shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/sleep.c@60:142c6c6f5949, 2013-12-17 (annotated)

Committer:
mbed_official
Date:
Tue Dec 17 08:45:10 2013 +0000
Revision:
60:142c6c6f5949
Child:
70:c1fbde68b492
Synchronized with git revision 572b22395f1ebb513f4fbd423214cb39a18dc58b



Full URL: https://github.com/mbedmicro/mbed/commit/572b22395f1ebb513f4fbd423214cb39a18dc58b/



[NUCLEO_F103RB] InterruptIn, Sleep, RTC added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 60:142c6c6f5949 1 /* mbed Microcontroller Library
mbed_official 60:142c6c6f5949 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 60:142c6c6f5949 3 *
mbed_official 60:142c6c6f5949 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 60:142c6c6f5949 5 * you may not use this file except in compliance with the License.
mbed_official 60:142c6c6f5949 6 * You may obtain a copy of the License at
mbed_official 60:142c6c6f5949 7 *
mbed_official 60:142c6c6f5949 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 60:142c6c6f5949 9 *
mbed_official 60:142c6c6f5949 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 60:142c6c6f5949 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 60:142c6c6f5949 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 60:142c6c6f5949 13 * See the License for the specific language governing permissions and
mbed_official 60:142c6c6f5949 14 * limitations under the License.
mbed_official 60:142c6c6f5949 15 */
mbed_official 60:142c6c6f5949 16 #include "sleep_api.h"
mbed_official 60:142c6c6f5949 17 #include "cmsis.h"
mbed_official 60:142c6c6f5949 18
mbed_official 60:142c6c6f5949 19 static void SYSCLKConfig_STOP(void)
mbed_official 60:142c6c6f5949 20 {
mbed_official 60:142c6c6f5949 21 ErrorStatus HSEStartUpStatus;
mbed_official 60:142c6c6f5949 22
mbed_official 60:142c6c6f5949 23 RCC_HSEConfig(RCC_HSE_ON); // Enable HSE
mbed_official 60:142c6c6f5949 24
mbed_official 60:142c6c6f5949 25 HSEStartUpStatus = RCC_WaitForHSEStartUp(); // Wait till HSE is ready
mbed_official 60:142c6c6f5949 26
mbed_official 60:142c6c6f5949 27 if (HSEStartUpStatus == SUCCESS) {
mbed_official 60:142c6c6f5949 28 RCC_PLLCmd(ENABLE); // Enable PLL
mbed_official 60:142c6c6f5949 29 while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) {} // Wait till PLL is ready
mbed_official 60:142c6c6f5949 30 RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // Select PLL as system clock source
mbed_official 60:142c6c6f5949 31 while(RCC_GetSYSCLKSource() != 0x08) {} // Wait till PLL is used as system clock source
mbed_official 60:142c6c6f5949 32 }
mbed_official 60:142c6c6f5949 33 }
mbed_official 60:142c6c6f5949 34
mbed_official 60:142c6c6f5949 35 void sleep(void)
mbed_official 60:142c6c6f5949 36 {
mbed_official 60:142c6c6f5949 37 SCB->SCR = 0; // Normal sleep mode for ARM core
mbed_official 60:142c6c6f5949 38 __WFI();
mbed_official 60:142c6c6f5949 39 }
mbed_official 60:142c6c6f5949 40
mbed_official 60:142c6c6f5949 41 void deepsleep(void)
mbed_official 60:142c6c6f5949 42 {
mbed_official 60:142c6c6f5949 43 // Enable PWR clock
mbed_official 60:142c6c6f5949 44 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
mbed_official 60:142c6c6f5949 45
mbed_official 60:142c6c6f5949 46 // Request to enter STOP mode with regulator in low power mode
mbed_official 60:142c6c6f5949 47 PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
mbed_official 60:142c6c6f5949 48
mbed_official 60:142c6c6f5949 49 // At this stage the system has resumed from STOP mode.
mbed_official 60:142c6c6f5949 50 // Re-configure the system clock: enable HSE, PLL and select
mbed_official 60:142c6c6f5949 51 // PLL as system clock source (because HSE and PLL are disabled in STOP mode).
mbed_official 60:142c6c6f5949 52 SYSCLKConfig_STOP();
mbed_official 60:142c6c6f5949 53 }