Application not starting correct after UART bootloader

Hi,

I´ve a application (with RTOS) where I do a FW update via the internal UART bootloader (BOOT0 pin method).

After flashing is finished I set the Boot0 to GND and toggle the reset pin. The application starts, but I don´t get USART interrupts any more.

After Power cycle interrupts are working again.

Any idea?

Best regards,

Achim

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Technical Moderator

Hello,

Are you sure the UART interrupts are enabled in your application?

If you upload the application with ST link, do you have the same behavior?

Graduate II

Double check the NVIC and SystemInit() configuration of SCB->VTOR

Check the USART isn't flagging any other errors/status

Use USART in polling mode to output diagnostic/telemetry data, perhaps dumping RCC, USART, NVIC etc so you can note differences between cases.

Instrument Error_Handler / HardFault_Handler in case it ends up in either of those.

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