Agnes en Henk Tobbe wrote:
>
> >- Has anyone who bought the $20 GPS units done a master reset and then had
> >successful subsequent operation?
>
>     Yes, I have done a master reset and it took a couple of hours  before
> the unit seemed to be able
>     to know where it was again. (The reset was done by means of the 20$GPS
> VB programme). At
>     first I thought "Well that was it then....", So do not dispair....
>
> >- Are there any users in the Southern hemisphere?
>
>     Yes, 32.782989 degrees South. (152.107697 degrees  East = NSW Australia)
>
> While on the subject: Someone made a PIC driven unit to convert to NMEA
> standard. I do  not
> want that standard. Just data to a LCD but am not very good in mathematics.
> Has anyone done
> the conversion from 4 byte real (units 1/256 seconds) to degrees, minutes
> and seconds in a PIC
> in assembler?
> It would look something like ((B1*256^3)+(B2*256^2)+(B3*256)+B4)/3600)/256.
> Would a simple
> 16F84 be able to do that?
>
> Henk VK2GWK (PA0ADC)

On that math, no problem on an 'F84;  what you're talking about is
simply generating a 32-bit number from the 4 bytes B1, B2, B3, B4, then
dividing it by 3600 and by 256.  You can start off by doing the divide
by 256 (just shift the decimal place - B4 is now to the right of the
decimal place) - then divide by 3600.  Scott Dattalo or someone probably
has a better way here, of course.

  Mark

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