Original question:
sir i need using capture register will be able to find frequency , then value present in that register it will be micro , milli , nano sec that information ,i need it , and in PWM calculate time period we one formula time period = period (ns) * clock frequency (Mhz) -1 like is they any formula for quadrature capture period register.
please as soon as possible,
thank you,
nanda kumar
Hi Nanda Kumar,
The capture timer will run from the prescaled VCLK3.
For example if your VCK3 is 75Mhz.
And your prescaled value is 2
And if you got the capture register value of 500 then you should calculate the period like below
Period = (1/(VCLK3/Prescaled_value))*Capture register value
Period = (1/(75Mhz/2))*500
Period = (1/37.5Mhz)*500 = 13.33uSec.
In this way you should calculate the period.
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Thanks & regards,
Jagadish.
