F28035 - How to set GPIO to measure the execution time?

Thank you,

Now I'm working withouth the oscilloscope...

it could be the same by using the LED? Just for debug purposes..

Thank you in advance...

Wow, why so complicated? Do you use all 3 timers? If not I would use timer peripheral to measure execution time.

Regards,
Maciej 

Hi 

  How to measure the execution time by using a timer???

  Is it possible that without using oscilloscope can able to calculate execution time???

Thanks in advance

Thirumoorthy.R

You need to:

1. Setup timer
2. Reset timer
3. Start timer
4. Call your function
5. Stop timer 
6. Read timer value

You can also measure time required to start and stop timer to get exact execution time. You need to calculate (or measure) time of 1 timer clock period to get execution time in [s].

If you need help with setting timer I recommend starting with following materials: http://e2e.ti.com/group/universityprogram/educators/w/wiki/2038.c2000-teaching-rom.aspx

Additionally you should find some examples in: 

Hi ,

  Thanks for your fast reply. I will try to configure my timer to measure a time period of function.

Regard's 

Thirumoorthy.R

I'm using an F28035.

At the moment, I need just see on hardware when a function starts and stops... no more...

Thank you in advance

Hi pietro

  You are correct. If you want to see the start and stop time means, You need to use a LED.

   That is the easiest way to find start and stop time of a function in hardware.

Regard's

Thirumoorthy.R

I need only just a sample code... how to do thath in a simplest way?

Thank you,,,

Pietro Luigi Carotenuto said:

I need only just a sample code... how to do thath in a simplest way?

See links from my previous post.

The following wiki article may also be useful in showing the various methods of profiling:
http://processors.wiki.ti.com/index.php/Profiling_on_C28x_Targets

-Brett

I'm using  the following code:

EALLOW;
GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 0;
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1;

GpioDataRegs.GPBSET.bit.GPIO34 = 1;

but nothing happens (the LED should be on).

I have included the DSP280x_Project.h to my project.

Some help?

Pietro,

From my memory, the controlCARD's LED works with negative logic.  Try GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1; or GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1; instead.


Thank you,
Brett

It returns the following error:

C28xx: AutoRun: Target not run as the symbol "main" is not defined

And ...After some change:

Description Resource Path Location Type
unresolved symbol _GpioCtrlRegs, first referenced in ./main.obj Cskel1 C/C++ Problem

Description Resource Path Location Type
unresolved symbol _GpioDataRegs, first referenced in ./main.obj Cskel1 C/C++ Problem

Some help, please?