help running the bootloader using PIC24FJ [solved]

[tonycjc]

I followed the steps listed in the firmware manual and when I tried to run the bootloader, it keeps jumps back to address 0. I'm not very good in assembly language. I have included the assembly file. Any help would be appreciated. Thanks.

[Lotusx]

Hello,

Could you provide more infromation ; the PIC you're using, does the GUI find the bootloader, the code or the hex file you're loading.

Lotusx

[tonycjc]

I'm using Microchip PIC24FJ256GA110 microprocessor. I have not tried to run the GUI yet because I want to make sure the bootloader works. Essentially, I placed a breakpoint at the "bra usrapp" instruction that it never hit and always reset to address zero. Another strange thing is that I can't debug the assembly code, I can only see the program memory.

[Mikael Gustavsson]

You say that debugging doesn't work but you expect a breakpoint to be hit?

[tonycjc]

As far as I understand that when the bootloader starts and waits x seconds for the UI to communicate otherwise it will jump to the user application. Therefore, I placed a breakpoint at the usrapp: jump instruction and it never get there. instead, it resets to address zero.

You say that debugging doesn't work but you expect a breakpoint to be hit?

[Mikael Gustavsson]

Please try the bootloader for real and come back if you have any problems.
If you have problems with your debugger you might get help in the Microchip forums.