Timer example?

David Aldrich92784

Genius 3720 points

Please will someone point me to example code for using a hardware timer on C66x devices?

Best regards

David

over 11 years ago

0 Raja over 11 years ago

TI__Guru* 81335 points

Hi David,

You can start with the CSL examples for Timer and Interrupt controller.

Please take a look at the example folder of C6678 CSL (C6657 CSL folder seems not have those examples), such as:

C:\ti\pdk_C6678_x_x_x_x\packages\ti\csl\example\timer

The CSL API usage should be the same between C6678 and C6657. In your project, you could use the C6657 CSL library.

Please note the timer numbers in the example as well since C6657 may not have as many timer as C6678.

The timer CSL example also includes one watchdog timer example. You can get a general idea of how to enable the CPU interrupt and Timer event based on that as well.

You can download the BIOS MCSDK in the following link which includes the C66x PDK/CSL packages:

http://www.ti.com/tool/bioslinuxmcsdk

Please refer below thread for more information.

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/260889.aspx

Thanks.

0 David Aldrich92784 over 11 years ago in reply to Raja

Genius 3720 points

Hi Rajasekaran

Thanks very much for the pointer to the C6678 timer example. That answers my question.

While I am here, I would like to ask a related question. I need to generate a periodic 1ms interrupt on multiple dsp cores. The interrupts must be synchronised - i.e. all cores should see the interrupt at the same time. Can I use a single timer and interrupt multiple cores from it?

Best regards

David

0 Raja over 11 years ago in reply to David Aldrich92784

TI__Guru* 81335 points

Hi David,

From my understanding, one core shall get the timer interrupt and communicate the event to other cores. The core to core communication shall happen through IPC or the shared variable across multiple cores.

Please refer image processing demo for IPC implementation.

PATH: ..ti\mcsdk_2_x_x_x\demos\image_processing

http://processors.wiki.ti.com/index.php/MCSDK_Image_Processing_Demonstration_Guide

Thanks.

0 David Aldrich92784 over 11 years ago in reply to Raja

Genius 3720 points

Hi Rajasekaran

Thanks again for your answer.

Do you have any example code for using the timers with a 6634K2H device please?

Best regards

David

0 Raja over 11 years ago in reply to David Aldrich92784

TI__Guru* 81335 points

Hi David,

Please refer PDK of MCSDK3.x for Keystone II devices.

Path: ..\ti\pdk_keystone2_3_00_04_18\packages\ti\csl\src\ip\timer\V0

Download: http://software-dl.ti.com/sdoemb/sdoemb_public_sw/mcsdk/latest/index_FDS.html

Thanks.

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Timer example?