28Cxxx EEPROM Programmer

[RAAV027]

Thank you for the reply.
I am using a breadboard. I am using the AT28c64b and an arduino mega (I have an uno R3 too). I used your schematics to connect all.
I am using your arduino sketch $Revision: 1.2 $.
my operating system is windows 8 x64
I am using the simple jburn 2.

the error messages are:
now selected: COM4
Error : Unknown Application
Simple JBurn - Revision : $Revision: 1.5 $, $Date: 2013/07/19 05:44:46 $
Error: Not connected to any Programmer!
And in the command prompt
Error 0x5 at ..\rxtx\src\termios.c<892>: access is denied

I can set the arduino speed (115200) but, How can I set the Java-Tool speed?

thank you for the help.

Rodrigo

[mkl0815]

Your problem seems to be, that the RXTX library cannot access your comport. This has nothing todo with the MEEPROMMER software, it is a general problem with the RXTX library. I have no windows system to test, I'm using only MacOS and Linux machines. Maybe you need to be in a special group to have access to a COM port.

Mario.

[Martin_H]

I had the same problem on Windows, and I think this is a general problem with that library. So I forked Mario's code and wrote a C# client. It's on Github here:

https://github.com/Martin-H1/MEEPROMMER

It compiles using the free version of VisualStudio.

[mkl0815]

Yesterday I stumbled over a different library that can be bundled with the final jar file and contains all low-level parts for windows, mac os and linux (even ARM). So I'll try to replace the RXTX lib with the new one. But it will take some days.

Mario.

[juice2839]

Martin_H wrote:

I had the same problem on Windows, and I think this is a general problem with that library. So I forked Mario's code and wrote a C# client. It's on Github here:

https://github.com/Martin-H1/MEEPROMMER

It compiles using the free version of VisualStudio.

I too have built this, but when I run the Java software it does not open. Do you have a compiled version of your software?
Thanks for any help.

[xjmaas]

I am sorry if I am bumping an old thread, but I am trying to get my home-built MEEPROMMER working. Instead of an Arduino Uno, I am using a (Sparkfun) Arduino Pro Micro (5V/16MHz). I rewrote part of the Arduino firmware and seems to be working partly.

If I write some bytes from the Arduino monitor window, it is written to my EEPROM (AT28C64E). Up to $200 bytes works, but when I try to write $400 bytes the '%' prompt never returns and the Arduino seems to hang.

(I am using the firmware based on the source found here

[BigEd]

Can you write the 400 as two sets of 200?
(Edit: not as a workaround so much as an experiment)

[xjmaas]

BigEd wrote:

Can you write the 400 as two sets of 200?
(Edit: not as a workaround so much as an experiment)

Sorry, I stand corrected: I can write up to $180 bytes, if I send more, the Arduino 'hangs'. I tested this using the Arduino Serial Monitor, but also with other Serial terminal applications...



The meeprommer.py program I use, the Python 3 version, isn't receiving the '%' prompt, or so it seems....

EDIT:
I just tested it with meeprommer.py, I changed the python script to send $100 bytes a time. The first $100 bytes seem to be written correctly, but the sequence hangs during the second batch of $100 bytes.

[xjmaas]

I got it resolved:
- Using an Arduino Pro micro, with ATmega32u4, it seems the serial line is cut off/buffer full/something else
- Using an Arduino Uno, with ATmega328p, no problem at all.....

Thanks for all info and ideas! One happy EEPROM burner extra!

xjmaas wrote:

BigEd wrote:

Can you write the 400 as two sets of 200?
(Edit: not as a workaround so much as an experiment)

Sorry, I stand corrected: I can write up to $180 bytes, if I send more, the Arduino 'hangs'. I tested this using the Arduino Serial Monitor, but also with other Serial terminal applications...



The meeprommer.py program I use, the Python 3 version, isn't receiving the '%' prompt, or so it seems....

EDIT:
I just tested it with meeprommer.py, I changed the python script to send $100 bytes a time. The first $100 bytes seem to be written correctly, but the sequence hangs during the second batch of $100 bytes.

[EugeneNine]

I was just reading up on this myself. Has anyone modified it to work with larger ROMs?
I want to be able to burn http://www.diagrom.com/

[jbourke]

Hi all,

Wanted to share my results of the MEEPROMMER site; thanks again Mario! Programming those AT28C256's works like a charm. For some reason only v1.1 of the Arduino sketch works reliably though. Also I couldn't get the Java app to work (I'm running W10x64) so I am using Martin_H's windows app; works great so thanks to you as well Martin!

BTW I am desiging a SBC based on the TMS9900 CPU; it has a non-multiplexed 16bits databus so it's either adding multiplex logic or splitting hex files into even and odd bytes over 2 EEPROM's. I chose the latter and found a great tool that can do this split:

https://sourceforge.net/projects/srecor ... p_redirect

Cheers,

John

[mkl0815]

Wow, this thread started exactly (Apr. 05 2013) 4 years ago and still somebody is using this little thing I created just as a simple tool for my project. It turned out that this spin-off has become quite usable in the community.
It's always a good idea to share your work with others it seems ...

[Martin_H]

@John, glad to hear you're finding the Windows App useful. Feel free to make suggestions for improvement.

[BigDumbDinosaur]

jbourke wrote:

Wanted to share my results of the MEEPROMMER site; thanks again Mario! Programming those AT28C256's works like a charm.

Hey! That's a nice-looking unit. Good job!

[jbourke]

Martin_H wrote:

@John, glad to hear you're finding the Windows App useful. Feel free to make suggestions for improvement.

Hi Martin,

"nice to have's":

- remember/fill COM and EEPROM selection from last session
- sizeable data window

again not essential

After having used your app a bit more I noticed that between individual commands it's good practice to execute "Show Version" otherwise it might lock up. I guess "Show Version" will put the programmer in a known state? It's probably my individual setup rather than your app though.

Cheers!

John