I'm trying to generate 6 PWM signals by comparing sine and triangular waves on simulink.In the scope I'm getting the frequency of PWM signals as 50 HZ. But when I deploy the model onto arduino, the frequency of the PWM signal is getting reduced to around 15 HZ .How to fix this ?
whether you've downloaded arduino library for matlab simulink? PWM output later on arduino digital pins are connected to the scope matlab
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I'm using STM32 and i need to find analog voltage period and average value of connected signal which is connected to PC0. I need to read the analog voltage and find the period of signal. I need to write a c code.
I am trying to use the Arduino MKR Zero in Simulink using the Simulink Support Package for Arduino Hardware. So far I have been successful at get a led to blink using a pulse wave in Simulink and the Digital output of the Arduino. I have also been able to vary a potentiometer connected to the Analog input of the Arduino and see the voltage plotted on a scope.
Now I am trying to output a sine wave from the DAC and then view that sine wave back through the ADC. The image below shows my setup. I know that the DAC takes value between 0 and 1023 and converts it to a voltage with reference 3.3V for the Arduino MKR Zero. So I have set up the sine wave block with Amplitude 307 and bias of 307 to get a 2V pk to pk waveform with offset of 1V. I have also included the Byte pack to convert this value to a Unit16 value for the DAC.
Now for the output I have done a similar setup to what I had for the potentiometer experiment. In this section, K = 3.3/4095. However, when looking at the scopes for the input and output, they are completely different. The input scope shows a sine wave with a 2V pk to pk waveform with offset of 1V while the output doesn't make any sense.
I should point out, for the physical setup, I have simple connected the DAC pin to the A6 pin on the Arduino. Any advice on what I am doing wrong is welcome.
Simulink Setup:
This is an image of the waveforms on the scopes:
I wanted to simulate the Sent_Protocol with an STM32 μC emulate as if I had a sensor. and represent this with an oscilloscope . I have to simulate this on Matlab and then connect with STM32. so i thought the signal should be like a normal PWM Signal look like.
So I wanted to ask if it is possible to generate a different pulse width in the same signal as in the above picture ?
I tried to generate a 40khz pulse to the GPIO pin of my ultrasonic sensor in raspberry pi. I used the pulse generator instrumentation, but the pulse is not accurate: the oscilloscope displays only 10khz.
I modified configuration parameters:
fixed-step
sample time is auto/1e-08
solver is auto/discrete
I also have tried various ways to create a square pulse: function sign(sin(2*pi*40000t)), PLL block, repeating sequence, signal generator combined with sum, compare to zero, etc.
All of these display correctly on the scope, but do not deploy accurately.
I doubted the raspberry pulse generatior, so I used python to drive the GPIO pin; results are very accurate. I worry that the Simulink complier doesn't properly support raspberry or the sample time.
Any suggestions?
This is the model I used to generate 40khz pulse.
with period is 0.000025s,pulse width 50%, Solver type is fixed-step.
The oscilloscope display as the following figure:
Good day everyone!
I tried to make a circuit in matlab simulink, with an AC voltage, Resistor and Voltage measurement. AV voltage and Resistor connect quite well but voltage measurement can't connect the resistor connection.
how may I connect the voltage measurement to the resistor? Please help me thanks!
this is the circuit i want to simulate
I used different types of resistor, and Ac voltage but same results
In my opinion, your diode is from a different library (Simscape\Foundation Library\Electrical) than the voltage source, the resistance and the voltage measurement block (Power Systems...). Try to use blocks from the same Library.
See following picture for when I only use blocks from Simscape\Foundation Library\Electrical