Problem with ASCII String and Serial Ports

[danielkelly]

I am trying to communicate with a serial device using Net Framework 2 and the Serial Port Class. I have a protocol definition written in VB which I am having problems converting to C#. The main problem I seem to be having is in the ASCII conversion.

The VB code is Chr$(255) //Hex Value 255
I thought the C# equivalent would be Convert.ToChar(255) however when I use a com port viewer, it is showing a different character to the VB Code.

Can anyone help me in how to achieve the above using the serial port class.

The eventual goal is to create a string of characters to output using the port.Write Method of the SP Class.

Thanks in advance

 

[chiph]

ASCII is only valid in the range of [0..127], so there's your problem.

You're probably sending an array of Byte to the comm port, right? If so, just create a byte value of 255 and add it to the array.

Chip H.


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[danielkelly]

Thanks, Im still a bit confused. Could you possibly put a small snippet of code so I can try and get my head around it.

Thanks