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 Topic  |
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LMQT
France
23 Posts |
 Posted - 10/22/2006 : 08:59:55
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Hi,
I can't write on my Atmel AT28C256 
Dipswitches are correctly setting, chip is well selected in the list, but the board can't writing on the chip.
But strangely, it can erase my chips 
My AT28c256 work well on my old Willem Enhanced, so I'm sure the chips are OK.
Appart from my AT28C256, the board GQ-2X works well with many other EPROMs, so the board is OK too.
Anyone has an idea ? |
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| Reply #1
ZLM
2945 Posts |
Posted - 10/22/2006 : 10:50:15
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Did you change the speed and try?
Does it read the chip correctly?
What is the exact error when write? |
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| Reply #2
LMQT
France
23 Posts |
Posted - 10/22/2006 : 22:29:36
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ZLM : yes I try to change the speed also, but with no effect at all.
EZoSat : effectively "write failed at address : 0x00 ....."
Will this chip be supported in the next releases ? |
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| Reply #3
mcumall
78 Posts |
Posted - 10/23/2006 : 11:59:27
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We may already know what's exactly happened here.
The error message "Device write failed at address: 0x000000, Buffer=0x65 Device=0x65" showed the device first byte is already write correctly. But it failed on verify process.
The current write algorithm used byte mode to write. The write algorithm has build in verification step after each byte write. If the write mode and verification mode switching speed is faster than chip's speed, the verification will fail. The speed seems not controlled the switching mode here.
EZoSat, would you please confirm that the first byte been write correctly? If this is the case, then it can be easily fixed.
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| Reply #4
mcumall
78 Posts |
Posted - 10/23/2006 : 15:28:24
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| Well, this looks like something wrong with the write process. We need look the code again. |
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| Reply #5
ZLM
2945 Posts |
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| Reply #6
dkedrowitsch
6 Posts |
Posted - 10/24/2006 : 06:13:23
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Do you have any type of changelog for this Beta so I can see what has been changed/fixed since 1.06.
On first glance I do notice we can resize the window now, but the default size is still maybe 10x10 pixels too small.
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Edited by - dkedrowitsch on 10/24/2006 06:16:23 |
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| Reply #7
ZLM
2945 Posts |
Posted - 10/24/2006 : 10:38:43
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The full change log will be released once finished the beta test.
Basically fixed some bugs and added new devices to the supported list.
Such as:
-fixed Ctrl+U crash
-fixed PIC CFG read crash
-modified 28C256 flash algorithm
-... and more
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| Reply #8
LMQT
France
23 Posts |
Posted - 10/25/2006 : 09:13:35
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v1.07 don't work better :(
- It is more more long : 3 seconds by percent.
- There is no more error just at the begining, but there is one somewhere further.
- No more data was written than the 1.06 (even at addresses before the error of course)
Any other idea mcumall ? :))
Thanks for this try anyway ;) |
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| Reply #9
LMQT
France
23 Posts |
Posted - 10/25/2006 : 09:20:41
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quote:
Originally posted by LMQT
v1.07 don't work better :(
- It is more more long : 3 seconds by percent.
- There is no more error just at the begining, but there is one somewhere further.
- No more data was written than the 1.06 (even at addresses before the error of course)
Any other idea mcumall ? :))
Thanks for this try anyway ;)
Edit : after two pass of erasing for the AT28c256, the write operation was successfull 
A second one also !!
So, there is juste the problem of the extreme slowness to solve now (if it is possible) 
Thanks again. |
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| Reply #10
LMQT
France
23 Posts |
Posted - 11/01/2006 : 03:18:30
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Hi,
Some news for the slowness ?  |
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| Reply #11
ZLM
2945 Posts |
Posted - 11/03/2006 : 04:34:40
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| Try Re.1.07. |
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| Reply #12
LMQT
France
23 Posts |
Posted - 11/03/2006 : 13:58:36
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Failed immediatly at speed "+2"
Failed in the first 100 bits at speed "+1"
Sometimes failed at speed "0" (5 minutes by writing)
=> it's worth than the beta |
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| Reply #13
ZLM
2945 Posts |
Posted - 11/04/2006 : 05:30:53
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| Can you download again? |
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| Reply #14
Danny11
USA
1 Posts |
Posted - 11/05/2006 : 13:02:36
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1.07A worked for 28c256 previous ver. would fail.
Using XP SP1
Ds |
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| Reply #15
ZLM
2945 Posts |
Posted - 11/05/2006 : 16:45:54
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There is a DIP setting error been fixed in 1.07B. (the DIP 10 should be OFF).
The 1.07B is ready for downloading. |
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| Reply #16
LMQT
France
23 Posts |
Posted - 11/07/2006 : 10:31:34
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v1.07b works perfectly, you're a chief 
Thanks a lot for your reactivity  |
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Topic |
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Error writing Atmel AT28C256
