Not able to dump the program to STM32l151VCT6A IC through STM32 ST-link utility tool.

Rac · ‎2018-01-28

Posted on January 29, 2018 at 07:27

We are using STM32L151VCT6A-ND IC in devices; where I observed that in some of the ICs pin PA13 (JTMS-SWDIO) is low and not able to detect the MCU. Could anyone please help me to solve this issue.

Bogdan Golab · ‎2018-01-29

Posted on January 29, 2018 at 11:45

To enable this pin you can follow this thread:

https://community.st.com/0D50X00009XkY4CSAV

Rac · ‎2018-01-30

Posted on January 30, 2018 at 11:05

I was not able to connect to the ST-Link; 'No target connected' Error message is displaying.

Pin PA13 (JTMS-SWDIO) is low. Is it possible to make it pull-high?

Even I have tried making pin PA13 pull-up externally..

Bogdan Golab · ‎2018-01-30

Posted on January 30, 2018 at 11:10

Have you tried to enter DFU - I mean embedded bootloader firmware where the SWD pin is enabled?

Rac · ‎2018-02-01

Posted on February 02, 2018 at 05:22

Yes, Tried to upgrade firmware; but it failed.

By default itself SWD pin is low ( might be disabled)

Bogdan Golab · ‎2018-02-01

Posted on February 02, 2018 at 07:26

Is this custom board? Was it working before? Is the ST-link works with another board? Cable replaced?

The link above assumed that the problem is wrongly programmed MCU (prohibited certain pins) - it happens often when you generate code through CubeMX.

Rac · ‎2018-02-05

Posted on February 05, 2018 at 10:13

No, it was not working before. Changed the cable and checked.

With the same design we have done almost 150 boards in that nearly 20 boards(MCU) are not working.

ST-link works for other boards.