This limit is not imposed in init? Or may I guess - speed is not changed if lower than limit?
Anyway many thanks for fast action.

Tom

On 15.3.2015 15:25, Simon Qian wrote:
OK, I know the problem, in vsllink code, for SWD speed, the min speed configurable is 72000.
I will add and test other lower speed.

------------------------------------------------------------------------
open...@versaloon.com

    *From:* Tomas Vanek <mailto:tom_...@users.sourceforge.net>
    *Date:* 2015-03-15 22:16
    *To:* Simon Qian <mailto:open...@versaloon.com>
    *CC:* openocd-devel <mailto:openocd-devel@lists.sourceforge.net>
    *Subject:* Re: [OpenOCD-devel] vsllink silently ignores changes in
    adapter_khz after init
    I discovered the problem testing http://openocd.zylin.com/2604 on
    top of fresh git master.
    at91sam4lXX.cfg includes at91sam4XXX.cfg and it sets adapter_khz 500
    Changed version of at91sam4lXX.cfg adjusts to adapter_khz 50 for
    low initial clock of "L" version. Works on ftdi, without an effect
    on vsllink.
    Basically you can try any SWD-connected MCU and change adapter_khz
    manually after init to minimum and compare speed of mdw before and
    after
    (or better use an oscilloscope)

    Tom

    On 15.3.2015 14:33, Simon Qian wrote:
    I will do a test by connecting telnet, and modify the adapter_khz
    and do a mdw command, and will report the result tomorrow.

    ------------------------------------------------------------------------
    open...@versaloon.com

        *From:* Simon Qian <mailto:open...@versaloon.com>
        *Date:* 2015-03-15 19:55
        *To:* Tomas Vanek <mailto:tom_...@users.sourceforge.net>
        *CC:* openocd-devel <mailto:openocd-devel@lists.sourceforge.net>
        *Subject:* Re: [OpenOCD-devel] vsllink silently ignores
        changes in adapter_khz after init
        Do you have the script? I will do the same test.

        ------------------------------------------------------------------------
        open...@versaloon.com

            *From:* Tomas Vanek <mailto:tom_...@users.sourceforge.net>
            *Date:* 2015-03-15 19:43
            *To:* Simon Qian <mailto:open...@versaloon.com>
            *CC:* openocd-devel
            <mailto:openocd-devel@lists.sourceforge.net>
            *Subject:* Re: vsllink silently ignores changes in
            adapter_khz after init
            Yes, I tested it only on swd. swd keeps the speed set in
            init.

            Tom

            On 15.3.2015 12:32, Simon Qian wrote:
            Hi,
            I remember vsllink can support changing the JTAG speed.
            I will do a test and reply soon.

            
------------------------------------------------------------------------
            open...@versaloon.com

                *From:* Tomas Vanek <mailto:tomas.va...@fbl.cz>
                *Date:* 2015-03-15 18:35
                *To:* Simon Qian <mailto:open...@versaloon.com>
                *CC:* OpenOCD ML
                <mailto:openocd-devel@lists.sourceforge.net>
                *Subject:* vsllink silently ignores changes in
                adapter_khz after init
                Hi Simon,
                would be possible to implement changing of vsllink
                speed on the fly?
                Some MCUs running at low clock freq after reset need it.
                It also breaks some configs where one speed is set
                in included cfg and
                then changed to another.
                Thanks
                     Tom




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