How should i use UART to download firm? the mcu is STM32F401VBH6,and i have sent the boot0=0. the download tool is stm32cube programmer.

Pwang.21 · ‎2021-02-28

Mike_ST · ‎2021-03-01

Hello,

I think that BOOT0 should be 1 to allow download with UART.

Pwang.21 · ‎2021-03-01

The booto now is 1,but it still show this error:

Mike_ST · ‎2021-03-01

What error ?

Pwang.21 · ‎2021-03-01

The below:

Tesla DeLorean · ‎2021-03-01

Has the chip/board been test and programmed via JTAG pins?

Which UARTS and pins do you have connected, and too what?

Are other devices connected that might be signalling on other pins?

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Mike_ST · ‎2021-03-01

Please check that you are following Application note 2606:

For STM32F401xB:

Pwang.21 · ‎2021-03-01

My configuration as below:

Boot0=1,boot1 not configure

USART1

8-bits, even parity and 1 Stop bit

could you help to confirm boot1=0 is necessary?

Mike_ST · ‎2021-03-01

This is what section 27.1 of AN2606 is saying: "The STM32F401xB(C) bootloader is activated by applying pattern1"

If I remember well, if boot1 is pulled to 1, the MCU boots from RAM.