István Kövesdi

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8 years, 4 months ago.

Program disapeared from FLASH after removing power

When powered from USB of a PC and program blinks led in a while(1) cycle, then the removal of USB connection results in a state that program is not starting again when power (via USB) is restored. When checked with ST-LINK, it seems that the binary program disapeared from FLASH. Is this normal behaviour, and if so, what software solution is recommended to handle unpredictable power outs?

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Last updated: 20 Apr 2021
Affordable and flexible platform to ease prototyping using a STM32F411RET6 microcontroller.

Hi István,

What method are you using to program the Nucleo board? The behavior you're seeing does not sound normal to me if you're using drag and drop programming.

Thanks, Brian

posted by Brian Daniels 15 Dec 2015

1 Answer

István Kövesdi
poster
8 years, 3 months ago.

Hi, Brian

I Copy/Paste the bin image from the Downloads folder to the Nucleo drive.

The described behaviour is not random, It can be reproduced every time I remove USB connection while the program is running. I will check it with E5V setup. (And I will try drag and drop, as well)

Regards, István

Accepted Answer

I had similar problem and since I have added an external power supply it simply works

posted by Erastus Coetzee 05 Jan 2016

Assigned to István Kövesdi 8 years, 3 months ago.

This means that the question has been accepted and is being worked on.