MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 Adding DQ2817A chip
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Willie

USA
4 Posts

Posted - 01/08/2016 :  10:17:22  Show Profile  Reply with Quote
Hello, Forum! This is my first post. :)

I have this system:
H/W Re: GQ-3X Re-1.51(SW Re. 6.38)
USB Driver Re.2.0
Software Re. 6.38

It works GREAT and I am VERY happy with it!! :) Now, to my issue...

I've done a lot of searching & reading here in the Forum, looking for info on setting up the proper string in the DEVICES.TXT file to make this DQ2817A chip work, and I'm coming up short.

For one thing, how does one set the CLASS= parameter? Is there a place where that is defined so it can be researched? (Is this how the programmer "knows" which pins are which in the socket?)

Since this seemed to be the closest, I tried this, but it didn't work:
Name="5517B",ID="XXXX",Class="AT28C16",Category="FLASH",MFG="SEEQ",CodeSize="2048",VPP="5V",VCC="5V",WVPP="5V",Speed="5";

When I tried Class="AT28C17" the programmer software crashed, so I had to go back into the text file and reset it to "AT28C16".

Any advice and/or help is sincerely appreciated. :)

Thanks!

Willie...
Reply #1

ZLM

2923 Posts

Posted - 01/08/2016 :  14:33:51  Show Profile  Reply with Quote
Try this:

Name="5517B",ID="XXXX",Class="28C64",Category="FLASH",MFG="SEEQ",CodeSize="2048";
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Reply #2

Willie

USA
4 Posts

Posted - 01/11/2016 :  08:46:53  Show Profile  Reply with Quote
That allowed me to be able to READ this chip, so that is a good start! :) THANK YOU!

I was able to save the original code that was in it, then successfully ERASED the chip.

Unfortunately, I couldn't write to it. I tried adding the voltage commands and setting the speed to slow, but it still didn't write.

The voltage commands I added are:
VPP="5V",VCC="5V",WVPP="5V",Speed="5"

I must be missing something.

Willie...
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Reply #3

ZLM

2923 Posts

Posted - 01/12/2016 :  14:01:22  Show Profile  Reply with Quote
What is your exact error message when write fail?

Try slower speed?
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Reply #4

Willie

USA
4 Posts

Posted - 01/13/2016 :  07:31:16  Show Profile  Reply with Quote
I've tried the slowest speed, and "double write" but it fails each time. I just test it by trying to write a byte of $00 to a given address, but it won't write. It reads back $FF, indicating that nothing was written.

In this test, I tried to write $00 to address $00A0. This is the error message: "Write failed, Address=0x0000A0, Buffer=0x00 Device=0xFF"

It is POSSIBLE that the chip, itself, is bad... but it WAS holding valid data, and I WAS able to erase it. I just can't write... so that's why I wanted to make SURE I had all of the parameters set correctly in the DEVICES.TXT file.

When I click the "i" button in the device window, one of the items seems odd. It says, "DATA SIZE:0 BYTES"

Re-sending screen capture. (1/15/2016)


THANK YOU for your assistance. :)

Image Insert:

36800 bytes

Willie...

Edited by - Willie on 01/15/2016 07:23:50
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Reply #5

ZLM

2923 Posts

Posted - 01/14/2016 :  20:21:16  Show Profile  Reply with Quote
upload picture should be fine now.
Please try again.

Do you have second chip to try?
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Reply #6

Willie

USA
4 Posts

Posted - 01/15/2016 :  07:25:46  Show Profile  Reply with Quote
Thanks for fixing the picture system! I just uploaded it to my previous reply.

Unfortunately, the only other chip I have, is the one that is in the currently active/in-service unit. I am VERY reluctant to tinker with it, because it is in active use.

I will have to see if I can simply source a new chip, and go from there.

Willie...
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