I create a PCB with stm32F411 and i obtain: "Can not connect to target" with st-LINK Utility

[bvale.2]

Hello,

For a project, I created a PCB with an STM32F411 using a 10pin JTAG port for SWD programming.I tried to connect my card using the ST LINK V2 box and the ST Link utility software but I get the following error:

The st link works because I can program another card using a stm32F042. I tried all the connection parameters and to play with the BOOT0 pin status but nothing works.

Can anyone help me to program my card?

[Tesla DeLorean]

So F4 in the circuit is non functional, focus on that and wiring to it.

Check part orientation.

Check voltage seen on VCAP pins, and placed caps.

Check VDDA

Check NRST​

[bvale.2]

I have already checked all this but it does not change anything. And I try with a second board and I have the same result.

[TDK]

Well check again, because something is wrong and most likely it's a hardware issue. How is the board powered?

The pinout you showed is correct.

[Tesla DeLorean]

>>The pinout you showed is correct.

For a debug header, but the chip needs to be functional to be responsive.Right now seems dead in the water unless any other signs of life can be determined.

The other secondary method is to probe one of the System Loader's UARTs responds to the 0x7F data pattern at 9600 8E1, in the BOOT0=HIGH cases.

Focus on causal reasons why chip is dead in the water...

[bvale.2]

I just rechecked I don't see any problem on the welds or anything else on the material.

My board is powered with stabilized power supply on 5V and on the board I have a converter on 3.3V.

[Tesla DeLorean]

Does the ST-LINK see a voltage? VTarget

What voltage do you see on VCAP?

Can you take a picture of the IC on the PCB? Points for clear, sharp and in focus.

[bvale.2]

I just rechecked I don't see any problem on the welds or anything else on the material.

My board is powered with stabilized power supply on 5V and on the board I have a converter on 3.3V.

[Tesla DeLorean]

Ok, but you're just repeating what you said 3 hours earlier.

We have zero visibility into this, assume your design is flawed. Have someone you work with do a walk thru of the design and data sheets with you.

Review the pin assignments, and net list.

[TDK]

Debugging remotely is a two way street. Tesla is asking you questions which will help find the problem, but if you ignore them we never get the ball rolling.

Does STM32CubeProgrammer work?

Posting the entire schematic instead of just the debug port pinout would also help. The pinout you show is correct but that doesn't mean the rest of the design is correct, or that those signals are connected to the correct pins on the chip.

[bvale.2]

>> The other secondary method is to probe one of the System Loader's UARTs responds to the 0x7F data pattern at 9600 8E1, in the BOOT0=HIGH cases.

Focus on causal reasons why chip is dead in the water...

Sorry, I don't understand how to do it?

>> Does the ST-LINK see a voltage? VTarget

Cube Programmer said Vtarget = 3.2V

 

>> Can you take a picture of the IC on the PCB? Points for clear, sharp and in focus.

Here is a part of my wiring diagram, the stm32 CubeIDE configuration and a picture of the board. Pin 1 is on the bottom right. BOOT0 is given to a 10k Ohm resistor for which I can choose to ground or 3.3V

 

[TDK]

You've grounded VCAP. That will cause the chip to not function. This pin outputs ~1.2V and needs to be bypassed to GND with a ~2.2uF cap.

 

Review the reference layout documentation.

https://www.st.com/resource/en/application_note/dm00115714-getting-started-with-stm32f4xxxx-mcu-hardware-development-stmicroelectronics.pdf

Tesla asked you about this in the very first post.

> Check voltage seen on VCAP pins, and placed caps.

Edit: Not only that, but you replied and said that you've checked it.

> I have already checked all this

[bvale.2]

Sorry I didn't see this feature in the documentation. I unsoldered this pin and soldered a 2.2uF capacitor as indicated. Now the card consumes much less and the value seems to me more coherent (10mA instead of 150mA).

I still can't connect to the board but I will read the documentation more carefully before coming back to you.

Thanks for your help