Dear All,
I have my new USB device which is compliant to CDC class.
When I connect the device to Windows system, it was able to load the
default CDC driver. Also, I am able to do serial communication through
my device using Hyper terminal.
But, When I connect the device to the Linux (Kernel 2.6.31.4), I am
not able to communicate with the device.
The process I followed to make the driver enable in LInux is,
1) Loaded the usbserial driver with the following command
#modprobe usbserial vendor=xxxx product=xxxx
(With this command, I was able to see ttyUSB in /proc/devices)
2) #mknod /dev/ttyUSB0 c 188 0
After giving the above two commands, I tried opening the device in my
application through open("/dev/ttyUSB0", O_RDONLY);
but it went in vain. The open() returned -1.
The debug messages I captured after connecting the device to the
LInux system are,
-------------------------------------------------------
[32646.880029] usb 2-2: new full speed USB device using uhci_hcd and address 12
[32647.053397] usb 2-2: configuration #1 chosen from 1 choice
[32647.056423] cdc_acm 2-2:1.0: This device cannot do calls on its
own. It is not a modem.
[32647.056452] cdc_acm 2-2:1.0: ttyACM2: USB ACM device
[32647.296031] usb 3-1: new full speed USB device using uhci_hcd and address 12
[32647.450676] usb 3-1: configuration #1 chosen from 1 choice
---------------------------------------------------------
I don't know, whether I am following the correct procedure to
communicate with my CDC device.
Any help is appreciated.
Regards,
RD
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