nco example for fabooh

nco.cpp

/*
 * nco.cpp - toggle pins at 60Hz and 50Hz using a 50kHz timer clock
 */

#include <fabooh.h>
#include <main.h>
#include <nco.h>

RED_LED RED;
GREEN_LED GREEN;

void config_timer();

void setup(void) {
  RED.setmode_output();
  GREEN.setmode_output();
}

struct toggle_red_led {
  void tick(void) {
    RED.toggle();
  }
};

struct toggle_green_led {
  void tick(void) {
    GREEN.toggle();
  }
};

const long clk_in_freq=50000;

NCO < 60*2, clk_in_freq, toggle_red_led > clk_60Hz;
NCO < 50*2, clk_in_freq, toggle_green_led > clk_50Hz;

void loop(void) {
  config_timer();
  CPU::enable_clkout();
  _EINT();

  while (1) {
  }
}

void config_timer() {
  TA0CTL = TASSEL_2 | MC_1;   // Timer A config: SMCLK, count up
  TA0CCR0  = 320 - 1;         // Setup Timer A CCR0 period for 50,000 Hz
  TA0CCTL0 |= CCIE;           // Enable PWM interrupt
}

#pragma vector = TIMER0_A0_VECTOR
__interrupt void timer_a_isr(void)
{
  clk_60Hz.rising_edge();
  clk_50Hz.rising_edge();
}
~