Code programming error at 0000

[Demon]

After reading the HELP from the programmer, I checked PGM and it does have 0V.

I also checked the configuration and see nothing wrong:

__config _BODEN_ON & _CP_OFF & _DATA_CP_OFF & _PWRTE_ON & _WDT_OFF & _LVP_OFF & _MCLRE_ON & _HS_OSC

This excerpt of the Help file is exactly what is happening to me:

The device programmed once, but subsequent attempts return a Code Programming Error. - The configuration setting "Low-Voltage Programming" is Enabled. This leaves the device sensitive to a signal or high condition on the low-voltage programming pin (see the Microchip datasheet). To recover from this condition, you must tie the low-voltage programming pin to ground and reprogram the device. Or the device may need to be erased before reprogramming.

Oh poop...

Robert

[Demon]

I had been using a 9V wall adapter so I upped to 12V and 15V and still had the same error.

They seemed to top at 12.9V on MCLR.

Robert

[Demon]

I tried a 10K pull-up on MCLR as stated in the programmer Help file instead of a 4K7 as in the PBP manual, same error.

I added 4K7 pull-up on PGD as described on p. 111 Figure 14-18 of the 16F628A datasheet, same error. I wasn't sure where the pull-up was supposed to go for PGC (what is 'normal connections'?) I tried a 4K7 pull-up on PGC with no difference anyways.

Robert

[Demon]

I've recently downloaded the latest firmware for the MeLabs serial programmer. Now I always get a splash screen to see MeLabs.com for licensing, could this be related with my problem?

Robert

[Bruce]

The splash screen is on all the download versions of MeLabs programmer software. It shouldn't affect operation.

Can you program the device you're having problems with in the programmer zif socket?

[Demon]

The splash screen is on all the download versions of MeLabs programmer software. It shouldn't affect operation.

Good, one hting less to worry about. I'm so confused I can't even remember how I got rid of that last time I upgraded.

Can you program the device you're having problems with in the programmer zif socket?

I would have, but this is SOIC.

how about if you disconnect what is on PGD, PGC,PGM pins then, use a 100-1K resistor to gnd on PGM?

I will try straight to 0V, I think that is what I read last night in the Help, gotta check up on that.

Try to place your Programmer far of your PIC

I think you meant close, and I did, no difference.


Robert

[mister_e]

No i really meant far... not a mile away.. few inches 6-12 inches. i had some issue like that before on breadboard when a programmer was to close of the PIC... kind of interference or sort of...

[mister_e]

how about the PGM pin... should be loaded to GND. 1-10k resistor works. [b[]ok i saw you already done[/b]
how about if you disconnect what is on PGD, PGC,PGM pins then, use a 100-1K resistor to gnd on PGM?

Try to place your Programmer far of your PIC...