Try "lsusb -vv" and cut off everything that is not related to your device. I
would like to give a look on your descriptor hierarchy.
Heres the verbose descriptor information for my device:
[nckelley@hawc02 pci0000:00]$ lsusb -vv -d 0403:6001
Bus 004 Device 007: ID 0403:6001 Future Technology Devices International,
Ltd FT232 USB-Serial (UART) IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6001 FT232 USB-Serial (UART) IC
bcdDevice 4.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
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
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
cannot read device status, Operation not permitted (1)
I see two endpoint addresses in there, 0x81 and 0x02, one of those?. Is
there a function(s) in pyusb to use this (seemingly only) interface and one
of those endpoints?
And, this is all device-specific, and not OS-dependent, right? My goal is
to use pyusb on a mac...(it worries me slightly to have to use a linux
machine/commands to hunt down all this info).
--
Nathan
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