How to program WIO-5E mini (Seeed) using ST-LINK/V2 mini (Vaweshare)

[markpow]

I bought ST-LINK/V2 from a certified reseller, and I have WIO-5E mini with STM32WL5JC from [Seeed.com](https://Seeed.com) on the board. This WIO-5E was already programmed by another ST-LINK/V2. I connected WIO-5E to ST-LINK as required. I want to reprogam WIO-5MINI using this programator. But STM32Programmer answered:

What should I do so STM32Programmer will see STM32WL5CJ from the WIO-5E mini board?

[Tesla DeLorean]

How is this connected? Like before?

VCC 3.3V

GND

SWDIO

SWCLK

NRST

If NRST is connected then "connect under reset" will work without you needing to press a button.

[markpow]

I have only four wires: VCC 3,3V, SWDIO, SWCLK, and GND on ST-LINK/V2. They all are connected as required to the WIO-5E mini. I don't have NRST wire.

[markpow]

I can't.

What should I do to upgrade the firmware?

[markpow]

@Peter BENSCH​ 

I upgraded the firmware with a stupid trick. I unplug the USB cable from ST-LINK, count for up to 6 sec, plug the USB into it, count again for up to 6 sec, and press on upgrade firmware button.

Firmware upgraded to the requested version.

But still can't connect to the WIO-5E mini. Still the same message:

Error: No STM32 target found!

I can connect to WIO-5E only when pressing and holding the reset button. When I release this button, I get:

18:30:50 : Error: Unable to get core ID

 18:30:50 : Error: Unable to get core ID

 18:30:50 : Error: Unable to get core ID

 18:30:50 : Warning: Connection to device 0x497 is lost

 18:30:51 : Disconnected from device.

Maybe this information will be helpful. Previously downloaded code into WIO-5E sill running, red diode blinks every one second. When I press the reset button, the diode stops blinking.

[AScha.3]

>I upgraded the firmware with a stupid trick

No. thats what you should do, to "start in update mode " .

> Previously downloaded code into WIO-5E sill running,

AAA, new info. It was working before ??

so just look, what you set in option bytes. there is something , that disables SWD , i suppose.

or in your program -> using the SWD+SWC pins for something, change their mode;

+ you set in Cube : SWD ?

[markpow]

@AScha.3​ ​ Here is my view:

It looks completely different from your's view.

But I can't understand the relation between the configuration of an application and trying to connect ST-LINK to WIO-5E mini (with STM32WL5JC chip on the board)

[AScha.3]

ok, (pic was from F072 cpu) , on your WL5x cpu the relevant pins can be set to different functions, if you want SWD debug connect, you must set PA13 + PA14 to SWD+SWC function. otherwise they will do, whatever is set to them.

if you just want flash/load program, maybe you should try bootloader mode and flash this way.

[AScha.3]

so - what you did ? already killed the firmware ?

[markpow]

Yes, the firmware was cleared, and the protecion level was set up to AA. After that, I might upload code (.hex) to WIO-5 min. In the beginning, I would ask the chip using AT commands. After clearing the firmware, it's obvious that I can't ask with AT command. But I might program this chip. I saw that WIO-5 contacts to Chirpstack gateway.

[AScha.3]

so...i hope, you know, what you are doing. 🙂

• in CubeProgrammer, set software reset
• connect (under reset - press reset button, then 'connect') . works ? can load program ?
• or try bootloader: press reset, press boot, release reset , then release boot. now should connect in bootloader, select in Cubeprogrammer not STlink, but rs232 or usb - whatever your chip can do (read manual!) and for rs232 need ie rs232 - ttl adapter to connect to rs232 rx-tx on chip pins.

maybe, you have to set option bytes , or set swd on start of your program, to have it always available (to connect by STlink -> SWD ) and debug or load program.