shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_K20D50M/sleep.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
255:20b371a9491b 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 161:09d8213f0000 1 /* mbed Microcontroller Library
mbed_official 161:09d8213f0000 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 161:09d8213f0000 3 *
mbed_official 161:09d8213f0000 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 161:09d8213f0000 5 * you may not use this file except in compliance with the License.
mbed_official 161:09d8213f0000 6 * You may obtain a copy of the License at
mbed_official 161:09d8213f0000 7 *
mbed_official 161:09d8213f0000 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 161:09d8213f0000 9 *
mbed_official 161:09d8213f0000 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 161:09d8213f0000 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 161:09d8213f0000 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 161:09d8213f0000 13 * See the License for the specific language governing permissions and
mbed_official 161:09d8213f0000 14 * limitations under the License.
mbed_official 161:09d8213f0000 15 */
mbed_official 161:09d8213f0000 16 #include "sleep_api.h"
mbed_official 161:09d8213f0000 17 #include "cmsis.h"
mbed_official 161:09d8213f0000 18
mbed_official 161:09d8213f0000 19 //Normal wait mode
mbed_official 161:09d8213f0000 20 void sleep(void)
mbed_official 161:09d8213f0000 21 {
mbed_official 161:09d8213f0000 22 SMC->PMPROT = SMC_PMPROT_AVLLS_MASK | SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLP_MASK;
mbed_official 161:09d8213f0000 23
mbed_official 161:09d8213f0000 24 //Normal sleep mode for ARM core:
mbed_official 161:09d8213f0000 25 SCB->SCR = 0;
mbed_official 161:09d8213f0000 26 __WFI();
mbed_official 161:09d8213f0000 27 }
mbed_official 161:09d8213f0000 28
mbed_official 161:09d8213f0000 29 //Very low-power stop mode
mbed_official 161:09d8213f0000 30 void deepsleep(void)
mbed_official 161:09d8213f0000 31 {
mbed_official 161:09d8213f0000 32 //Check if PLL/FLL is enabled:
mbed_official 161:09d8213f0000 33 uint32_t PLL_FLL_en = (MCG->C1 & MCG_C1_CLKS_MASK) == MCG_C1_CLKS(0);
mbed_official 161:09d8213f0000 34
mbed_official 161:09d8213f0000 35 SMC->PMPROT = SMC_PMPROT_AVLLS_MASK | SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLP_MASK;
mbed_official 161:09d8213f0000 36 SMC->PMCTRL = SMC_PMCTRL_STOPM(2);
mbed_official 161:09d8213f0000 37
mbed_official 161:09d8213f0000 38 //Deep sleep for ARM core:
mbed_official 161:09d8213f0000 39 SCB->SCR = 1<<SCB_SCR_SLEEPDEEP_Pos;
mbed_official 161:09d8213f0000 40
mbed_official 161:09d8213f0000 41 __WFI();
mbed_official 161:09d8213f0000 42
mbed_official 161:09d8213f0000 43 //Switch back to PLL as clock source if needed
mbed_official 161:09d8213f0000 44 //The interrupt that woke up the device will run at reduced speed
mbed_official 161:09d8213f0000 45 if (PLL_FLL_en) {
mbed_official 161:09d8213f0000 46 if (MCG->C6 & (1<<MCG_C6_PLLS_SHIFT) != 0) /* If PLL */
mbed_official 161:09d8213f0000 47 while((MCG->S & MCG_S_LOCK0_MASK) == 0x00U); /* Wait until locked */
mbed_official 161:09d8213f0000 48 MCG->C1 &= ~MCG_C1_CLKS_MASK;
mbed_official 161:09d8213f0000 49 }
mbed_official 161:09d8213f0000 50
mbed_official 161:09d8213f0000 51 }