Roberto

Home router implemented from scratch using STM32 microcontroller and ENC28J60 ethernet interface boards in the C language.

Goals

• Experimenting in bare-metal programming and microcontrollers
• Deep-dive into switching, routing and other networking aspects
• Experimenting with developing OS features but in a more natural way
• Creating and maintaining a larger C codebase that requires more design work

Roadmap

Note: The roadmap is user-feature oriented and the OS features will be built througout the process as needed.

MVPs

• Hardware drivers
• Repeater logic (2 controllers)
• Switching without MAC table
• Switching
• Routing & LAN

Additional features

(in no particular order)

• DHCP
• NAT
• Firewall
• WLAN
• Gigabit Ethernet

Installation

for Ubuntu:

sudo apt install gcc-arm-none-eabi stlink-tools cmake

TODOs

• Hardware drivers

  • Use defines instead of union/structs for enc registers in driver.
  • Remove addr arg from transmit packet in enc driver.
  • Return all errors from enc driver and mask them outside.
  • Rewrite spi write/read to be more high level to ensure read buffer is always cleaned up and support buffers.

• Repeater logic (2 controllers)

  • Add another controller to loop.
  • Add internal packet buffer.
  • Make enc driver non-blocking using DMA so the 2 controllers can work in parallel.