ubuntu/xr-usb-serial/README.txt

   1 Exar USB Serial Driver
   2 ======================
   3 Version 1A, 1/9/2015
   4
   5 This driver will work with any USB UART function in these Exar devices:
   6         XR21V1410/1412/1414
   7         XR21B1411
   8         XR21B1420/1422/1424
   9         XR22801/802/804
  10
  11 The source code has been tested on various Linux kernels from 3.6.x to 3.17.x.
  12 This may also work with newer kernels as well.
  13
  14
  15 Installation
  16 ------------
  17
  18 * Compile and install the common usb serial driver module
  19
  20         # make
  21         # insmod ./xr_usb_serial_common.ko
  22
  23
  24 * Plug the device into the USB host.  You should see up to four devices created,
  25   typically /dev/ttyXRUSB[0-3].
  26
  27
  28 Tips for Debugging
  29 ------------------
  30
  31 * Check that the USB UART is detected by the system
  32
  33         # lsusb
  34
  35 * Check that the CDC-ACM driver was not installed for the Exar USB UART
  36
  37         # ls /dev/tty*
  38
  39         To remove the CDC-ACM driver and install the driver:
  40
  41         # rmmod cdc-acm
  42         # modprobe -r usbserial
  43         # modprobe usbserial
  44         # insmod ./xr_usb_serial_common.ko
  45
  46
  47 Technical Support
  48 -----------------
  49 Send any technical questions/issues to uarttechsupport@exar.com.
  50