On Fri, 26 May 2006 22:03:01 -0700, Brooke Clarke wrote:

>Hi:
>
>I'm trying to get Myke's 2-wire LCD interface working with a 16F88 and 
>4x20 LCD.
>One of the debugging steps is to set  _CONFIG1 to INTRC_CLKOUT both in 
>the code and in MPLAB v7.30 configure/configuration bits.
>But when I put a scope on pin # 15 (RA6) there's no clock out, but there 
>are LEDs blinking etc that make be think the chip is doing something.
>--snip--
>    __CONFIG    _CONFIG1, _CPD_OFF & _CP_OFF & _DEBUG_OFF & _INTRC_IO & 
>_LVP_OFF & _MCLR_OFF & _PWRTE_OFF & _WDT_OFF & _WRT_PROTECT_OFF & 
>_INTRC_CLKOUT
>
>--snip--
>  org    0
>  nop
>  nop
>
>; Now set 4 MHz clock
>    bsf    OSCCON, IRCF2
>    bsf    OSCCON, IRCF1
>    bcf    OSCCON, IRCF0
>    nop    ; allow some time for oscillator to settle
>    nop
>--snip--
>Any thoughts as the why there's no clock out?
>

The configuration term '_INTRC_IO' sets the pin that would normally
be the clock out pin as an I/O pin. To see the clock on the pin, you'd
need to use _INTRC_CLKOUT instead.


Regards, Bob

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist