Introduction

Repo for several programs targetting the AllWinner A20-OLinuXino-MICRO board.

Currently, all the programs are run after u-boot board initialization.

Documentation

The following is a list of documents, and links where to find them, that I personally employ for development on the AllWinner A20-OLinuXino-MICRO board.

ARM References:

• ARM Architecture Reference Manual - ARMv7-A/R Edition - Issue D. Last access: 27.11.2019.

• ARM and Thumb2 Instruction Set - Quick Card Reference - Issue M. Last access: 27.11.2019.

A20-OlinuXino-Micro References:

• A20-OlinuXino-Micro - User's Manual - Revision S. Last Access: 27.11.2019.
• A20 User Manual - Revision 1.4. Last Access: 27.11.2019.
• A20-OlinuXino-Micro - Hardware Schematics - Revision from G1 to L1. Last Access: 28.11.2019.

Toolchain

You can download the bare-metal GNU toolchain (Cortex-A family) directly from developer.arm.com

Configure

If you already have the toolchain's directory in your PATH, you're good to go. Otherwise, you have to specify the directory in the DIR variable of the top-level Makefile.

How to build

A top-level Makefile manages the building of each program.

To build all programs, simply type make or make all.

For building a subset of programs, simply append their folder's name to make:

make $(FOLDER_NAME_1) $(FOLDER_NAME_2) ... $(FOLDER_NAME_N)

For example:

make blink-led

builds the blink-led program.