The top trace represents my sensor input into a CCP. It is Hall Effect sensor That is detecting the rotation of a hard drive platter running at a fairly constant RPM. Somewhere around 800 RPM.

The bottom trace is a latch port that I am quickly turning off and back on on every CCP interrupt. It looks like every 1.98 seconds the latch stays off for 84ms (that is one rotation of the disk). Why would my latch not be turning back on so regularly?

My chip is a PIC18F27J13 running at 8MHZ,

Here is my interrupt code.

if (PIR4bits.CCP5IF == 1)
  {
  
  PIR4bits.CCP5IF = 0;  
  
  LATBbits.LATB4 = 0;  
  LATBbits.LATB4 = 1;
  }

 

Please post the whole code, config and everything.

 

You are a genius. When I went to post the code. I saw the issue.

I was also turning it off in a timer ISR.

 

You are a genius. When I went to post the code. I saw the issue.

I was also turning it off in a timer ISR.

When will we get real AI so the computer will do what we want, not what we program it.

 

When will we get real AI so the computer will do what we want, not what we program it.

Yeah my compiler should be smarter than that.