Re: [OpenOCD-user] STM32L4: failing to run program after flashing

[Leonardo S. d. S. <leo...@gm...>]

Hello Nazmul,

I have a suggestion that might be worth a try.

I've had difficulty with low-power modes on STM32. I was using an STM32L0
Discovery board. In my case, the software that was already programmed on
the chip put the CPU in a low-power mode (usually Stop Mode) immediately
after reset. The debug interface gets disabled by default (this is
configurable, but OpenOCD needs a chance to do it) and the connection fails.

To be honest, it does not look like the same problem you are having (you
would be getting completely dropped connections), but it is worth a try.

Hold down the reset button on the board. Enter the "reset init"  or "reset
halt" command and release the reset button right after you press enter. See
if the reset command works. You can try flash write_image afterwards.

But make sure to use the right image for your board. What is the point of
flashing an F4 image on an L4?

Regards,

Leonardo




On Fri, Jun 30, 2017 at 12:28 AM, Nazmul Alam <fad...@gm...> wrote:

> Hi Santos,
> My bad. Here are the details -
>
> Board - STM32L4Discovery (STM32L475VG)
> Debug Adapter - STLink v2.1
> OpenOCD - Open On-Chip Debugger 0.10.0+dev-00161-g1725abc
> (2017-06-28-21:51)
> Config - board/stm32l4discovery.cfg
>
> Regards,
>
>
> On Thu, Jun 29, 2017 at 8:04 AM, <ka...@as...> wrote:
>
>> Karl Hammar:
>> > Karl Hammar:
>> ...
>> > and the above shortens to:
>> >
>> > %.flash: %.elf
>> >       @echo FLASH $<
>> >       @openocd -f openocd.cfg \
>> >                   -c "program $(*).elf reset" \
>> >                   -c "shutdown" $(NULL)
>> >       @touch $@
>>
>>
>> %.flash: %.elf
>>         openocd -f openocd.cfg -c "program $(*).elf reset exit"
>>         @touch $@
>>
>> is even shorter... (thanks Paul).
>>
>> Regards,
>> /Karl Hammar
>>
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>
>
>
> --
> with best regards,
>        Nazmul Alam Shovon
>
>
> *শুভেচ্ছান্তে,       নাজমুল আলম শোভন*
>
> blog : https://yourdigitaleffects.wordpress.com/
>
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