gpio | A RaspberryPi GPIO library written in PHP

by allebb PHP Version: 2.0.2 License: GPL-3.0

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | gpio Summary

gpio is a PHP library typically used in Internet of Things (IoT), Raspberry Pi applications. gpio has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

A RaspberryPi GPIO library written in PHP, This library makes it a breeze to work with simple inputs and outputs such as buttons, switches, LED's, motors and relays.

Support

Quality

Security

License

Reuse

Support

gpio has a low active ecosystem.

It has 14 star(s) with 3 fork(s). There are 3 watchers for this library.

It had no major release in the last 12 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of gpio is 2.0.2

Quality

gpio has no bugs reported.

Security

gpio has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

gpio is licensed under the GPL-3.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

gpio releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed gpio and discovered the below as its top functions. This is intended to give you an instant insight into gpio implemented functionality, and help decide if they suit your requirements.

Exports a GPIO file .
Read a pin
Set the value of a GPIO input pin .
Clear all GPIO pins
Validate a pin number .
Validate pin type
Write a value to a pin
Set direction of a pin
Create a new pin

Get all kandi verified functions for this library.

gpio Key Features

No Key Features are available at this moment for gpio.

gpio Examples and Code Snippets

GPIO,Example usage

PHP

Lines of Code : 19

License : Strong Copyleft (GPL-3.0)

Copy

use Ballen\GPIO\GPIO;

// Create a new instane of the GPIO class.
$gpio = new GPIO();

// Configure our 'LED' output...
$led = $gpio->pin(18, GPIO::OUT);

// Create a basic loop that runs continuously...
while (true) {
    // Turn the LED on...

GPIO,Tests and coverage

PHP

Lines of Code : 6

License : Strong Copyleft (GPL-3.0)

Copy

# Install the GPIO Library (which will include PHPUnit as part of the require-dev dependencies)
composer install

# Now we run the unit tests (from the root of the project) like so:
./vendor/bin/phpunit

./vendor/bin/phpunit --coverage-html ./report

GPIO,Installation

PHP

Lines of Code : 2

License : Strong Copyleft (GPL-3.0)

Copy

composer require ballen/gpio

composer require ballen/gpio ^1.0

Community Discussions

Trending Discussions on gpio

Python Hall Sensor Monitor - Too High CPU Usage

STM32 SPI communication with HAL

Linux Device Tree: Understanding how a reference to a deleted node works?

Using Gpio on Raspberry Pi 4 B with uno-platform

C++ How do I prevent Memory Protection Violation?

Unable to access BeagleBone Black GPIO

How would I open and run a python program on a raspberry pi from a main python program on a windows pc?

Docker Access to Raspberry Pi GPIO Pins --privileged does not work

Can't modify a cross module variable

Issue with debugging usb using usbmon

QUESTION

Python Hall Sensor Monitor - Too High CPU Usage

Asked 2021-Jun-13 at 15:12

I'm doing a project where I need to monitor several hall sensors for a position encoding. The logic is pretty simple, but the digital signal is fast: it may have up to 350 position changes per second.

I was hoping I could simply write a hall sensor monitor program watching the GPIOs but it appears that these programs consume quite a bit of CPU if I monitor at the necessary frequency. I had hoped suspending the CPU between every poll would help, but it doesn't seem to make much difference.

Here's the polling loop from what I'm currently doing. It "works", but the CPU usage is far too high. I'm running this on a process that shares the "position" variable with other processes on a memory-mapped file.

...

ANSWER

Answered 2021-Jun-13 at 15:12

You're using wrong hardware & software for the job. Jetson Nano can be considered as a full featured PC. As I understand, it's suitable for high level algorithms, image processing and neural network evaluation. Bare metal programming does not make much sense for this kind of devices, hence you have Linux running on it. You need to be aware that in the presence of a non real-time operating system, you can't get reliable delay times.

Reading a quadrature encoder is low level task with strict hard real-time requirements. For this, you need microcontrollers (like PIC, AVR, ARM Cortex M), C/C++, bare-metal programming or an RTOS, and preferably dedicated hardware which is capable of reading quadrature encoders directly.

Polling input pins isn't the correct way of interfacing encoders. Keep it in mind that you need to poll the pins much faster than the expected pulse frequency. In microcontrollers, you use interrupts instead which saves you from polling. Even interrupts can't keep up with high resolution & fast turning encoders. When interrupts don't suffice, you need dedicated encoder interfacing hardware which counts pulses automatically for you.

The best thing you can do is picking a microcontroller and outsourcing the encoder counting job to it. As your encoder resolution is low, you don't need special quadrature interface hardware modules. You can just pick an Arduino and make it count pulses. Then your Jetson Nano can query Arduino using serial port, I2C or SPI to retrieve the up-to-date pulse count.

Source https://stackoverflow.com/questions/67954771

QUESTION

STM32 SPI communication with HAL

Asked 2021-Jun-11 at 11:58

I just started programming a STM32 and generated a code with CubeMX for an SPI communcation with a gyroscope (L3GD20) I have a problem with the HAL_SPI commands.

I first try to read the WHO_AM_I register which return a good response (0xD4) Then I tried to do the same with CTRL_REG1 register and it was still good by returning (0x07).

But if I try to get both of them one after the other, the HAL_SPI_Receive keeps sending the data of the first HAL_SPI_Transmit of the code... Tried to give it other buffers but still didn't work.

Here is the part of the code I'm intersted in :

...

ANSWER

Answered 2021-Jun-11 at 10:26

Since HAL_SPI_Receive is already using HAL_SPI_TransmitReceive (github stm32f4 spi driver) to send dummy data to generate clock, you can use that fact and ditch the HAL_SPI_Transmit, and use the receive function like this:

Source https://stackoverflow.com/questions/67922914

QUESTION

Linux Device Tree: Understanding how a reference to a deleted node works?

Asked 2021-Jun-11 at 10:18

Context

I've taken a look at the device tree that is in use for a working i.MX6 based development board. I've noticed that in the case of the ethernet configuration, a confusing mix of directives are present. Namely:

Node fec1 contains a directive to delete node mdio
Node fec2 contains a reference to node ethphy1
Node ethphy1 is within mdio, the deleted node.

Snippet ...

ANSWER

Answered 2021-Jun-11 at 10:18

TL;DR version

The /delete-node/ mdio; directive is deleting the mdio node that was added in imx6ul-imx6ull-var-som.dtsi or imx6ul-imx6ull-var-dart.dtsi.

Full version

OP pointed to imx6ul-imx6ull-var-som-concerto-board.dtsi as the source of the fragment. That is included by the following:

One of those is included by at least the following, according to their imx6ul, imx6ull, or imx6ulz prefix:

ims6ul:

imx6ull:

imx6ulz:

Those all include one of the following, according to their imx6ul, imx6ull, or imx6ulz prefix:

imx6ul:

imx6ul-var-som.dtsi, which includes imx6ul-imx6ull-var-som.dtsi

imx6ull:

imx6ull-var-som.dtsi, which includes imx6ul-imx6ull-var-som.dtsi

imx6ulz:

imx6ulz-var-som.dtsi, which includes imx6ul-imx6ull-var-dart.dtsi

imx6ul-imx6ull-var-som.dtsi and imx6ul-imx6ull-var-dart.dtsi both contain this section:

Source https://stackoverflow.com/questions/67873645

QUESTION

Using Gpio on Raspberry Pi 4 B with uno-platform

Asked 2021-Jun-09 at 18:16

I realy hope im not the only one having this problem (i deleted my previous Question because it seems kinda missleading so heres my secont attempt)

I try to use the Rasbpery pi 4b GPIO Pins using a Uno app:

my setup:

i tried it before with a consol APP and it works:

Console APP Code:

...

ANSWER

Answered 2021-May-28 at 09:46

As @JérômeLaban answered in the comment:

you can find the solution here: github.com/unoplatform/uno/issues/3813

Source https://stackoverflow.com/questions/67729301

QUESTION

C++ How do I prevent Memory Protection Violation?

Asked 2021-Jun-08 at 10:38

I have a problem with memory violation problem that occurs if reach else if(argc == 2)

I'm trying to have a nice written script with no errors like that, anything else works like a charm...

Here's a code fragment:

...

ANSWER

Answered 2021-Jun-08 at 10:26

I followed @Yksisarvinen advice and reorder the code and now it works flawless:

Source https://stackoverflow.com/questions/67885413

QUESTION

Unable to access BeagleBone Black GPIO

Asked 2021-Jun-08 at 02:22

I have a BeagleBone Black board and I'm using the below-mentioned image file. https://debian.beagleboard.org/images/bone-debian-10.3-iot-armhf-2020-04-06-4gb.img.xz

I aim to operate GPIO pins of this board with the c programming language.

To do so, I've gone through this link: https://beagleboard.org/static/librobotcontrol/installation.html

And after following all the steps according to this link the result I achieved is the same as mentioned in the checking functionality step [the last step] of this document.

Furthermore, I follow this document for c language setup: https://github.com/beagleboard/librobotcontrol/blob/master/docs/src/project_template.dox

and run this source code: https://beagleboard.org/static/librobotcontrol/rc_test_leds_8c-example.html

All these processes were completed without any error.

################################## Now I want to access the GPIO pins of the board. For that, I've prepared a basic code.

Let's take a pin P8_10 / GPIO2[4] for an example. So for that my code will be:

...

ANSWER

Answered 2021-Jun-08 at 02:22

Try config-pin gpio

Source https://stackoverflow.com/questions/67869413

QUESTION

How would I open and run a python program on a raspberry pi from a main python program on a windows pc?

Asked 2021-Jun-07 at 07:58

I am running a main python program on a Windows PC that is hooked to equipment that cannot be ran on an Raspberry pi. At a certain point in the main program, I want to call/execute a Rpi program to run. I need the GPIO pins from the Rpi to turn on a relay/s. Is there a way to wirelessly(or serially) open and run the program on the raspberry pi from the main program already running on the Windows PC?

Maybe I am not thinking of something, is there an easier and just as cheap solution to turn on a relay from the Windows PC program?

Any points in the right direction would be greatly appreciated.

...

ANSWER

Answered 2021-Jun-06 at 15:30

depending on security requirements. Assuming that the Desktop PC and raspberry pi are on the same network, you could create an HTTP REST endpoint on the pi, you could use flask or fastapi for this. then call that from the app running on the desktop. for help with flask see https://flask.palletsprojects.com/en/2.0.x/ if you are familiar with python flask is fairly simple to get started with.

Source https://stackoverflow.com/questions/67860683

QUESTION

Docker Access to Raspberry Pi GPIO Pins --privileged does not work

Asked 2021-Jun-04 at 16:14

I know similar question had already been answered, and I studied dilligently. I believe, I have tried nearly all possible combinations, without success:

...

ANSWER

Answered 2021-Jun-04 at 16:14

You're running commands in the container as appuser, while the device files are owned by root with various group permissions and no world access (crw-rw--- and crw-r-----). Those groups may look off because /etc/groups inside the container won't match the host, and what passes through to the container is the uid/gid, not the user/group name. The app itself appears to expect you are running as root and even suggests sudo. That sudo is not on the docker command itself (though you may need that if your user on the host is not a member of the docker group) but on the process started inside the container:

Source https://stackoverflow.com/questions/67838895

QUESTION

Can't modify a cross module variable

Asked 2021-Jun-01 at 22:34

I’m doing a home project with a raspi and a rain sensor.

Basically, with cronjobs, i run isitraining.py every 30 min.

If it is raining, i want it to increment a specific variable from another module (rains.water)

If it stops raining, i want it to decrease the same variable.

here are my codes:

rains.py

...

ANSWER

Answered 2021-Jun-01 at 22:32

Every time testscript.py runs, it's importing isitraining.py fresh, from scratch, which then imports rains.py fresh, from scratch. rains.py and the water value it holds do not persist across runs.

If you want to save the value, you need to manually write it to disk, then load it later when you want to use it. Something like this:

isitraining.py:

Source https://stackoverflow.com/questions/67796696

QUESTION

Issue with debugging usb using usbmon

Asked 2021-May-31 at 08:09

I am using Linux 4.19.55 armv7l on a omap3 processor. On my target there is a usb modem that gets power from a gpio pin value (defined under /sys/class/gpio). There are occasions when I change the value parameter of this gpio pin to bring down the hardware and while doing so I frequently get an error (thrown by musb_handle_intr_disconnect from inside drivers/usb/musb/musb_core.c ) as under:

"musb_handle_intr_disconnect 843: unhandled DISCONNECT transition (a_idle)"

I tried debugging the issue by mounting debugfs and capturing data from the concerned bus by using usbmon. Bus id is identified from lsusb output and confirmed by observing /sys/kernel/debug/usb/devices. I observe that usbmon is unable to capture data whenever the mentioned error shows up. In a no error scenario the usbmon does capture the traffic from the concerned bus. Please help how to debug this issue.

...

ANSWER

Answered 2021-May-31 at 08:09

Just checked that a commit on kernel branch fixes this issue which is present inside the states handled by the glue layer. This is the required commit

Source https://stackoverflow.com/questions/67470152

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install gpio

The recommended way of installing the latest version of this library is via. Composer; To install using Composer type the following command at the console:.