>Does anyone know how accurate and/or if there are any bugs in the software
>presented in the "Embedded Control Handbook" pgs 5-11 to 5-35 by Frank
>Testa. If you have been able to implement this software successfully, please
>give me a "e-mail".
>
>Where can I download pic-related software from the net.
>
>Cheers
>Norman

Hi Norman (and everybody else).
I've implemented the 32 bit routines and they seem to work ok. Most of the
times, the error is on the least significant bit of the 24 bit mantissa. The
worst error that I've detected still gives 5 decimal places of accuracy. How
did I tested it? Well, I wrote a program in a PC that converts the numbers
on the PC (I use Turbo Pascal, type single) to the format used by the routines,
send them to a PIC16C84 together with an opcode (add,sub,mul,div,int2fp or
fp2int). The PIC then makes the operation and sends back the result. I then
convert it to the PC format again, display the result and execute the same
operation on the PC and compare the results. On these routines, I've not
detected any bug, I just added some code to sign extend the fp2int conversion
to make produce a 32 bit signed integer. I dont know if this helps but it may
indicate that the author (Frank Testa) probably did the same with the 24 bit
routines (i.e. a good job).

Fernando Soares