TMDSCNCD28388D: I Cannot Change Clock Source to Internal Osscillator

Furkan Erzincanli

Part Number: TMDSCNCD28388D
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hello everyone,

I am working with an F28388D development kit and I prefer not to use an external oscillator. Instead, I want to use the internal oscillator. I have selected the internal oscillator through SysConfig and have configured the necessary division and multiplication settings in the System PLL and Auxiliary PLL sections. The relevant screenshots are attached below.

I added device support and CMD file to the project:

I selected internal osscillator2 and changed div and mult values accordingly:

I also changed the PLL settings for auxillary PLL.

However, when I try to compile and debug the code, it either gets stuck at __error__ (device.c, line 158) or hangs at the SysCtl_setAuxClock(DEVICE_AUXSETCLOCK_CFG); function.

I am not sure where I might be making a mistake. Could someone please help me understand what I might be doing wrong?

Thank you in advance!

over 1 year ago

0 Aishwarya Rajesh over 1 year ago

TI__Mastermind 20275 points

Hi Furkan,

The expert is currently out of office today due to US holiday. Please expect a delay in response.

Best Regards,

Aishwarya

0 Prarthan Bhatt over 1 year ago

TI__Mastermind 18166 points

Hi Furkan,

Can you check if the clocktree.h is included for project build and has the correct settings you selected from the GUI ?

Furkan Erzincanli said:
compile and debug the code, it either gets stuck at __error__ (device.c, line 158) or hangs at the SysCtl_setAuxClock(DEVICE_AUXSETCLOCK_CFG); function.

Can you step through the code and see exactly where the error is and check whether clocktree.h is generating that ?

Thanks.

0 Furkan Erzincanli over 1 year ago in reply to Prarthan Bhatt

Prodigy 170 points

Hi Prarthan,

1) I checked the device folder and I am confirming that the clokctree.h is included. However, I am not sure that I select all the correct settings. Because I couldn't find detailed document for the ClockTree configuration.

Prarthan Bhatt said:
Can you step through the code and see exactly where the error is and check whether clocktree.h is generating that ?

Code give __error__ in "ASSERT(SysCtl_getAuxClock(DEVICE_OSCSRC_FREQ) == DEVICE_AUXCLK_FREQ);" line.

+1 Prarthan Bhatt over 1 year ago in reply to Furkan Erzincanli

TI__Mastermind 18166 points

Hi Furkan,

Can you make sure the AUXPLL settings are what you want from clocktree.h ?

DEVICE_AUXCLK_FREQ is not matching the actual auxpll frequency hence it the error

The formula for AUXCLK_FREQ uses OSCSRC_FREQ which can be different for two PLLs -SYSPLL and AUXPLL. Try changing both the PLL source to INTOSC2 and see if the error goes away.

Thanks

0 Furkan Erzincanli over 1 year ago in reply to Prarthan Bhatt

Prodigy 170 points

Hi Prarthan,

I change the PLL source to INTOSC2 on both. And that resolved my issue.

Thanks for your help.

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TMDSCNCD28388D: I Cannot Change Clock Source to Internal Osscillator