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DM365: PSP g_serial and u-boot usbtty

Gunter Schmer
Genius 14242 points

Hi,

 

while I am going to do some testing on the kernel g_serial support and usbtty support in u-boot, could someone tell me whether there are any issues with getting both to work, based on for example

http://arago-project.org/files/releases/davinci-psp_3.x.0.0-r35/

or the davinci staging git repos

http://arago-project.org/git/people/?p=sandeep/u-boot-davinci.git;a=summary

http://arago-project.org/git/people/?p=sneha/linux-davinci-staging.git;a=summary

 

Thanks,

--Gunter

 

 

  • 0
    TI__Genius 14242 points

    Hi,

     

    we have been focussing on the usbtty support for u-boot on the dm365 evm. For this we have cloned the denx u-boot git at http://git.denx.de/?p=u-boot.git;a=summary and enabled usbtty in the dm365 evm configuration header file. The steps are as follows

    1 -- after the u-boot with usbtty support is running on the dm365, we plug in the usb cable into the linux host and the cdc device enumerates itself and creates the /dev/ttyACM0 on the host. The lsusb shows that there are two bulk EPs, one for RX and one for TX.

    2 -- we can then start a minicom on /dev/ttyACM0

    3 -- on another minicom that is connected to standard /dev/ttyS0 and uart we can type, and everything is echoed on the /dev/ttyACM0, which means that the TX side of the usbtty seems to work fine.

    4 -- If we type on the minicom /dev/ttyACM0, nothing happens, which means that the RX on the usbtty does not seem to work.

    Has anyone tested this at all on a dm365 device?

     

    Thanks,

    --Gunter

  • 0 in reply to Gunter Schmer
    TI__Genius 14242 points

    Hi,

     

    could someone comment on the support of usbtty in the u-boot for the dm365 and our questions above? Has anyone done testing on this?

     

    Thanks,

    --Gunter

  • 0 in reply to Gunter Schmer
    Intellectual 350 points

    Hi Gunter,

     

    Did you ever crack this one? We'd like to use usbtty rather than the UART for console access to the dm365.

     

    Thanks,

     

    Alex