Instant Interrupts - Revisited

[Darrel Taylor]

For the first two, you probably haven't defined the interrupt sources or handlers.

See this page for an example.
http://darreltaylor.com/DT_INTS-18/hello.html

For the T7 warning, read this ...
http://www.picbasic.co.uk/forum/show...&postcount=348
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[ralfmayr]

Hello Darrel,
thanks, it works now, but there are coming up some more problems:

When the timer makes 1 second tick, i call a subroutine which has several
serin2 and serout2 commands to read and set data from some other modules.
It seems to come to write and read errors (time out comes in the serin2 and serout2 commands).
Also reading and writing to the 12c bus with I2CREAD and I2CWRITE to
a display doesn't work any more correct.

I enabled tmr0, tmr1, rx1 and rx2

Regards,
Ralf

[Darrel Taylor]

If you've enable RX1_INT and RX2_INT, then what is the SERIN/OUT for?

Aren't you using the USARTS?
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[ralfmayr]

Sure, i am using both uarts of the Pic, but i have one more serial port accessing
via serin/serout some more serial devices also (a eight devices bus). The status
and some controls of these eight modules accessed via serin/serout are
controlled by the two uarts to a rs232 and a ethernet board.

[Darrel Taylor]

Any type of software timed commands like SERIN/OUT, OWIN/OUT, PAUSE, PULSIN/OUT etc, will be disturbed by these types of Interrupts.

Since you have 4 different things interrupting, the software timing is getting messed up pretty bad.

If you only needed the transmit side, you could use ...

Tmr_tx-18
http://www.picbasic.co.uk/forum/show...1&postcount=28

But it sounds like you need the RX side too.

With a need for 3 USART's, You may be out of luck.

[ralfmayr]

Hi Darrel,
it works now, but is very critical in timing.
I think about using 12c, but i did not find a good i2c slave routine.
I tested one in the past, but without success.... :-(
Did you test your interrupts as an i2c slave? Can you help on this?
Regards,
Ralf

[Darrel Taylor]

> Did you test your interrupts as an i2c slave?

I haven't, but Robert Soubie did.
http://www.astrosurf.com/soubie/pic_as_an_i2c_slave.htm
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