bunt _
Creates square-wave frequency output on pin p22. Custom frequency between 1Hz and 48 MHz. (LPC 1768)
Creates square-wave frequency output on pin22 with custom frequency.
Tested for frequencies from 1Hz to 48MHz. The accuracy depends heavily on the frequency - at 12, 24, 48 MHz the frequency deviation is less than 1%, but at 20 MHz it is about 20%.
Uses Library FastPWM ( http://mbed.org/users/Sissors/code/FastPWM/ ). For LPC 1768.
How to use this Library:
#include "mbed.h"
#include "PwmOscillator.h"
PwmOscillator oscillator;
DigitalOut led1(LED1);
int main()
{
oscillator.initWithFrequency(8000000); // initialize oscillator instance (pin p22) with custom frequency, here: 8MHz
led1=1; // optional: indicator LED shows that oscillator is running
oscillator.start(); // start oscillator
wait(5); // optional: oscillator is running 5 seconds
oscillator.stop(); // stop oscillator
led1=0;
}