Typecast , Rounding issues with printf...

[tristan]

I want to be able to adjust a timer value ranging from 0.0 Seconds to 25.5 seconds with a 0-255 byte variable (tim_val) using printf to show the value on the LCD with one decimal point.

Here is my fprint display line :

printf(lcd_putc,"\fT%C: \n%S %2.1f Sec",timer_num,LCDMSG[12+language],(float)tim_val/10); // display Timer adjust screen

The problem is that this works fine most of the time ... but:

0.7 , 0.9 , 1.4 , 1.8 , 1.9 , 2.3 , 2.8 , 3.3 , 3.6 seconds and so on won't show up...

I used %2.2f Sec instead to figure out what was going on, i saw that:

After 0.60 comes 0.69 ,
After 0.80 comes 0.89 ,
After 1.30 comes 1.39 and so on...

Is there a simple way to fix this and get (0.0 TO 25.5) in 0.1 second increments displaying properly on the LCD?

Thanks...

[PCM programmer]

I made a test program using PCM vs. 3.225 and it works OK.
Look at how I do the math in the printf() statement. I make
certain that the compiler knows that "10" is a float, by writing
it as "10.0". I also make the compiler round off the result
properly by adding half of your desired precision (on the right
side of the decimal point) to the result.