Impossible to start the Debugger

[Alessandro Fulignani]

Hi Mikroe,

We are starting a new project with an STM32L021D4. This STM micro it is available in your compatibility list.
You can download and write software, but as soon as you try to debug it, you get the message "ReadDHCSR Fail"

The mkrobasic version it is the latest available. 6.2.0 under W10 with last updates.

Connection SWD at 1Mhz under HW reset. Codegrip for ARM with the latest firmware.

The test software it's very simple:

While 1
nop
nop
wend

No library selected.

Hope to get a fast answer,

Regards,

Alex

[darko.ilijevski]

Hello,
Have you tried switching the connection back to "Normal" instead of "Under Reset"?
The "Under Reset" option is used to hold the MCU in the reset state while it is connected so the programming pins (SWD/JTAG) fall back to their default settings when forced by the firmware to GPIO mode.

[Alessandro Fulignani]

Dear Filip and Darko,

The Boot pin in my application was not connected properly so the prog counter was pointing to the wrong address.

Once connected the Boot Pin to ground, everything worked fine.

Really apologize to have wasted your time.

Thank you.

Alessandro