EEPROMProgrammer
EEPROM Programmer Written in Python and C for Raspberry Pi 3
Inspired by Ben Eater's 6502 breadboard computer kit, this EEPROM programmer tool kit designed for the AT28C256 EEPROM.
While experimenting with writing this script in Python, I found the write timing to be imprecise. Thus, for reading EEPROM contents, the python script is fine, but when writing, the c script should be used.
Hardware setup
I recomment a Raspberry Pi breakout board like this one.
$ gpio readall will show you the pinouts for different pin numbering systems. We will use the BCM/wPi numbering. Connections should be as followed (following the BCM pin numbering):
| EEPROM | BCM | wPi |
|---|---|---|
| A0 | 10 | 12 |
| A1 | 9 | 13 |
| A2 | 11 | 14 |
| A3 | 25 | 6 |
| A4 | 8 | 10 |
| A5 | 7 | 11 |
| A6 | 5 | 21 |
| A7 | 6 | 22 |
| A8 | 12 | 26 |
| A9 | 13 | 23 |
| A10 | 19 | 24 |
| A11 | 26 | 25 |
| A12 | 16 | 27 |
| A13 | 20 | 28 |
| A14 | 21 | 29 |
| D0 | 14 | 15 |
| D1 | 15 | 16 |
| D2 | 18 | 1 |
| D3 | 17 | 0 |
| D4 | 27 | 2 |
| D5 | 22 | 3 |
| D6 | 23 | 4 |
| D7 | 24 | 5 |
Usage
For reading $ python3 programmer.py
To compile the c file, run $ gcc -Wall -o programmer programmer.c -lwiringPi
For writing a binary file $ ./programmer <filename>
For creating binary file edit makerom.py, then run $ python3 makerom.py