Nick Zhou / mbed-src-ST-demo

mbed library sources change for ST sensors and ST BLE

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/sleep.c@82:0b31dbcd4769, 2014-01-31 (annotated)

Committer:
mbed_official
Date:
Fri Jan 31 10:00:06 2014 +0000
Revision:
82:0b31dbcd4769
Child:
363:12a245e5c745
Synchronized with git revision 74409cbd593d1daab530a57baaa563f30b04b018



Full URL: https://github.com/mbedmicro/mbed/commit/74409cbd593d1daab530a57baaa563f30b04b018/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 82:0b31dbcd4769 16 #include "sleep_api.h"
mbed_official 82:0b31dbcd4769 17 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 18 #include "PeripheralPins.h"
mbed_official 82:0b31dbcd4769 19
mbed_official 82:0b31dbcd4769 20 //Normal wait mode
mbed_official 82:0b31dbcd4769 21 void sleep(void)
mbed_official 82:0b31dbcd4769 22 {
mbed_official 82:0b31dbcd4769 23 SMC->PMPROT = SMC_PMPROT_AVLLS_MASK | SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLP_MASK;
mbed_official 82:0b31dbcd4769 24
mbed_official 82:0b31dbcd4769 25 //Normal sleep mode for ARM core:
mbed_official 82:0b31dbcd4769 26 SCB->SCR = 0;
mbed_official 82:0b31dbcd4769 27 __WFI();
mbed_official 82:0b31dbcd4769 28 }
mbed_official 82:0b31dbcd4769 29
mbed_official 82:0b31dbcd4769 30 //Very low-power stop mode
mbed_official 82:0b31dbcd4769 31 void deepsleep(void)
mbed_official 82:0b31dbcd4769 32 {
mbed_official 82:0b31dbcd4769 33 //Check if PLL/FLL is enabled:
mbed_official 82:0b31dbcd4769 34 uint32_t PLL_FLL_en = (MCG->C1 & MCG_C1_CLKS_MASK) == MCG_C1_CLKS(0);
mbed_official 82:0b31dbcd4769 35
mbed_official 82:0b31dbcd4769 36 SMC->PMPROT = SMC_PMPROT_AVLLS_MASK | SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLP_MASK;
mbed_official 82:0b31dbcd4769 37 SMC->PMCTRL = SMC_PMCTRL_STOPM(2);
mbed_official 82:0b31dbcd4769 38
mbed_official 82:0b31dbcd4769 39 //Deep sleep for ARM core:
mbed_official 82:0b31dbcd4769 40 SCB->SCR = 1<<SCB_SCR_SLEEPDEEP_Pos;
mbed_official 82:0b31dbcd4769 41
mbed_official 82:0b31dbcd4769 42 __WFI();
mbed_official 82:0b31dbcd4769 43
mbed_official 82:0b31dbcd4769 44 //Switch back to PLL as clock source if needed
mbed_official 82:0b31dbcd4769 45 //The interrupt that woke up the device will run at reduced speed
mbed_official 82:0b31dbcd4769 46 if (PLL_FLL_en) {
mbed_official 82:0b31dbcd4769 47 #ifdef MCG_C5_PLLCLKEN0_MASK //PLL available
mbed_official 82:0b31dbcd4769 48 if (MCG->C6 & (1<<MCG_C6_PLLS_SHIFT) != 0) /* If PLL */
mbed_official 82:0b31dbcd4769 49 while((MCG->S & MCG_S_LOCK0_MASK) == 0x00U); /* Wait until locked */
mbed_official 82:0b31dbcd4769 50 #endif
mbed_official 82:0b31dbcd4769 51 MCG->C1 &= ~MCG_C1_CLKS_MASK;
mbed_official 82:0b31dbcd4769 52 }
mbed_official 82:0b31dbcd4769 53
mbed_official 82:0b31dbcd4769 54 }