Bootloader and Ymodem

[Minkyu Kim]

Hi,

I'm study bootloader.

using STM32F401RE at windows10.

when i download bin file, below picture error occured.

i attach my bootloader and application.

best,

Kim

[mattias norlander]

Hi Minkyu,

Are you connected with the debugger to the target?

You can attach to a running target assuming you don't load any binaries or perform any reset operations in the debug configuration. This would allow you to halt the CPU with the debugger at the state you show in the screenshot to see where you are...

If this does not give a clue try to launch a new debug session and try to narrow down the problem.

I do not have the board available to test your code.

Kind regards, Mattias

[Minkyu Kim · Accepted solution]

Hi Mattias,

Of course, Yes I am.

This problem solved by my head. Just change code like below picture.

But I am wondering how this change solved the problem.

Best regards,​