Handling Negtive numbers

[cam_male2003]

Hi All:

I feel stupid asking this question, how do you handle negitive numbers. I have an if statement the says if(pressure<LoPoint){lo_point_flag=1;} When the pressure is negitive it does not work.. I am sure it simple, but I pulling out the only hair I have left, trying to find the answer... Oh all varables are signed long.

Thanks all

CCS 3.249
Pic18lf2520

[jma_1]

Greetings,

If you define your pressure as an int8, int16, or in32 they are by default unsigned. The A/D conversion from a PIC only returns positive values. Without more information I cannot say what the problem is.

Cheers,
JMA