> This sounds like you have fallen into the standard big black hole that is
> mentioned in Fr macGhees serial code (someone gave a URL for it in the last
> couple of days)
>
> You have to send at least one character when you do the init code for the
> serial port, else the TRMT never goes true to fire an interrupt to load the
> next character :)))))))))
>

Hello Alan

but I do NOT want to use an interrupt caused when one character is
transmitted. I find it quite confusing that the serial transmission
works fine when no or very few comparator interrupts are triggered
during a certain timing period. The blocking only occurs when a certain
interrupt rate is exceeded.

regards
Markus


p.s. Tom McGahee recommends to send a dummy-value to get TXIF high, so
that the send routine can work. In my applicaltion I'm polling for the
TRMT - flag. And according to the datasheet this is not affected by any
interrupt events, or have I missed something?

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