STM32G030K6 usart bootloader

[KlemenDS]

Hi,

I have a custom board with STM32G030K6 and I wish to use the buildin usart bootlaoder. I have checked the AN3155 and AN2606, but I still cant figure out how to enter into the bootloader. 

I found that for my MCU, I need Pattern 11 to activate bootloader, which means:

But after searching whole datasheet of the mcu, only boot bit setting I found was PA14-BOOT0 and there is no other boot bits to set up in cubemx.

I have a feeling that there is some info or application note that I am missing. Any help would be really aprpeciated.

[STTwo-32 · Accepted solution]

Hello @KlemenDS and welcome to the ST Community :smiling_face_with_smiling_eyes:.

You can find details about boot pin and boot bits on the part 2.5 of the RM0454:

Those boot pins can be configured throw CubeProgrammer (under option bytes->User Configuration):

Best Regards

STTwo-32

[KlemenDS]

Thank you very much for accurate and fast answer.

[KlemenDS]

Hi @STTwo-32  ,

I have one more issue. I configured boot pins to enter bootloader at startup of system, but now how do I check if the chip is actually in bootlaoder mode?

I know that the main application code on flash memory is not loaded at start up (mcu not responding to uart comamdns as it does in application code), but when I try to use commands from AN3155:

I get no response on uart (trying "Get version" and "Get ID" commands). The system is connected by STM32G03 connected to FT234XD-T(chip on PCB) and then via USB to PC. The UART communication work without problem in applciation code mode, at 115200 baud.

[STTwo-32]

This is a new issue. Could you please open a new post for that. So our Community members may help you.

Best Regards.

STTwo-32