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Serial 7 data bit caused Argument Exception on SerialPort.Open()

Started by banalogic, Jun 25 2013 06:48 PM

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#1 banalogic

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7 posts

Posted 25 June 2013 - 06:48 PM

The following code Open() call thrown an ArgumentException:

SerialPort comm1Port = new SerialPort(SerialPorts.COM1, 38400, Parity.None, 7, StopBits.One);

comm1Port.Open();

Exception Stack Trace:

System.IO.Ports.SerialPort::InternalOpen

System.IO.Ports.SerialPort::Open

SerialSelfTest.Program::Main

I tried both 4.2 and 4.3 with the same behavior. It appears the SDK only allows 8 databits.

#2 ziggurat29

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244 posts

Posted 25 June 2013 - 07:23 PM

to wit, the processor's usarts support 8 and 9 bit modes only; maybe if you had parity, you could emulate it with an 8 bit mode, but you have no parity, so I think probably not; or maybe you can make it look like an extra stop bi.? Interfacing to an ancient device?