I did my own board with STM32F429IGT6, and connect the ST-Link v3 using the ST-Link Utility. "No target detected". Previously I had made my own boards, and the minimum connection is Vcaps to 2.2uF capacitors, nRst with 10k pull-up, and Boot to ground.The boards worked fine. The device is not detected by the programmer. Already checked supply voltages and grounds. Also SWDIO and SWCLK wires.

PIN 124  (TMS_SWDIO) -> PA13
PIN 137  (TCK_SWCLK) -> PA14

enter image description here

  • \$\begingroup\$ Do you connect all 4 pins of the SWD to ST-Link? \$\endgroup\$ – Justme Sep 25 '19 at 4:02
  • \$\begingroup\$ Yes, everything connected properly. Guess I gotta stop buying stm32f4 from China... \$\endgroup\$ – j.p.mateos Sep 25 '19 at 4:05

The BYPASS pin should be low to to enable internal regulator. Now it is high and disables internal regulator.

  • \$\begingroup\$ You are right, that is the error. Thank you \$\endgroup\$ – j.p.mateos Sep 25 '19 at 5:34

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.