Working ftdi eeprom
From Milkymist Wiki
I modifie the ftdi_eeprom, from the libftdi-1.0 GIT [1] .
You can first Build the libftdi-1.0 and new ftdi_eeprom
Contents |
[edit] Change
- must specifie a device-file (to ensure you flash this you want)
Syntax sample : ./ftdi_eeprom --read-eeprom /dev/bus/usb/002/003 ftdi-backup.conf ./ftdi_eeprom --erase-eeprom /dev/bus/usb/002/003 ./ftdi_eeprom --flash-eeprom /dev/bus/usb/002/003 ftdi-source.conf
- backup eeprom in a conf-file (more easy to edit)
- no use of raw file (useless)
[edit] Find the device-file
Use lsusb in root :
(root)# lsusb Bus 007 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 057: ID 20b7:0713 Bus 002 Device 004: ID 05a9:7670 OmniVision Technologies, Inc. OV7670 Webcam Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
You search for VID and PID of Milkymist JTAG, 20b7:0713, and get the Bus ID 002 and Device ID 057
On Linux, you construct the device-file name like this /dev/bus/002/057
Note : the Device ID increment if you replug the device
[edit] MM1 JTAG Config-file
The config-file I use ftdi-source.conf :
vendor_id=0x20b7 product_id=0x0713 self_powered=false remote_wakeup=false chip_type=2232H max_power=0 in_is_isochronous=false out_is_isochronous=false suspend_pull_downs=false use_serial=false change_usb_version=false usb_version=0 manufacturer="Milkymist" product="Milkymist USB JTAG/Serial" serial="08-15"
[edit] Caution (RESET)
I only test this with the 2232H of the Milkymist JTAG.
Use with caution.
If the eeprom is blank, --read-eeprom make a config-file with blank parameter.
The --read-eeprom command don't generate the invert en cbus parameter
If you break the config of the cable (your OS don't see it), you can reset with :
- unplug the cable
- put the pin 1 of the eeprom to the ground (USB connector is easy)
- plug the cable and verifie your OS found it
- remove the shunt without unplug the cable
- erase or reflash it
- replug-it and verifie
