404af 4 * Licensed under the Apache License, Version 2.0 (the "License");
aravindsv 0:ba7650f404af 5 * you may not use this file except in compliance with the License.
aravindsv 0:ba7650f404af 6 * You may obtain a copy of the License at
aravindsv 0:ba7650f404af 7 *
aravindsv 0:ba7650f404af 8 * http://www.apache.org/licenses/LICENSE-2.0
aravindsv 0:ba7650f404af 9 *
aravindsv 0:ba7650f404af 10 * Unless required by applicable law or agreed to in writing, software
aravindsv 0:ba7650f404af 11 * distributed under the License is distributed on an "AS IS" BASIS,
aravindsv 0:ba7650f404af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
aravindsv 0:ba7650f404af 13 * See the License for the specific language governing permissions and
aravindsv 0:ba7650f404af 14 * limitations under the License.
aravindsv 0:ba7650f404af 15 */
aravindsv 0:ba7650f404af 16 #include "sleep_api.h"
aravindsv 0:ba7650f404af 17 #include "cmsis.h"
aravindsv 0:ba7650f404af 18
aravindsv 0:ba7650f404af 19
aravindsv 0:ba7650f404af 20 //#define DEEPSLEEP
aravindsv 0:ba7650f404af 21 #define POWERDOWN
aravindsv 0:ba7650f404af 22
aravindsv 0:ba7650f404af 23 void sleep(void) {
aravindsv 0:ba7650f404af 24 //Normal sleep mode for PCON:
aravindsv 0:ba7650f404af 25 LPC_PMU->PCON &= ~0x03;
aravindsv 0:ba7650f404af 26
aravindsv 0:ba7650f404af 27 //Normal sleep mode for ARM core:
aravindsv 0:ba7650f404af 28 SCB->SCR = 0;
aravindsv 0:ba7650f404af 29
aravindsv 0:ba7650f404af 30 //And go to sleep
aravindsv 0:ba7650f404af 31 __WFI();
aravindsv 0:ba7650f404af 32 }
aravindsv 0:ba7650f404af 33
aravindsv 0:ba7650f404af 34
aravindsv 0:ba7650f404af 35
aravindsv 0:ba7650f404af 36 //Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
aravindsv 0:ba7650f404af 37
aravindsv 0:ba7650f404af 38 #ifdef DEEPSLEEP
aravindsv 0:ba7650f404af 39 void deepsleep(void) {
aravindsv 0:ba7650f404af 40 //Deep sleep in PCON
aravindsv 0:ba7650f404af 41 LPC_PMU->PCON &= ~0x03;
aravindsv 0:ba7650f404af 42 LPC_PMU->PCON |= 0x01;
aravindsv 0:ba7650f404af 43
aravindsv 0:ba7650f404af 44 //If brownout detection and WDT are enabled, keep them enabled during sleep
aravindsv 0:ba7650f404af 45 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
aravindsv 0:ba7650f404af 46
aravindsv 0:ba7650f404af 47 //After wakeup same stuff as currently enabled:
aravindsv 0:ba7650f404af 48 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
aravindsv 0:ba7650f404af 49
aravindsv 0:ba7650f404af 50 //All interrupts may wake up:
aravindsv 0:ba7650f404af 51 LPC_SYSCON->STARTERP0 = 0xFF;
aravindsv 0:ba7650f404af 52 LPC_SYSCON->STARTERP1 = 0xFFFF;
aravindsv 0:ba7650f404af 53
aravindsv 0:ba7650f404af 54 //Deep sleep for ARM core:
aravindsv 0:ba7650f404af 55 SCB->SCR = 1<<2;
aravindsv 0:ba7650f404af 56
aravindsv 0:ba7650f404af 57 __WFI();
aravindsv 0:ba7650f404af 58 }
aravindsv 0:ba7650f404af 59 #endif
aravindsv 0:ba7650f404af 60
aravindsv 0:ba7650f404af 61 #ifdef POWERDOWN
aravindsv 0:ba7650f404af 62 void deepsleep(void) {
aravindsv 0:ba7650f404af 63 //Powerdown in PCON
aravindsv 0:ba7650f404af 64 LPC_PMU->PCON &= ~0x03;
aravindsv 0:ba7650f404af 65 LPC_PMU->PCON |= 0x02;
aravindsv 0:ba7650f404af 66
aravindsv 0:ba7650f404af 67 //If brownout detection and WDT are enabled, keep them enabled during sleep
aravindsv 0:ba7650f404af 68 LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
aravindsv 0:ba7650f404af 69
aravindsv 0:ba7650f404af 70 //After wakeup same stuff as currently enabled:
aravindsv 0:ba7650f404af 71 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
aravindsv 0:ba7650f404af 72
aravindsv 0:ba7650f404af 73 //All interrupts may wake up:
aravindsv 0:ba7650f404af 74 LPC_SYSCON->STARTERP0 = 0xFF;
aravindsv 0:ba7650f404af 75 LPC_SYSCON->STARTERP1 = 0xFFFF;
aravindsv 0:ba7650f404af 76
aravindsv 0:ba7650f404af 77 //Deep sleep for ARM core:
aravindsv 0:ba7650f404af 78 SCB->SCR = 1<<2;
aravindsv 0:ba7650f404af 79
aravindsv 0:ba7650f404af 80 __WFI();
aravindsv 0:ba7650f404af 81 }
aravindsv 0:ba7650f404af 82 #endif