Hello Anders,
thank you for the advice. Now the char is sent back between 0.055mS and
0,089 mS after the serial port receives the char (@19200). The response
time fluctuates though between those two values in "regular" (periodic) way.
What could be the cause for this fluctuation?
Anyway now I am within the 3bits limit :). thank you very much once again.
evgeni
> The problem is not the driver but the way the register in the serial port
is
> set up.
> The UART does not generate a interrupt for every char it recived if it
has't
> been
> tould to do so. It is the register for the input fifo.
> I think this is what happens. ->
> the computer recives a char.
> It does NOT make a interrups at once but wait's.
> It ganerate a interrupt when "No Charecters have Been removed From or
input to
> the RCVR FIFO During the last 4 Char."
> (thats 1/(19200/10bits) ~2mSec.)
> The driver catch the interrupt. do what ever you wont it to and send a
byte
> (0.2~ mSec).
>
> I can't remeber if it is posible to set the number of chars before
interrups
> with the rt_setup call. If not you have to make some minor changes in the
> driver.
>
> Anders Gnistrup
>
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