Dear All, Who know how hyperterminal identifies input state of cpu connected to PC via serial port ? For example when codes in CPU reaches to scanf() func. the hyperterminal switches to input situation and is ready to receive data from user without any extra data exchanging . Regards. Majid
And what makes you believe you're "unable to type" in that situation? What actually happens if you type something? Test it ! How do you propose I could do that, with you not leaving even the slightest hint what kind of device and program you're talking about, here? You may be confusing this with handshaking protocols used on serial lines. It depends on what your "CPU" is, how exactly it's linked to the PC, and how you configure the terminal program.