How can I create a frequency meter?

[angel d 0]

I need to do a frecuencymeter, but firts i need an interruption every second and in this interrupt count pulses in one line (ex. PD_0). only i need to do this interrupt

how i can do?

[vladn 3]

If the frequency is low (< few kHz) you can simply count interrupts from that pin in a 1s interval using Energia-only code. This is very easy to do. I can help you with that. However If you want something more serious (say >10kHz) you need to learn how to program Tiva timers at the low level (or find an existing frequency counter project).

 

I've done an enhanced resolution (oversampling) frequency counter on a MSP430, but it is not using Energia and the code is not in the public domain (have not decided on that yet).

[energia 485]

Here is a really nice tutorial for a Tiva frequency counter: http://coder-tronics.com/stellaris-timer-example/

Note that Timer5 is used for keeping track of millis(), micros() and delay().

[vladn 3]

What is the highest frequency you want to measure and the accuracy you want to achieve ?

[angel d 0]

thaks the tutorial is very good, is just what I needed

[Antscran 35]

Hi,

 

Just joined as noticed some traffic from here to my site.

 

@@energia, thank you for posting the link

 

@@angel d, glad you found it useful

 

I own one of the LM4F based Stellaris Launchpads but not had time to use it yet, as focussing on the C2000 for my course.  I will try and add more useful tutorial as and when I have time.

 

Cheers,

Ant