PIC programmer problem

[Emil Johnsen]

Hi,

I'm trying to program a PIC16F826 with a JDM programmer ("Multi chip
programmer" from http://www.talkingelectronics.com) and IC-Prog 1.05C.

I always get the error message "Verify failed at address 0000h!".

Anyone know what the problem can be?

 

[Anthony Fremont]

Hi,

I'm trying to program a PIC16F826 with a JDM programmer ("Multi chip
programmer" from http://www.talkingelectronics.com) and IC-Prog 1.05C.

You don't happen to mean 16F628 do you?

I always get the error message "Verify failed at address 0000h!".
Ok

Anyone know what the problem can be?

Potentially lots of things at this point. Did you erase the chip first?
If so, did you try doing a blank check after the erase? Did you set the
proper chip type in the programming software? How about the CONFIG
bits? Does your computer's serial port output a high enough voltage to
put the chip into programming mode? If it's a laptop, probably not.

 

[Emil Johnsen]

You don't happen to mean 16F628 do you?

Potentially lots of things at this point. Did you erase the chip first?
If so, did you try doing a blank check after the erase? Did you set the
proper chip type in the programming software? How about the CONFIG
bits? Does your computer's serial port output a high enough voltage to
put the chip into programming mode? If it's a laptop, probably not.

I ment to write PIC16F628. This is what I have selected in IC-prog as well.

The chip is new and blank. I have also erased it and done a blank check to
be sure. (Tried a second new chip as well.)

Oscillator: Tried every option while keeping the settings below.
CP: off
WDT, PWRT,BODEN,LVP,CPD: off
MCLR: on

I'm not sure about the voltage. I have measured the MCLR pin while
programming and got 11.8-12.2 volts. I'm not confindent this is accurate
because my voltmeter is slow to respond to changing voltages. I'm not using
a laptop.

 

[Anthony Fremont]

The chip is new and blank. I have also erased it and done a blank check to
be sure. (Tried a second new chip as well.)

I assume it passed the blank check then.

Oscillator: Tried every option while keeping the settings below.
CP: off
WDT, PWRT,BODEN,LVP,CPD: off

You should probably turn ON the PWRTE, but it's not the problem.

MCLR: on

I'm not sure about the voltage. I have measured the MCLR pin while
programming and got 11.8-12.2 volts. I'm not confindent this is accurate
because my voltmeter is slow to respond to changing voltages. I'm not using
a laptop.

It's supposed to be 13V, so you might not be getting enough voltage to
the PIC to put it into programming mode. Apparently this is a common
problem with JDM type programmers. Can you try it using a different
computer? Will the software let you examine the contents of the PIC
after you do an erase/blankchk/program cycle? If so see if it looks
like anything at all was written to the PIC.

 

[Emil Johnsen]

It's supposed to be 13V, so you might not be getting enough voltage to

the PIC to put it into programming mode. Apparently this is a common
problem with JDM type programmers. Can you try it using a different
computer? Will the software let you examine the contents of the PIC
after you do an erase/blankchk/program cycle? If so see if it looks
like anything at all was written to the PIC.

I got a card IO card with 2 com ports. Using these ports it works fine, so
it was my com ports that caused the problem.

Because of some driver problems (the new ports doesn't work with
totalio.sys) it still doesn't work in XP, but from Win98 I programmed the
chip with no error messages.

Thank you for your help.