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PIC18f27J13 UART2

 
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Besugo



Joined: 12 Mar 2011
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PIC18f27J13 UART2
PostPosted: Fri Mar 25, 2011 11:15 am     Reply with quote
HI

This is working fine:

Code:
#use rs232(baud=9600,  parity=N, bits=8, ERRORS, UART1, STREAM = COM1 )


but this i can't put to work:

Code:
#use rs232(baud=9600, xmit=PIN_C5,rcv=PIN_C4, parity=N, bits=8, ERRORS, UART2, STREAM = COM2 )


I already tried, insted of
Code:
xmit=PIN_C5,rcv=PIN_C4
,

Code:
#pin_select U2TX=PIN_C5
#pin_select U2RX=PIN_C4


Can you help me?
PCM programmer



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PostPosted: Fri Mar 25, 2011 2:45 pm     Reply with quote
Always post your compiler version if you have a problem where some
compiler feature doesn't work.
dyeatman



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PostPosted: Fri Mar 25, 2011 4:22 pm     Reply with quote
You have UART2 and pin specifications in the same statement.
Code:

#use rs232(baud=9600, xmit=PIN_C5,rcv=PIN_C4, parity=N, bits=8, ERRORS, UART2, STREAM = COM2 )

Since the chip is remappable I would take the UART2 out of the statement.
In any case you should normally not use the UART2 and the pin definitions
in the same statement. That may be causing a conflict of some kind.
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Besugo



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PostPosted: Sat Mar 26, 2011 1:54 am     Reply with quote
Wouldn't that make it a software UART instead of an hardware UART?
bkamen



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PostPosted: Sat Mar 26, 2011 8:08 am     Reply with quote
dyeatman wrote:
You have UART2 and pin specifications in the same statement.
Code:

#use rs232(baud=9600, xmit=PIN_C5,rcv=PIN_C4, parity=N, bits=8, ERRORS, UART2, STREAM = COM2 )

Since the chip is remappable I would take the UART2 out of the statement.
In any case you should normally not use the UART2 and the pin definitions
in the same statement. That may be causing a conflict of some kind.


actually, it's the other way.

He wants to keep UART2, but take out the PIN statements. And then keep the #pin_select declarations.

-ben
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Besugo



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PostPosted: Sat Mar 26, 2011 1:44 pm     Reply with quote
Yeah, I've done that but i cant remap pins to the ports i want!
bkamen



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PostPosted: Sat Mar 26, 2011 1:57 pm     Reply with quote
Besugo wrote:
Yeah, I've done that but i cant remap pins to the ports i want!


I don't think you understand...

You use #pin_select to remap the ports.
You use #use rs232 (UART2, stream=somename) to tell the compiler where output to somename goes.

I recently used this in something for the 46j11 and it looked something like this:

Code:

#pin_select U2TX=PIN_D6
#pin_select U2RX=PIN_D7
#use rs232 (UART2, STREAM=GPS, BAUD=4800, PARITY=N, BITS=8, ERRORS)


And there you go. It works like a charm.

-Ben
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Besugo



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PostPosted: Sat Mar 26, 2011 2:48 pm     Reply with quote
Thanks very much for your replies, i've done just that with no success, but now that I know you've had success, i'll look into it again.
Besugo



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PostPosted: Mon Mar 28, 2011 7:00 am     Reply with quote
What am I doing wrong??

Code:
#fuses HS,NODEBUG,NOXINST,NOPROTECT,NOWDT,NOCLOCKOUT,NOIOL1WAY,NOWPCFG,NOWPFP
   #use delay(internal=8MHz)

   #pin_select RX2=PIN_C5
   #pin_select TX2=PIN_C4

   #use rs232(baud=9600, parity=N, bits=8, ERRORS, UART1, STREAM = COM1 )
   #use rs232(baud=9600, parity=N, bits=8, UART2, ERRORS, STREAM=COM2 )


UART1 works, UART2 doesn't!

Thanks
bkamen



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PostPosted: Mon Mar 28, 2011 9:52 am     Reply with quote
I would check the assembly to make sure CCS's database has the pinselect registers set correctly.

Send your .LST output file to CCS and let them know it doesn't seem that the database for the 18F27j13 is correct.
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