how do i represent null values in ASCII

[james bluetouch]

I can represent the following characters in ASCII

\b Backspace character (ASCII 8)

\f Form-feed character (ASCII 12)

\n Line-feed character (ASCII 10)

how do i represent a null (i can't just leave it out)?

I'm trying to control a projector (hardware) from the com port.

I have solved most of the problem but need to send null values as part of the trigger.

Thanks in advance

James

[stealthelephant]

0 == null in c++ so maybe ascii too?

[james bluetouch]

thanks dude... doesn't seem to work tho... it sends out the null as individual HEX codes.

The closest i can to it was '\x00' as part of a the command string

\xBE\xEF\x02\x06\x00\x13\xCE\xAA\x30\x30\x30\x30\x 30

the problem with this is that when i send it out of the com port the string is cut off at the '\x00', leaving out the rest of the string.

If i just don't include the null the string is wrong as it has to be that length. Also if i substitute the null for another value the string is also wrong.

doh...

[ericlin]

I tried various methods. It is interpretated either as null terminating char or "";

If we have 00 in text file that we loads in, it is treated as null terminating character. The effect is truncating the string.

"\x00" or unescape("%65%00%65") does the same thing - truncating.

While chr(0), String.fromCharCode(0), "\u0000" are interpretated as "";

So, there is no "null" character.

:)
Long ago, I tried to manipulate "binary" data through Flash. I would have been able to load executable binary into Flash and modify it freely if Flash accepted 00 character.

[james bluetouch]

thanks dude... looks like this is gonna be a mother of a problem to solve.. :cool: