Reading programs from external EEPROM
Moderator: frank
-
- Posts: 3
- Joined: Sat Nov 13, 2010 2:24 pm
Reading programs from external EEPROM
Hi There!
I'm designing a product that uses the FV-1 and the usage of an external EEPROM is a must. I'd like to use the compressor program available at spinsemi website.
Well, I bought the 24LC32A eeprom and I succeeded programming it using the PonyProg:
http://www.lancos.com/prog.html
After programming and reading the eeprom to assure everything was alright, I've put it on FV-1's board and set the T1 pin high to load the program from the eeprom.
For my suprise, it doesn't work anyway. I've tried to switch between the 8 possible combinations of the program selector, but nothing happens anyway. I've already tried reprogramming it using another program, and still the same problem.
The trace lengths (I2C bus) between the eeprom and FV-1 is very short. all the address pins of the EEPROM are tied to the ground, according to FV-1's datasheet.
It works normally reading programs from the internal ROM by the way, and it's using the 32.768Khz xtal.
What am I possibly missing?
Thank you very much!
Best Regards
I'm designing a product that uses the FV-1 and the usage of an external EEPROM is a must. I'd like to use the compressor program available at spinsemi website.
Well, I bought the 24LC32A eeprom and I succeeded programming it using the PonyProg:
http://www.lancos.com/prog.html
After programming and reading the eeprom to assure everything was alright, I've put it on FV-1's board and set the T1 pin high to load the program from the eeprom.
For my suprise, it doesn't work anyway. I've tried to switch between the 8 possible combinations of the program selector, but nothing happens anyway. I've already tried reprogramming it using another program, and still the same problem.
The trace lengths (I2C bus) between the eeprom and FV-1 is very short. all the address pins of the EEPROM are tied to the ground, according to FV-1's datasheet.
It works normally reading programs from the internal ROM by the way, and it's using the 32.768Khz xtal.
What am I possibly missing?
Thank you very much!
Best Regards
-
- Posts: 3
- Joined: Sat Nov 13, 2010 2:24 pm
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am
In this case the EEPROM was not being programmed properly, once that was fixed in the programmer it worked properly.
Exactly what are you doing, can you post a schematic, etc?
Exactly what are you doing, can you post a schematic, etc?
Frank Thomson
Experimental Noize
Experimental Noize
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am
We may still be able to get it to work, exactly what steps are you doing, what files are you loading, etc.
Frank Thomson
Experimental Noize
Experimental Noize
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am
I don't know if this is the programmer you are using but this site may be of some help: http://hackingbtbusinesshub.wordpress.c ... ory/ch341/
Frank Thomson
Experimental Noize
Experimental Noize
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am
Are you sure you are putting the eeprom in the correct position in the socket? If you are, then it sounds like a bad programmer.
Frank Thomson
Experimental Noize
Experimental Noize
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am
What errors do you get? Does it complain about the file format, the device, the socket, the driver, etc?
Frank Thomson
Experimental Noize
Experimental Noize
-
- Posts: 10
- Joined: Wed May 04, 2011 4:43 am