CCS/TMS320F28379D: TMS320F28379D

alireza asadiov

Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE

Tool/software: Code Composer Studio

Hello
I ran the timer project from the code below in code composer.

C: \ ti \ c2000 \ C2000Ware_2_00_00_02 \ device_support \ f2837xd \ examples \ cpu1 \ timed_led_blink

In the code description, every 500 milliseconds LED is toggel, meaning every 500 milliseconds is interrupted. But if I change the frequency of the cpu, the time will change. What is the relationship between cpu frequency and this period?

over 6 years ago

0 Ozino Odharo over 6 years ago

TI__Mastermind 21600 points

Alireza,

If you look in the file F2837xD_CpuTimers.c, you will notice that the Freq and Period are used to determine the period for the timer. Note that the values passed into this function are MHz for frequency and uSecs for Period. If the numbers seem incorrect, it mat be due to errors in the comments.

Regards,

Ozino

0 alireza asadiov over 6 years ago in reply to Ozino Odharo

Prodigy 140 points

thanks very much.

0 alireza asadiov over 6 years ago in reply to alireza asadiov

Prodigy 140 points

I set the CPU frequency to 200MHz and Period to 1000000 but the interrupt time is not a second. Where's the problem?

0 Ozino Odharo over 6 years ago in reply to alireza asadiov

TI__Mastermind 21600 points

Alireza,

What did you observe once you entered your desired settings? Have you considered the driverlib equivalent example? It is easier to understand and modify.

-Ozino

C2000™︎ microcontrollers

C2000 microcontrollers forum

CCS/TMS320F28379D: TMS320F28379D