G-Code Macro String Prompt

[qjones]

I am working on a custom macro where I would like to prompt the user for a string. I believe I am doing this correctly and writing it to a #300+ user variable. I have googled for a bit and I cannot find an example of an IF, THEN block that can branch using a string. I get an error when this processes. It works fine if I use a numerical value, like "Press 1 for X, and 2 for Y". But I cannot get something to work with where you could just specify a string "X" or "Y" and branch on a string/character. If anyone has any tips let me know.

Thanks,

[Ken Rychlik]

What are you trying to get your macro to do?

[tblough]

Code: Select all

IF [#300 == 78] THEN GOTO 1000 ; if "N" skip next part

--edit - changed typo #200 to #300

[qjones]

I have several macros I am working on and I have no issue getting them to work. I would just like to change out some of the user prompts for strings to clean things up.

So it looks like we can just use the ASCII value of the character. I thought this might be the case but was having a hard time getting my code to work right to verify it. I don't see though where we can use #200 as a user variable though. Is this generic GCODE or known to work with the acorn? I see that user variables #300-#399 are for String Literals is that the variable type I should actually use?

Thanks,

[Centroid_Tech]

You can't use a string as a condition. If the operator is using a single letter then you can have that as a condition as long as you are checking the ASCII value of that letter.

Typically, user variables are #100 thru #159. User variables #150 thru #159 are stored in non-volatile memory which means that those variables will remain even after the system loses power. User variables #100 thru #149 will initialized to 0 at the start of job processing. User variables #300 thru #399 are string variables but these variables are more intended for display purposes.

I am going to assume that tblough code may have had a typo as #200 is not a valid user variable for a Centroid system and if you try to run that code, you should be getting an "Undefined variable" message.

[qjones]

Okay thanks for the clarification. So if you are receiving an ASCII single letter code it is best to prompt for a #100+ variable and not a #300+ string variable correct?