Control DC motor
ObjectiveThe course will show you how to use “Processing” to control the speed of the DC motor. Equipment
SchematicProgramRefer to MicroduinoDCMotorControl ProcessingDCMotorControl DebuggingStep 1：Build hardware environment in accord with the schematic, just like this:
The code of the two ends (Processing and Microduino) Microduino: //Send output value to the motor after getting the serial data if(Serial.available())//if serial is available
{
leitura=Serial.read();//read serial data
Serial.println(leitura);
vel=map(leitura,0,255,0,1023);//map
if(leitura>0)//run motor by leitura
{
analogWrite(motorPin,vel);
delay(1);
}
else//stop motor
{
analogWrite(motorPin,LOW);
}
}
Processing: //List all the serial ports and get data of the first serial port // List all the available serial ports in the output pane. // You will need to choose the port that the Wiring board is // connected to from this list. The first port in the list is // port #0 and the third port in the list is port #2. println(Serial.list()); // Open the port that the Wiring board is connected to (in this case #0) // Make sure to open the port at the same speed Wiring is using (9600bps) port = new Serial(this, Serial.list()[0], 9600); //Draw and update void draw()
{
background(0);
update(mouseX/10);
println(mouseX);
}
//Transmit the x-coordinate value of the mouse through the serial port and draw the current value on Processing void update(int x)
{
port.write(x);
stroke(255);
line(mouseX, 0, mouseX, 160);
text (mouseX, mouseX, 180);
}
Step 3：Download the code and compile successfully. . Step 4：Move your mouse around in “Processing” after the system goes well to see speed change of the motor. ResultA simple speed indicator will be displayed on the screen. The speed of the motor will change along with the change of your mouse on the x-coordinate.
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