SERIN and interrupts

[rosswakelin]

Hi all,

The Picaxe manual says that certain commands like pause etc. are able to be interrupted using the "setint" command. Does that apply to serin?
What I am trying to achieve is to have a system that either responds to a single button being pushed, and to commands received over the serial port, at the same time, so I can't just go into a SERIN wait state. I would prefer not to have an 08 dedicated to the serial reading if I can help it.

Thanks

 

[moxhamj]

There is no interrupt for serin, and many of us have less hair as a result!

After much pondering over several years, I've gone for the dedicated 08. It is only another $4.

 

[manuka]

Jeremy Leachhas offered this approach in the past, apparently as part of a Weather Station setup

Instead of running the Serin command, check the input for 'line high' status in a loop and have the loop timeout.

If the sending device sets the line low by default and high just before (e.g 1 ms) it sends this can work very effectively.

Because the line is high before the send you need to use the T option in the Serout/Serin commands.

Like Dr_A I normally just use a 2nd 08, & shamefully confess to not having yet tried Jeremy's approach- has anyone else?

 

[hippy]

I've used Jeremy's approach and variations of it. It only works if in control of sending the data ( from another PICAXE/micro or PC ).

For other cases, an additional PICAXE or use an X1 and high-speed serial.

 

[rosswakelin]

Bah humbug

Oh well, it was worth a try. The serial is coming in from a wireless link so Jeremy's solution won't work. Time to break out an 08 by the sounds of it.

Thanks for the help