>
>> Does anyone know how to implement auto baudrate detection
>>
There are three common algorithms that I know of for doing autobaud:

1) As you describe, step through appropriate bit rates till you don't
    get errors.
2) As above, except use the results in the shift register to glean
    "hints" of the likely bit rate; just as output at the wrong speed
    looks like garbage, specific input can also look like specific
    character(s), and you can usually detect a fairly large range in
    two keypresses or so.  Subject to lossage if there are unusual
    parity/stopbit configurations, or particularly large ranges of
    possible speed.
3) time the initial bit(s), either using the uart input as a gp input,
    or with dedicated hardware of some kind.  If you use any odd char
    as your speed select character, you'll be timing the single start
    bit of the character...

(Does anyone remember tymnet?  When you dialed in, they had a magic
prompt that showed up without garbage characters regardless of your
serial speed.  I always figured that this was clearly possible, and
somewhat interesting, but always wondered what the exact algorithm
was...  (of course, in those days, the variety of likely speeds was
pretty limited.))

  BillW

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