I understand that you want to achieve a higher frequency using Arduino MEGA 2560.
To achieve higher frequencies, optimize your code to minimize the time overhead caused by the ‘pause()’ function and other loop operations. Consider utilizing the ‘writePWMVoltage’ function instead of ‘writeDigitalPin’.
‘writePWMVoltage’ is a MATLAB function that is used to set the voltage of a ‘PWM’ pin on an Arduino board. PWM pins allow you to generate analog-like signals by rapidly switching the pin between high and low states at a specific frequency. The ‘writePWMVoltage’ function takes two arguments, the Arduino object and the pin number, and sets the voltage of the specified pin.
Here's a modified version of your code you may refer to,
a = arduino('COM3', 'Mega2560');
f = 100;
PIN1 = 'D9';
configurePin(a, PIN1, 'PWM');
% Calculate the time period in microseconds
T = 1 / f;
while true
writePWMVoltage(a, PIN1, 0); % Set the voltage to 0V
pause(T / 2); % Wait for half a period
writePWMVoltage(a, PIN1, 5); % Set the voltage to 5V
pause(T / 2); % Wait for half a period
end
In the above code,
I have changed the pin to a digital pin (D9), as it has better performance compared to analog pins.
I have directly calculated the time period (T) in microseconds and use it to control the timing of the square wave. By avoiding unnecessary calculations and function calls within the loop, we reduce the overhead and increase the achievable frequency.
This loop generates a square wave with a 50% duty cycle at a frequency of 100 Hz on pin D9 of the Arduino board, causing the connected hardware to oscillate between 0V and 5V.
You can also refer to the following documentation links for further information,
Hope this helps!
