#define PIN_LEDR_out 3
#define MyResolution 10
void setup() {
// put your setup code here, to run once:
analogWriteResolution(MyResolution);
}
void loop() {
// put your main code here, to run repeatedly:
uint32_t myFreq, myDelay;
for(int i = 0; i < 16000; i += 1000) {
myFreq = 16000 - i;
myDelay = 1000000 / myFreq;
analogWriteFrequency(PIN_LEDR_out, myFreq);
for(int j = 0; i < (1 << MyResolution); i++) {
analogWrite(PIN_LEDR_out, 1023 - j);
delayMicroseconds(myDelay); //give it the time to accomplish at least 1 PWM cycle, the Teensy risks to be too quick.
}
}
}
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
// GUItool: begin automatically generated code
AudioSynthWaveformSine sine1; //xy=170,106
AudioOutputAnalog dac1; //xy=341,120
AudioConnection patchCord1(sine1, dac1);
// GUItool: end automatically generated code
void setup() {
AudioMemory(8);
sine1.amplitude(0.9);
sine1.frequency(0.1);
}
void loop() {
}
Does the result fit in 16 Bits (signed)?
#define LOW_FREQ 1.0f // 1.0f Hz does not produce output, 10.0f Hz produces blinking LED
int led_onboard_pin = 13; // teensy-lc LED0
int ctrl_pin_lofreq = 6; // FTM0, teensy-lc 6,9,10,20,22 or 23
void setup()
{
Serial.begin(9600);
reinit();
}
void reinit()
{
pinMode(led_onboard_pin , OUTPUT);
pinMode(ctrl_pin_lofreq, OUTPUT);
analogWriteResolution(16);
analogWriteFrequency(ctrl_pin_lofreq, LOW_FREQ);
analogWrite(ctrl_pin_lofreq, 32768);
Serial.println("Initialized");
}
void loop() {
char b;
// Check "frequency" output and reproduce it on LED
if (digitalRead(ctrl_pin_lofreq)) {
digitalWrite(led_onboard_pin, HIGH);
} else {
digitalWrite(led_onboard_pin, LOW);
}
// Handle USB Serial
if (Serial.available()) {
b = Serial.read();
if (b == 'r') {
reinit();
}
if (b == 's') {
Serial.print("IRC is ");
if (MCG_S & 1) {
Serial.println("4 MHz");
} else {
Serial.println("32 kHz");
}
Serial.print("MCG_C1 = ");
Serial.println((int)(MCG_C1 & 0xFF)); // 32 = 0x20 = 0b0010.0000 : 00b ClkSrc FLL/PLL, 100b div16, extref, MCGIRCLK inactive,
}
}
}void setup() {
analogWriteResolution(16);
analogWriteFrequency(6, 5.7220459);
analogWrite(6, 32768);
}
void loop() {
}