STLink detection issue with STM32F417IGH6 chip

[shashank vaidya]

Posted on September 21, 2017 at 15:20

I am using STM32F417IGH6 chip with ST-LINk V2, but ST-link is not detecting in the STM32 ST-Link utility software to program the ST. What all I should look into Hardware wise. I have checked the power, reset, everything looks fine. I am connecting the following signals in ST-LINK V2 to STM32

reset, 

gnd

swdio

swclk. 

[Tesla DeLorean]

Posted on September 22, 2017 at 01:10

External ST-LINK requires pin 1 to connect to your 3.0-3.3V supply (ie VTarget)

Chip orientation

Voltage on VDDA

Voltage on VCAP pins

State of NRST pin

Do you have a schematic? Everything being 'fine' doesn't get me closer to understanding what is 'wrong'...

Diagram trumps Prose

[shashank vaidya]

Posted on September 22, 2017 at 14:16

Hi, Thank you for the reply.

I checked the points mentioned by you. It is fine and while debugging, I found that, the SWDIO pin is LOW in non-working board and HIGH in working board when the board is powered ON. The board in which it is HIGH is connecting to ST LINK and where it is LOW, it is not connecting. Is this a problem? What is the default condition of SWDIO pin?  Any other process to make this work? Please help.  

[Tesla DeLorean]

Posted on September 22, 2017 at 15:10

>>

Any other process to make this work?

Saying some is 'fine' is unhelpful. Specifically what voltages do you see on the VCAP pins.

A device that is unpowered will be unresponsive. Focus on that, and the quality of your soldering, etc. Check for shorts/opens, check current consumption.

There isn't some wand waving exercise I can perform to make this work. If there are board manufacturing issues, or with components you will need to track those things down. As you have boards that work vs ones that don't focus on what differentiates them.

[shashank vaidya]

Posted on September 22, 2017 at 15:24

Hi,

I forgot to mention that, these boards were in working condition, before

we faced such issue.

Anyway I shall look into the things which you have mentioned.

[Vangelis Fortounas]

Posted on September 22, 2017 at 14:45

Hello.

Take a look to this previous

https://community.st.com/0D50X00009XkYpiSAF

similar like yours.