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Serial 16550 Uart driver flow control implementation

Gopi Ravada
Prodigy 100 points
Other Parts Discussed in Thread: NDKTCPIP, TL16C550C, TL16C750, TL16C450, TL16C554, CCSTUDIO

Hi,

I want to implement the flow control stuff on OMAP3703 Processor which has 16550 compatible uart driver.\

So antbody please give me steps to do this?

Thanks,

-Gopi

  • 0
    TI__Genius 10545 points

    This link could help you.

    http://e2e.ti.com/support/omap/f/849/p/212292/754188.aspx#754188

  • 0 in reply to Manuel Contreras
    Prodigy 100 points

    Thanks for u r help,

    But i am using uart model 16550, but i didn't find any code regarding flowcontrol.

    Please help me

    -Gopi

  • 0 in reply to Gopi Ravada
    TI__Genius 10545 points

    In OMAP4 4470 there are 2 sections about it

    24.3.5.1.2.1 Hardware Flow Control Configuration
    24.3.5.1.2.2 Software Flow Control Configuration

    but I imagine you already checked those links.

    http://e2e.ti.com/support/omap/f/849/p/202194/718105.aspx

    http://e2e.ti.com/support/omap/f/849/p/218431/769507.aspx#769507

    other is search for the NDKTCPIP mentioned in previous post (http://www.ti.com/tool/ndktcpip), there is a reference to serial code and HW flow control

    http://www.ti.com/litv/pdf/spru524h

    The value of flowctrl indicates the desired flow control operation. Legal values for this
    parameter are:
    HAL_SERIAL_FLOWCTRL_NONE
    HAL_SERIAL_FLOWCTRL_HARDWARE
    No Flow Control
    Hardware Flow Control

  • 0 in reply to Manuel Contreras
    Prodigy 100 points

    I am using OMAP3703 processor. In that i am unable to process flowcontroll. Please help me if there is a peace of code for flowcontroll in OMAP3703

  • 0 in reply to Gopi Ravada
    TI__Genius 10545 points

    Gopi,

    Can you post the question in OMAP35x Processors Forum?

    I going to keep searching for NDK code that has the serial code and see if it is useful for your case.

  • 0 in reply to Manuel Contreras
    TI__Genius 10545 points

    I found it,

    from TI.com search using 16550

    http://www.ti.com/lit/ds/slls191c/slls191c.pdf

    "The TL16C750 is a functional upgrade of the TL16C550C asynchronous communications element (ACE),
    which in turn is a functional upgrade of the TL16C450."

    In this same document you can find the diagrams and instructions for flow control, both SW and HW.

    from here to

    http://www.ti.com/lit/ds/symlink/tl16c554.pdf

    where you can find the information to the specific device

    then searching in NDK there is a note "The serial client and serial router examples are no longer provided with the NDK and NSP."

    http://www.ti.com/lit/ug/spru523h/spru523h.pdf

    this document is for NDK version 2.2, then searching for the version 2.0.

    in the NDK document it is mentioned a download site that leads to next link

    http://processors.wiki.ti.com/index.php/Category:NDK

    in this link it is the download site

    http://processors.wiki.ti.com/index.php/Source_code_for_the_NDK

    and then by selecting NDK version 2.0 there is a .exe to install the src directory mentioned for serial code.

    http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/ndk/2_00_00/index_FDS.html

    one time installed next directory location shows the serial source code for tl16c752

    c:/CCStudio_v3.3/ndk_2_0_0/packages/ti/ndk/src/hal/evmdm642/ser_ti752

    the issue in the past was the I was looking download file for version 2.2 or newer versions, source code is available only in 2.0.

    I am mentioning the full path because it contains and explains some important documents.

  • 0 in reply to Manuel Contreras
    Prodigy 100 points

    I am using OMAP3703 processor. In that i am unable to process flowcontroll. Please help me if there is a peace of code for flowcontroll in OMAP3703

  • 0 in reply to Gopi Ravada
    Prodigy 100 points

    Yes Thanks A Lot ..I Will try with code

    -gopi