Cant get my PIC running

[mackrackit]

Welcome,

My assembly is really bad, but this might be the problem.

Loop NOP
goto Loop

I think it is stuck in a NOP loop.

Try the PB demo
http://www.melabs.com/pbpdemo.htm

[Viberer]

Thanks for reply, i tried it but it didnt work In some samples i have seen this kind of infinite loop being used, i dont know why it is there.

[Bruce]

With LVP enabled you need to ground RB3 for normal operation. If this pin is left floating or
high it thinks the PIC is in programming mode, and will not execute your code.

Read section 12.17 in your data sheet and look at note 4 in the grey area.

[Viberer]

With LVP enabled you need to ground RB3 for normal operation. If this pin is left floating or
high it thinks the PIC is in programming mode, and will not execute your code.

Read section 12.17 in your data sheet and look at note 4 in the grey area.

Oh yes, i remember reading that. I tried grounding it then and i forgot it when it didnt help. Now it is grounded again and will be that way but i got still no life from it Thanks for notification

Im really starting to lose my mind with this chip

[Bruce]

It can definitely be frustrating, but hang-in there...;O}

Which device programmer are you using?

Have you programmed another PIC succesfully with this programmer?

Have you checked every single connection with a volt-meter?

Have you tried another oscillator?

A LOT of factors are involved. Even with a simple program like yours just
making a pin high.

[Viberer]

It can definitely be frustrating, but hang-in there...;O}

Thanks

The programmer is designed by engineers of a finnish IT magazine, which they released to the magazine and to the web. So it is not any common model. The program that uses the programmer is too written by them. http://www.mbnet.fi/nettijatkot/2002/03/rakentelu/

first link under "Kopioitavat tiedostot" leads to circuit board model with EAGLE. The third is for Visual basic source code.

In the program you can define only if watchdog is on, choose to verify written data and repair errors and choice of oscillator.

This is first chip im trying to program and i have checked connections with multimeter.
Unfortunately i dont have another oscillator.. and theres not oscilloscope to test it. One thing pops to my mind: the wires to oscillator are about 6cm long, could it be bad? As a poor student i have kind of home made breadboard and it is not too easy to solder close to the PIC.

[Archangel]

Hi Viberer,
I do not use LVP, I have a six dollar JDM clone from Bulgaria I bought on eBay, and I use ICPROG a freeware programming software. Recently I began programming 16F88 for the first time, and my programmer balked and complained and refused to verify the chips, of coarse I thought, darned sample chips, darned cheap programmer . . . What I found works is to power the PIC from a 5 volt supply while programming and viola' it programs fine.
HTH
JS

[Bruce]

Try the attached HEX file. If it works your programmer is probably OK. If not, check everything else.

Note this will blink an LED on RB0.