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+--- Thread: help running the bootloader using PIC24FJ [solved] (/showthread.php?tid=22)
help running the bootloader using PIC24FJ [solved] - tonycjc - 2010-12-03
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.
RE: help running the bootloader using PIC24FJ - Lotusx - 2010-12-04
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
RE: help running the bootloader using PIC24FJ - tonycjc - 2010-12-06
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.
RE: help running the bootloader using PIC24FJ - Mikael Gustavsson - 2010-12-08
You say that debugging doesn't work but you expect a breakpoint to be hit?
RE: help running the bootloader using PIC24FJ - tonycjc - 2010-12-08
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.
(2010-12-08, 22:50:29)Mikael Gustafsson Wrote: You say that debugging doesn't work but you expect a breakpoint to be hit?
RE: help running the bootloader using PIC24FJ - Mikael Gustavsson - 2010-12-09
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.