Aim
- Standalong logger with FAT support, logging to a CSV file, that can support a variety of ECUs.
Requirements
- 14V supply
- 3.3V internally
- SD/MMC socket
- DB9 connector
- Button for turning logging on and off, and setting the mode
- LCD for status indication and set-up
- Real time clock for logging time stamps
- 3.3V ECU with minimum 32KB Flash, 2KB SRAM
- 3.3V RS-232 with 1 channel
Specifications
- Atmel ATmega64 64/LQPF running at 8MHz
- Maxim MAX3227E 16/SSOP
- AVX Series 5638 SD card connector
- ...
Operation
- Unit is activated by ignition
- Select ECU by pressing and holding button
- Supported ECU is displayed on LCD
- ECU list scrolls while button is held
- ECU list stops and current ECU flashes when button is released
- ECU is selected when button is pressed again
- If not button is pressed within 3 seconds, the original ECU is retained
- Start and stop logging with a button press
- Logging status is displayed on LCD
- A new CSV file is created each time logging is started
- First field of logs has a timestamp