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Interrupt driven RS232 on 12F675?

 
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dvstate



Joined: 02 Apr 2004
Posts: 2

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Interrupt driven RS232 on 12F675?
PostPosted: Sat Apr 03, 2004 6:45 pm     Reply with quote
Is it possible to fire an interrupt when data is received via the software UART on a 12F675? It doesn't have support for INT_RDA.

If not possible, can someone provide an example of a work-around?

Thanks!
Haplo



Joined: 06 Sep 2003
Posts: 659
Location: Sydney, Australia

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PostPosted: Sat Apr 03, 2004 7:09 pm     Reply with quote
Map your receive pin on the GP2/INT pin and configure the GP2/INT external interrupt to detect falling edges (clear the INTEDG bit INTCON). This way you'll get an interrupt on the start bit of your RS232 data.
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