diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/install/bbb_setup.html | 107 |
1 files changed, 48 insertions, 59 deletions
diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html index f3f93d5..8ff2d8e 100644 --- a/docs/install/bbb_setup.html +++ b/docs/install/bbb_setup.html @@ -17,8 +17,8 @@ <h1 id="pagetop">How to program an SPI flash chip with the BeagleBone Black</h1> <p> This document exists as a guide for reading from or writing to an SPI flash chip with the BeagleBone Black, - using the <a href="http://flashrom.org/Flashrom">flashrom</a> software. - BeagleBone Black rev. C was used when creating this guide, but earlier revisions + using the <a href="http://flashrom.org/Flashrom">flashrom</a> software. + A BeagleBone Black, rev. C was used when creating this guide, but earlier revisions may also work. </p> <p><a href="index.html">Back to previous index</a></p> @@ -33,74 +33,64 @@ </p> <ul> <li> - External SPI programmer: <b>BeagleBone Black</b> (rev. C) - is highly recommended. Sometimes referred to as 'BBB'. - <a href="http://beagleboard.org/black">This page</a> contains a list of distributors. - farnell sells them - <a href="http://farnell.com/">http://farnell.com/</a> - - If you can't get a BBB, there are other programmers listed on flashrom.org, but - not all of them will be suitable for libreboot's purpose. (some may also require blobs. all BBs and BBBs though can be used without blobs). - There are also some programmers not listed on flashrom.org, that can also work. - A BB (original beaglebone) should work as well, though you might have to replace the distro - that it came with. + A <a href="http://flashrom.org">Flashrom</a>-compatible external SPI programmer: + <strong>BeagleBone Black</strong>, sometimes referred to as 'BBB', (rev. C) is highly recommended. + You can buy one from <a href="https://www.adafruit.com">Adafruit</a> (USA), <a href="http://electrokit.com">ElectroKit</a> (Sweden) + or any of the distributors listed <a href="http://beagleboard.org/black">here</a> (look below 'Purchase'). + We recommend this product because we know that it works well for our purposes and doesn't require any non-free software. </li> <li> - Electrical/insulative tape: cover the entire bottom surface of the BBB (the part that - rests on a surface). This is important, when placing the BBB on top of a board - so that nothing shorts. - easy to find in most hardware/electronics stores + Electrical/insulative tape: cover the entire bottom surface of the BBB (the part that rests on a surface). + This is important, when placing the BBB on top of a board so that nothing shorts. + Most hardware/electronics stores have this. Optionally, you can use the bottom half of a + <a href="http://www.hammondmfg.com/1593HAM.htm#BeagleBoneBlack">hammond plastic enclosure</a>. </li> <li> - Clip for connecting to the flash chip: if you have a SOIC-16 - flash chip (16 pins), you will need the <b>Pomona 5252</b> - or equivalent. For SOIC-8 flash chips (8 pins), you will - need the <b>Pomona 5250</b> or equivalent. Do check which chip you have, - before ordering a clip. Also, make sure to buy at least two clips - (they break easily). - - Farnell sells these, and ships to many countries. <a href="http://farnell.com/">http://farnell.com/</a> - - Some people find these difficult to get, especially in South America. If you have more links to suppliers, - please contact the libreboot project with the relevant information. - - <b>if you can't get a pomona clip, some other clips might work (eg 3M) but are not always reliable. You can also - directly solder the wires to the chip, if that suits you. The clip is just for convenience, really.</b> + Clip for connecting to the flash chip: if you have a SOIC-16 flash chip (16 pins), you will need the + <strong>Pomona 5252</strong> or equivalent. For SOIC-8 flash chips (8 pins), you will need the <strong>Pomona 5250</strong> + or equivalent. Do check which chip you have, before ordering a clip. Also, you might as well buy two clips or more since they break easily. + <a href="http://farnell.com/">Farnell element 14</a> sells these and ships to many countries. Some people find these clips difficult to + get hold of, especially in South America. If you know of any good suppliers, please contact the libreboot project with the relevant information. + <strong>If you can't get hold of a pomona clip, some other clips might work, e.g. 3M, but they are not always reliable. + You can also directly solder the wires to the chip, if that suits you; the clip is just for convenience, really.</strong> </li> <li> - <b>External 3.3V DC power supply</b>, for powering the flash chip. - An ATX power supply / PSU (common on Intel/AMD desktop computers) will work for this. - A lab PSU (DC) will also work (adjusted to 3.3V). Etc. + <strong>External 3.3V DC power supply</strong>, for powering the flash chip: an ATX power supply / PSU (common on Intel/AMD desktop + computers) will work for this. A lab PSU (DC) will also work (adjusted to 3.3V). <ul> - <li>Getting a multimeter might be worthwhile, to verify that it's supplying 3.3V</li> + <li>Getting a multimeter might be worthwhile, to verify that it's supplying 3.3V.</li> </ul> </li> <li> - <b>External 5V DC power supply</b> (barrel connector), for powering the BBB. - The BeagleBone can have power supplied via USB, but a - dedicated power supply is recommended. These should be easy to find in most places - that sell electronics. - <b>OPTIONAL. Only needed if not powering with the USB cable, or if you want - to use <a href="bbb_ehci.html">EHCI debug</a></b> + <strong>External 5V DC power supply</strong> (barrel connector), for powering the BBB: + the latter can have power supplied via USB, but a dedicated power supply is recommended. + These should be easy to find in most places that sell electronics. <strong>OPTIONAL. + Only needed if not powering with the USB cable, or if you want to use <a href="bbb_ehci.html">EHCI debug</a></strong>. </li> <li> - <b>Pin header / jumper cables</b> (2.54mm / 0.1" headers) - You should get male-male, male-female and female-female - cables in 10cm size. Just get a load of them. - other possible names for these cables: + <strong>Pin header / jumper cables</strong> (2.54mm / 0.1" headers): you should get male--male, + male--female and female--female cables in 10cm size. Just get a load of them. + Other possible names for these cables/wires/leads are as follows: <ul> <li>flying leads</li> - <li>dupont (this is just one possible brand name)</li> - <li>Often used on breadboards, so they might be called breadboard cables</li> - <li>Maybe they are called <b>wires</b> instead of cables or leads</li> - <li>They are also the same cables used on the GPIOs on the RPi</li> - <li><b>adafruit.com</b> sells them, and there are others</li> - <li><b>Some people find these difficult to buy. Contact the libreboot project if you have more links to sellers.</b></li> + <li>breadboard cables (since they are often used on breadboards).</li> <li>You might also be able to make these cables yourself.</li> </ul> - For PSU connections, long cables (e.g. 20cm) is fine, and you can extend it longer than that if needed. + <a href="https://www.adafruit.com">Adafruit</a> sell them, as do many others. + <strong>Some people find them difficult to buy. Please contact the libreboot project if you know of any good sellers.</strong> + You might also be able to make these cables yourself. For PSU connections, using long cables, e.g. 20cm, is fine, and you can extend them longer than that if needed. </li> <li> <b>Mini USB A-B cable</b> (the BeagleBone probably already comes with one.) - <b>OPTIONAL - only needed for <a href="bbb_ehci.html">EHCI debug</a> or for serial/ssh access without ethernet cable (g_multi kernel module)</b> + + <strong>Mini USB A-B cable</strong>: the BBB probably already comes with one. <strong>OPTIONAL---only needed for + <a href="bbb_ehci.html">EHCI debug</a> or for serial/SSH access without ethernet cable (g_multi kernel module)</strong>. </li> <li> - <b>FTDI TTL cable or debug board</b>, for accessing the serial console on your BBB. - <a href="http://elinux.org/Beagleboard:BeagleBone_Black_Serial">This page</a> contains - a list. - <b>OPTIONAL - only needed for serial console on the BBB, if not using SSH via ethernet cable</b> + <strong>FTDI TTL cable or debug board</strong>: used for accessing the serial console on the BBB. + <a href="http://elinux.org/Beagleboard:BeagleBone_Black_Serial">This page</a> contains a list. + <strong>OPTIONAL---only needed for serial console on the BBB, if not using SSH via ethernet cable.</strong> </li> </ul> @@ -115,21 +105,19 @@ <h1>Setting up the 3.3V DC PSU</h1> <p> - ATX PSU pinouts are on <a href="https://en.wikipedia.org/wiki/Power_supply_unit_%28computer%29#Wiring_diagrams">wikipedia</a> + ATX PSU pinouts can be read on <a href="https://en.wikipedia.org/wiki/Power_supply_unit_%28computer%29#Wiring_diagrams">this Wikipedia page</a>. </p> <p> - You can use pin 1 or 2 (orange wire) on a 20-pin or 24-pin ATX PSU for 3.3V, - and any of the ground/earth sources (black cables) for ground. - Short PS_ON# / Power on (green wire. pin 16 on 24-pin ATX PSU, or pin 14 on a 20-pin ATX PSU) to a ground - (black. there is one right next to it) using a wire/paperclip/jumper then - power on the PSU by grounding PS_ON# (this is also how an ATX motherboard turns on a PSU). + You can use pin 1 or 2 (orange wire) on a 20-pin or 24-pin ATX PSU for 3.3V, and any of the ground/earth sources (black cables) for ground. + Short PS_ON# / Power on (green wire; pin 16 on 24-pin ATX PSU, or pin 14 on a 20-pin ATX PSU) to a ground + (black; there is one right next to it) using a wire/paperclip/jumper, then power on the PSU by grounding PS_ON# + (this is also how an ATX motherboard turns on a PSU). </p> <p> - <b>DO **NOT** use pin 4, 6, do **NOT** use pin 19 or 20 (on a 20-pin ATX PSU), and - DO **NOT** use pin 21, 22 or 23 (on a 24-pin ATX PSU). Those wires (the red ones) are 5V, and they **WILL** - kill your flash chip. ***NEVER*** supply more than 3.3V to your flash chip. - (that is, if it's a 3.3V flash chip. 5V and 1.8V SPI flash chips do exist, but they are rare. always - check what voltage your chip takes. most take 3.3V)</b> + <strong>DO **NOT** use pin 4, 6, do **NOT** use pin 19 or 20 (on a 20-pin ATX PSU), and DO **NOT** use pin + 21, 22 or 23 (on a 24-pin ATX PSU). Those wires (the red ones) are 5V, and they **WILL** kill your flash chip. + ***NEVER*** supply more than 3.3V to your flash chip (that is, if it's a 3.3V flash chip; 5V and 1.8V SPI + flash chips do exist, but they are rare. Always check what voltage your chip takes. Most of them take 3.3V).</strong> </p> <p> You only need one 3.3V supply and one ground for the flash chip, after grounding PS_ON#. @@ -421,6 +409,7 @@ GND 4-5 MOSI <p> Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk><br/> Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net><br/> + Copyright © 2015 Albin Söderqvist<br/> Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; |