Application crashing when going from bootloader to application after UART

[Chandan Bhatia1]

Hi, I am writing my bootloader, I changed MSP and reset handler value correctly so code is able to got application mode.

In my application I changed VTOR value as below but still my application is getting stuck post sending data to UART.

I am using STM workbench IDE so when I try to debug application code, its erasing bootloader code so I am unable to check exact reason of failure. Any suggestion as code looks fine to me.

[Tesla DeLorean]

Get a better debugger..

​

Instrument code to give flow and register info, use the SWV​.

​

Use UART in polled mode.

Determine where it "crashes", instrument Error_Handler and HardFault_Handler to see if it dies in those functions. Perhaps Default_Handler also.​

[Chandan Bhatia1]

Yes I am using uart polled mode HAL_UART_Transmit , not HAL_UART_Transmit_IT.

Btw Did u find anything wrong in shared code images?

[Chandan Bhatia1]

@Community member​ which debugger u use ? Also seems like issue is bit different. I started sending count 1 byte in while loop. Don't know why after sending 5 times, application code is getting crashed.

Also same result with polled mode and interrupt mode.