Tag Archives: Embedded Processor Programming

sprintf or printf do not output float variables correctly

Have you run into situation under the MPLAB IDE where you are trying to output variables, but even though you have the format correct, a float variable outputs with a .0 value?


(from somewhere else in code)
float adjustedtemp= 0.0;
adjustedtemp= (AIRTEMP + 5)/10;
printf("Air Temp: %5.2f \r\n", adjustedtemp);

the result looks like this

Air Temp: 75.00

when it SHOULD look like this

Air Temp: 75.60

this is due to a bug in the way MPLAB handles floats.

Two easy ways to fix it:


adjustedtemp= (AIRTEMP + 5.0)/10.0;



adjustedtemp= ((float)AIRTEMP + 5)/10;

Either of these methods will result in the correct value being displayed during your sprintf() or printf() command.

PIC XC8 error warning: (1472) –CODEOFFSET option ignored: duplicate or conflicting option

If you receive the following error during an XC8 project build, here is how to fix it


warning: (1472) –CODEOFFSET option ignored: duplicate or conflicting option


the fix:

under project properties, XC8 Linker, make sure there is either

a) no value (blank) in the CODEOFFSET field

b) some legitimate value in CODEOFFSET that works with your bootloader


a ZERO — 0 — as pictured will cause this error during build.