Re: [OpenOCD-user] Flashing STM32f1 with Segger JLink problems

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

Sorry, forgot to mention that removing connect_assert_srst makes the
connection succeed.

Leonardo

On Sun, Apr 2, 2017 at 2:10 PM, Leonardo Sabino dos Santos <
leo...@gm...> wrote:

> Hello Paul,
>
> Sorry for hijacking this thread, but I ran into this exact situation a
> while ago and hopefully you can give me some pointers.
>
> On Sun, Apr 2, 2017 at 9:53 AM, Paul Fertser <fer...@gm...> wrote:
>
>>
>> Some target firmware might require you to connect under reset or to
>> connect while the target stays in the bootloader. For the former, you
>> need to connect hardware SRST line between the adapter and the target
>> and add -c "reset_config srst_only connect_assert_srst" before -c
>> "program..." parameter. For the latter, just pull the BOOTx pins
>> accordingly externally with jumpers.
>>
>
> The smaller STM32L0 parts have what's called empty device detection (if
> Flash is empty, run the factory bootloader regardless of BOOT0 pin state).
> On the lowest pin-count package (TSSOP14) the bootloader firmware
> *apparently* reconfigures the SW debug lines to an alternate function, so
> the options are connect under reset or not at all.
>
> I've generally had trouble connecting under reset without using "hacks".
> One trick that has worked is holding the reset button and releasing it just
> as OpenOCD executes the reset halt command. Using connect_assert_srst
> causes a timeout during reset halt (I've seen this in different STM32
> parts).
>
> Attached part of a -d3 output below. The MCU is an STM32F103 (it's what I
> have on the bench right now) using OpenOCD 0.10.0 with an inexpensive
> cmsisdap adapter.
>
> Any suggestions of possible causes / things to try?
>
> Regards,
>
> Leonardo
>
>
> --------------------------------------------------------------------------
>
> .....
>
> Debug: 757 516 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing 2
> queued transactions
> Debug: 758 516 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP write reg
> 4 e0001058
> Debug: 759 517 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP write reg
> c 0
> Debug: 760 519 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing 0
> queued transactions
> Debug: 761 519 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing 5
> queued transactions
> Debug: 762 519 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP write reg
> 0 a2000002
> Debug: 763 520 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP write reg
> 4 e000edf0
> Debug: 764 520 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP write reg
> 8 10
> Debug: 765 520 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP read reg
> 0 0
> Debug: 766 521 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP read reg
> c 0
> Debug: 767 523 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read result:
> 1010001
> Debug: 768 523 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read result:
> 1010001
> Debug: 769 523 target.c:2802 target_wait_state(): waiting for target
> halted...
> Debug: 770 524 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing 2
> queued transactions
> Debug: 771 524 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP read reg
> 0 0
> Debug: 772 524 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP read reg
> c 0
> Debug: 773 526 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read result:
> 1010001
> Debug: 774 528 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read result:
> 1010001
>
> ...... [the last 5 lines above repeated many times] .....
>
> Debug: 2312 1521 cmsis_dap_usb.c:599 cmsis_dap_swd_run_queue(): Executing
> 2 queued transactions
> Debug: 2313 1521 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): AP read
> reg 0 0
> Debug: 2314 1521 cmsis_dap_usb.c:622 cmsis_dap_swd_run_queue(): DP read
> reg c 0
> Debug: 2315 1524 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read
> result: 1010001
> Debug: 2316 1524 cmsis_dap_usb.c:677 cmsis_dap_swd_run_queue(): Read
> result: 1010001
> Error: 2317 1524 target.c:2810 target_wait_state(): timed out while
> waiting for target halted
> Debug: 2318 1524 command.c:143 script_debug(): command - ocd_command
> ocd_command type ocd_stm32f0.cpu curstate
> Debug: 2319 1524 command.c:143 script_debug(): command - ocd_stm32f0.cpu
> ocd_stm32f0.cpu curstate
> User : 2320 1525 command.c:544 command_print(): TARGET: stm32f0.cpu - Not
> halted
>
> .....
>