st link v2 red led is on

[osman2]

Hello
The LED on the top link is red. Is it a problem with the connection or the driver? I can't figure it out. Can you help me?

[Andrew Neil]

Please see this for how to capture a screenshot - far better than photographing the screen!

https://www.techrepublic.com/article/how-to-take-screenshots-in-windows-10/

The pop-up message is telling you that it can't detect any connected STM32 target device:

The log shows you that the target supply voltage is only 0.46V

Your Target can't be running with less than half a volt supply!

You need to fix the power supply on the target.

Note that the ST-Link/V2 does not supply power to the target.

[Andrew Neil]

The meaning of the LED is described in the User Manual:

https://www.st.com/resource/en/user_manual/um1075-stlinkv2-incircuit-debuggerprogrammer-for-stm8-and-stm32-stmicroelectronics.pdf#page=15

So the PC is communicating with the ST-Link, but the ST-Link has not yet had any communication - successful or otherwise - with the Target.

As described in my previous post, your ST-Link can't communicate with your Target because the Target has no power.

The ST-Link can't distinguish this condition from simply having no target connected at all.

[osman2]

I know how to take a screenshot but the computer I took it on didn't have internet so I took it with my phone

Should I connect another device to the st-link instead of the computer's usb port?
Thank you for your interest

[osman2]

I apologize, but I plugged it into other ports, but for some reason the voltage does not increase and stays at 0.46

[Andrew Neil]

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@osman2 wrote:

I plugged it into other ports, but for some reason the voltage does not increase and stays at 0.46

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Again, the ST-Link does not supply power to the Target.

Your screenshot shows that the PC is communicating fine with the ST-Link;  there is no problem there - no need to try different USB ports.

The problem is that your Target is not powered.

How are you trying to power the Target?

What Target is it?

[osman2]

dear andrew
no cable is currently connected to the st link- cn3 socket

[Tesla DeLorean]

You don't have anything connecting to Pin 1 which should be the VTarget voltage to power the interface buffers on the ST-LINK side

[osman2]

Do I need to give 3.3v from pin1 of the cn3 socket?

[Andrew Neil]

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@osman2 wrote:

no cable is currently connected to the st link- cn3 socket

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That's where you would connect the cable from the ST-Link to you Target.

If you have nothing connected there then, clearly, the ST-Link will not see any Target connected!

In this situation, the Red LED illuminated is the expected condition - as explained earlier.

Have you studied the User Manual?