Forum Discussion
Altera_Forum
Honored Contributor
14 years agoHi,
On my Ubuntu system, removing the USB-Blaster, then clearing the kernel messages using 'sudo dmesg -c', and then re-inserting the USB-Blaster, I get the following output;
dwh@ubuntu:~$ dmesg
usb 2-1.2: new full speed USB device using ehci_hcd and address 13
dwh@ubuntu:~$ lsusb -d 09fb:6001 -v
Bus 002 Device 013: ID 09fb:6001 Altera
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x09fb Altera
idProduct 0x6001
bcdDevice 4.00
iManufacturer 1 Altera
iProduct 2 USB-Blaster
iSerial 3 91d28408
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 150mA
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 USB-Blaster
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 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)
dwh@ubuntu:~$ ls -al /dev/bus/usb/002/013
crw-rw-rw- 1 root root 189, 140 2011-08-25 08:30 /dev/bus/usb/002/013
I'm not sure why you are getting a message indicating 'invalid maxpacket 64', since that packet size is valid. I'd focus on trying to figure out why you are getting that message first. Plug in a development kit and try jtagconfig too. Cheers, Dave