Linux/EVMK2H: Getting DSP real time frequency on Linux

Yoyo Lee

Part Number: EVMK2H

Tool/software: Linux

Hi,

We want to figure out the real time DSP frequency while running the code on Linux. We are using MCSDK 3.1.4.7. There is a CSL function call

"CSL_tscRead()" that return clock cycle. However, to convert to real time, we need to know the real time frequency. Keystone 2 data sheet listed DSP can go up to 1.2GHz, and ARM can go up to

1.4GHz. These information are great, but we wish there is a function call from maybe Chip Support Library to get the real time frequency for the DSP. Could you help us?

Sincerely

Yoyo

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

See the following threads:
e2e.ti.com/.../456221
e2e.ti.com/.../510241
e2e.ti.com/.../510416
e2e.ti.com/.../468113

They should answer your question.

Best Regards,
Yordan

0 Yoyo Lee over 8 years ago in reply to Yordan Kovachev

Intellectual 695 points

I went through all of the threads. My understanding is that for Linux environment, SYSCLK is not enough to set/monitor the actual frequency. To monitor the actual frequency, I need to use either searching inside "ti/ks2_evm/board_k2x.c" to get the frequency configuration or use "getclk" from U-boot terminal for the right clock index.

Now the issue is that I could not find the "board_k2x.c", where it should be locate at? I am still not 100% sure, getclk at index 0 is the correct location to check for K2H DSP(Core) frequency?

Sincerely

Yoyo

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Linux/EVMK2H: Getting DSP real time frequency on Linux