flash sharing of bootloader and app

[name]

I open up a flash shared space in app and bootloader, write values from app, bootloader read, bootloader read values such as 0xFFFFF, and not ideal values, may I ask why this is.

Based on the background of this problem, I want to customize the protocol OTA without any verification. I have correctly transferred the firmware data to bank1 through flash, and I want to modify s_dfu_setting myself to make the bootloader know that the firmware is valid and can be updated.

[Vidar Berg]

Hello,

The bootloader will feed the watchdog if it sees that it is enabled by the application prior to entering dfu mode, but it will not enable it. Can you please a breakpoint in the bootloader's error handler to see if the error may have been triggered by a runtime error?

[name]

Hello, I tried extending the watchdog timer in the app, but it didn't solve the problem. I tried setting breakpoints in Keil, but when the debugger jumped to the bootloader, it disconnected. I wonder if there's something wrong with my debugging method. I would like to ask how to set breakpoints for debugging in the bootloader, or if there are any tools or related documentation.

[Vidar Berg]

You can debug the bootloader the same way you debug your application. The difference is that you need to open the bootloader project in Keil instead. The application project does not include the debug symbols needed to debug the bootlaoder.