I tried to change the USB Vendor ID of a FT245r with ftdi_eeprom (version
0.3-2, libftdi version 0.19-3, running on Linux) and it worked, BUT somehow the
max_packet_size of ftdi_context was set to zero. Is this a know feature?
---snip---
Bus 005 Device 011: ID 0403:8738 Future Technology Devices International, Ltd
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x8738
bcdDevice 6.00
iManufacturer 1 skoe
iProduct 2 EasyFlash 3
iSerial 3 A6008h2r
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 90mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 EasyFlash 3
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
---snip--
And the eeprom configuration file:
---snip---
filename="ef3.eeprom" # Filename, leave empty to skip file writing
vendor_id=0x0403 # Vendor ID
product_id=0x8738 # Product ID
max_power=45 # Max. power consumption: value * 2 mA. Use 0 if self_powered =
true.
###########
# Strings #
###########
manufacturer="skoe" # Manufacturer
product="EasyFlash 3" # Product
serial="A6008h2r" # Serial
###########
# Options #
###########
self_powered=false # Turn this off for bus powered
remote_wakeup=false # Turn this on for remote wakeup feature
use_serial=true # Use the serial number string
# Normally out don't have to change one of these flags
BM_type_chip=true # Newer chips are all BM type
in_is_isochronous=false # In Endpoint is Isochronous
out_is_isochronous=false # Out Endpoint is Isochronous
suspend_pull_downs=false # Enable suspend pull downs for lower power
change_usb_version=false # Change USB Version
usb_version=0x0200 # Only used when change_usb_version is enabled
---snip---
Best regards,
Tilmann Hentze.
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