Blank FPrintF Changes Configuration?

[Geps]

Hi,

I'm writing a program for an 18f4520 using compiler version 4.087 and after commenting our various fprintf() (I have 2 s/w implemented uarts) that I used for debugging I noticed my program wasn't working.

Going through the program I've managed to narrow the problem down to an fprintf statement.

With the following statement:

[asmboy]

you are not showing the code actually generated by your problem fprintf
are you ??

i assume it all works with fprintf(TC,"\r\n");

so what is the programmatic purpose of printing a null without printing
an actual asciiz ???

[Geps]

No, I looked through the code and quoted those from the top of the file. When the line is commented out the compiler does skip through it and there is no assembly listed.

I can test that code in a couple of hours and let you know.


At the moment it's to stop it hanging - originally the program worked when there was text in there to print, I commented it out and it hung so I kept removing letters and found out that even though nothing gets printed it gets around this hanging problem.

[jeremiah]

Perhaps you have a non null terminated string somewhere?

Mind you, this is just a guess since you aren't providing a small program that shows the problem.

Could you post a small completely compilable program that duplicates the problem? It would help those here with debugging the issue.