IAR "download and debug" reset registers ?

[ranran]

Hello,

I am using a Bootloader which jump to operational application.

the Bootloader configures SRAM, so that operational does not need to do it again.

Bootloader is baremetal , and operational is freeRTOS.

I use IAR.

Everything works well if I reset the board, and "Attach debugger to running application".

But If I try to: reset board and debug&download the operational application it hangs. It seems that the problem is that on debug&downloading the application all FMC register are set to zeros.

But I don't understand who is responsible for setting registers to zero. where in IAR did I configure such reset of registers ?

 I did not find anything in IAR debugger configuration which explains me this reset of registers values (which were set in bootloader).

Thanks for any idea,

ranran

[Tesla DeLorean · Accepted solution]

The debugger is entirely short circuiting the boot loader operation, and places the start of execution at the front of the app. The debugger likely resets the processor as a means to gain control, it doesn't know you've created external dependencies.

The app could detect this, and execute some code to bring up the FMC properly, perhaps via a clean entry point function in the loader if you don't want to replicate the code, or you could code a debugger script file to poke the registers