Dear Sean,

I received its solution proposal for my problem, only that I didn't understand
very well, as to use a routine of floating point.
It is probable that due to my lack of experience in division with floating point
is hindering my understanding.
I please request its help in this point, if it is possible..

Respectfully,

Joco Batista

Sean Breheny wrote:

> Now, of course, this would require floating point division and floating
> point comparison, and there are ways to make this better for the PIC:
>
> 1) Don't put floating point values of Vb into the table. Instead, store the
> actual code that you will get from the ADC.
>
> 2) Instead of picking the values of the table to be evenly spaced as far as
> PSI goes, pick them to be evenly spaced as far as Vb goes, and pick them so
> that the number which you get from the ADC has zeros in as many of its
> lower bits as possible (so if the interval between table ADC values is,
> say, 4, and you start at a multiple of four, then the lowest two bits of
> each table ADC value will be zero) This allows you to eliminate the
> floating point compare from the table lookup process. You can just see if
> the upper 6 bits of the value you read from the ADC are the same as the
> upper 6 bits of a value in the table, and select that one.
>
> I know that this is not very clear. Please feel free to email me privately
> and I will explain it further.



> Sean
>