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Diffstat (limited to 'docs/install/bbb_setup.md')
| -rw-r--r-- | docs/install/bbb_setup.md | 39 |
1 files changed, 16 insertions, 23 deletions
diff --git a/docs/install/bbb_setup.md b/docs/install/bbb_setup.md index af9026b3..b80203b4 100644 --- a/docs/install/bbb_setup.md +++ b/docs/install/bbb_setup.md @@ -28,7 +28,7 @@ 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... Hardware requirements ===================== @@ -150,12 +150,14 @@ 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:\  \ 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 You can also access the uboot console, using the serial method instead @@ -202,14 +204,16 @@ before continuing. 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 + # echo BB-SPI0-01 > /sys/devices/bone_capemgr.\*/slots + # cat /sys/devices/bone_capemgr.\*/slots + Output: 0: 54:PF--- @@ -223,6 +227,7 @@ Output: 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 @@ -246,7 +251,8 @@ your BBB. Now test flashrom: - # ./flashrom -p linux\_spi:dev=/dev/spidev1.0,spispeed=512 + # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 + Output: Calibrating delay loop... OK. @@ -327,25 +333,12 @@ leads, **but** keep all other leads short (10cm or less) You should now have something that looks like this:\   -Notes about stability {#stability} -===================== - -<http://flashrom.org/ISP> is what we typically do in libreboot, though -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 -following configuration: - -- "coax" with 0.1 mm core and aluminum foley (from my kitchen), add - 100 Ohm resistors (serial) -- put heatshrink above the foley, for: CS, CLK, D0, D1 -- Twisted pair used as core (in case more capacitors are needed) -- 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\ -This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt) + +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 +with no Invariant Sections, no Front Cover Texts, and no Back Cover Texts. +A copy of this license is found in [../fdl-1.3.md](../fdl-1.3.md) |