configurePin - Configure GPIO pin as digital input or digital output - MATLAB (original) (raw)

Configure GPIO pin as digital input or digital output

Since R2021b

Syntax

Description

configurePin([hwobj](#mw%5Fec4d0427-80cc-4d06-9c5b-be8566e30c7e%5Fsep%5Fmw%5Fe4ef5c3f-193d-4700-99b9-936c8ea29966),[pinNumber](#mw%5Fec4d0427-80cc-4d06-9c5b-be8566e30c7e%5Fsep%5Fmw%5Fd0264a27-682e-426b-b785-46d9a0f692df),[mode](#mw%5Fbe1c9485-a84a-4221-b1eb-dfd7b10f09de)) configures the GPIO pinNumber pin of the Jetson™ board as a digital input or digital output depending on the specifiedmode.

example

[pinMode](#mw%5F124b4555-f3d7-4391-b192-718578b107fa) = configurePin([hwobj](#mw%5Fec4d0427-80cc-4d06-9c5b-be8566e30c7e%5Fsep%5Fmw%5Fe4ef5c3f-193d-4700-99b9-936c8ea29966),[pinNumber](#mw%5Fec4d0427-80cc-4d06-9c5b-be8566e30c7e%5Fsep%5Fmw%5Fd0264a27-682e-426b-b785-46d9a0f692df)) returns the current configuration mode of the pin.

Examples

collapse all

Configure a GPIO pin as digital input and read its logical value.

Create a connection from MATLAB® to the NVIDIA® Jetson board.

hwobj =

jetson with properties:

       DeviceAddress: 'jetson-board-name'
                Port: 22
           BoardName: 'NVIDIA Jetson TX2'
         CUDAVersion: '10.0'
        cuDNNVersion: '7.6'
     TensorRTVersion: '6.0'
          SDLVersion: '1.2'
         V4L2Version: '1.14.2-1'
    GStreamerVersion: '1.14.5'
       OpenCVVersion: '4.1.1'
             GPUInfo: [1x1 struct]
          WebcamList: []
AvailableDigitalPins: [7 11 12 13 15 16 18 19 21 22 23 24 29 31 32 33 35 36 37 38 40]

The AvailableDigitalPins property shows the list of available digital GPIO pins.

Show the location of the GPIO pins on your device.

Display the AvailableDigitalPins.

hwobj.AvailableDigitalPins

ans =

7 11 12 13 15 16 18 19
21 22 23 24 29 31 32 33
35 36 37 38 40

Connect your digital device to the first GPIO pin available, for example GPIO 7.

Configure pin GPIO 7 as a digital input.

configurePin(hwobj,7,'DigitalInput')

Read the value from pin GPIO 4.

The logical value of 1 indicates a positive voltage signal on the pin GPIO 7.

Configure a GPIO pin as a digital output and write its logical value.

Create a connection from the MATLAB software to the NVIDIA Jetson board.

hwobj =

jetson with properties:

       DeviceAddress: 'jetson-board-name'
                Port: 22
           BoardName: 'NVIDIA Jetson TX2'
         CUDAVersion: '10.0'
        cuDNNVersion: '7.6'
     TensorRTVersion: '6.0'
          SDLVersion: '1.2'
         V4L2Version: '1.14.2-1'
    GStreamerVersion: '1.14.5'
       OpenCVVersion: '4.1.1'
             GPUInfo: [1x1 struct]
          WebcamList: []
AvailableDigitalPins: [7 11 12 13 15 16 18 19 21 22 23 24 29 31 32 33 35 36 37 38 40]

The AvailableDigitalPins property shows the list of available digital GPIO pins.

Show the location of the GPIO pins on your device.

Display the AvailableDigitalPins.

hwobj.AvailableDigitalPins

ans =

7 11 12 13 15 16 18 19
21 22 23 24 29 31 32 33
35 36 37 38 40

Connect your digital device to an available GPIO pin, for example GPIO 11.

Configure pin GPIO 11 as a digital output.

configurePin(hwobj,11,'DigitalOutput')

Write a logical value of 1 to pin GPIO 11.

writeDigitalPin(hwobj,11,1)

The logical value of 1 sets the signal voltage on pin GPIO 11 to high.

Input Arguments

collapse all

Connection to a specific NVIDIA hardware board, specified as a jetson object.

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, use the AvailableDigitalPins property of the jetson object. For example, _`hwobj`_.AvailableDigitalPins.

Example: 12

Data Types: double

Mode used to configure the pin, specified as 'DigitalInput','DigitalOutput', or 'Unset'.

Data Types: char | string

Output Arguments

collapse all

Current configuration mode of pin, returned as 'DigitalInput','DigitalOutput', or 'Unset'.

Version History

Introduced in R2021b