Update readmeHEADmaster

The previous README.md file was inherited from Intel's layer, and it is largely
unsuitable for the direction this fork of the layer is now taking.

1 files changed, 13 insertions, 114 deletions

diff --git a/README.md b/README.md
index 1523a13..0ff2873 100644
--- a/README.md
+++ b/README.md
@@ -1,120 +1,19 @@
-# Layer to Support the Terasic DE10-Nano\* Board
+# Yocto layer to support the Terasic DE10-Nano Board
 
-## Overview
-Instructions to build the image for the Terasic DE10-Nano\* development board and then write that image to a microSD card.
+A fork of Intel's [meta-de10-nano layer][meta-de10-nano], this layer aims to
+support more minimal development _without_ the demo tools for the board. In
+addition, I aim to keep it using upstream kernel and U-Boot rather than vendor
+forks.
 
-This layer provides support for building a demonstration and development image of Linux\* for the [Terasic DE10-Nano](https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=205&No=1046&PartNo=8) kit's development board.
+## State
 
-## Build Instructions
-Please refer to [README.md](https://github.com/Angstrom-distribution/angstrom-manifest/blob/master/README.md) for any prerequisites. These instructions assume prerequisites have been met.  
+The layer is currently still a work in progress, but a minimal Linux image can
+be booted into.
 
-**Note**: See the instructions for configuring proxies.
+## To do:
 
-Steps to build the image:
+* strip out demo tools
+* list more "to do" tasks
+* write a proper readme
 
-1. Clone the manifest.
-2. Add the meta-de10-nano layer.
-3. Fetch repositories.
-4. Build the image.
-
-
-### Step 1: Clone the Manifest
-Clone the manifest to get all required recipes for building the image.
-```
-mkdir de10-nano-build
-cd de10-nano-build
-repo init -u git://github.com/Angstrom-distribution/angstrom-manifest -b angstrom-v2016.12-yocto2.2 
-```
-### Step 2: Add the meta-de10-nano Layer
-The default manifests do not include the meta-de10-layer. Therefore, we add the layer and resolve any issues encountered with errant layers.
-
-```
-mkdir .repo/local_manifests
-```
-Now we create the manifest to add the meta-de10-layer. The following will create .repo/local_manifests/de10-nano.xml. This specifies a specific revision for meta-altera and meta-de10-nano.
-
-```
-cat << EOF > .repo/local_manifests/de10-nano.xml
-<?xml version="1.0" encoding="UTF-8"?>                                          
-<manifest>                                                                      
-        <remove-project name="kraj/meta-altera" />                              
-        <remove-project name="koenkooi/meta-photography" />                     
-        <remove-project name="openembedded/meta-linaro" />                      
-        <project name="openembedded/meta-linaro" path="layers/meta-linaro" remote="linaro" revision="992eaa0a1969c2056a5321c122eaa8cd808c1c82" upstream="master"/>
-        <project remote="github"  name="kraj/meta-altera" path="layers/meta-altera" revision="cf7fc462cc6a5e82f2de76bb21e09675be7ae316"/>
-        <project name="01org/meta-de10-nano" path="layers/meta-de10-nano" remote="github" revision="refs/tags/VERSION-2017.03.31"/>
-</manifest> 
-EOF
-```
-The above also disables meta-photography, so we have to edit conf/bblayers.conf to remove the reference to it.
-```
-sed -i '/meta-photography/d' .repo/manifests/conf/bblayers.conf
-```
-We also need to add in the new meta-de10-nano layer to the bblayers.conf
-
-```
-sed -i '/meta-altera/a \ \ \$\{TOPDIR\}\/layers\/meta-de10-nano \\' .repo/manifests/conf/bblayers.conf
-```
-### Step 3: Fetch the Repositories from the Manifest
-```
-repo sync
-```
-
-### Step 4: Build the Image
-Estimated to complete: 2–3 hours.
-```
-MACHINE=de10-nano . ./setup-environment
-bitbake de10-nano-image
-```
-
-## After Building the Image
-The result of this lengthy build is an image that can be written to an SD card which will enable the Terasic DE10-Nano board to boot Linux\*. The image provides access via serial port, a graphical interface, USB, and Ethernet. As part of the build, the recipes populate an FPGA image as well as the associated device trees.  
-
-The build output is located in deploy/glibc/images/de10-nano/
-
-```
-[de10-nano]$ ls
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.cpio           de10-nano.rbf                                                           u-boot-de10-nano.img
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.ext3           dump_adv7513_edid.bin                                                   u-boot-de10-nano.img-de10-nano
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.manifest       dump_adv7513_edid.srec                                                  u-boot-de10-nano-v2017.03+gitAUTOINC+d03450606b-r0.img
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.socfpga-sdimg  dump_adv7513_regs.bin                                                   u-boot.img
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.tar.gz         dump_adv7513_regs.srec                                                  u-boot.img-de10-nano
-Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.tar.xz         extlinux.conf                                                           u-boot-with-spl.sfp
-de10_nano_hdmi_config.bin                                                   extlinux.conf-de10-nano                                                 u-boot-with-spl.sfp-de10-nano
-de10_nano_hdmi_config.srec                                                  extlinux.conf-de10-nano-r0                                              u-boot-with-spl.sfp-de10-nano-de10-nano
-de10-nano-image-Angstrom-v2016.12.socfpga-sdimg                             LICENSE.de10-nano.rbf                                                   u-boot-with-spl.sfp-de10-nano-v2017.03+gitAUTOINC+d03450606b-r0-de10-nano-v2017.03+gitAUTOINC+d03450606b-r0
-de10-nano-image-de10-nano.cpio                                              Log.txt                                                                 zImage
-de10-nano-image-de10-nano.ext3                                              modules--4.1.33-ltsi+git0+b84195c056-r0.1-de10-nano-20170330172917.tgz  zImage--4.1.33-ltsi+git0+b84195c056-r0.1-de10-nano-20170330172917.bin
-de10-nano-image-de10-nano.manifest                                          modules-de10-nano.tgz                                                   zImage--4.1.33-ltsi+git0+b84195c056-r0.1-socfpga_cyclone5_de10_nano-20170330172917.dtb
-de10-nano-image-de10-nano.socfpga-sdimg                                     README_-_DO_NOT_DELETE_FILES_IN_THIS_DIRECTORY.txt                      zImage-de10-nano.bin
-de10-nano-image-de10-nano.tar.gz                                            STARTUP.BMP                                                             zImage-socfpga_cyclone5_de10_nano.dtb
-de10-nano-image-de10-nano.tar.xz                                            STARTUP.BMP.LICENSE
-
-```
-The SD card image name in the above list is "Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.socfpga-sdimg".  
-
-**Note**: prebuilt images can be found [here](https://software.intel.com/en-us/iot/hardware/fpga/de10-nano).
-
-### Write the Image to a MicroSD Card
-These instructions only cover Linux\*, for alternate instructions please go [here](https://software.intel.com/en-us/write-image-to-micro-sd-card).
-
-**Caution**: These instructions use the dd command which should be used with EXTREME CAUTION. It is very easy to accidentally overwrite the wrong device which can lead to data loss as well as hours spent rebuilding your machine. 
-
-The first step is to insert the SD Card using either a dedicated SD Card interface or a USB adapter into your machine. Discover which device this shows up. Usually the device shows up as /dev/sdX or /dev/mmcblkX where X is the device number. As an example, our dedicated SD Card interface shows up as /dev/mmcblk0.
-
-**Note**: for safety reasons these instructions will use /dev/mmcblkX as this should never be a real device.
-
-It will take a few minutes to write the image (~2GB).
-```
-cd deploy/glibc/images/de10-nano/
-sudo dd if=Angstrom-de10-nano-image-glibc-ipk-v2016.12-de10-nano.rootfs.socfpga-sdimg of=/dev/mmxblkX bs=1M && sync && sync
-```
-
-After this completes, insert the microSD card into the DE10-Nano board and then power it on.
-
- ## Additional Resources
-* [Discover the Terasic DE10-Nano Kit](https://signin.intel.com/logout?target=https://software.intel.com/en-us/iot/hardware/fpga/de10-nano)
-* [Terasic DE10-Nano Get Started Guide](https://software.intel.com/en-us/terasic-de10-nano-get-started-guide)
-* [Project: My First FPGA](https://software.intel.com/en-us/articles/my-first-fpga)
-* [Learn more about Intel® FPGAs](https://software.intel.com/en-us/iot/hardware/fpga/)
-* [DE10-Nano FPGA Hardware Project](https://github.com/01org/de10-nano-hardware)
+[meta-de10-nano]: https://github.com/intel/meta-de10-nano