How do I average the values received from the function generator
I'm using microcontroller 68HC11 and I would like to average the values received from it.
Do I store it into array 1st and then loop it? How?
For example
function gen might output frequency,
1.23hz
2.13hz
1.54hz
3.53hz
1.85hz
1.81hz
and so on so forth..
I need to average it over the previous 5 seconds.
So what's the problem?
You could store it in an array or keep a running total.
It is too clear and so it is hard to see.
A dunce once searched for fire with a lighted lantern.
Had he known what fire was,
He could have cooked his rice much sooner.
The problem is I have no idea where to start. the frequency will generate every 33microsec, How do I add them all up, and then divide it by god knows how many times it count, to get the avg.
And 1 more thing, I still need it to average over the recent 5 seconds, how do I do so it will forget the last second, and then add the new second.
The array is now circular... that is it will start at 0 progress to 4 then loop back to 0 again... you will always have the last 5 entries in the array. If you are only looking for an average, just add 'em up and divide by 5.Code:int data[5]; int dataptr = 0; // data loop void AddData( int *data, int *dataptr, int newdata) { data[*dataptr] = newdata; dataptr = (dataptr + 1) % 5; }
Trust me... 2.3hz isn't happening on microsecond intervals... 2.5hz is 400 milliseconds. With 1 digit frequencies you can capture data every 100 milliseconds and not miss anything.
Last edited by CommonTater; 12-07-2011 at 07:14 PM.
