Error reading usb device with libusb
Frédéric Mantegazza <[email protected]>
| Newsgroups | gmane.linux.usb.user |
|---|---|
| Organization | Home |
| Message-ID | <[email protected]> |
Hello, I'm using a USB DIY screen calibration sensor[1] with ArgyllCMS, a free calibration software[2]. The dialog with this sensor is very easy: just read/write like on serial bus. I made a python script for tests purpose, and it works fine using /dev/ttyACM0 (provided by cdc-acm driver). But in argyllcms, the developper used libusb, to be cross-plateform. And it does not work for me (it works on developper's computer). Here is what I get: Setting up the instrument hcfr: About to init coms hcfr: About to init USB icoms: About to set usb port characteristics icoms: About to open the USB port icoms: USB port needs opening icoms: About to open USB port 'usb:/bus0/dev92 (Colorimtre HCFR)' icoms: USB port is now open icoms: Clearing any USB errors icoms: usb port characteristics set ok hcfr: Doing break Break done, ICOM err 0x0 hcfr: About to init instrument hcfr: About to read firmware version icoms: Write_Read called with '\377' icoms: About to write '\377' ICOM err 0x0 icoms: Read called icoms: About to return read '' ICOM err 0x2000 icoms: Write_Read Write failed - returning 0x2000 hcfr_command failed hcfr: Error with getting or version of firmware The instrument can be removed from the screen. icoms: delete called icoms: closing port usb_close_port() called usb port has been released and closed dispcal: Error - dispread failed with 'Instrument Access Failed' 0x2000 is a timeout error. I tried to increase the value (up to 1 hour!) without success. At the same time, in the /var/log/messages, I can read: ttyS3: LSR safety check engaged! What does this mean? How can I debug usb com to find the problem? [1] http://www.homecinema-fr.com/colorimetre [2] http://www.argyllcms.com -- Frédéric http://www.gbiloba.org ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users