Re: Dragino LSN50 and STLink

Kumar Gala

Adding 2 people who might be able to help.

- k

On May 7, 2019, at 1:29 PM, Gustavo FN <gustavofn@...> wrote:

Hello everyone,

I noticed the Dragino LSN50 board has been ported to Zephyr and that's pretty cool.

I have one of this board and following the page they say 'Connect the Dragino LSN50 to a STLinkV2...'.

Since the the board has no dedicated connect to JTAG/SWD, I read the stm32l072cz datasheet and found out the the SWDIO is PA13 and SWCLK is PA14.

I connected these pins at my J-Link Ultra in the following way:
pin 6 -> pin GND
pin 7 -> pin PA13 (SWDIO)
pin 9 -> pin PA14
pin 19 -> pin VDD (+3.3V)

And tried to connect the Ozone but it did not work. At Ozone, in J-Link Settings I have the target device: STM32L072CZ, Target Interface: SWD:auto speed and Host Interface: USB.

If someone knows how to connect the LSN50 board and could explain me I'll be very grateful.

All the best,

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