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PiOS

My experimental bare metal OS for the raspberry pi. This file is used to track its current state and what I'm currently working on.

What it does right now:

  • GPIO - Example: Flash LED
  • Framebuffer - Drawing pixels
  • Terminal - Character based display
  • System Timer
  • Interrupts
  • MMU
  • eMMC reading/writing
  • Fat32 - Small subset (read-only)
  • Loading and executing binaries (ELFs)
  • UART and MiniUart send/receive (interrupt based receive)
  • Virtual memory (high memory kernel, Low memory user)
  • Stacktraces on faults

What I'm planning to do / working on:

  • Multitasking
  • Fat32 - Writing
  • Audio
  • Support for addition file systems: SFS, EXT2(?)

Build requirements:

Building:

Just clone the repository and run make in the root directory

Branches:

master

Latest and greatest, not guaranteed to be stable.

0.01
  • Simple terminal
  • Framebuffer
  • Keyboard input (using Chadderz usb driver)
0.10

Essentially started over, removed USB driver (I intend to write my own).

  • UART
  • Terminal output
  • Interrupt handling
  • Emmc driver
  • Mailbox
  • MMU
  • Timer
  • Reading elf
  • Stack trace with function names
  • Very crude multitasking (Multiple processes, each with one main thread)

pios's People

Contributors

simongustavsson avatar

Watchers

James Cloos avatar Jeremy Weasley avatar

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