blinky | Exploring peripheral vision in games

by shaunlebron C Version: 1.4 License: MIT

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

kandi X-RAY | blinky Summary

blinky is a C library. blinky has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Proof of concept to put peripheral vision into games (without VR goggles). Explore this interesting space by playing the Quake demo with fisheyes, panoramas, and cartographic projections. (See also: Using with full version of Quake). Why? The standard projection used in all games was never intended for wide-angle views, whereas the Panini projection was invented to be the best representation of your natural ~170º wide vision. How? To use non-standard projections like Panini, Blinky first snaps multiple pictures around you to form a Globe of pixels. Then it projects all those pixels to the screen using a Lens. You can enable a Rubix grid if you wish to visualize the mapping. (Quincuncial projection shown below). Try it: Blinky has shortcut keys for quickly trying several Globes and Lenses. If you want more control, use the console commands or even edit/create your own globes and lenses with Lua scripts. 360º vision: Blinky has many fisheye and panoramic lenses from photography, but it also has many map projections from cartography that will give you a full 360º view. Performance vs Quality: Blinky has to render 6 views per frame when using a Cube globe. So we provide lower poly globes as a way to balance quality and performance. Fewer renders means each view has to cover more area with less resolution.

Support

Quality

Security

License

Reuse

Support

blinky has a low active ecosystem.

It has 618 star(s) with 25 fork(s). There are 35 watchers for this library.

It had no major release in the last 12 months.

There are 4 open issues and 79 have been closed. On average issues are closed in 592 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of blinky is 1.4

Quality

blinky has no bugs reported.

Security

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

License

blinky is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

blinky releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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blinky Key Features

No Key Features are available at this moment for blinky.

blinky Examples and Code Snippets

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Community Discussions

Trending Discussions on blinky

Using Rust crates for an STM32 microcontroller board

rust msp430 linker error - .text is not within region ROM

STM32 Reset issues

Cannot detect collision for objects drawn in canvas javascript

Assertion Failed: The toolchain is unable to build a dummy C file

STM32F4-Disc1: user defined software delay in keil MDK version 5 not working

Zephyr cmake error `string sub-command REGEX, mode MATCH needs at least 5 arguments total to command.`

Why does IntelliSense say it cannot find DDRB definition when I added it to json and it can even let me peek the definition? Visual Studio Code

_delay_ms seems not to work when using pwm

STM-Link on Nucleo Board Not Enumerating

QUESTION

Using Rust crates for an STM32 microcontroller board

Asked 2021-May-29 at 19:34

I'm currently trying to learn Rust (for embedded specifically), coming from a background of C for embedded systems and Python. So far, I've been reading Rust Programming Language and Rust for Embedded, and read a few blog posts on the web.

I want my first project to be a simple "Blinky", where an LED blinks infinitely. I've got an STM32L152CDISCOVERY board with an STM32L152 chip in it (basically same as STM32L151), which is a Cortex M3.

Instead of implementing everything from scratch, I want to leverage existing crates and HALs. I've found two that seem promising: stm32l1 and stm32l1xx-hal. I've tried to read the documentation of each of them and also part of the source code, but I still can't figure out how to use them correctly.

Got a few questions about Rust and about the crates:

I see that stm32l1xx-hal has a dependency on stm32l1. Do I need to add both as a dependency in my Cargo.toml file? Or will that create problems related to ownership?
Is this the correct way to add them? Why is the second one added like that [dependencies.stm32l1]?
...

ANSWER

Answered 2021-May-29 at 19:32

I got some help from a Discord community. The answers were (modified a bit by me):

stm32l1xx-hal already depends on stm32l1 as seen here. There's no need to import it twice. It is enough to add to Cargo.toml:

Source https://stackoverflow.com/questions/67654351

QUESTION

rust msp430 linker error - .text is not within region ROM

Asked 2021-Mar-26 at 09:21

I am working on an embedded rust project using msp430 controllers (MSP430G2553 - LaunchPad).

I have boilerplate code up and running from the msp430 quickstart repo

However, for my project, I need to run hmac, so I found a no_std compatible crate. I have tried roughly 10 other crates as well without luck.

I believe I need to specify some flags for the linker, but I do not know which I am missing. I currently have rust the following rustflag set in .cargo/config:

...

ANSWER

Answered 2021-Mar-17 at 13:05

It seems that you are linking to the wrong memory spec file. I would recommend to ensure that this file exists link-arg=-Tlink.x, otherwise switch it to the correct file.

Rust embedded named their memory file memory.x, and I assume have followed the steps. So changing the flag to link-arg=-Tmemory.xshould fix it.

Source https://stackoverflow.com/questions/66669150

QUESTION

STM32 Reset issues

Asked 2021-Feb-09 at 19:41

I've programmed my STM32F401 in C and Rust but am having a problem with assembly.

When I initially load the code with a Black Magic Probe, it runs fine
When my board powers up or is reset, the code doesn't run.
After reset, in GDB, if I try to Continue it, it throws an exception.
After reset, in GDB, if I try to Run it, it runs fine

The actual code in the reset handler is the perennial "blinky". I'm sure there's no problem with the code, this "smells" of some kind of "initialisation issue"?

I'm a massive GDB noob, but if I do info registers, PC is always the value I'd expect - 0x8000198

...

ANSWER

Answered 2021-Feb-09 at 19:41

 8000004:   08000198    .word   0x08000198

Source https://stackoverflow.com/questions/66125552

QUESTION

Cannot detect collision for objects drawn in canvas javascript

Asked 2021-Jan-26 at 12:56

Hey I am currently building a simple pacman in javascript as a learning project. I am able to render a basic board, pacman, pellets and big pellets with basic canvas drawings (arc etc) . The game is responsive to key codes moving pacman around but Imstruggling when I want to test for collision and access x and y values of canvas drawings. My board is drawn in for loop that iterates through a layout/grid 2d array of numbers and draws something different depending on the number, 0 representing walls, 1 - pellets etc. I feel I may be making an error in the drawBoard for loop also.. I have started to go back and forth between using a function to draw walls and then trying to access its X and Y positions:

...

ANSWER

Answered 2021-Jan-26 at 12:56

In pacman collision can be oversimplified by just using an array and checking wether the current case where pacman is contains something or not, if so make him return to previous position.

Source https://stackoverflow.com/questions/65891139

QUESTION

Assertion Failed: The toolchain is unable to build a dummy C file

Asked 2020-Nov-27 at 15:22

A number of students + myself have been attempting to set up a Zephyr RTOS build environment under Windows 10, to build applications that target various ARM Cortex M boards. We have each followed the Zephyr "Getting Started Guide" and ran into the same problem. When compiling for a number of different boards (let's just use the nrf52840dk_nrf52840 as an example here) we get this error:

Error Message

...

ANSWER

Answered 2020-Nov-25 at 01:01

After some digging and receiving help from others in the zephyr-rtos slack channel, I have found others experiencing the same problem, so I'll post my fix here in the hope that it solves other people's issues as well.

The fix is twofold:

You must downgrade from CMake 3.19. Most before this work, but 3.17.2 was the recommended version. If you're using windows, this can be done with the chocolatey command: choco install cmake --installargs 'ADD_CMAKE_TO_PATH=System' --version 3.17.2 --allow-downgrade --force.
You must remove the .cache folder. Your previous build output tells you where this will be stored. The line starts with like: "-- Cache files will be written too: ..."

I still don't know why this error gets thrown, or what should be done to fix it permanently, but this is a fix for now.

Source https://stackoverflow.com/questions/64985685

QUESTION

STM32F4-Disc1: user defined software delay in keil MDK version 5 not working

Asked 2020-Jul-01 at 16:48

I am getting into learning embedded systems and I tried to implement blinky but the software delay gets skipped for some reason. I was expecting it to blink when I am pushing the button but instead the LEDs kept on.

Code I have used is shown below,

...

ANSWER

Answered 2020-Jun-30 at 13:07

Either specify -O0 as optimization flag in the compiler settings to avoid that the useless loop (from the compiler point of view) is optimized away. Alternatively check the MDK or BSP for a provided delay() function known to work.

Source https://stackoverflow.com/questions/62656384

QUESTION

Zephyr cmake error `string sub-command REGEX, mode MATCH needs at least 5 arguments total to command.`

Asked 2020-Jun-18 at 09:35

Hi I'm trying to run the getting started guide, but I'm having issues, I'm currently on the zephyr directory and I want to run the example, so I try west build -p auto -b qemu_x86 samples/basic/blinky but it gives instead

...

ANSWER

Answered 2020-Jun-18 at 09:35

The error is caused by an outdated DTC version. Either update or use the one in the SDK installation:

Source https://stackoverflow.com/questions/62292481

QUESTION

Why does IntelliSense say it cannot find DDRB definition when I added it to json and it can even let me peek the definition? Visual Studio Code

Asked 2020-Jun-13 at 12:26

I have this simply blinky.c code for AVR microcontrollers. It compiles and run no problem. But Intellisense in my vscode is going kinda crazy

...

ANSWER

Answered 2020-Jun-13 at 12:26

Okay, I found a solution. It is caused by the internals of the avr/io.h files. It includes a certain file with definitions based on #define of a given microcontroller in the source code. So when I do not specify the controller it won't #include it in io.h therefor it is not visible to IntelliSense, but compilation can see it because I specify it. So in order to make io.h include definitions we need. We have to tell it which controller we will be using. Like that:

Source https://stackoverflow.com/questions/62359478

QUESTION

_delay_ms seems not to work when using pwm

Asked 2020-May-04 at 09:56

I'm relatively new to programming microcontrollers, so I started experimenting on an ATtiny85.

First program was simply turning on an LED and off with a little delay (classic blinky program).

Now I wanted to slowly increase the brightness of the LED. Here is the code:

...

ANSWER

Answered 2020-May-01 at 18:12

__delay_ms() is converted to cycle-wasting instructions by the compiler, so as long as your F_CPU matches the current speed of the processor, then it should work as expected.

I would look for other places in your code that are not working as you expect them to.

A half second delay at power up is not a great diagnostic test since it happens quickly, only once, and there may be other things going on then as well.

Maybe instead try blinking between two different brightness levels with a 500ms delay between. Visually this should be unambiguous.

if that works as expected, then maybe try doing a brightness ramp and changing the delay inside the loop to see if that works as expected.

Eventually you will work your way up to something that is not as expected, and then you will know where the problem is. It is still possible you will not understand what is going on, but at least you will be able to ask a much more specific question here and be more likely to get a helpful answer.

Report back with your results!

Source https://stackoverflow.com/questions/61547827

QUESTION

STM-Link on Nucleo Board Not Enumerating

Asked 2020-Mar-23 at 23:07

I have two nucleo boards (F4339ZI and F303K8) and neither of them show up as USB devices when I plug them into a computer via the USB port (CN1 - the USB micro port on the ST-Link, not the USB port for the board itself).

I have tried multiple host USB ports, with and without a USB hub, across two different computers, one running OS X and one running Linux. I have tried at least 6 different cables. The OSX machine is using a USB-C to USB-A converter (if that's the correct terminology). The Linux machine has USB-A ports.

In no case does the device show up using lsusb under Linux or system_profiler SPUSBDataType under OSX. Needless to say STM32CubeIDE and st-info can't see the boards. Other USB devices are functional.

The COM LED is slow blinking red which the manual (https://www.st.com/resource/en/user_manual/dm00244518-stm32-nucleo144-boards-stmicroelectronics.pdf) says means USB enumeration hasn't completed (matching what is seen from the OS level).

The boards successfully run their factory supplied blink programs when powered on. I have tried (with the F4395I) moving JP3 to VIN so the board doesn't power up which should just leave the ST-Link running - still no enumeration though.

I tried connecting to a USB charger with JP1 off (and JP3 on U5V) and the board powers up and blinky runs. The manual referenced above says:

In case the board is powered by a USB charger, there is no USB enumeration, so the green LED LD6 stays in OFF state permanently and the target STM32 is not powered.

But everything works for me - LD6 goes a steady green as it does when connected to a computer.

Given it happens with multiple computers, OSs, cables and Nucleo boards I assume the error lies with me, the common factor in all the tests. This is my first use of Nucleo boards so I may well have a mis-assumption.

...

ANSWER

Answered 2020-Mar-23 at 23:07

Out of frustration and lacking anything else to try I dug up every micro USB cable I could find. One had chokes on each end and magically, using that cable, everything just works as expected.

Can it be that I have at least 10 broken USB cables? I don't have an easy way to test them but I guess they might not have the data lines wired to save cost if manufacturers assumed people would only charge phones with them. I don't recall where they all came from...they have just accumulated in a box of USB cables.

Perhaps the Nucleo board sensitive to some horrible interference floating around my room?

Sorry for the noise! Broken cable was genuinely one of the things I suspected - but not 6 of them...

Source https://stackoverflow.com/questions/60793948

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