Is there a setting that it won't download the program to mcu before debugging?

[ZZhi .1]

Everytime to debug a program cubeIDE always downloads the program to mcu first no matter the program had not been modified since last download, is it possible to seting the IDE only downloads the program when the program has changed?

[TDK]

No way you download only if changed since last download. You could create a script that did this, but it would take some effort.

To debug your program without downloading it:

Go to Debug Configurations... -> Startup -> select load image -> Edit... -> uncheck Download

To debug without resetting the device:

Go to Debug Configurations... -> Debugger -> in Reset Behavior, select "None"

[Peter BENSCH]

To emphasize again: uncheck Download will not download a changed program to the target either, so that this option has to be activated again for a new download.

[TDK]

One option is to have the “Run�? configuration always download and run this prior to the “Debug�? if it needs updated.

[ZZhi .1]

Thank you very much, it works, that is what I need.