Inspection of K66 ROM with IAR EWARM

Question

I am currently using IAR EWARM 9.10 to develop an application for Kinetis K66. I am in the process of debugging a hard fault and I noticed that when I inspected certain locations - using EWARM's memory view - in the K66 Flash, the contents were reported as double dashes ('--'). How should I be interpreting this?

Example attached...

Answer 1

The dashes (-) in the Memory visualization window means unmapped memory.

In a Kinetis device where the installed Flash memory ends at 0x000FFFFF, the "Memory 1" window shows up like this on the end of the region:

For the Kinetis devices, the flash memory available for the user's code is discontiguous and within 0x0000_0000~0x0000_03FF | 0x0000_0410~END_OF_FLASH.

This is due a "flash configuration" region (0x0000_0400~0x0000_040F) reserved for the FlashConfig section.

For a similar device, using IAR EWARM 9.30: