Hi,
I'm experiencing a weird difference between an SDK demo project and a new C++ project.
First experiment:
I created an iled_blinky demo, and set the preprocessor symbols:
XIP_BOOT_HEADER_DCD_ENABLE=1
SKIP_SYSCLK_INIT
At the first breakpoint, i.e. at the start of main(), I used the MCUXpresso memory viewer to look at 0x80000000.
I can read and write at will.
I created a New C/C++ Project - the only setting I changed was to select C++ Project. All the other settings I left as default (i.e. semihost, baremetal etc).
When the project was created I set the preprocessor symbols:
XIP_BOOT_HEADER_DCD_ENABLE=1
SKIP_SYSCLK_INIT
At the first breakpoint, i.e. at the start of main(), I used the MCUXpresso memory viewer to look at 0x80000000.
It is all zero. When I write to it, the values are immediately reset back to zero.
Second experiment:
In both projects, I moved BOARD_SDRAM up to second place just below BOARD_FLASH (in MCU Settings), so that all the data would be in SDRAM, just the code in flash.
When I run the iled_blinky demo, it runs fine.
When I run the C++ project I get a hard fault in SystemInit (near call to SystemInitHook). See attached image.
So why do the iled_blinky demo and the C++ project behave differently?
Many thanks.
RT1020-EVK
MCUXpresso IDE v11.1.0 [Build 3209] [2019-12-12]
SDK version 2.7.0
Windows 10
Hi Ronnie,
I am sorry for the late reply. I have been testing these issues on my side.
I have been able to replicate both experiments you reported. The solution for me was the following please give it a try:
Using this configuration the behavior was the same as the iled_blinky demo.
Hope it helps!
Best regards,
Felipe
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