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Diffstat (limited to 'docs/install/bbb_setup.md')
| -rw-r--r-- | docs/install/bbb_setup.md | 93 |
1 files changed, 48 insertions, 45 deletions
diff --git a/docs/install/bbb_setup.md b/docs/install/bbb_setup.md index 56608d04..03882956 100644 --- a/docs/install/bbb_setup.md +++ b/docs/install/bbb_setup.md @@ -1,4 +1,6 @@ -% How to program an SPI flash chip with the BeagleBone Black or Teensy 3.1 + +How to program an SPI flash chip with the BeagleBone Black or Teensy 3.1 +======================================================================== This document exists as a guide for reading from or writing to an SPI flash chip with the BeagleBone Black, using the @@ -26,10 +28,12 @@ flashing on the ThinkPad X200, but it should work for other targets. here is a photo of the setup for the teensy: <http://h5ai.swiftgeek.net/IMG_20160601_120855.jpg> -Onto the Beaglebone black... +Onto the Beaglebone black\... [Back to previous index](./) + + Hardware requirements ===================== @@ -100,6 +104,8 @@ Shopping list (pictures of this hardware is shown later): [Back to top of page.](#pagetop) + + Setting up the 3.3V DC PSU ========================== @@ -108,21 +114,21 @@ page](https://en.wikipedia.org/wiki/Power_supply_unit_%28computer%29#Wiring_diag 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 +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). +PS\_ON\# (this is also how an ATX motherboard turns on a PSU). -**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 +**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).** You only need one 3.3V supply and one ground for the flash chip, after -grounding PS\_ON#. +grounding PS\_ON\#. The male end of a 0.1" or 2.54mm header cable is not thick enough to remain permanently connected to the ATX PSU on its own. When connecting @@ -131,10 +137,11 @@ to a thicker piece of wire (you could use a paper clip), or wedge the male end of the jumper cable into the sides of the hole in the connector, instead of going through the centre. -Here is an example set up: - +Here is an example set up:\ ![](images/x200/psu33.jpg "Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net> see license notice at the end of this document") + + Accessing the operating system on the BBB ========================================= @@ -150,27 +157,26 @@ Alternatives to SSH (in case SSH fails) --------------------------------------- You can also use a serial FTDI debug board with GNU Screen, to access -the serial console. - - # screen /dev/ttyUSB0 115200 -Here are some example photos: - -  +the serial console.\ +\# **screen /dev/ttyUSB0 115200**\ +Here are some example photos:\ + \ You can also connect the USB cable from the BBB to another computer and a new network interface will appear, with its own IP address. This is -directly accessible from SSH, or screen: - -# **screen /dev/ttyACM0 115200** +directly accessible from SSH, or screen:\ +\# **screen /dev/ttyACM0 115200** You can also access the uboot console, using the serial method instead of SSH. + + Setting up spidev on the BBB ============================ Log on as root on the BBB, using either SSH or a serial console as -defined in [#bbb\_access](#bbb_access). Make sure that you have +defined in [\#bbb\_access](#bbb_access). Make sure that you have internet access on your BBB. Follow the instructions at @@ -197,24 +203,22 @@ contents of this file with: # Description: Starts LED aging (whatever that is) ### END INIT INFO - x=\$(/bin/ps -ef | /bin/grep "[l]ed_acc") - if [ ! -n "\$x" -a -x /usr/bin/led_acc ]; then + x=$(/bin/ps -ef | /bin/grep "[l]ed_acc") + if [ ! -n "$x" -a -x /usr/bin/led_acc ]; then /usr/bin/led_acc & fi Run **apt-get update** and **apt-get upgrade** then reboot the BBB, before continuing. -Check that the firmware exists: - - # ls /lib/firmware/BB-SPI0-01-00A0.* +Check that the firmware exists:\ +\# **ls /lib/firmware/BB-SPI0-01-00A0.\***\ Output: /lib/firmware/BB-SPI0-01-00A0.dtbo -Then: - - # echo BB-SPI0-01 > /sys/devices/bone\_capemgr.*/slots - # cat /sys/devices/bone\_capemgr.*/slots +Then:\ +\# **echo BB-SPI0-01 > /sys/devices/bone\_capemgr.\*/slots**\ +\# **cat /sys/devices/bone\_capemgr.\*/slots**\ Output: 0: 54:PF--- @@ -225,16 +229,14 @@ Output: 5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI 7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPI0-01 -Verify that the spidev device now exists: - - # ls -al /dev/spid* +Verify that the spidev device now exists:\ +\# **ls -al /dev/spid\***\ Output: crw-rw---T 1 root spi 153, 0 Nov 19 21:07 /dev/spidev1.0 Now the BBB is ready to be used for flashing. Make this persist across -reboots: - +reboots:\ In /etc/default/capemgr add **CAPE=BB-SPI0-01** at the end (or change the existing **CAPE=** entry to say that, if an entry already exists. @@ -250,9 +252,8 @@ libreboot\_src, and put the ARM binary for it on your BBB. Finally, get the ROM image that you would like to flash and put that on your BBB. -Now test flashrom: - - # ./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 +Now test flashrom:\ +\# **./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512**\ Output: Calibrating delay loop... OK. @@ -262,6 +263,8 @@ Output: This means that it's working (the clip isn't connected to any flash chip, so the error is fine). + + Connecting the Pomona 5250/5252 =============================== @@ -330,12 +333,13 @@ should.** if you need to extend the 3.3v psu leads, just use the same colour M-F leads, **but** keep all other leads short (10cm or less) -You should now have something that looks like this: - +You should now have something that looks like this:\   [Back to top of page.](#pagetop) + + Notes about stability {#stability} ===================== @@ -344,7 +348,7 @@ not always. That page has some notes about using resistors to affect stability. Currently, we use spispeed=512 (512kHz) but it is possible to use higher speeds while maintaining stability. -tty0\_ in #libreboot was able to get better flashing speeds with the +tty0\_ in \#libreboot was able to get better flashing speeds with the following configuration: - "coax" with 0.1 mm core and aluminum foley (from my kitchen), add @@ -354,12 +358,11 @@ following configuration: - See this image: <http://i.imgur.com/qHGxKpj.jpg> - He was able to flash at 50MHz (lower speeds are also fine). -Copyright © 2014, 2015 Leah Rowe <info@minifree.org> - -Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net> -Copyright © 2015 Albin Söderqvist +Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\ +Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net>\ +Copyright © 2015 Albin Söderqvist\ Permission is granted to copy, distribute and/or modify this document under the terms of the Creative Commons Attribution-ShareAlike 4.0 International license or any later version published by Creative |