I am using the MIMXRT1060-EVK with the matching XpressoSDK.
I created a project based on the freertos_hello example and added code from the semc to initialize the sdram interface.
I also enabled static allocation support for FreeRTOS to allocate the TCB and stack on the external SDRAM.
When vTaskStartScheduler(); gets called the created Task gets never executed but the processor is stuck in the DefaultISR handler. The callstack indicated that the XBAR1_IRQ_2_3 was called.
That doesn't make sense to me because the example code should not have initialized the XBAR module in any way.
If I place the heap in the m_data2 region (internal RAM) everything works fine.
I attached the relevant source files and the linker file.
Maybe i missed something about the initalization or propper usage of the external SDRAM.
I think i managed to reproduce the Problem as an MCUXpressoIDE Project.
My program is still stuck after calling vTaskStartScheduler();
The call stack seems to be quite similar
The difference is that i am now stuck with an MemoryManageFault
If i place the heap in the SRAM_OC2 region the program works fine.
I included the complete Project in the zip File
Hi,
Thanks for your reply.
Firstly, the demo runs well on my board actually, next, I still like to suggest you use the DCD mechanism to initialize the SDRAM.
Have a great day,
TIC
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