On 4/2/2015 4:51 PM, Jasen Betts wrote:
On 2015-04-02, rickman wrote:
On 4/2/2015 6:48 AM, Jasen Betts wrote:
On 2015-04-01, rickman wrote:
On 4/1/2015 6:31 PM, Jim Thompson wrote:

Do a search on the Xilinx web site for app notes on LFSR. Peter Alfke
published one which adds a few gates to specifically inject the zero
state....

yeah, but no LFSR visits all states.

You haven't seen the app note. Why can't it include the zero state with
modification?

I think there's something about linear feedback that requires the
cycle length to be odd.

The key word there is "something". Technically once you make this mod
it is not an LFSR anymore. But that is what the OP wants, something
that is *not* an LFSR because the LFSR only covers 2^N-1 states and he
wants 2^N.

A rose by any other name....

--

Rick