I want to use stm32 cube programmer uart mode

[lovedognosick]

I'm not good at english

 

I tried using stm32cube programmer uart mode.

but  "Error: Activating device: KO. Please, verify the boot mode configuration and check the serial port configuration. Reset your device then try again..."  returned

 

I'm using stm32mp135 custom board, so i read stm32mp135 datasheet and found this part

 

 I'm worried about USART3/6 and UART4/5/7/8 on "default pins"

I use uart4, but use another pin set.

uart4_TX -> PA9

uart4_RX -> PD8

 

Is the error related to this part?

 

[DBELL.1]

Hello,
 

Here is what i did to use the UART mode with STM32CubeProgrammer and a DK32MP135F:
- all boot pin at zero 

 

- connect USB PWR and USB STlink cables
- launch STM32CubeProgrammer (v2.17.0)

- choose the good UART port, there are 2 VCP COM (COM20 and COM21 in my case), select the second one (COM21 in my case), I got the same error message as you when I selected the wrong one
- click on connect
 

In this mode, the USART/UART settings is done by the boot code.

 

rgds,
David