42 lines
2 KiB
TypeScript
42 lines
2 KiB
TypeScript
import adAstraWebP from '../static/media/ad_astra.jpg?format=webp';
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import adAstraJpeg from '../static/media/ad_astra.jpg?format=jpg';
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import adAstraMp4 from '../static/media/mp4/ad_astra.mp4';
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import adAstraWebM from '../static/media/webm/ad_astra.webm';
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import { GitHub } from './shared';
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import { Video } from '../page/basics/video/video';
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export const adAstraTimelineElement = {
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title: `Gaming on an ATtiny85`,
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date: `2020 spring`,
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figure: new Video({
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posterWebP: adAstraWebP,
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posterJpeg: adAstraJpeg,
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mp4: adAstraMp4,
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webm: adAstraWebM,
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}),
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description: `
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A simple game engine with a sample game set in space. The greatest challenge was to overcome
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the very limited resources of the hardware, this was also the most rewarding part.
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`,
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more: [
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`
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For reducing complexity while maintaining performance, a balance had to be found between object-oriented
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and structural programming. For example, a simple prototype-based inheritance is used for the game objects;
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meanwhile, an optimised SIMD utilising low-level driver is used for rendering to the display.
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I think, the codebase is quite readable and at the same time also fast, with the maximum frame times
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being between 15 and 20 milliseconds at a clock speed of 8 MHz. That means, it runs quite stably at 50-60 FPS.
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`,
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`
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As for the hardware, it is quite simple. Aside from the ATtiny85V, a D096-12864-SPI7 display is used for
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output and a TSOP4838 for input. The circuit runs on 3.3V, so a regulator is also needed. It uses a current
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of 8mA to 11mA on full brightness and around 1.5mA on standby mode.
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`,
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`
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There is also fault-tolerant persistent data storage utilising the built-in EEPROM.
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For creating sprites (which are also stored in EEPROM), I made a tool to convert PNG-s into C array definitions.
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This can also be found on GitHub along with the entire project.
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`,
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],
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links: [new GitHub('https://github.com/schmelczerandras/ad_astra')],
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};
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