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Cypress-USB2UART-Ver1.0G driver for Linux?

Former Member

Hi,

I would like to use my Linux PC to connect to my Zedboard. However, I can't seem to find a driver for the UART. It's visible using lsusb:

lsusb -s 1:6  
Bus 001 Device 006: ID 04b4:0008 Cypress Semiconductor Corp.

And I observe it in the kernel log:

[  460.188289] usb 1-5.1: New USB device found, idVendor=04b4, idProduct=0008
[  460.188298] usb 1-5.1: New USB device strings: Mfr=1, Product=2, SerialNumber=4
[  460.188303] usb 1-5.1: Product: Cypress-USB2UART-Ver1.0G
[  460.188307] usb 1-5.1: Manufacturer: 2012 Cypress Semiconductor
[  460.188310] usb 1-5.1: SerialNumber: 044301C42216
[  460.188439] usb 1-5.1: usb_probe_device
[  460.188445] usb 1-5.1: configuration #1 chosen from 1 choice
[  460.190763] usb 1-5.1: adding 1-5.1:1.0 (config #1, interface 0)
[  460.191036] usb 1-5.1: adding 1-5.1:1.1 (config #1, interface 1)
[  460.191137] drivers/usb/core/inode.c: creating file '006'

But no tty driver.

I have CONFIG_USB_SERIAL_CYPRESS_M8=y in my .config file, but this appears to be a different driver.

I tried to follow the link in the datasheet, but I was asked to register at the Cypress web site. But after entering the information I simply got a message saying:

"Sorry, there was an error. Site admins have been contacted with your information and error details."

Anybody using the Zedboard from a Linux host?

  • 0

    This link might be helpful: http://www.cypress.com/?app=forum&id=167&rID=67355

     

    You could also take a look at Sven Anderssons' blog: http://svenand.blogdrive.com/archive/160.html#.VGTcR_nF840

     

    Sven steps through installing the Xilinx tools and developing on Ubuntu (in a Virtual Machine).

     

    -Gary

  • 0

    Thanks TroutChaser

    But I have this already enabled:

    # grep CONFIG_USB_ACM .config
    CONFIG_USB_ACM=y

    But still I don't get any /dev/ttyM*

    ls -l /dev/ttyA*
    ls: cannot access /dev/ttyA*: No such file or directory


    I have two other USB serial interfaces on my machine and they work fine:

    ls -l /dev/ttyU*
    crw-rw---- 1 root uucp 188, 0 Nov 14 16:58 /dev/ttyUSB0
    crw-rw-rw- 1 root uucp 188, 1 Nov 14 16:58 /dev/ttyUSB1

    But they are FTDI devices.

    I have Vivado set up on native Linux. The only thing I need to get working is the Cypress driver and the JTAG interface.

  • 0

    Hi pegu,

     

    It sounds like you are getting very close to having it working, it is probably a configuration issue at this point rather than a driver one.

     

    For the benefit of the rest of the community, can you detail which Linux distro you are using?

     

    The Cypress USB UART device on ZedBoard is known to enumerate correctly as a /dev/ttyACM0 device out of the box so far with Ubuntu 10.04 LTS, Ubuntu 12.04.3, CentOS 6.3, and CentOS 6.6 Desktop installs.

     

    Regards,

     

    -Kevin

  • 0

    Hi zedhed, I'm using Gentoo. As I mentioned my other USB serial drivers appears to be working fine.

    It might be that I'm missing support for the character driver or something. If somebody has a working Linux system a "lsmod" and a "cat /proc/devices" could be useful.

  • 0

    Typical, it was all my fault. I messed up my kernel files in grub. Now I'm using the correctly configured kernel and it works fine to access.

    Thanks a lot for all help and suggestions.

    Here's some output in case somebody else ends up here using google:

    $ gzip -dc /proc/config.gz | grep CONFIG_USB_ACM
    CONFIG_USB_ACM=y
    # grep ACM /proc/devices
    166 ttyACM


    and dmesg shows:

    [    5.377185] usb 1-5.1: Product: Cypress-USB2UART-Ver1.0G
    [    5.377257] usb 1-5.1: Manufacturer: 2012 Cypress Semiconductor
    [    5.377329] usb 1-5.1: SerialNumber: 044301C42216
    [    5.377853] usb 1-5.1: usb_probe_device
    [    5.377864] usb 1-5.1: configuration #1 chosen from 1 choice
    [    5.380203] usb 1-5.1: adding 1-5.1:1.0 (config #1, interface 0)
    [    5.380645] cdc_acm 1-5.1:1.0: usb_probe_interface
    [    5.380657] cdc_acm 1-5.1:1.0: usb_probe_interface - got id
    [    5.380662] cdc_acm 1-5.1:1.0: This device cannot do calls on its own. It is not a modem.
    [    5.380920] cdc_acm 1-5.1:1.0: ttyACM0: USB ACM device

  • 0

    Hi pegu,

    Glad to hear you got this working now!

    Thank you for following up on this thread and posting the results for the rest of the Zed community.

    Regards,

    -Kevin