Servo

Create connection to servo motor

Description

servo(mypi, pinNumber) creates a servo motor object connected to the specified pin on the Raspberry Pi™.

servo(mypi, pinNumber, Name,Value) creates a servo motor object with additional options specified by one or more Name, Value pair arguments.

Input Arguments

mypi — Connection to specific Raspberry Pi hardware board

raspi object

Connection to a specific Raspberry Pi hardware board, specified as a raspi object.

pinNumber — GPIO pin number

scalar

GPIO pin number, specified as a scalar. This argument does not accept vectors because the hardware cannot access multiple pins simultaneously.

To get a list of valid pin numbers, enter mypi.AvailableDigitalPins.

Example: 12

Data Types: double

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Example: s= servo(a, 7, 'MaxPulseDuration', 2e-3, 'MinPulseDuration', 1e-3);

MinPulseDuration — Minimum pulse duration

5.44e-4 seconds (default) | numeric

Minimum pulse duration specified as the comma-separated pair consisting of 'MinPulseDuration' and a number, which represents the duration in seconds. Specified value must be equal to the width of the pulse the motor needs to be at the minimum angle. Refer to your device data sheet for valid values.

MaxPulseDuration — Maximum pulse duration

2.4e-3 seconds (default) | numeric

Maximum pulse duration specified as the comma-separated pair consisting of 'MaxPulseDuration' and a number, which represents the duration in seconds. Specified value must be equal to width of the pulse the motor needs to be at the maximum angle. Refer to your device data sheet for valid values.

Output Arguments

s — Servo object

object

Servo object returned as an object.

Examples

Create a Servo Object

Create an raspi object, and attach the servo object to pin 12.

mypi = raspi()
s = servo(mypi,12)

s = 

  Servo with properties:

                Pins: 12
    MinPulseDuration: 5.44e-04 (s)
    MaxPulseDuration: 2.40e-03 (s)

Specify Minimum and Maximum Pulse Duration for a Servo

Set the minimum duration to 7e-4 and maximum to 2.3e-3 seconds.

Create an raspi object and attach the servo object to digital pin 12 and specify

mypi = raspi()
s = servo(mypi,12,'MinPulseDuration',7.00e-4,'MaxPulseDuration',2.3e-3)

s = 

  Servo with properties:

                Pins: 12
    MinPulseDuration: 7.00e-04 (s)
    MaxPulseDuration: 2.30e-03 (s)

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

• You can also deploy servo on the Raspberry Pi hardware in MATLAB^® Online™.

Version History

Introduced in R2016b