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_LPC11U6X/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 #include "mbed_interface.h"
aravindsv 0:ba7650f404af 19
aravindsv 0:ba7650f404af 20 #if DEVICE_SLEEP
aravindsv 0:ba7650f404af 21
aravindsv 0:ba7650f404af 22 void sleep(void) {
aravindsv 0:ba7650f404af 23
aravindsv 0:ba7650f404af 24 #if (DEVICE_SEMIHOST == 1)
aravindsv 0:ba7650f404af 25 // ensure debug is disconnected
aravindsv 0:ba7650f404af 26 mbed_interface_disconnect();
aravindsv 0:ba7650f404af 27 #endif
aravindsv 0:ba7650f404af 28
aravindsv 0:ba7650f404af 29 // PCON[PM] (bits 2:0) set to 0
aravindsv 0:ba7650f404af 30 LPC_PMU->PCON &= ~0x03;
aravindsv 0:ba7650f404af 31
aravindsv 0:ba7650f404af 32 // SRC[SLEEPDEEP] set to 0 = sleep
aravindsv 0:ba7650f404af 33 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
aravindsv 0:ba7650f404af 34
aravindsv 0:ba7650f404af 35 // wait for interrupt
aravindsv 0:ba7650f404af 36 __WFI();
aravindsv 0:ba7650f404af 37 }
aravindsv 0:ba7650f404af 38
aravindsv 0:ba7650f404af 39
aravindsv 0:ba7650f404af 40 void deepsleep(void) {
aravindsv 0:ba7650f404af 41
aravindsv 0:ba7650f404af 42 #if (DEVICE_SEMIHOST == 1)
aravindsv 0:ba7650f404af 43 // ensure debug is disconnected
aravindsv 0:ba7650f404af 44 mbed_interface_disconnect();
aravindsv 0:ba7650f404af 45 #endif
aravindsv 0:ba7650f404af 46
aravindsv 0:ba7650f404af 47 // PCON[PM] (bits 2:0) set to 1
aravindsv 0:ba7650f404af 48 LPC_PMU->PCON &= ~0x03;
aravindsv 0:ba7650f404af 49 LPC_PMU->PCON |= 0x01;
aravindsv 0:ba7650f404af 50
aravindsv 0:ba7650f404af 51 //According to user manual it is kinda picky about reserved bits, so we follow that nicely
aravindsv 0:ba7650f404af 52 //Keep WDOSC and BOD in same state as they are now during deepsleep
aravindsv 0:ba7650f404af 53 LPC_SYSCON->PDSLEEPCFG = 0x00000037 | (LPC_SYSCON->PDRUNCFG & (0x00000048));
aravindsv 0:ba7650f404af 54
aravindsv 0:ba7650f404af 55 // Power up same as before powerdown
aravindsv 0:ba7650f404af 56 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
aravindsv 0:ba7650f404af 57
aravindsv 0:ba7650f404af 58 // All interrupts can wake
aravindsv 0:ba7650f404af 59 LPC_SYSCON->STARTERP0 = 0xFF;
aravindsv 0:ba7650f404af 60 LPC_SYSCON->STARTERP1 = 0xFFFFFFFF;
aravindsv 0:ba7650f404af 61
aravindsv 0:ba7650f404af 62 // SRC[SLEEPDEEP] set to 1 = deep sleep
aravindsv 0:ba7650f404af 63 SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
aravindsv 0:ba7650f404af 64
aravindsv 0:ba7650f404af 65 // wait for interrupt
aravindsv 0:ba7650f404af 66 __WFI();
aravindsv 0:ba7650f404af 67 }
aravindsv 0:ba7650f404af 68
aravindsv 0:ba7650f404af 69 #endif