STM32F0: Using bootloader through USB-UART.

yuriyanyuriyan · ‎2015-07-06

Posted on July 06, 2015 at 17:30

Hello everyone.

At my device I have to make an opputunity to load a firmware through UART interface. I know, that it's possible to do using just USB-UART converter. At the F1 series for this purpose I should set the BOOT0 and BOOT1 pins, but I don't have those at my STM32F0 uC.

In that case, I want to ask the community: how can I organise all of the processes of loading firmware through USB at my controller? If it's possible, provide me please some code examples and schematics. I use STM32F0DISCOVERY board for development, in future I will have only the same controller, as installed at the board.

I look forward for your answers.

#stm32 #usb #uart #usart #stm32f0

Tesla DeLorean · ‎2015-07-06

Posted on July 06, 2015 at 20:20

Ok, so which part specifically are you using that doesn't have a BOOT[0] pin?

Would suggest you review the documentation for the STM32 System Loader, and USART protocol. Also look at the Flash Loader Demonstrator, with source, and other Open Source equivalents.

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yuriyanyuriyan · ‎2015-07-07

Posted on July 07, 2015 at 09:17

Sorry, I made a mistake.

I mean, I have only BOOT0 pin at the uC.

Amel NASRI · ‎2015-07-07

Posted on July 07, 2015 at 11:21

Hi n.yuriy,

BOOT1 isn't a pin but a bit that you may update using the option bytes.

With the STLink Utility, you can update the value of ''nBoot1''. WHen nBOOT1 is checked and BOOT0=1, you will boot from System Memory.

-Mayla-

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yuriyanyuriyan · ‎2015-07-07

Posted on July 07, 2015 at 13:41

Dear Mayla, thank you very much for your answer. I'll try to use it.