Skip to content

Instantly share code, notes, and snippets.

@RickKimball RickKimball/nco.cpp
Created Oct 17, 2017

Embed
What would you like to do?
nco example for fabooh
/*
* 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();
}
~
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.