TMS320F28388S: Running from FLASH & setting OSCCLKSRCSEL to non-zero value crashes CPU

Tim Cook

Part Number: TMS320F28388S
Other Parts Discussed in Thread: TMS320F28379D, TMS320F28388D, C2000WARE

Tool/software:

I have a project that runs from RAM on the TMS320F28379D & TMS320F28388D eval boards when using the XDS220 ISO debugger.

Trying the same project & updating the link.cmd for FLASH, project will not run. I crashes the DSP.

Specifically, the following code crashes the DSP.

ClkCfgRegs.CLKSRCCTL1.B.XTALOFF = 0; /* Turn on XTALOSC */
SYSCTRL_CLKSRCCTL1_DELAY;
ClkCfgRegs.CLKSRCCTL1.B.OSCCLKSRCSEL = 1; /* Clk Src = XTAL */

These lines are part of the CLK initialization process.

Any help would be greatly appreciated.

+1 Prarthan Bhatt over 1 year ago

Hi Tim,

Can you try using one of the c2000ware example and ran from flash.

What is the error message ? What do you mean by DSP crashes ?

Tim Cook said:
Trying the same project & updating the link.cmd for FLASH, project will not run. I crashes the DSP.

Thanks

0 Tim Cook over 1 year ago in reply to Prarthan Bhatt

There's an InitFlash function that I need to include. Which needs to run from RAM.

The first example I tried wouldn't build properly for FLASH. The second built & I was able to step thru to find the changes I need to make.

Thanks for pointing out the obvious.

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