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when trying to connect with the serial port this is the message I got and the uart connection is completely lost and is there any possibility to reestablish the connection?

Nmv1608
Associate II

11:17:48:304 : Serial Port COM8 is successfully opened.

11:17:48:304 : Port configuration: parity = even, baudrate = 9600, data-bit = 8, stop-bit = 1.0, flow-control = off

11:17:48:304 : No Init bits value is : 0 

11:17:48:304 : Sending init command: 

11:17:48:304 : byte 0x7F sent successfully to target

11:17:49:304 : Wait ends after 1 loop, dataready = 0, delay = 1000

11:17:49:305 : Timeout error occured while waiting for acknowledgement.

11:17:49:305 : No response from target received

11:17:49:306 : byte 0x7F sent successfully to target

11:17:49:404 : Wait ends after 1 loop, dataready = 0, delay = 100

11:17:49:405 : Timeout error occured while waiting for acknowledgement.

11:17:49:406 : No response from target received

11:17:49:406 : Error: Activating device: KO. Please, verify the boot mode configuration and check the serial port configuration. Reset your device then try again...

4 REPLIES 4
Imen.D
ST Employee

Hello @Nmv1608​ ,

Which STM32CubeProgrammer version are using ? If you are using an old version, please try to use the latest version V 2.3.0.

Then, please let us know if the issue still exist with the last version.

Best Regards,

Imen

When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen
Nmv1608
Associate II

I tried it with the latest version of STM32CubeProgrammer version 2.3.0, but the problem still exists. Looks like the uart is blocked.

Imen.D
ST Employee

Please check the board user manual and AN2606 to verify the connection of connector to the UART bootloader.

When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen
Ozone
Lead

Is the target really in system bootloader mode ?

Are the connections to the target correct ? Check up to the MCU pin.

It is common to need several tries to establish connection.