LOW PORTA cause serin2 not working.

**mackrackit** · - 23rd August 2009, 21:04

Try replacing PORTA with GPIO???
That chip does not have an A.

**mikewen** · - 23rd August 2009, 21:38

Originally Posted by mackrackit

Try replacing PORTA with GPIO???
That chip does not have an A.

Tried that. Actually, I used GPIO.4 in the first place.

I tried GPIO.0 too, but for GPIO.0, always stay low,
not able to set high.

**Darrel Taylor** · - 23rd August 2009, 21:48

I think this might help ...

AllDigital.pbp
http://www.picbasic.co.uk/forum/showthread.php?t=11100

Or you could just ...

Code:

CMCON0 = 7

But AllDigital would have told you that too.

hth,

**mikewen** · - 23rd August 2009, 21:59

Tried CMCON0 = 7 , still the same.

Thank you for your help, it would useful if I decide to use other chips.

Originally Posted by Darrel Taylor

I think this might help ...

AllDigital.pbp
http://www.picbasic.co.uk/forum/showthread.php?t=11100

Or you could just ...

Code:

CMCON0 = 7

But AllDigital would have told you that too.

hth,

**Darrel Taylor** · - 23rd August 2009, 22:21

Woops,

Also change ...

TRISA = %11111110

to

TRISA = %11111100

RS232_out is on PORTA.1

No that won't matter, never mind. Duh!

**mackrackit** · - 23rd August 2009, 23:43

What is "PORTA.4" connected to?

**Archangel** · - 28th August 2009, 04:18

No I have not looked at the data sheet . . .

Code:

TRISA = %11111110
PORTA = GPIO

I see you aliased GPIO as portA, shouldn't you also alias the TRISIO as TRISA, for this to work ?

Code:

TRISIO = TRISA
GPIO  =  PortA
PortA = %00101100
TrisA = %11111100

Thread: LOW PORTA cause serin2 not working.