Questions tagged [graphics]

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61 views

TMDS Chip fails but Direct Connection to FPGA works

We've been attempting to do some graphics over HDMI using an FPGA. I've built a board that has two HDMI connections. One of these links the required video lines directly to the FPGA. The second HDMI ...
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1answer
41 views

How to Identify my TFT LCD Driver Chip

This is one of my TFT LCD which I have no Technical details. How can I find which driver chip they have used? I have previously interfaced TFT based on RA8875 driver. So I Have a basic idea. I have ...
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1answer
44 views

Graphic cards/components reliability after crypto minning

In the near future we will be probably flooded with graphic cards they were used for crypto mining. There are many not very well-founded discussions about their reliability. And similarly many un-...
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1answer
221 views

How to draw sprites using DMA2D with transparency using stm32?

I am using STM32F429I-Discovery board I want to draw sprites on TFT-LCD with transparency on top of background image , I used black color as the transparent color for the images that I want to draw ...
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1answer
106 views

Could a PC consume more power from the plug if it oparates in a colder enviroment?

I have a mining rig (computer using its processing power to calculate hashes in order to eventually be rewarded with cryptocurrency tokens.) The program I use to mine tells me each time the power ...
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2answers
68 views

MOSFET repair 4901 or 4901NF

I'm from Germany and im not so good in English, please forgive me. I have a little bit idea of electronics but I'm not so sure with this problem. I would like to say beforehand that I have a soldering ...
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21 views

Applying voltages to conductors in a passive-matrix LCD

In the picture the horizontal and vertical lines are the conductors and the intersections are the pixel positions I want to turn off the pixels which I've filled So for that I've to apply an electric ...
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1answer
87 views

Why refresh rate is needed in a passive-matrix LCD

In a passive-matrix LCD we have horizontal and vertical conductors. The intersection points are pixels which are cells of liquid crystal molecules. For drawing a frame, we provide the necessary ...
2
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1answer
304 views

Are all pixels addressed simultaneously in one frame?

In computer screens, is every pixel turned on during one frame? How can you address millions of pixels at the same time? Or is it like in CRT where it is scanned left to right, top to bottom?
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2answers
293 views

8 bit PC integrated with VGA video card (similar to ben eater project)

I'm thinking about making a project like this one and add a graphics card like that one. Using an EEPROM for the video memory and changing its content setting it in write mode and assigning a value ...
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79 views

Resistor, Inductor or something else?

I'm trying to identify a component marked simply as "R". There are two of these on a graphics card I am trying to fix that has a power issue. Thanks for any help...
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1answer
32 views

Swapping a step down converter

I have a faulty graphics card i am trying to repair, i noticed on the back near the 12v connector that a step down converter in Q501 had a leg missing (right side, second from the bottom) and i am not ...
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64 views

What would cause streaking in graphics LCD display?

I am using a 128x64 graphic LCD module that uses either NJU6676 or ST7565P similar to this Zettler module. I am getting vertical streaks as pictured. They appear to be most pronounced when the topmost ...
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1answer
59 views

Which would be cost effective, a display with graphics controller or without graphics controller?

I am working on a touch screen display on stm32. I found some evaluation boards like mikromedia-7-stm32f7 and stm32h753i-eval Mikroelectronica uses the external controller SSD1963, although the MCU ...
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2answers
281 views

What does it means that a MCU has support for OpenGL?

I am trying to understand the meaning of when someone says that PowerPC 7410 CPU has support for OpenGL based software. Does it mean that there are any specific instruction in its ISA architecture ...
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3answers
4k views

Can it be proven that running a GPU at high temps is bad for the card?

If you continuously run your graphics card at between 80°C and 90°C (176°F and 194°F) is it actually bad for the graphics card? I.e. does it reduce the life of the card? Can this be proven? Or is it ...
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0answers
828 views

How to rotate a square on a TFT ILI9486 screen with Arduino

Problem Summary I have a “square” rotating on my 3.5 Inch TFT screen (ILI9486 driver) with dots/circles at each of its 4 corners. It is connected to an Arduino MEGA 2560 There are a few issues with ...
32
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5answers
14k views

How do devices like the Game Boy Advance achieve their frame rate?

I've been designing my own handheld gaming device based around an AVR microcontroller and a small OLED display. I started off with a monochrome display 128x64 pixels and can comfortably draw to it at ...
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2answers
90 views

is the intel quark capable of running an opencv webcam unity application for linux? [closed]

I built a fairly simple application in Unity that uses a webcam and opencv to overlay graphics in realtime to a user's face. I am looking for a low cost microcontroller/computer to run the ...
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1answer
148 views

Simplest display for homemade 8080 based computer-what to use? [closed]

I'm designing a 8080 processor based computer and I want it to be able to at least output something visually. I have thought about using SMD LED matrix made by myself, but even with the 160 x 120 px ...
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1answer
831 views

So there was an ant that somehow got inside my screen. How do I remove it? [closed]

Wondering if it's possible to remove the LCD screen without damaging it. I noticed there are six black metal thingys at the back of the module that is twisted up holding the LCD in-place, is it safe ...
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1answer
101 views

What kind of software I can use to plot graphics like this? And how is this plotted? [closed]

I am trying to plot the transfer function of a circuit. What kind of software I can use to plot graphics like this, without using circuit simulation software? I would like to understand things ...
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2answers
268 views

Drawing bitmap fast on ARM Cotex

I'm trying to blit an image with sprites, animated. While drawing the animated sprite, I draw a background before the sprites. With the sprites, the game looks smooth and playable, with the background ...
2
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1answer
735 views

Drawing a bitmap using 2D DMA on STMF32F4

I'm trying to draw a bitmap using 2D DMA, so I have the address of the destination which is the front buffer, and then I read a line from the bitmap, blit it using the 2D DMA.. I get scanlines, and ...
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1answer
1k views

LTDC STMF32 Double buffering problem

I'm trying to do double buffering using the hardware, STMF32492I.. so first I'm initalizing two layers in two different addresses. Then I write to the back buffer, switch the back buffer.. But The ...
5
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2answers
877 views

16 bit Graphics Chip [closed]

I am trying to build a 16 bit single board computer based around the 68000 and am wondering if there are any non proprietary 16 bit graphics chips like the Yamaha V9958 with readily available ...
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2answers
960 views

How to connect a frame buffer to an LCD monitor through DisplayPort or DVI in an integrated system

I would first like to state that I am primarily a software engineer. While I have spent 14ish hours researching this so far, I apologize in advance if I miss a core concept or use incorrect ...
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2answers
902 views

Why does the ssd1306 OLED controller have an unusual memory layout?

I've recently ported a driver for the ssd1306 OLED controller. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf http://www.ebay.co.uk/itm/0-96-inch-128x64-I2C-Interface-White-Color-OLED-Display-...
63
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3answers
8k views

How does my screen driver handle so much data?

I just did some quick calculations: On my MacBook I have a resolution of 2560x1440 multiplied by 24 Bit for colors we get 11.05MB for a single picture or 663MB per second at 60 fps. I guess there is ...
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1answer
598 views

What is the proper way to store data into a frame buffer?

I am trying to plan a graphics processor project that will only render lines. It will use the bresenhmam's line algorithm. After reading on the algorithm, it makes sense how it works to calculate ...
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1answer
2k views

SMD Ceramic capacitor burned [closed]

To begin with i have an AMD Sapphire Radeon R9 270 and it worked fine for a year and a half. I was doing some cleaning on my pc (cleaning the heatsinks and things like that) and when i connected ...
6
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1answer
576 views

LCD driver: What changes in 3-D mode?

Facts: We know that a system needs high data transfer speed if it works with +120 Hz refresh rate and +1080p resolution(This mostly requires DVI dual link). We know that in a 3-D system with shutter, ...
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2answers
609 views

Interfacing with a graphic lcd

I am ordering a graphic lcd NHD‐12864AZ‐FL‐YBW and most of the interface code seems pretty simple. On the datasheet it has the following list of commands I don't understand what is put in the write ...
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3answers
1k views

8 bit computer graphics [closed]

I'm working on learning how 8 bit computers work and operate. I know you can make a (tedious) microprocessor with a larg amount of logic gates and such, but how does it read graphics? I know this uses ...
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2answers
458 views

What tasks does Graphics hardware perform and what steps does it follow to do so

I am not intending to go into high end GPUs here. That is too advanced. What tasks does a basic graphics hardward perform? By basic perhaps we can go back in time and see what it did in the early days ...