Reset does not happen after flashing

[STuser2]

In one of my hardware i am facing the following intermittent behavior, after flashing using debugger, the control does not come to the starting point after main (Hal_init() function), it gets stuck up in assembly code, there is a micro reset button in STM32Cube Ide in debugging mode, when i click that it comes to the starting point after main. Once i remove the debugger and start testing, similar behavior is observed when i do power on and off, sometimes the code executes normally but sometimes the code does not reset, i need to do several power on / off sequences. Is it software or hardware problem? How do i correct it?

[mƎALLEm]

Hello,

In one of my hardware

What do you mean by that? you have several boards with the same hardware but you have an issue with only one bord?

[STuser2]

Sorry no i have only one board, i was saying i used ST hardware before but i have never faced such issue.

[TDK]

It sounds like your BOOT0 pin is floating. It should be pulled down to execute user code. See AN2606 for details.

A screenshot of when it’s “stuck in assembly code” would confirm. Or a schematic.

[STuser2]

I have configured the boot pin PB8 as output, i have to update option bytes i suppose, what should i write into option bytes, which tool i have to use?