Most likely some control signals (CTS,RTS,DTR,DSR) have incorrect state.
Expert
Re: QExtSerialport reads junk char's through UART first time after booting PC
Most likely some control signals (CTS,RTS,DTR,DSR) have incorrect state.
Novice
Re: QExtSerialport reads junk char's through UART first time after booting PC
yes .. checked that ... i have disabled both DTR & RTS
Still same problem..
Expert
Re: QExtSerialport reads junk char's through UART first time after booting PC
After opening the port (line 18) read potential garbage. You do not know what are the parameters of the port (speed, parity etc.) before programming. If the second side send something on your side will be garbage. The port is still active and supported by the operating system and driver.
I think that Hyperterminal do this for You. This is normal.
Advanced user
Re: QExtSerialport reads junk char's through UART first time after booting PC
You are wrong using QtSerialPort! First, need open device, and second - configure it!Sorry i forgot to mention.. I have tried QSerialPort (QSerialDevice) also... result is same...
Please read documentation.
Beginner
Re: QExtSerialport reads junk char's through UART first time after booting PC
Thanks Very Much
I was configuring it first then opening it.
But it was Vice Verca.
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