readSpeed

Read current rotational speed of DC Motor in closed loop control

Since R2020a

Syntax

[speed] = readSpeed(pidObj)

[speed,timestamp] = readSpeed(pidObj)

Description

[speed] = readSpeed(pidObj) returns the current rotational speed of the DC motor in closed-loop control as read by the quadrature encoder connected to encoder channel number corresponding to PID motor number.

[speed,timestamp] = readSpeed(pidObj) returns the current rotational speed of the DC motor in closed-loop control as read by the quadrature encoder connected to encoder channel number corresponding to PID motor number, and the timestamp in datetime format.

Examples

Read Current Rotational Speed

Create a connection to the Nano Motor Carrier.

arduinoObj = arduino('/dev/ttyACM0','Nano33IoT','Libraries','MotorCarrier');
mcObj = motorCarrier(arduinoObj);

Create a connection to the PID Motor in speed control mode.

pidObj = pidMotor(mcObj,1,'speed');

Read the current rotational speed.

speed = readSpeed(pidObj);

Read Current Rotational Speed with Timestamp

Create a connection to the Nano Motor Carrier.

arduinoObj = arduino('/dev/ttyACM0','Nano33IoT','Libraries','MotorCarrier');
mcObj = motorCarrier(arduinoObj);

Create a connection to the PID Motor in speed control mode.

pidObj = pidMotor(mcObj,1,'speed');

Read the current rotational speed.

[speed,timestamp] = readSpeed(pidObj);

Input Arguments

pidObj — PID motor object

object

PID motor object connected to MKR Motor Carrier or Nano Motor Carrier specified as an object.

Output Arguments

speed — Current rotational speed

double

Current rotational speed in RPM of the DC Motor as read by the encoder, returned as a double.

timestamp — Time elapsed

datetime

Time at which MATLAB^® reads speed data, specified as a datetime.

Version History

Introduced in R2020a