Posted on May 17, 2011 at 13:16st7, Thank you for the answer. I made an additional test. With hyperterminal (I know, not the ''best'' terminal program) and with ZOC the problem is the same. The only difference to the application is, that this progra...

Posted on May 17, 2011 at 13:16I made an application with a STM32F103RBT6 based on the USB Virtual COM port demo. On PC side the CDC driver release 1.1.0 is installed (which seems to be the microsoft virtual com port driver). The communication works...