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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Problem Reading 24C02 - please help		  New Topic  Reply to Topic
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Ronen 722

United Kingdom
14 Posts
Posted - 03/14/2025 :  03:40:11  Show Profile  Reply with Quote
Hi all, I have a true GQ4x4 and have removed the SOC8 chip from an ECU 074 906 021S which is 24C02 and installed it in the adapter and connected the adapter t the programer in the position farthest from the loc lever with the chip indicator dot facing the lever.

I select All generic 24C02 from the device list and then when I read it, it comes back with read complete on 0.7s and the buffer is filled with all FF.

If I do a blank check it comesback blank when it is not.

Any ideas please ?
Reply #1

Ronen 722

United Kingdom
14 Posts
Posted - 03/17/2025 :  04:40:52  Show Profile  Reply with Quote
OK a little update - I red on another forum that this has been a problem for others using the GQ 4X - they also could not get a valid read with device set to 24C02 and managed to get a read of the 24C02 chip by setting the device to 24C08.

I tried this too and then managed to get a read that looks good but has too many rows.

I exect this is some sort of bug or driver problem facing the GQ 4X4 ?

Is there a way to change the file to be compatible with 24C02 ?

Thanks
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Reply #2

anniel

2590 Posts
Posted - 03/17/2025 :  10:18:23  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

OK a little update - I red on another forum that this has been a problem for others using the GQ 4X - they also could not get a valid read with device set to 24C02 and managed to get a read of the 24C02 chip by setting the device to 24C08.

I tried this too and then managed to get a read that looks good but has too many rows.

I exect this is some sort of bug or driver problem facing the GQ 4X4 ?

Is there a way to change the file to be compatible with 24C02 ?

Thanks




Try with this:

Name="24C02 5V VCC",ID="XXXX",Class="24C02",Category="SERIAL_EPROM",MFG="ALL(Generic)",VCC="5V";
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Reply #3

Ronen 722

United Kingdom
14 Posts
Posted - 03/18/2025 :  02:08:16  Show Profile  Reply with Quote
@anniel - Thanks but how to use the information you posted - were do I put it - how do I configure it please ?

Thanks
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Reply #4

anniel

2590 Posts
Posted - 03/18/2025 :  04:01:00  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

@anniel - Thanks but how to use the information you posted - were do I put it - how do I configure it please ?

Thanks


Simply add the line to devices.txt or customdevices.txt.
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Reply #5

Ronen 722

United Kingdom
14 Posts
Posted - 03/18/2025 :  08:44:25  Show Profile  Reply with Quote
quote:
Originally posted by anniel

quote:
Originally posted by Ronen 722

@anniel - Thanks but how to use the information you posted - were do I put it - how do I configure it please ?

Thanks


Simply add the line to devices.txt or customdevices.txt.


Thanks but I checked the program files folder for the programmer and no such file exists - just .exe / .dll No sign of devices.txt

where do I find this file please ?
Edited by - Ronen 722 on 03/18/2025 08:48:05
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Reply #6

Ronen 722

United Kingdom
14 Posts
Posted - 03/19/2025 :  02:09:18  Show Profile  Reply with Quote
Many thanks,

This worked. Looks like the 24C02 is a 5V device,
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Reply #7

anniel

2590 Posts
Posted - 03/19/2025 :  05:28:09  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

quote:
Originally posted by anniel

quote:
Originally posted by Ronen 722

@anniel - Thanks but how to use the information you posted - were do I put it - how do I configure it please ?

Thanks


Simply add the line to devices.txt or customdevices.txt.


In the menu > Device > User Folder.

Thanks but I checked the program files folder for the programmer and no such file exists - just .exe / .dll No sign of devices.txt

where do I find this file please ?
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Reply #8

anniel

2590 Posts
Posted - 03/19/2025 :  05:28:53  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

Many thanks,

This worked. Looks like the 24C02 is a 5V device,


Excellent.
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Reply #9

Ronen 722

United Kingdom
14 Posts
Posted - 03/19/2025 :  08:16:31  Show Profile  Reply with Quote
If I want to get another chip of this type in case I ruin the one from the ECU would I order a straight 24C02 as I cannot find any 5V variants ?
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Reply #10

anniel

2590 Posts
Posted - 03/20/2025 :  08:13:00  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

If I want to get another chip of this type in case I ruin the one from the ECU would I order a straight 24C02 as I cannot find any 5V variants ?


https://www.digikey.com/en/products/detail/stmicroelectronics/M24C02-WMN6TP/1663568
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Reply #11

Ronen 722

United Kingdom
14 Posts
Posted - 03/21/2025 :  06:47:40  Show Profile  Reply with Quote
Thanks, got the same from CPC Farnell.
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Reply #12

anniel

2590 Posts
Posted - 03/22/2025 :  04:52:49  Show Profile  Reply with Quote
quote:
Originally posted by Ronen 722

Thanks, got the same from CPC Farnell.


Excellent.
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