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Hi,
I am using the MIMXRT1050-EVK Board which uses the ARM-Cortex M7 processor on Keilv5 Professional version. I am trying to create a ram test and then move code from the flash to external ram for execution. I am using the MDK Hello World example as a base for my project. I have tried to run a simple RAM test by copying over data to an external RAM address and reading it, but the program just hangs. My questions are:
1. What do I need to do in the flash settings to use the external RAM?
2. Do I need to edit the startup file to use external RAM?
3. Are there any external RAM testing example projects using the same board?
4. How can I move code from the flash to external RAM for execution?
5. I have tried to assign a source file to the RAM space using the Memory Assignment in the file properties, but the code still runs in flash. How can I assign code to be saved and executed from external ram using the memory assignment settings?
I have tried to follow other examples of external RAM tests but have not gotten anything to work. Any help is appreciated.
-Kamal
Perhaps look for *.ini files under the Keil directory trees.
The process is involved because you must directly poke a lot of registers using the _WDWORD() function.
C:\Keil527pre\ARM\Flash\_Template\Test\RAM.ini
Step 1 would be for you to refactor the C code doing the External RAM configuration into a sequence of 32-bit memory writes into the clock and memory interface register.
Step 2 test that code
Step 3 translate to the equivalent sequence in the debugger script
It is a complex and tedious process, and will require an understanding of the MINXRT1050, the chip, the board, the external memory, etc. Not something I'd touch in an unpaid capacity, and without a board.