Confused about ps7_init.h/.c

Hi,

I am confused about the purpose of the ps7_init.h/.c/.tcl files. Currently I am just using the hello_world example on Zedboard. I have successfully run this via JTAG, QSPI, and SD card without issues.

However, I see in the platform.c files that it indicates if I want to run this outside of the SDK I should #include ps7_init.h and call ps7_init() in init_platform().

However if I add the include and call ps7_init() it hangs indefinitely during the DDR initialization.

My questions are:
1. What does it mean by running outside of the SDK? I have successfully run the standard hello_world w/o calling ps7_init from the SD card and QSPI, this seems to be outside the SDK.
2. When/why do I need to call ps7_init()? The hello_world example seems to run perfectly fine without it.
3. What's the relationship between ps7_init.tcl and ps7_init.h/.c?

0 Former Member over 9 years ago

Hello,

The ps7_init.tcl file is used to initialized the Zynq Processor System when you run your program 'within' the SDK using the JTAG interface. If you look at the 'run' or 'debug' configurations you will see an option to run ps7_init, which is the default.

If you boot your device from SD Card or QSPI Flash you would need to make sure that ps7_init.c is executed as part of that initialization. If you generated an FSBL using the SDK the ps7_init.c/h function would have been included there.

You would need to include and call ps7_init.c/h if you write your own FSBL.

-Gary
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0 Former Member over 9 years ago

Thank you. I see in the FSBL that I have made (just using the FSBL example in the SDK) that ps7_init() is one of the first functions called.

This indicates to me that I should not need to call it again in my bare metal application. But why then does the hello_world example say that I should uncomment it if I'm running from the SD/QSPI?
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0 Former Member over 9 years ago in reply to Former Member

All I see is a comment in the platform.c about ps7_init.h, not ps7_init.c. This is a question you would need to ask Xilinx, perhaps on one of their community forums.

-Gary
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