Re: Queued SCI with Interrupts on MPC555

Hello

I have experience with MPC565 but it should be the same since i was
porting code from MPC555. The only tricky stuff is that SCI has 2 serial
ports that share some registers, but once made properly it works.
Actually MPC565 has 2 SCI so I am able to run all 4 serial ports
simultaneously.

Imho the main topic is IRQ strategy i.e. what do u do upon interrupt.
Shall u process 2 channel interrupts independently, even if you have
pending irq from both - or all at once. First approach is simpler since
you can debug 1 channel and just clone the same stuff to other. Second
approach should decrease interrupt load but is harder to debug. I
followed KISS philosophy so I took 1st approach and i can say that there
aren't problems up to 115200 (I haven't tested higher rates).

Best regards
Ilija

David Eicher wrote:
> Hello,
>
>
>
> Anyone have any experience with the subject matter? I've followed the
> examples in the demo code in the quickstart package, the top half and
> bottom
> half interrupts/flags just don't seem to work they way they suggest. The
> users manual for MPC555 doesn't give a lot of detail, but I have not
> succeeded in transmitting a string of bytes using interrupts yet. Using a
> polling method I was able to get transmit working using the transmission
> queue.
>
>
>
> Thanks for any help you might be able to offer,
>
>
>
> Dave
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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