12f675_fuse_about_to_blow!

[rmteo]

Dave, use <code> tags and format your code - makes it easier to read.

ANSEL  = %00000000 'disable analog select so ports work as digital i/o
CMCON0 = %00000111 'Disable analog comparators
TRISIO = %11001111 'Set GPIO.4&5 to input
GPIO   = %00000000 ' set all outputs low

i VAR BYTE

START
Main:
pause 500          'pause 500 mili-secs
For i = 1 to 3     ' loop count variable (value i) also number of times to loop.
  LOOKUP i, [ 223, 223, 223] ,GPIO      '223 = %11011111 D0 switches on (GPIO.4)
  Pause 500        'pause 500 mili-secs
  LOW GPIO.4       ' DO switches off
Next i             ' loop again. ONE is added to count i and prog jumps to FOR

[HenrikOlsson]

Hi Dave,
Two things.... First as you figured out and as Alain also pointed out you will need an END after the loop or the PIC will wonder off to never never land eventually starting over (I think). Second, you need another PAUSE in there or you will not see the LED blink. It will get turned on then 500ms later it will get turned off and then on again almost instantly as the loop goes back to the beginning. I guess that's what you were trying with the PAUSE right after Main but remeber that the loop starts over at the FOR statement.

Main:
pause 500          'pause 500 mili-secs
For i = 1 to 3     ' loop count variable (value i) also number of times to loop.
  LOOKUP i, [ 223, 223, 223] ,GPIO      '223 = %11011111 D0 switches on (GPIO.4)
  Pause 500        'pause 500 mili-secs
  LOW GPIO.4       ' DO switches off
  Pause 500
Next i
END

[LEDave]

Henrik you are a star.....!

So I was pretty close then? I guess we wouldn't want to be flying in an aeroplane with any PIC'S in it I'd programmed just yet though...

Right, I'm off for some for-next-loop practice.

Cheers: Dave

[LEDave]

Testing 1.2.3.

So that's a code tag then, I really didn't know that...doh.

[LEDave]

Evening everyone.

I've been doing a lot of reading of late some beneficial some confusing.

I've decided to try and make a 12F683 turn an LED on when a button is momentarily pressed, then expand this further. I can see lots of possibilities in being able to make outputs do different things on receipt of an input/s.

Is something like this on the right lines?

IF GPIO.x = HIGH 'Button is pressed.

THEN OUTPUT GPIO.x HIGH 'Turns LED on

I've put the driving a seven segment display using a 16F684 and part of two ports to on hold just for the minute.

David

[mackrackit]

Almost...
Take a look at this. From the manual...
http://www.melabs.com/resources/pbpmanual/5_32-5_35.htm

[Archangel]

Evening everyone.

I've been doing a lot of reading of late some beneficial some confusing.

I've decided to try and make a 12F683 turn an LED on when a button is momentarily pressed, then expand this further. I can see lots of possibilities in being able to make outputs do different things on receipt of an input/s.

Is something like this on the right lines?

IF GPIO.x = HIGH 'Button is pressed.

THEN OUTPUT GPIO.x HIGH 'Turns LED on

I've put the driving a seven segment display using a 16F684 and part of two ports to on hold just for the minute.

David

Hi David,
I think I smell what you are cooking, you want to send power to a port and then have it stay powered after you release the switch. I Used to install gun lock timers that were wired that way.
Try This UNTESTED CODE

GPIO  = %00000000 ' set all outputs as low
TrisIo = %00000001 'make all outputs except GPIO.0
main:
If GPIO.0 then unlock
goto main
unlock:
Trisio.0 = 0 'changes to output
GPIO.0 = 1 'sets port latch to high logic
pause 30000 ' wait 30seconds
GPIO.0 = 0 :TRISIO.0 = 1 ' Turn it off
goto main

end

Keep in mind there is no setup code appropriate to your PIC

[LEDave]

Hi Joe,everyone. Sorry for the slow reply, it's been one of those days today.
Before I forget I loved the line: "I think I smell what you are cooking" It's had me smiling all day.

Joe, the program you wrote. I was happy with all of it except line four.I see you've made GPIO.0 an input
but the 'THEN' label hasn't been given a HIGH or LOW statement for the pin

If GPIO.0 then unlock

To my mind (please be gentle with me I'm really green at this) it should be something like:

IF GPIO.0 = HIGH THEN  UNLOCK ' GPIO.O goes HIGH (button pressed) jump to
label UNLOCK.


ELSE  GOTO MAIN ' button not pressed do the loop again 
(not sure if I needed the GOTO here).

Or maybe:

IF GPIO.O = LOW THEN MAIN ' button not pressed,  do the loop again

Am I on the right lines here?

* Silly but important question here*: I'm confusing myself, can an INPUT be either HIGH or LOW?
I know an OUTPUT can be.

So your program is maybe a timed latching relay circuit or locking solenoid?

As for my program, I was thinking more along the lines that if GPIO.X goes high (a button is pressed +5v on that input pin) that would make an output on GPIO.Y go high. In other words the pressing of a button makes the program jump to some specified section of code making an output.

Then moving this idea on, if the button was pressed twice (within a certain time period say) you could 'jump' to another section of code and make a different output..

I hope you're all having a pleasant evening,

David