External Documentation & Resources

This page provides links to external documentation, resources, and references that are helpful for working with Calculinux, the PicoCalc, and related technologies.

Official Project Resources

Calculinux

Resource	URL	Description
Main Repository	github.com/Calculinux/meta-calculinux	Yocto layer and build system
Documentation	github.com/Calculinux/docs	This documentation source
Meta Layer	github.com/Calculinux/meta-calculinux	Main Yocto meta-layer

ClockworkPi / PicoCalc

Resource	URL	Description
Official Website	clockworkpi.com	Manufacturer website
PicoCalc Forum	forum.clockworkpi.com/c/picocalc/31	Official forum category
Luckfox Thread	forum thread	Original port discussion

Luckfox

Resource	URL	Description
Official Website	luckfox.com	Manufacturer website
Pico SDK	github.com/LuckfoxTECH/luckfox-pico	Official SDK (Buildroot)
Wiki	wiki.luckfox.com	Documentation

Build System Documentation

Yocto Project

Resource	URL	Description
Main Website	yoctoproject.org	Official Yocto site
Documentation	docs.yoctoproject.org	Complete documentation
Quick Start	Quick Build Guide	Getting started
Mega-Manual	Mega-Manual	All-in-one reference
Dev Manual	Developer Manual	Development guide
Kernel Manual	Kernel Dev Manual	Kernel development
Board Support	BSP Guide	BSP creation

OpenEmbedded

Resource	URL	Description
Main Website	openembedded.org	Project homepage
Layer Index	layers.openembedded.org	Find layers/recipes
User Manual	OE User Manual	Usage guide

BitBake

Resource	URL	Description
Documentation	BitBake Manual	Build engine docs
Syntax Reference	Syntax Guide	Recipe syntax

Hardware Documentation

Rockchip RV1106

Resource	URL	Description
SDK	github.com/rockchip-linux	Rockchip Linux repos
Kernel	Rockchip Kernel	Kernel source
Documentation	Rockchip Wiki	Chip documentation (when available)

ARM Cortex-A7

Resource	URL	Description
ARM Developer	developer.arm.com	Processor documentation
Technical Manual	ARM Documentation	TRM

Linux Kernel Resources

General Linux Development

Resource	URL	Description
Kernel.org	kernel.org	Official kernel source
Documentation	kernel.org/doc	Kernel documentation
Device Tree	devicetree.org	DT specification
Linux Driver Project	ldp.net	Driver development

ARM Linux

Resource	URL	Description
ARM Linux	arm.linux.org.uk	ARM-specific info
Device Tree Guide	DT for ARM	ARM DT bindings

Display & Input

SPI LCD (ST7789)

Resource	URL	Description
Datasheet	ST7789V Datasheet	Display controller specs
Linux Driver	fbtft	Framebuffer drivers
Documentation	Kernel fbdev	Framebuffer docs

Input Subsystem

Resource	URL	Description
Input Docs	Kernel Input	Input subsystem
Event Codes	input-event-codes.h	Key definitions

Development Tools

Cross-Compilation

Resource	URL	Description
Crosstool-NG	crosstool-ng.github.io	Toolchain builder
ARM Toolchains	ARM GNU	Official toolchains

Debugging

Resource	URL	Description
GDB	gnu.org/software/gdb	GNU debugger
OpenOCD	openocd.org	On-chip debugging
JTAG Info	Various	Hardware debugging

Version Control

Resource	URL	Description
Git	git-scm.com	Version control
Git Book	Git Pro Book	Comprehensive guide

Linux Distribution Resources

Package Management

Resource	URL	Description
opkg	opkg docs	Package manager
Package Feeds	Configured in Calculinux	Software repositories

System Management

Resource	URL	Description
systemd	systemd.io	Init system
systemd Docs	freedesktop.org	Complete manual

Desktop Environments

Future Feature

Desktop environments are not currently implemented in Calculinux. These resources are provided for future reference if GUI support is added.

Lightweight Options

Resource	URL	Description
LXDE	lxde.org	Lightweight desktop
XFCE	xfce.org	Feature-rich lightweight
i3	i3wm.org	Tiling window manager
Openbox	openbox.org	Minimal WM

Display Servers

Resource	URL	Description
X.Org	x.org	X11 server
Wayland	wayland.freedesktop.org	Modern display protocol

Programming Languages

C/C++

Resource	URL	Description
GCC	gcc.gnu.org	GNU compiler
C++ Reference	cppreference.com	Language reference

Python

Resource	URL	Description
Python.org	python.org	Official Python
PyPI	pypi.org	Package index

Shell Scripting

Resource	URL	Description
Bash Guide	gnu.org/software/bash	Bash manual
ShellCheck	shellcheck.net	Script analysis

Community & Learning

Forums & Discussion

Resource	URL	Description
ClockworkPi Forum	forum.clockworkpi.com	Official forums
Yocto Mailing Lists	yoctoproject.org/community	Yocto community
Stack Overflow	stackoverflow.com	Q&A site
Reddit /r/embedded	reddit.com/r/embedded	Embedded Linux

Learning Resources

Resource	URL	Description
Linux From Scratch	linuxfromscratch.org	Build Linux from source
Embedded Linux Wiki	elinux.org	Embedded Linux info
Free Electrons	bootlin.com	Training materials

Video Tutorials

Resource	URL	Description
YouTube Search	"Yocto Project Tutorial"	Video tutorials
YouTube Search	"Embedded Linux"	General embedded info
Original Video	Luckfox on PicoCalc	Hardware demo

Datasheets & Specifications

Obtaining Datasheets

Many datasheets require registration or NDA:

• Rockchip: Contact for RV1106 documentation
• LCD Controllers: Search by part number
• Component Vendors: Check manufacturer websites

Useful Specifications

Specification	Description
SPI	Serial Peripheral Interface standard
I2C	Inter-Integrated Circuit bus
USB 2.0	USB specification
MIPI CSI	Camera Serial Interface

Related Projects

Similar Devices

Project	URL	Description
PocketCHIP	Archived	Similar pocket computer
GameShell	ClockworkPi	Gaming handheld
DevTerm	ClockworkPi	Portable terminal

Embedded Linux Distributions

Distribution	URL	Focus
Buildroot	buildroot.org	Lightweight builds
OpenWrt	openwrt.org	Router focus
Raspberry Pi OS	raspberrypi.com	RPi optimized

Books

Recommended Reading

Embedded Linux: - "Mastering Embedded Linux Programming" - Chris Simmonds - "Embedded Linux Primer" - Christopher Hallinan - "Building Embedded Linux Systems" - Karim Yaghmour

Yocto/OpenEmbedded: - "Embedded Linux Development Using Yocto Project" - Otavio Salvador - "Yocto for Raspberry Pi" - Pierre-Jean Texier

Kernel Development: - "Linux Device Drivers" - Corbet, Rubini, Kroah-Hartman - "Linux Kernel Development" - Robert Love

General Linux: - "The Linux Command Line" - William Shotts - "How Linux Works" - Brian Ward

Online Courses

Free Courses

• Yocto Project Training (bootlin.com)
• Embedded Linux Courses (various MOOCs)
• ARM University Program (free materials)

Paid Courses

• Linux Foundation courses
• Udemy embedded Linux courses
• Professional training companies

Tools & Utilities

Online Tools

Tool	URL	Purpose
Device Tree Compiler	devicetree.org	DT compilation
Regex Tester	regex101.com	Pattern testing
Color Picker	Various	GUI development

Software Tools

• Etcher: balena.io/etcher - Image flashing
• PuTTY: putty.org - Serial terminal
• VS Code: code.visualstudio.com - Editor

Standards & Specifications

Standard	Organization	Relevance
POSIX	IEEE	Unix standards
FHS	Linux Foundation	Filesystem hierarchy
LSB	Linux Foundation	Linux standards

Contributing Resources

See Contributing Guide for Calculinux-specific guidelines.

General Open Source

Resource	URL	Description
Open Source Guide	opensource.guide	Contributing basics
How to Contribute	GitHub guides	PR workflow
Code of Conduct	Various	Community standards

Stay Updated

News Sources

• Phoronix - Linux hardware news
• LWN.net - Linux Weekly News
• Hacker News - Tech discussions
• r/linux - Linux subreddit

Blogs

• Yocto Project Blog
• ClockworkPi Blog
• Embedded Linux blogs (various)

Need More Help?

Can't find what you're looking for?

1. Check our Troubleshooting section
2. Search the Forum
3. Ask in Community Chat
4. Open a Documentation Issue

Contributing to This List

Found a useful resource not listed here?

• Submit a pull request to add it
• Open an issue with the suggestion
• Post in the forum

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Last updated: October 2025