Port 'a' problems

[Robotica1]

That's the only assembly routine I have in the code. It's all attached but if you need I'll include in the body of a post. Yeah Dave (Don't know what was happening there with attachments...thanks again). Anyway I tried CMCON=7 and CMCON=%00000111. When the code hits "high l9:high l11ause 3:"..l9 flashes (almost imperceptibly) then l11 goes high. When it gets to the next section ('High l10:low l11:high l12) then l10 goes high and l12 does nothing!!

[mister_e]

what happen if you remove all those colon in your code???

Pause 3, seems really fast so far... 300 could be more interesting.

Not sure of those multiple...

RETURN
END

L12 refer to RA.4, and it's an open drain type. You can't drive a LED as you wish. At least, you could drive it if it's connected between Vdd, and the PIC, not between GND and PIC

[Robotica1]

I have a pause of 3 because I am using an external clock signal from a 555 astable with an adjustable (low) frequency ( so that the flash rate is adjustable). It is definately a visible speed. The colons are there because I had each sequence on it's own line earlier. I split the lines and left the colon's because I read something last night in an old post by ski-mask discussing something along these lines. I just recoded without the colons as I'm typing this and nothing changed at all.

[mackrackit]

What Mister_E said about RA.4 might be it -- or -- Looking at the two attachments it might be a combination of code and hardware. In the code I do not see a complimentary pin all of the time.

I made this up for some hide I work with, it explains what I am getting at.
http://mackrackit.com/mac/www/dave/LED/LEDs.html

[mister_e]

I don't understand why it shouldn't work unless you have an hardware problem OR a bad configuration fuse setting.....

what happen with that one???

        @       __CONFIG  _INTRC_OSC_NOCLKOUT & _MCLRE_OFF  &  _LVP_OFF & _WDT_OFF & _PWRTE_ON  & _BODEN_ON  
        '
        '       or use the one bellow if you use PM assembler
        '   @       device  pic16F628A, intrc_osc, wdt_on, mclr_on, lvp_off, protect_off 
        PORTB = 0
        PORTA = 0
        TRISB = 0
        TRISA = 0
        CMCON = 7
        
START:
        PORTA = 255
        PORTB = 255
        PAUSE   200
        PORTA = 0
        PORTB = 0        
        PAUSE   200
        GOTO    START

but yeah... pure assumption, no schematic available, and i need more cofee