Michael Walker / Mbed 2 deprecated NucleoStandbyTest

Test of the Nucleo boards standby mode. sleep() and deepsleep() use the STM32 SLEEP and STOP modes. This uses the 3rd low power mode STANDBY. Utilises the WakeUp code here: https://developer.mbed.org/users/Sissors/code/WakeUp/ Adds a ClearWakeUp so that Standby can be entered repeatedly.

Dependencies:   WakeUp mbed

main.cpp

Committer:
MichaelW
Date:
2016-05-07
Revision:
1:085a87258f10
Parent:
0:1ecaa40f74d0

File content as of revision 1:085a87258f10:

#include "mbed.h"
#include "WakeUp.h"

DigitalOut myled(LED1);

void ClearWakeUp(void);

int main()
{
    myled = 1;
    wait(0.2);
    myled = 0;
    wait(0.2);

    //The low-power oscillator can be quite inaccurate on some targets
    //this function calibrates it against the main clock
    WakeUp::calibrate();


    WakeUp::set_ms(5000);
    ClearWakeUp();

    printf("Entering Standby Mode\r\n");

    HAL_PWR_EnterSTANDBYMode();
    
    //This will never be executed
    printf("After sleep\r\n");

}
void ClearWakeUp(void)
{
    PWR->CR |= PWR_CR_DBP;      //Enable power domain
    RTC->WPR = 0xCA;            //Disable RTC write protection
    RTC->WPR = 0x53;

    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);

    RTC->WPR = 0xFF;        //Enable RTC write protection
    PWR->CR &= ~PWR_CR_DBP; //Disable power domain
}