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I am trying to use Teraterm rs232 comport. when I am running MDK Arm Software to download the program or in debug mode. The problem I see is that the ULINK2 can not be accessed when I set TeraTerm to the comport where I have a USB adapter to RS232 interface.
As soon as I close Teraterm the ULINK2 can be accessed.
This problem started occurring when I had to reinstall the MDK ARM software because I tried to install the free STM Lo version. and lost the MDKLite license. So I just uninstalled the MDK version and reinstalled it again to get back the MDK Lite license.
Thank You, Ron. I think it is a good idea to make a special rs232 cable to with only the rx and tx wires hooked up. So that the other pins are floating.