Greetings Monks

I'm trying to collect and process binary data collected from the serial port. The data can range from 0x00 to 0xff. I am using Device::SerialPort and I seem to be receiving the data with no problem. But, I am getting nowhere trying to use the data.

I seem to be getting the binary data into a variable $ibuf. In an attempt to see a byte or two of the data I use the following line of code hoping to display the hex-text representation of the data in a Tk window.

$ibuf_display = sprintf("%x ", substr($ibuf, 1, 1));

With this I get the following (or similar) error messages:

Argument "^C" isn't numeric in sprintf at (program_name) line (line_number)

As far as I know Perl should just have "data", so this looks like a "sprintf from C" issue. But I don't know what to do about it.

As I go downstream I will be interested in doing the following:

1) Display data in "human friendly" form. This would be 0x03 for the ^C that was in the error message above.

2) Use if ( ) conditionals to process the data.

Any suggestions would be appreciated. Somehow I haven't yet tripped accross this while Googling.

Thanks,
Bruce

In reply to using sprintf to print binary data collected from the serial port by Bruce32903

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