Can't get a 12F629 to blink a led

[Sharky]

Hi Bruce,

Right now I use the K8048 from Velleman. I like the programmer but I really don't like the software called ProgPic2.

The code that works is a HEX file that I have downloaded from the web,
just to check if the programmer and the PIC was working,
so I don't know if it uses include DEFINE OSCCAL_1K.

After I have tried to program my own code (the code shown in my previous post) It seems that the PIC dies totally. It's not possible to read it or erase it, the software just tell me that there is no device placed in the programmer.

I will try to upgrade one of my home made JDM pic-programmers so it will have an 8-pin socket and then try to program the PIC with IC-Prog software.

But I still just don't understand that the downloaded HEX file work perfectly, I can program it into the 12F629, erase the PIC and then program it again. It is first when I use my own program that the 12F629 dies.

Thank U very much for your help

Regards
Gert

[Sharky]

Now I solved the problems.

The first thing was my JDM programming device, when I use:

@ DEVICE pic12F629, INTRC_OSC_NOCLKOUT
@ DEVICE pic12F629, MCLR_OFF

It is not possible to program the PIC again with my JDM or Velleman programmer.

I solved the problem by reading this: http://feng3.cool.ne.jp/en/vddctrl.html and by using a few components and a solderiron.

And Bruce thanks for the OSCCAL learning, I have used your suggestions to get the pic up and running again.

Thanks!

Regards
Gert