add some starting docs that I've worked on.

These need to be merged.

freebsd.embed.env.txt

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+Architecture of FreeBSD Embedded Testing Environment
+
+Host Machine
+
+Provides connectivity to the internet, and Jails with root that have
+direct access to each host (so user can control NFS and related issues).
+Best way to provide this is via vnet for each jail.  VALE or bridge switch
+and provide one of the direct connection, and one for internet.
+
+Host allows device reservation, and allows each jail to turn on/off
+the device (host can drop socket in the jail, or via union mount).  Passes through serial console as well (devfs).
+
+
+
+USB to SPI?
+768-1118-ND
+
+https://openlabpro.com/guide/interfacing-microcontrollers-with-sd-card/
+
+https://github.com/enjoy-digital/litesdcard
+https://github.com/lambdaconcept/litesdcard
+
+cyprus ez-usb fx2
+
+https://hackaday.io/project/19783-sd-card-emulation
+fx3
+428-3347-ND
+https://www.cypress.com/file/136056/download
+
+
+ucontrol + gige, chips $10, but dev kit $100, looks like no pre made boards
+ ATSAMA5D3-XPLD

test.md.html

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+<meta charset="utf-8">
+<meta http-equiv="refresh" content="2">
+
+Embedded Board dev cluster
+==========================
+
+This is the description of how the cluster is architected and setup.  There
+are a few design decisions that are likely to be different in other
+environments, but this made the most sense for mine.
+
+Goal
+----
+
+The goal of this setup is to allow people to be able to install and test
+images on various boards remotely.
+
+###  Features
+
+- Remote power control
+- serial console access
+- Network boot
+- Internet connectivity for boards w/ ethernet
+- Isolation between board environments
+  Likely implemented via VLANs+jails w/ VNET to provide complete control
+- Long term goals:
+  - Emulated microSD cards
+
+### Architecture
+
+The following diagrams the connections between the components.  It is expected
+that the connections for the RockPro64 is followed similarly for other embedded
+devices.
+
+In the case of the Switch, the RockPro64 will be put on a VLAN which will be
+delivered to the Host machine tagged.  This will allow a jail in the host
+machine to have a direct control over the broadcast domain for the device.
+This will allow running dhcp/bootp/tftp services for netbooting by running dnsmasq
+or another service.  As fusefs is now jail friendly, the root FS could even be
+mounted via sshfs
+
+*************************************************************************************
+*                                                                                   *
+*                            +---------------------------+                          *
+*                            |                           |                          *
+*                            |         Internet          |                          *
+*                            |                           |                          *
+*                            +-------------+-------------+                          *
+*                                          |                                        *
+*                                          |                                        *
+*                                          |                                        *
+*                            +-------------+-------------+                          *
+*                            |                           |                          *
+*             +--------------+        VLAN Switch        +--------------+           *
+*             |              |                           |              |           *
+*             |              +---------------------------+              |           *
+*             |                                                         |           *
+*    +--------+-------+                                        +--------+-------+   *
+*    |                |                                        |                |   *
+*    |  Host machine  |                                        |    RockPro64   |   *
+*    |                |                                        |                |   *
+*    +--------+-------+                                        +--------+---+---+   *
+*             |                                                         |   |       *
+*             |                                                         |   |       *
+*    +--------+-------+                                                 |   |       *
+*    |                |           +------------------+                  |   |       *
+*    |     USB Hub    +-----------+  Serial adapter  +------------------+   |       *
+*    |                |           +------------------+                      |       *
+*    +--------+-------+                                                     |       *
+*             |                                                             |       *
+*             |              +---------------------------+                  |       *
+*             |              |                           +------------------+       *
+*             +--------------+      Power Controler      |                          *
+*                            |                           +----+                     *
+*                            +---------------------------+    |                     *
+*                                                             |                     *
+*                                                     +-------+-------+             *
+*                                                     |     12V PS    |             *
+*                                                     +---------------+             *
+*                                                                                   *
+*************************************************************************************
+
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