This is a simple serial EEPROM programmer (SPI and I2C) that I developed to help with development of my TGL-6502 project. It is based around an ATtiny84 and uses the Arduino core for that chip.
For full documentation on the project including the communications protocol please see the project page on The Garage Lab website.
At the moment I only support EEPROMS that I have in my parts collection. The pin outs and command sets for most serial EEPROMS are very similar so adding support for other types would not be difficult.
| Part | Interface | Total Size | Page Size | Address Size | EEProg ID |
|---|---|---|---|---|---|
| 24C65 | I2C | 64Kbit (8K x 8) | 64 bytes | 16 bit | (TBD) |
| 24LC1025 | I2C | 1Mbit (128K x 8) | 128 bytes | 16 bit + block | (TBD) |
| 25AA1024 | SPI | 1Mbit (128K x 8) | 256 bytes | 24 bit | 0x7830 |
| 25LC1024 | SPI | 1Mbit (128K x 8) | 256 bytes | 24 bit | 0x7830 |
| 25AA640 | SPI | 64Kbit (8K x 8) | 32 bytes | 16 bit | 0x4620 |
The repository contains a simple Windows GUI client that can be used to load raw binary files into an EEPROM and to extract the existing contents of an EEPROM to a file. This client is implemented in C# and provided as a Visual Studio solution - you can use the Community Edition to compile and modify it.
The programmer is controlled over a serial port (57600 8/N/1) using a very simple ASCII based protocol that support partial page writes and reading/writing arbitrary locations in the EEPROM so the client could be extended to add support for these features. I will probably start adding these features as I need them as well as writing a Linux command line version of the programmer. If you want to add the features please feel free to send me a patch or a pull request so I can add them to the repository.