How do I use tinyusb on STM32 with a bootloader (application offset)?

[skygreenslade]

I have been using TinyUSB for my project for a while with no problem. I am using an STM32H563, and GCC.

I recently decided to use a bootloader to load my application, so the application starts at 0x0800 8000 instead of 0x0800 0000. Since this change, whenever I plug in a USB cable, my program hard faults. Reverting back to having the application at 0x0800 0000 fixes the problem.

Is there some configuration that I'm missing to accommodate for moving the FLASH region?

More details:

I am using my device as a USB device

I am using FreeRTOS

The hard fault occurs in tusb_types.h at tu_edpt_packet_size().

Call stack:
(FreeRTOS process)
tud_task
tud_task_ext
process_control_request
process_set_config
cdcd_open
usbd_edpt_open
tu_edpt_validate
tu_edpt_packet_size

I have tried adjusting the STM32H563xx_FLASH.ld file in hw/bsp/stm32h5/linker to match my FLASH and isr_vector offsets. This did not change the result.

Any insight is appreciated!

[skygreenslade]

It turns out there was a strange interaction with the ICACHE and MPU on the STM32 H5 I am using. This is more of an ST issue, but in case anyone else comes across this problem, look into how the ICACHE and MPU interact.