Increase the frequency in Simple Waveform generator with Arduino Due

Official Hardware Mega Due
1

Hello!
I'm new here
my question is if you can amumentar frequency in the program:
/*
Simple Waveform generator with Arduino Due

  • connect two push buttons to the digital pins 2 and 3
    with a 10 kilohm pulldown resistor to choose the waveform
    to send to the DAC0 and DAC1 channels
  • connect a 10 kilohm potentiometer to A0 to control the
    signal frequency

*/

#include "Waveforms.h"
//#inlude "Arduino.h"
#define oneHzSample 1000000/maxSamplesNum // sample for the 1Hz signal expressed in microseconds

const int button0 = 2, button1 = 3;
volatile int wave0 = 0, wave1 = 0;

int i = 0;
int sample;

void setup() {
analogWriteResolution(12); // set the analog output resolution to 12 bit (4096 levels)
analogReadResolution(12); // set the analog input resolution to 12 bit

attachInterrupt(button0, wave0Select, RISING); // Interrupt attached to the button connected to pin 2
attachInterrupt(button1, wave1Select, RISING); // Interrupt attached to the button connected to pin 3
}

void loop() {
// Read the the potentiometer and map the value between the maximum and the minimum sample available
// 1 Hz is the minimum freq for the complete wave
// 170 Hz is the maximum freq for the complete wave. Measured considering the loop and the analogRead() time
sample = map(analogRead(A0), 0, 4095, 0, oneHzSample);
sample = constrain(sample, 0, oneHzSample);

analogWrite(DAC0, waveformsTable[wave0]); // write the selected waveform on DAC0
_ analogWrite(DAC1, waveformsTable[wave1]); // write the selected waveform on DAC1_
* i++;*
* if(i == maxSamplesNum) // Reset the counter to repeat the wave*
* i = 0;*
* delayMicroseconds(sample); // Hold the sample value for the sample time*
}
// function hooked to the interrupt on digital pin 2
void wave0Select() {
* wave0++;*
* if(wave0 == 4)*
* wave0 = 0;*
}
// function hooked to the interrupt on digital pin 3
void wave1Select() {
* wave1++;*
* if(wave1 == 4)*
* wave1 = 0;*
}
thanks

2

Junk it and start afresh without using delay / delayMicroseconds. Using a delay
in a loop is not the way to set a precise frequency. You need to start the
loop body at the correct time steps by waiting (which can also be done using
an interrupt routine triggered from a timer).