Serial port encoding

[Jack Russell]

I am trying to use the serial port control to send and receive 8 bit
characters to/ from a n instrument. whatever I set encoding to it
converts the characters.

Any ideas how to stop it?

Thanks

Jack Russell

 

[Armin Zingler]

I am trying to use the serial port control to send and receive 8 bit
characters to/ from a n instrument. whatever I set encoding to it
converts the characters.

Any ideas how to stop it?

Can you give an example of the sent/received data? How did you find out that
it gets converted? How do you send the data (code)?


Armin

 

[Jack Russell]

Can you give an example of the sent/received data? How did you find out
that it gets converted? How do you send the data (code)?


Armin

I use a serialport sniffer program
(http://www.serial-port-monitor.com/index.html)
fantastic piece of freeware.

To output I use
serialport1.write(String)

I have found that if I set encoding to zero it seems to work
serailport1.encoding=encoder.getencoding(0)
although the documentation seems to state this is an illegal operation!

 

[Armin Zingler]

I use a serialport sniffer program
(http://www.serial-port-monitor.com/index.html)
fantastic piece of freeware.

To output I use
serialport1.write(String)

I have found that if I set encoding to zero it seems to work
serailport1.encoding=encoder.getencoding(0)
although the documentation seems to state this is an illegal
operation!

Which encoding does the device expect?


Armin

 

[Jack Russell]

Which encoding does the device expect?


Armin

This is the point, I and a lot of other people use serial ports to
transmit binary data, we do not want any encoding. According to the help
files the default is 7 bit ascii, but you can set the various unicode
alternatives. The help file says that setting 0 gives the "default"
which is patently not true

 

[Armin Zingler]

This is the point, I and a lot of other people use serial ports to
transmit binary data, we do not want any encoding.

If you send strings, they /do/ have an encoding. Every character does have a
number (one or two bytes).

Only zero-length strings don't have an encoding.

According to the
help files the default is 7 bit ascii, but you can set the various
unicode alternatives. The help file says that setting 0 gives the
"default" which is patently not true

"Default" usually means "ANSI" code page, which you can get from
System.Text.Encoding.Default.

In any case you must know which encoding the receiver expects.

As you probably know, Strings are stored as Unicode (2 bytes), so if you
want to send them with any other encoding, you must convert to an array of
bytes (Encoding.GetBytes).


Armin

 

[Jack Russell]

If you send strings, they /do/ have an encoding. Every character does
have a number (one or two bytes).

Only zero-length strings don't have an encoding.



"Default" usually means "ANSI" code page, which you can get from
System.Text.Encoding.Default.

In any case you must know which encoding the receiver expects.

As you probably know, Strings are stored as Unicode (2 bytes), so if you
want to send them with any other encoding, you must convert to an array
of bytes (Encoding.GetBytes).


Armin

Sorry, I am not sending "strings" I am sending binary data. This is very
common with serial port applications. I want the 8 bits to be sent
exactly as is with no "translation". Every other serial port "driver" I
have ever seen can do this why cant .net

 

[Armin Zingler]

Sorry, I am not sending "strings" I am sending binary data.

You wrote:

serialport1.write(String)


I thought String means String. Now you write, you don't send a String.
What's right now?


Armin

 

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

This is the point, I and a lot of other people use serial ports to
transmit binary data, we do not want any encoding. According to the help
files the default is 7 bit ascii, but you can set the various unicode
alternatives. The help file says that setting 0 gives the "default"
which is patently not true

The solution is very simple. If you want to send binary data, send
binary data. Don't send it as a string, send it as a byte array.

 

[Jack Russell]

The solution is very simple. If you want to send binary data, send
binary data. Don't send it as a string, send it as a byte array.

Thanks, just what I wanted. I should have fully read the help file I
suppose, too many years of fooling devices so it never occurred to me it
would be that easy!

Thanks again

Jack Russell