Pic16f870

[skimask]

Adcon0=0
Adcon1=7
Trisa = %000011
Trisb = %00110000
Trisc = %00000000

This is what I have been using since the beginning and it still doesn't work. I have it on my EasyPIC 5 and when I load a simple code to blink LED's when I "press" one of the 4 inputs buttons, it doesn't blink any of the LEDs..... Very strange, Very confusing, and this chip is going to die via a hammer very soon.

What happens if you load code just to blink LEDs without any button presses at all...just set all of the pins to outputs and blink them all...

[plyrathrt]

lol.... Not a damn thing. Not 1 pin goes high.

I have a few of these chips ordered at different times so the likely hood of all of them being bad is not very likely.

Edited:
I took out my "DEFINE OSC 8" and no Porta.6 goes high but is not blinking. So I guess it's still "nothing happens"..................

[skimask]

lol.... Not a damn thing. Not 1 pin goes high.
I have a few of these chips ordered at different times so the likely hood of all of them being bad is not very likely.
Edited:
I took out my "DEFINE OSC 8" and no Porta.6 goes high but is not blinking. So I guess it's still "nothing happens"..................

Kinda rules out bad port settings eh?


What are you using for an oscillator? A crystal? A resonator? External clock input?

Got a pull up on MCLR?

[plyrathrt]

Internal, packaged in to the chip.

You only need to pull up the MCLR for Programming... Also keep in mind, this is on a full development board (Mikroelectronica EasyPIC 5) and not just placed in a breadboard with ICSP.

[skimask]

Internal, packaged in to the chip.
You only need to pull up the MCLR for Programming... Also keep in mind, this is on a full development board (Mikroelectronica EasyPIC 5) and not just placed in a breadboard with ICSP.

Ok, here's the next question....and it's going to be a tough one, I mean hard...You may have to study quite awhile to answer this one...

Which internal clock would that be on the PIC16F870?
(Ref: Pic16F870 datasheet, DS30569B-page 89)

[plyrathrt]

I don't see anything about a software selectable internal oscillator. I am guessing that is why you said "you may have to study very hard". Is that correct?

Even with that it should still turn a pin high that I designate for a button press right?

[skimask]

I don't see anything about a software selectable internal oscillator. I am guessing that is why you said "you may have to study very hard". Is that correct?

Even with that it should still turn a pin high that I designate for a button press right?

Not without some sort of oscillator driving the chip you won't...The PIC16F870 doesn't have an internal oscillator...Therefore, your chip won't run anything.

Did you see the 4 oscillator/clock options you have with the PIC16F870?