Linux/FTDI - Revision history

Kenneth: /* ftdi_eeprom help */

2025-12-06T09:16:08Z

ftdi_eeprom help

@@ Line 198: / Line 198: @@
 --verbose               Print more information
 </pre>
 === UDEV ===

Kenneth: /* FTDI Programming */

2025-12-06T08:51:18Z

FTDI Programming

@@ Line 35: / Line 35: @@
   ftdi_eeprom --read-eeprom ftdi.conf
   ftdi_eeprom --verbose --read-eeprom ftdi.conf
   ftdi_eeprom --device i:0x0403:0x6011 --read-eeprom ftdi.conf
 ftdi.conf:
@@ Line 51: / Line 55: @@
 </pre>
 ---

Kenneth: /* FTDI Programming */

2025-12-06T08:46:49Z

FTDI Programming

@@ Line 33: / Line 33: @@
 ---
-ftdi_eeprom --read-eeprom ftdi.conf
+ ftdi_eeprom --read-eeprom ftdi.conf
-ftdi_eeprom --device i:0403:6011 --read-eeprom ftdi_out.conf
+ ftdi_eeprom --verbose --read-eeprom ftdi.conf
----
+ftdi.conf:
 <pre>
 vendor_id=0x0403
@@ Line 51: / Line 50: @@
 filename="eeprom.new"
 </pre>
 ---
@@ Line 156: / Line 160: @@
 https://chromium.googlesource.com/chromiumos/third_party/libftdi/+/b790d38e9fac3e2144293a84bfc6de72b01a6c6d/src/ftdi.c
 === UDEV ===

Kenneth: /* FTDI Programming */

2025-12-06T08:35:34Z

FTDI Programming

← Older revision		Revision as of 08:35, 6 December 2025
Line 12:		Line 12:
	== FTDI Programming ==		== FTDI Programming ==

	apt install ftdi-eeprom		sudo apt install ftdi-eeprom

			sudo modprobe ftdi_sio
			sudo udevadm info -a /dev/ttyUSB0 \| less

			sudo modprobe -r ftdi_sio

	~~modprobe -r ftdi_sio~~
	ftdi_eeprom --read-eeprom asmith.conf		ftdi_eeprom --read-eeprom asmith.conf

Line 26:		Line 30:
	ATTRS{idVendor}=="0403"		ATTRS{idVendor}=="0403"


			---

			ftdi_eeprom --read-eeprom ftdi.conf
			ftdi_eeprom --device i:0403:6011 --read-eeprom ftdi_out.conf

	---		---

Kenneth: /* FTDI Programming */

2020-11-05T20:14:19Z

FTDI Programming

New page

== FTDI Driver ==

To detect the FTDI device, install the extra module package:
apt install linux-image-extra-`uname -r`

Then either reboot, or manually load the module
modprobe ftdi_sio

Find with:
/dev/ttyUSB0

== FTDI Programming ==

apt install ftdi-eeprom

modprobe -r ftdi_sio
ftdi_eeprom --read-eeprom asmith.conf

modprobe ftdi_sio
tio /dev/ttyUSB0

udevadm info -a -p $(udevadm info -q path -n /dev/ttyUSB0) | less

ATTRS{idProduct}=="6011"
ATTRS{idVendor}=="0403"

---

mydevice.conf:
<pre>
vendor_id=0x0403
product_id=0x6011

max_power=0

manufacturer="Aznot"
product="Aznot Device"
serial="1944d0021"

filename="eeprom.new"
</pre>

---

<pre>
# ftdi_eeprom --read-eeprom test.conf

FTDI eeprom generator v0.17
(c) Intra2net AG and the libftdi developers <opensource@intra2net.com>
FTDI read eeprom: 0
EEPROM size: 128
FTDI close: 0
</pre>

---

<pre>
# ftdi_eeprom --erase-eeprom asmith.conf

FTDI eeprom generator v0.17
(c) Intra2net AG and the libftdi developers <opensource@intra2net.com>
FTDI read eeprom: 0
EEPROM size: -1
FTDI erase eeprom: 0
Used eeprom space: 224 bytes
Writing to file: eeprom.new
FTDI close: 0
</pre>

---

<pre>
# ftdi_eeprom --flash-eeprom asmith.conf

FTDI eeprom generator v0.17
(c) Intra2net AG and the libftdi developers <opensource@intra2net.com>
FTDI read eeprom: 0
EEPROM size: -1
Used eeprom space: 96 bytes
FTDI write eeprom: 0
Writing to file: eeprom.new
FTDI close: -1
</pre>

---

<pre>
# ftdi_eeprom --flash-eeprom asmith.conf

FTDI eeprom generator v0.17
(c) Intra2net AG and the libftdi developers <opensource@intra2net.com>
FTDI read eeprom: 0
EEPROM size: 256
Used eeprom space: 224 bytes
FTDI write eeprom: 0
Writing to file: eeprom.new
FTDI close: 0
</pre>

---

<pre>
[18849.738246] usb 1-5: new high-speed USB device number 6 using xhci_hcd
[18849.880956] usb 1-5: New USB device found, idVendor=0403, idProduct=6011
[18849.880957] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[18849.880958] usb 1-5: Product: Aznot Device
[18849.880959] usb 1-5: Manufacturer: Aznot
[18849.882541] ftdi_sio 1-5:1.0: FTDI USB Serial Device converter detected
[18849.882555] usb 1-5: Detected FT4232H
[18849.882635] usb 1-5: FTDI USB Serial Device converter now attached to ttyUSB0
[18849.883942] ftdi_sio 1-5:1.1: FTDI USB Serial Device converter detected
[18849.883953] usb 1-5: Detected FT4232H
[18849.884028] usb 1-5: FTDI USB Serial Device converter now attached to ttyUSB1
[18849.885338] ftdi_sio 1-5:1.2: FTDI USB Serial Device converter detected
[18849.885349] usb 1-5: Detected FT4232H
[18849.885423] usb 1-5: FTDI USB Serial Device converter now attached to ttyUSB2
[18849.886763] ftdi_sio 1-5:1.3: FTDI USB Serial Device converter detected
[18849.886779] usb 1-5: Detected FT4232H
[18849.886866] usb 1-5: FTDI USB Serial Device converter now attached to ttyUSB3
</pre>

---

<blockquote>
that means that the EEPROM is erased (all 0xff);
see ftdi_read_eeprom() in ftdi.c: "Guesses size of eeprom ... will not
work with blank eeprom"

> Checksum Error: aaaa 0000
> Malloc failed, aborting

these errors follow from EEPROM size being -1

with an erased EEPROM the FTDI chip falls back to the default
vendor:product (which is 0403:6011)
</blockquote>

ref: [http://libftdi.141977.n3.nabble.com/Reading-Writing-FT4232-EEPROM-td4025376.html]

---

Source:

https://chromium.googlesource.com/chromiumos/third_party/libftdi/+/b790d38e9fac3e2144293a84bfc6de72b01a6c6d/src/ftdi.c

=== UDEV ===

See [[Linux/udev]]

== Notes ==

Barnaby Walters • How to read and program the EEPROM and configuration of FTDI FT2xx ICs on Linux or Mac OS X
https://waterpigs.co.uk/articles/ftdi-configure-mac-linux/

Flashing the FTDI EEPROM under linux · mozilla-sensorweb/sensorweb-wiki Wiki · GitHub
https://github.com/mozilla-sensorweb/sensorweb-wiki/wiki/Flashing-the-FTDI-EEPROM-under-linux

developer.intra2net.com Git - libftdi/blob - README.build
http://developer.intra2net.com/git/?p=libftdi;a=blob;f=README.build

After updating the EEPROM, you should unplug and replug the board.

== keywords ==