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ST_LINK V2 Not detecting Target

Question asked by Pas Kol on Dec 26, 2017
Latest reply on Dec 31, 2017 by Kenta Chang

So I made a custom STM32F446RET6 board and I first used a mini ST_LINK programmer to connect to the MCU. I was able to program it but couldn’t debug it since the mini ST_LINK programmer doesn't have the SWO pin. I used STM32 ST-LINK Utility and Keil to program the chip.


Mini ST_LINK V2 programmer


I then purchased the ST_LINK V2 programmer from ST but it doesn’t connect to the MCU (target). My laptop does recognise the ST_LINK V2 programmer since I have the stsw-LINK009 software installed. The SWCLK. SWDIO, and SWO pins are directly connected to the male headers as seen in the pictures.


Here are the Connections:

Connections to ST_LINK V2 Debugger

Connection from ST_LINK Debugger to custom board


I also attached the trace.log file from STM32 Utility: 

Any ideas as to why this is happening?