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RS232 interrupt not working (Solved)
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harlequin2



Joined: 11 Jun 2011
Posts: 21

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PostPosted: Sun Jun 12, 2011 6:06 pm     Reply with quote
Quote:

I did not put the 'xmit= PIN_A4' and 'rcv=PIN_A5' statements in the code in my post !
You should NOT do it. You should use 'UART1' ONLY ! (After this I give up).


You are quite right, I didn't notice you had left that bit out. I have removed it and it works.
Thanks very much, I'd never have solved it without your help.
Its a pity the compiler documentation isn't a bit better on this
Douglas Kennedy



Joined: 07 Sep 2003
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PostPosted: Sun Jun 12, 2011 6:40 pm     Reply with quote
The lesson to be taken from this is if the there is a valid interface to the Uart hardware pins and the RDA interrupt code is set up correctly and the RDA doesn't fire then a software UART may have been set up instead. The compiler sets up for a software uart by default if the use rs232 statement syntax hasn't correctly called for hardware to be used. Use of a software uart should be discoverable by looking at the lst file.
harlequin2



Joined: 11 Jun 2011
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PostPosted: Sun Jun 12, 2011 7:21 pm     Reply with quote
Douglas Kennedy wrote:
The lesson to be taken from this is if the there is a valid interface to the Uart hardware pins and the RDA interrupt code is set up correctly and the RDA doesn't fire then a software UART may have been set up instead. The compiler sets up for a software uart by default if the use rs232 statement syntax hasn't correctly called for hardware to be used. Use of a software uart should be discoverable by looking at the lst file.


The compiler is just a bit too helpful! I've never seen one before that would create a s/w uart for you just by a "use rs232" statement.
I've been using Atmel stuff for years and this is the first time I've done anything with a PIC, same for the CCS compiler, so its a relief to get it to do what I want.
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