Low Byte Productions
@lowbyteprod
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In depth, low level videos by @fstokesman
Joined July 2019
๐๐๐ง๐๐๐ซ๐ข๐ง๐ ๐๐ ๐๐ซ๐๐ฉ๐ก๐ข๐๐ฌ ๐๐ง ๐๐ง ๐๐ฌ๐๐ข๐ฅ๐ฅ๐จ๐ฌ๐๐จ๐ฉ๐. In this video, we're taking a deep-dive into drawing graphics on an oscilloscope, using an STM32 microcontroller generating some very special signals!.
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What do you do when you don't have an FPU, but you need to compute with fractional precision?. You use fixed point!. Join as we dive into this formats fascinating representation, and the core operations.
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RT @fstokesman: ๐๐๐ฒ๐ฟ๐๐๐ต๐ถ๐ป๐ด ๐ ๐๐ป๐ผ๐ ๐๐ฏ๐ผ๐๐ ๐ง๐ต๐ฒ ๐๐ฎ๐๐ ๐๐ป๐๐ฒ๐ฟ๐๐ฒ ๐ฆ๐พ๐๐ฎ๐ฟ๐ฒ ๐ฅ๐ผ๐ผ๐ ๐๐น๐ด๐ผ๐ฟ๐ถ๐๐ต๐บ. This algorithm computes 1/sqrt(x) with a bewildering handfuโฆ.
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RT @fstokesman: This is a thread about the CORDIC algorithm, and why it's been living rent-free in my brain for the last couple of weeks ๐งตโฆ.
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RT @MicroarchClub: 10: Thomas Sohmers. @trsohmers joins to discuss dropping out of high school at age 17 to start a chip company, lessons fโฆ.
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In this video, we're looking at a technique for precisely analyzing signals from firmware when all you can do is blink a LED.
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In this video, we examine the WS2812B RGB LED device - commonly referred to as a NeoPixel, and write a bit-banged driver from scratch for an STM32 microcontroller.
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Today we're diving into Linux internals - figuring out how to dump memory from another process!. We talk about the why the /proc filesystem is so cool, as well as the ptrace system call, and end up building our own program to peek into private processes!.
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RT @matthewvenn: Another great #makernews newsletter is out! With contributions from @bekathwia @MAYERMAKES @MrBananas @Bleeptrack @lowbyteโฆ.
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We're back reading xv6 Operating System code this week!. Our focus today is understanding virtual memory and address translation; A fascinating topic that is essential for keeping user processes isolated from each other.
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This week we're exploring graphics, processing an image into a series of animated waves!. The math behind it leads us into to how sine waves work, the magic of linear interpolation, and signal processing techniques like amplitude modulation!.
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OS Source Diving!. This week, we're back in the xv6 operating system understanding how the physical page allocator works in detail. It's a beautiful algorithm that manages to be both simple and hard to wrap your mind around at the same time.
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RT @tvii: The tech youtube gem of this autumn:. Walking through the source code of xv6 OS, starting with โHow the OS bootsโ .
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RT @Cyber_serker: For those enjoying Source Dive @lowbyteprod's playlist, I found a similar one explaining xv6 kernel concepts, but this tiโฆ.
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This series introduces, describes, and explains "xv6", which is a simple Unix operating system. We look at the overall design and walk through the C code. Th...
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More OS source code deep diving this week!. We're looking at how xv6 layers drivers, devices, and high level functions like printf(). If you've ever wondered how strings get printed, from the formatting to the hardware, look no further!.
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Painting Programmatically ๐๏ธ๐ค. This week we're exercising our creative outlets -- using our coding skills and a sprinkle of math to generate some beautiful imagery!.
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In case you missed it, part two of our deep dive into the source of the xv6 operating system, is already online!.
Continuing our journey of levelling up by reading source code of open source projects, we're diving back into xv6, a pedagogical operating system written in C. Spinlocks are a mechanism used by the OS to limit resource access to one CPU core at a time.
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