Configuration error

[mackrackit]

OK, I tried a 3rd 12F675 and altho I made sure the configuration was xt_osc and not code protected, the program failed with configuration error and when I read the memory, it comes up lp osc and code protected. I don't know what to do except uninstall and re-install the program.

What programmer are you using?

The PICKit2 doesn't have an erase button

Mine does

[Meriachee]

Russ,

Take it to the step where you actually program the chip, press "view" and open the "configuration" window, and post what the settings are, here, would you? I'm interested in what it's telling you.....
By default, they should match -exactly- the listing in the 12f675.inc file in c:\pbp (or wherever it lives)
If you've changed them in the config window and saved it, then the saved values will be the default.

By way of example, you should have an option for setting the osc. The default may be XT, but you can change it to INTOSC and save the settings. Quite handy (I can see Dave cringing right now - sorry) handy if you never plan to use any other compiler...... not so handy if the code needs to be portable.

I am having quite a time with some code that makes Thomas the Tank Engine look complex. Oddly enough it's a 12f675. AND, the routines are simple and have been used a few times, not precisely the same, but the methodology. Now it won't run. I loaded a working file into the same chip on the same development board and it won't run either. The working file was built last week, and the MeProg software upgraded shortly thereafter.

Gary

[Russ Kincaid]

Any time I try to program a 12F675, the default configuration is LP osc and code protected.


If I change the configuration to EXTOSC and NOT PROTECTED and try to program, I get a configuration error.


Now, when I read the part, the configuration changes to LP osc and code protected.

I am using the Melabs programmer. I can make a jpg image of the configuration window but don't know how to post it.

[mackrackit]

Below the message box when you reply there is a "manage attachment" button.

[Darrel Taylor]

Sounds like a programming cable problem.

If you have nothing connected to the programmer, and try to read back a 12F675, it'll show these configs.

Oscillator      LP
Watchdog timer  Disabled
Powerup timer   Enabled
MCLR Pin        Input Pin
Brown out       Disabled
Code protect    Protected
Data EEPROM     Protected

And it'll show all 0000's in the code window.

Check the connections again, especially at the 10-pin connector on the programmer.
Make sure the connector is alligned correctly.
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[Russ Kincaid]

Thanks, Darryl but the connector has not been messed with and it worked OK before. The read does read the hex file that was loaded.

[Darrel Taylor]

OK, if it reads the memory then it wasn't the cable.

I am using melabs programmer version 4.01 ...

You might try the latest version of meProg which is up to version 4.31 now.

The beta can be downloaded here ...
http://www.melabs.com/support/progsoft.htm

hth,