TSCL add 1 per cpu cycle?

Jack S

I timing my program by using TSCL, code like below:

unsigned long long int count = 0;
count = (TSCH<<32) + TSCL;//start time
//my program...
count = (TSCH<<32) + TSCL - count;//get the time of my program running

but I found that TSCL is not adding 1 per cpu cycle, in my program it about adding 1 per 10 cpu cycles.

Is there a methord to control TSCL adding step?

over 12 years ago

0 one and zero over 12 years ago

TI__Mastermind 18256 points

Hi,

the TSC is a free running timer. Once it is started it's running forever and can not be halted or modified. It's running at CPU speed.

Kind regards,

one and zero

0 Jack S over 12 years ago in reply to one and zero

Intellectual 850 points

one and zero,

I have another question:

when I call the function CSL_tscEnable(), the CCS complier give a error said it is "undefined symbol",

I have include the head file "ti\csl\csl_tsc.h", But I only founded the declaration in the head file.

Need to include other files?

0 one and zero over 12 years ago in reply to Jack S

TI__Mastermind 18256 points

... you also need to link in the CSL library.

Kind regards,

one and zero

0 Jack S over 12 years ago in reply to one and zero

Intellectual 850 points

Oh, right!

but, I can't find the lib file for C66x ...

Where is it?

Very Kind Regards,

0 Rahul Prabhu over 12 years ago in reply to Jack S

TI__Guru** 116780 points

Hi Yuanrui,

When you install the mcsdk for your device, you will find a PDK folder in the install path. The csl library can be found under the path pdk_<device>_x_x_x_x/packages/ti/csl/lib. The library extensions are .ae66(little endian ELF format) and .ae66e (big endian ELF format).

Regards,

Rahul

0 Jack S over 12 years ago in reply to Rahul Prabhu

Intellectual 850 points

Hi Rahul,

Thank you very much!

The library extensions are .ae66. I assumed it as .lib before.

Regards

Yuanrui S.

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TSCL add 1 per cpu cycle?