Using Timer Register Value for PWM pulse width

[faysal_002299]

Dear all,
I am using the following code for calculating the pulse width of a PWM. But can't come up with any result. Please help me.
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// initialization of Timer3. Timer3 will be used for calculating the time for a number of pulses
void InitTMR3(void)
{
T3CON = 0x0030; // internal Tcy/256 clock
TMR3 = 0;
PR3 = 0x8000;
return;
}

// INT2 for capturing the input PWM. May be I can replace this with IC or CN pins
void __attribute__((__interrupt__)) _INT2Interrupt(void)
{
Count=Count + 1; // Counting every positive edge of the PWM
if (Count>60) // I want to count the time for every 60 pulses
{
SendData(TMR3); // SendData function sends information to host PC
TMR3 = 0; // Again start counting from beginning after every 60 pulses
Count=0; // Start counting again after every 60 pulses
}
IFS1bits.INT2IF=0; //clear INT2 interrupt flag
}
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I am confused about the TMR3 as I am not getting any value from it. Isn't it suppose to work as a counter? If anybody know any alternative solution I would be grateful. For any further question please ask me.

with thanks

 

[mister_e]

This probably a golden situation where CCP module becomes handy.

Have a look at the following Microchip document
https://www.electro-tech-online.com/custompdfs/2008/11/41214a.pdf