I am using a MIMXRT1170-EVK with MCUXpresso and a J-Link Ultra+ for programming/debugging. This was initially working perfectly with the default QSPI NOR Flash and a variety of the SDK demo applications.
I wanted to switch to Octal Flash, so I changed the resistor and DIP switch settings, but could not get applications to run from the octal flash. The fsl_romapi_cm7 demo app linked to run from RAM also reported an error trying to identify the flash. So, I changed the resistors and DIP switches back to the initial settings for QSPI flash.
On first power up after changing things back, the last demo application I had used with the QSPI flash booted and ran as expected. The fsl_romapi_cm7 demo app (run from RAM) also runs and completes successfully. However, now when I try to program and debug a demo app from the QSPI flash, it appears to get stuck in the NXP ROM bootloader. I have quadruple checked that the resistors are set correctly (and I can apparently read and program the flash successfully), and the DIP switches are set for Internal Boot from QSPI (all switches off except SW1-3).
If I click the "pause" button in MCUXpresso, it breaks with the PC register at 0x23104, which is somewhere in the bootloader ROM. If I dump memory I see the FCFB at 0x30000400 and the Program Vector table at 0x30001030. The program vector table has a program entrypoint of 0x300024e9, and the code at 0x300024e9 appears to be a valid entry point (ResetISR) for the demo app.
How should I go about troubleshooting this to determine why it isn't booting correctly?
Thank you,
Pete
