It used to be that opening a serial port only set RTS and DTR if it was a "first open". If the port was already open, subsequent opens didn't mess up RTS and DTR. This was a very useful behavior in the embedded world where RTS and DTR are often used to power and or control things (reset lines, mode controls, line driver enables, etc.). This seems to have changed, and now _every_ open sets RTS and DTR even if the port was already open and RTS and DTR had already been put in the desired state. Is there no longer any way to open an already-open serial port without changing the state of RTS and DTR? What was the reasoning for breaking user-application backwards compatiblity like that? -- Grant
