CCS/CCSTUDIO: Wait nano seconds function

Stefano Carlesi

Expert 1325 points

Part Number: CCSTUDIO

Tool/software: Code Composer Studio

Hi there,

I'm running an application with a 100MHz system clock.

What is the best way to implement a "wait nano seconds" function?

Thank you

Regards

Stefano

0 Stefano Carlesi over 8 years ago

Expert 1325 points

I'm now using a C5515 EVM.
My project is using DSP-BIOS.

0 Yordan Kovachev over 8 years ago in reply to Stefano Carlesi

Hi,

The sw team have been notified. Their feedback will be posted here.

Best Regards,
Yordan

0 Lalindra Jayatilleke over 8 years ago

Stefano,

Not sure if you can go down to that granularity.
Perhaps create a routine with NOPs?

Lali

0 Stefano Carlesi over 8 years ago in reply to Lalindra Jayatilleke

Expert 1325 points

I did implement an asm NOP function, but I'm not sure about the actual executon time.

Is there a way to see with the emulator how many clock cycle an instruction uses?

I configured the sysclk to 100MHz, that give a 10ns clock period.

My question could also be:

if I want to manually generate a clock by setting HIGH and LOW a GPIO, how can I do it if the desidered frequency is lower then 1us?

0 Lalindra Jayatilleke over 8 years ago in reply to Stefano Carlesi

Stefano,

Bit banging a GPIO to do it might not be feasible. Please see this thread.e2e.ti.com/.../462782
Also, CCS has a profile clock feature processors.wiki.ti.com/.../Profile_clock_in_CCS

Lali

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