Backup stock uBitx's calibration values

README.md

TLDR: Dump Stock Raduino's EEPROM using avrdude program. Once this EEPROM is dumped (and checked), we can always restore it back safely.

EEPROM size -> ATmega328 (Arduino Uno, Nano, Mini) -> 1024 bytes

Dump the EEPROM:

$ avrdude -patmega328p -carduino -P/dev/ttyUSB0 -b57600 -U eeprom:r:eeprom_dump_dhiru_v3.5-1.txt

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: reading eeprom memory:

Reading | ################################################## | 100% 1.86s

avrdude: writing output file "eeprom_dump_dhiru_v3.5-1.txt"

avrdude: safemode: Fuses OK (E:00, H:00, L:00)

avrdude done.  Thank you.

Sanity-check the size:

$ ls -la eeprom_dump_dhiru_v3.5-1.txt
-rw-rw-r-- 1 dhiru dhiru 1024 Aug  4 15:29 eeprom_dump_dhiru_v3.5-1.txt

Parse the EEPROM:

$ xxd eeprom_dump_dhiru_v3.5-1.txt
00000000: fb5c 0200 ffff ffff 1c0e b700 ffff ffff  .\..............
00000010: 6056 6c00 70e9 d700 ffff ffff 9600 ffff  `Vl.p...........
00000020: ffff ffff ffff ffff ffff ffff ffff ffff  ................
00000030: ffff ffff ffff ffff ffff ffff ffff ffff  ................
00000040: 13fb 5c02 00ff ffff ff1c 0eb7 00ff ffff  ..\.............
00000050: ffb0 196d 0070 e9d7 00ff ffff ff96 00ff  ...m.p..........
...

$ ipython
Python 3.8.2 (default, Apr 10 2020, 12:38:04)


In [2]: int("0x00025cfb", 16)  <- first 4 EEPROM byte in LE format => MASTER_CAL
Out[2]: 154875

In [3]: int("0x00b70e1c", 16)  <- BFO setting (USB_CAL)!
Out[3]: 11996700

These values match the ones read by uBITX_Manager_V1.11 (which works for custom non-factory firmwares only?).

[NEW] uBitx EEPROM parser:

$ python parser.py eeprom_dump_dhiru_v3.5-1.txt
Master Calibration (MASTER_CAL): 154875
USB Calibration (USB_CAL): 11996700 'BFO'

$ python parser.py eeprom_dump_dhiru_v3.5-larc-2021.txt
Master Calibration (MASTER_CAL): 121625
USB Calibration (USB_CAL): 11995800 'BFO'

python parser.py eeprom_dump_dhiru_v6-2022.txt
Master Calibration (MASTER_CAL): 180700
USB Calibration (USB_CAL): 11056300 'BFO'

[NEW] Windows Tips:

• [NEW] Extract (to a writable folder) and use the included avrdude.zip. Just click on the included dump.bat.

[OLD] Windows Tips:

• Install Arduino IDE

• Find avrdude.conf and avrdude.exe on your computer. Copy avrdude.conf next to avrdude.exe.

• You may need to add -F flag to the avrdude command. Also, you may need to copy avrdude.exe and its dependencies to a new writable folder.

• Get latest Python from https://www.python.org/downloads/windows/.

• Yes, Windows gets in the way, more often than not.

Backup stock uBitx's calibration values.txt

Dump-EEPROM-On-Windows.png

Makefile

stuff:
	fyne-cross windows "-arch=*" -ldflags="-s"
	upx ./fyne-cross/bin/windows-amd64/ubitx-eeprom-dump.exe
	cp ./fyne-cross/bin/windows-amd64/ubitx-eeprom-dump.exe parser.exe

deps:
	go get -u github.com/fyne-io/fyne-cross

avrdude.zip

eeprom_dump_dhiru_v3.5-1.txt

eeprom_dump_dhiru_v3.5-larc-2021.txt

eeprom_dump_dhiru_v6-2022.txt

main.go

parser.exe

parser.py

uBitx v4 - original settings.png