Hi Ed,

Could you explain a bit more what you are trying to do? 14 bit words means
each address addresses 14bit words, other words you do not need division or
whatever to pick up one byte. Or you are trying to split up the bytes to bit
streams to compress the data (and reading the flash with eeprom reading
method)?

Tamas



On Thu, May 8, 2008 at 4:59 PM, Ed Sutton <esutton@engius.com> wrote:

> Are there other ways to implement a divide by a 14 constant other than
> cycle-chewing subtraction loops?
>
> I want to use the PIC16F flash consisting of 14-bit words to store 8-bit
> data.  I can implement the multiply-by-8 as a shift.  The crux of the
> problem is basically the divide by a constant of 14.
>
> Pseudo Code ( actual code will likely be assembly )
>
> wordOffset = 8*byteOffset / 14;          // The integer result
> wordBitOffset = 8*byteOffset % 14;   // The remainder result
>
>
> Patterns:
>
> The 14-bit words and 8-bit data have a common multiple of 56.
> The wordBitOffset pattern { 0,8,2,10,4,12,6 } repeats every 7-bytes.
> I can't see a solution but it is an interesting puzzle.
>
> Thanks in advance for any tips or suggestions,
>
> -Ed
>
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-- 
Rudonix DoubleSaver
http://www.rudonix.com
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