Wake up from interrupt when use a keypad in polling mode

[bfran.1]

In my design i have 5 gpio that connecting my keypad , i have 3 row (gpio output ) an 2 col how input , one button keypad is ON/OFF.

For me the OFF state corrrespond to sleep state .

This is my problem -

Before of while i enter i sleep mode :

void PWR_EnterSleepMode(void)

{

/* Suspend tick increment to prevent wake up by SysTick interrupt. */

HAL_SuspendTick();

/* Enter Sleep mode. */

HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFE);

/* The codes below will be executed only after waked up from the Sleep

* mode. */

/* Resume tick interrupt if disabled prior to sleep mode entry. */

HAL_ResumeTick();

}

Then how wakeup my STM32l1 from sleep if I defined my gpio how input and output gpio .

The Mcu wake up just if hear a interrupt event (is right?)

I don't know.

Yu can help me .

BR.

[Vangelis Fortounas]

Hello

Connecting a keypad like you wrote, implies an allways running scanning code.

An aproach to solve this is to use the col input on/off key's pin with EXTI to produce interrupts both edge.

Just before put mcu to sleep ensure that row output on/off key's pin is not in analog state but other rows are.

After wakeup from sleep, restore the functionality of rows and columns.

[bfran.1]

Thanks

this is my problem

I put power sleep before while loop

When i Press the button the led of callback lighted but then i stopped here with led lighted and I not entry in while loop.

WHY?????

I post my code .

Thank

[Vangelis Fortounas]

unfortunately source file is empty

[bfran.1]

SORRY

[bfran.1]

I will also send you the ioc file if there is any wrong sleep setting for the wake up gpio