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Found 2 results

  1. I'm trying to find the frequency of an incoming signal. I set the incoming signal (sine wave = 162 MHz, amp=3V) as the clock for TimerA0. TimerA2 will be used to keep count in order to calculate the frequency. Once the freq is calculated I'm setting the DCO for the SMCLK. Frequency should be around 20 MHz. The TIMER_A2 ISR is not accessed at all. Not sure if the correct ISR is being used or even if this is the best/simplest way to find the frequency. Thanks void main(void) { Port_Mapping(); // Access port mapping code SetVcoreUp (0x01); // Increase Vcore setting to level 3 to support 25M
  2. Hello, I'm a beginner so I think the answer is simple. I have an HC-SR04 connected to 4 AA batteries at 5.4V. The echo from the ultrasonic sensor goes through a voltage divider with 20k and 10k ohm resistors before going into P1.1. My f2013 is being powered by the usb programming tool and is using P1.2 as the out/trigger pin for the hc-sr04. I beleive the sr04 can take a 3.3V trigger. This is my code below, I just can't figure out why my interrupt isn't triggering. I borrowed some code from the internet. I can't remember his username, but the guy with the wall racer with two
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