I currently have an application using MQXv5 on a custom K66-based board that executes just fine unless I relocate the code from a base of 0x0000 to a base of 0xF000 (to accommodate a bootloader) and then jump to the application entry point (__boot) from the bootloader.
I am using IAR EWARM 9.10 as my IDE.
When jumping to the code from the bootloader, the application raises a hard fault early in the initialization process.
More specifically, a hard fault is raised in __iar_data_init3 due to a data access error.
The Bus Fault Address Register - BFAR - indicates an address of 0x3b10e
The Vector Table Offset Register - VTOR - indicates an address of 0x1fff0000
From the linker map file for my application:
"P1", part 2 of 2: 0x136
Initializer bytes const 0x3'b001 0x10d <for P3 mid-1>
Initializer bytes const 0x3'b10e 0x26 <for rw section .vectors_ram-1>
Initializer bytes const 0x3'b134 0x3 <for KERNEL_DATA-1>
- 0x3'b137 0x136
"A1": 0x400
rw section .vectors_ram-1
0x1fff'0000 0x400 <Init block>
.vectors_ram inited 0x1fff'0000 0x400 vectors.o [4]
- 0x1fff'0400 0x400
My linker file is attached.
Any idea what might be causing the data access error when running the app from the bootloader or what I might do next to further debug the issue?
Thank you.
