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"The WakeUp timer interrupt doesn't run after the MCU wakes up from standby mode."

chai2145
Associate III

‎2024-10-02 07:09 PM - edited ‎2024-10-02 07:11 PM

Hi,

Does anyone know if it's normal for the RTC_IRQHandler not to trigger when the MCU wakes up from standby mode using the wake-up timer? I tried setting a breakpoint in the RTC_IRQHandler, but the problem is that it doesn't hit the breakpoint when the MCU successfully wakes up.

Below is my code.

 

Thanks!

chai2145_0-1727920790399.png

chai2145_1-1727920868314.png

chai2145_2-1727921311090.png

 

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4 REPLIES 4
TDK
Guru

‎2024-10-02 08:05 PM

Is it enabled? HAL_NVIC_EnableIRQ and relevant flag in the RTC peripheral.

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chai2145
Associate III
In response to TDK

‎2024-10-02 08:41 PM - edited ‎2024-10-02 08:47 PM

Yes, have added the following lines in RTC init

chai2145_0-1727927195824.png

 

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chai2145
Associate III
In response to chai2145

‎2024-10-02 09:04 PM

It hit the breakpoint if only I removed the line to enter standby mode.

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Tesla DeLorean
Guru

‎2024-10-03 12:14 AM - edited ‎2024-10-03 12:16 AM

Exiting STANDBY is via a RESET

Assume everything is destroyed and needs to be enabled. RTC should maintain time and content, and use LSE.

Don't assume the debugger will survive the power off and reset. Instrument via a serial port to understand what's going on internally.

Look at CubeL0 examples for STANDBY and try those

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