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MSP430F6659: Timer B auto reload mode

Part Number: MSP430F6659

Hey Guys,

I am developing one of my product using MSP430F6659 Microcontroller.

I am facing problem during measure Frequency of Voltage using Timer B0.

I give square wave of 50Hz on P2.6 which is using as interrupt pin as Lo - Hi edge interrupt on it.

When interrupt occur on this pin i start timer and counting the time until once interrupt not occurs on P2.6.

Now my question is when my timer's register is over at FFFF and then goes to 0000 at that time timer's interrupt occur.

I check that interrupt is occur for timer but after that my controller can't come back from that ISR routine.

so what i have to do?

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