Hi, --- On Mon, Sep 28, 2009 at 5:43 PM, - <[email protected]> wrote: | I'm trying to access barcodes scanned and saved in a scanner's flash | memory. | | but the interface is | actually serial rather than "native" USB. \--
What are you referring to as "native" here? --- | [ 196.495529] usb 4-1: opticon converter now attached to ttyUSB0 \-- Yes, a serial interface. --- | Device Descriptor: | bNumConfigurations 1 | Configuration Descriptor: | ... \-- The device exports one configuration. --- | bNumInterfaces 1 | Interface Descriptor: | ... \-- That has one interface. --- | Endpoint Descriptor: | bEndpointAddress 0x81 EP 1 IN | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0040 1x 64 bytes | bInterval 5 \-- And one Bulk IN data transfer endpoint. So, if you send BULK IN requests from the USB host system, you will receive data from the scanner. --- | In MS Windows, the Opticon driver has to be configured to point to one | of COM1-3. \-- In your case, it is /dev/ttyUSB0 as seen from the output. --- | It then slurps the data into a default file containing the | barcode, the type of barcode format, and a timestamp. There is also a | settings option to configure the scanner (turn off timestamps, e.g.). \-- You can use libusb library to send specific requests to the device and read the responses. http://www.libusb.org/ Also refer their developers' guide: http://libusb.sourceforge.net/doc/function.usbbulkread.html If you have a USB (hardware) analyzer, you can capture the USB packets for this particular endpoint, or you can use the one (software) provided with the Linux kernel. SK -- Shakthi Kannan http://www.shakthimaan.com _______________________________________________ To unsubscribe, email [email protected] with "unsubscribe <password> <address>" in the subject or body of the message. http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
