https://github.com/evan-brass/baremetal-pi

RaspberryPi 3 B+ - Bare Metal Programming
https://github.com/evan-brass/baremetal-pi

Last synced: 16 days ago
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RaspberryPi 3 B+ - Bare Metal Programming

• Host: GitHub
• URL: https://github.com/evan-brass/baremetal-pi
• Owner: evan-brass
• Created: 2019-01-20T18:25:46.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2021-09-09T23:36:36.000Z (about 3 years ago)
• Last Synced: 2024-10-10T19:00:05.632Z (about 1 month ago)
• Language: Assembly
• Size: 7 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# A skeleton baremetal project

## Dependencies

* cargo-binutils: `cargo install cargo-binutils`

	* (required by binutils) `rustup component add llvm-tools-preview`

* ARM64 cross-target: `rustup target add aarch64-unknown-none-softfloat`

## Status

It doesn't do much.  It currently just blinks the green ACT led a few times and outputs "Hello World!" to the console before panicking.  The panic handler outputs the panic message to the console.

The stack issue was resolved.  Current issue: Any atomic memory access fails.  I don't really know what that means.  I haven't setup everything yet.  We still need page tables.  Also, maybe there's some multi cpu setup that needs to happen before being able to use atomics.  I don't know.

## Instructions

### Initial Configuration:

* Add firewall rule for TFTP: UDP 69 inbound

* Add firewall rule for DHCP: UDP 67 inbound

* Configure static ip for eth0: 10.0.0.10 subnet 255.0.0.0

### Development time setup

* Plug in the raspberry pi + power it on:

	* The static ip configuration only takes effect when the computer sees something on eth0.  The DHCP server will ignore eth0 if doesn't have a subnet configuration that matches (eth0 is 169 if no device)

* Start the DHCP server `clear; sudo dhcpd -4 -cf ./dhcp.conf`

* Start the TFTP server `clear; sudo in.tftpd -4 --listen -s tftp-root`

* (optional) Run wireshark `sudo wireshark`

### Development cycle

* run `./make.sh`

* Restart the pi (either unplug / replug or use the reset button)

## Links

* Boot Codes: https://www.raspberrypi.org/documentation/configuration/led_blink_warnings.md

* Network booting: https://metebalci.com/blog/bare-metal-rpi3-network-boot/

* OS dev: https://github.com/rust-embedded/rust-raspberrypi-OS-tutorials

* BCM2837: https://cs140e.sergio.bz/docs/BCM2837-ARM-Peripherals.pdf