readSpeed

Read current rotational speed of motor from rotary encoder

Add-On Required: This feature requires the MATLAB Support Package for Arduino Hardware add-on.

Syntax

[speed] = readSpeed(encoder)

[speed,timestamp] = readSpeed(encoder)

Description

[speed] = readSpeed(encoder) returns the current rotational speed measured by the rotary encoder in revolutions per minute (RPM).

[speed,timestamp] = readSpeed(encoder) returns the current rotational speed measured by the rotary encoder in revolutions per minute (RPM) and 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 rotary encoder.

encoder = rotaryEncoder(mcObj,1);

Read the current rotational speed.

speed = readSpeed(encoder);

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 rotary encoder.

encoder = rotaryEncoder(mcObj,1);

Read the current rotational speed.

[speed,timestamp] = readSpeed(encoder);

Input Arguments

encoder — Rotary encoder connection

object

Connection to the rotary encoder on MKR Motor Carrier or Nano Motor Carrier, specified as an object.

Output Arguments

speed — Current rotational speed

double

Current rotational speed as measured by the rotary encoder in revolutions per minute (RPM).

Data Types: double

timestamp — Time elapsed

datetime

Time at which MATLAB^® reads the speed data from the board.

Data Types: datetime

Version History

Introduced in R2020a