Hi Patryk,
As per my understanding to generate a sine wave with specific parameters amd output it through DAC on a Raspberry Pi, first calculate the sine wave based on the given parameters and then write the sine wave to the DAC0 output. The output at DAC0 can be measured using an ADC.
Please refer to the below MATLAB code for implementation of the above:
% Calculate the sine wave
sin_wave = A * sin(2 * pi * f0 * t + p);
% Connect to Raspberry Pi
rpi = raspi();
% Set up SPI objects for DAC
dac = spidev(rpi, 'CE1');
dac.frequency = 2000000;
% Configure DAC pin
csdac = 23;
configurePin(rpi, csdac, "DigitalOutput");
% Write the sine wave to DAC0 output
for i = 1:length(sin_wave)
% Convert the voltage to DAC value (assuming 5V reference)
dac_value = uint16((sin_wave(i) / 5.0) * 4095);
% Send the DAC value to DAC0
writeDigitalPin(rpi, csdac, 0); % Start SPI conversation
writeRead(dac, [hex2dec('30'), bitshift(dac_value, -8), bitand(dac_value, 255)]); % Send the DAC value
writeDigitalPin(rpi, csdac, 1); % End SPI conversation
pause(dt);
end
% Optionally, you can measure the output at DAC0 using an ADC if needed
% You can use MATLAB's Data Acquisition Toolbox to interface with ADC
Hope this helps!
