the windows computer recognized the st-link v2 as universal serial bus instead virtual port

[kevin1971]

Hi.

After firmware upgrade for st-link v2, windows computer recognized the st-link as universal serial bus instead of virtual com port. whenever i try to program to MCU, there is error like a "No target device found".

How can I solve it?

Below image is the device manager to be recognized as Universal serial bus. there is no PORT.

 

 

Thank advance.

BR

 

[Peter BENSCH]

Welcome @kevin1971, to the community!

Which software and settings did you use for the firmware upgrade?
Can you please also upload a photo of your ST-LINK/V2 here?

Regards
/Peter

[kevin1971]

Hi.

Below is the image which I have used.

[AScha.3]

try with stm32CubeProgrammer . (st-link utility is outdated.)

[kevin1971]

Hi.

I tried to program in the cubeISE using above st-link v2, the error message is "no target device found".

In this regard, if i use the stm32CubeProgrammer, will it work to program?

 

Thank you.

BR

 

[Peter BENSCH]

You have used the ST-LINK utility, which is long out of date and on NRND (Not Recommended for New Designs). The firmware is also outdated and should be updated with STM32CubeProg.

Regards
/Peter

[kevin1971]

Hi

 

Below is the upgrade using CubeProgrammer after install it.

 

However,

If i tried to program with connect, below is error message which i got.

 

 

Thank advance

BR

 

[AScha.3]

so st-link working now. ok.

but target shows 0 V only - now power on target ! (or you didnt connect VDD ( 3,3V )to st-link .

connect 3,3 V to target !

[Tesla DeLorean]

Show how this is connected to your target. Needs VCC, GND, SWDIO, SWCLK minimum.

This type of ST-LINK/V2 does NOT provide a COM Port / VCP

[kevin1971]

Powre is up with 3.07V. however, no stm32 target found as below image.

My SWIO, SWCLK, VDD, RST as below schematic. 

VDD : 1

SWIO : 7

SWCLK : 9

RESET : 15

GND : 4

 

 

 

 

 

Thanks in advance.

Regards

 

[Tesla DeLorean]

Ok, but the diode suggests that you expect the ST-LINK to power the 3.3V whereas the expectations for the buffers is that your target powers them. Check the voltage you see on pin 1/2 of the 20-pin header

[kevin1971]

Hi Tesla,

You mean that the target board should provide the power 3.3V to the st-link VDD pin 1/2 of the 20-pin header.

or,Is 3.07V little bit low voltage for flashing?

 

Thanks

Regards,

[kevin1971]

Hi 

After measuring the voltage of 1/2 of 20-pin header with tester,  the value of voltage is 3.13V.

Thank you.

Regards,

[kevin1971]

Hi,

MCU is STM32L072CZ.

Boot0 is to wired with GND. Now Voltage is 3.25V for VDD : 3.25V, SWDIO, SWCLK, nRST, RST.

Even if I tried to connect with My MCU Board which housed STM32L072CZ, it didn't connect with them.

Please help me.

 

thank you in advance.

Kevin