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| -rw-r--r-- | docs/install/bbb_setup.md | 113 |
1 files changed, 41 insertions, 72 deletions
diff --git a/docs/install/bbb_setup.md b/docs/install/bbb_setup.md index 5d684a7f..352344a4 100644 --- a/docs/install/bbb_setup.md +++ b/docs/install/bbb_setup.md @@ -18,15 +18,10 @@ Lastly SBC is an example of self-contained device that is capable of flashing, but it's possible to use smaller device like stm32 bluepill with another computer to achieve similar result.* -*NOTE: this documentation may be outdated, and discusses configuring -SPI flashing on the default Debian system that the BBB sometimes comes -with. If you want an easier time, just use [BBB -ScrewDriver](https://www.coreboot.org/BBB_screwdriver) which comes -pre-configured.* - -*This guide is written for Debian Wheezy 7.5, which is what came on the -BBB at the time this guide was written. This one: -<https://debian.beagleboard.org/images/bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz>* +*Note: This guide was written for Debian Stretch 9.5, which is the latest +operating system for the BeagleBone Black as of June 2019. It is possible that +these instructions may be outdated if newer operating systems versions +have been released since then.* There was no justification for a further section for the Teensy. Simply refer to [this page on @@ -146,10 +141,14 @@ Here is an example set up:\ Accessing the operating system on the BBB ========================================= -The operating system on your BBB will probably have an SSH daemon -running where the root account has no password. Use SSH to access the -operating system and set a root password. By default, the OS on your BBB -will most likely use DHCP, so it should already have an IP address. +Follow the [Getting Started](https://beagleboard.org/getting-started) +instructions to install the latest version of Debian onto the BBB. +It is recommended to download the eMMC IoT Flasher edition, which will +write its image to the on-board eMMC. + +The operating system on the BBB can be accessed over SSH, with username +'debian' and password 'temppwd'. Follow the instructions on the Getting +Started page for complete details. You will also be using the OS on your BBB for programming an SPI flash chip. @@ -176,76 +175,46 @@ 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 -internet access on your BBB. - -Follow the instructions at -<http://elinux.org/BeagleBone_Black_Enable_SPIDEV#SPI0> up to (and -excluding) the point where it tells you to modify uEnv.txt - -You need to update the software on the BBB first. If you have an -element14 brand BBB (sold by Premier Farnell plc. stores like Farnell -element14, Newark element14, and Embest), you may need to [work around a -bug](https://groups.google.com/forum/?_escaped_fragment_=msg/beagleboard/LPjCn4LEY2I/alozBGsbTJMJ#!msg/beagleboard/LPjCn4LEY2I/alozBGsbTJMJ) -in the LED aging init script before you can update your software. If you -don't have a file named /etc/init.d/led\_aging.sh, you can skip this -step and update your software as described below. Otherwise, replace the -contents of this file with: - - #!/bin/sh -e - ### BEGIN INIT INFO - # Provides: led_aging.sh - # Required-Start: $local_fs - # Required-Stop: $local_fs - # Default-Start: 2 3 4 5 - # Default-Stop: 0 1 6 - # Short-Description: Start LED aging - # Description: Starts LED aging (whatever that is) - ### END INIT INFO - - x=$(/bin/ps -ef | /bin/grep "[l]ed_acc") - if [ ! -n "$x" -a -x /usr/bin/led_acc ]; then - /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. +Log in to the BBB using either SSH or a serial console as +described in [\#bbb\_access](#bbb_access). -Output: +*Note: The following commands are run as root. To run them from a normal user +account, add yourself to the `gpio` group to configure the pins and the `spi` +group to access spidev.* - /lib/firmware/BB-SPI0-01-00A0.dtbo +Run the following commands to enable spidev: -Then: + # config-pin P9.17 spi_cs + # config-pin P9.18 spi + # config-pin P9.21 spi + # config-pin P9.22 spi_sclk - # echo BB-SPI0-01 > /sys/devices/bone_capemgr./slots - # cat /sys/devices/bone_capemgr./slots +Verify that the spidev devices now exist: -Output: + # ls /dev/spidev* - 0: 54:PF--- - 1: 55:PF--- - 2: 56:PF--- - 3: 57:PF--- - 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G - 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 +Output: -Verify that the spidev device now exists: + /dev/spidev1.0 /dev/spidev1.1 /dev/spidev2.0 /dev/spidev2.1 - # ls -al /dev/spid* +Now the BBB is ready to be used for flashing. The following systemd service +file can optionally be enabled to make this persistent across reboots. -Output: +``` +[Unit] +Description=Enable SPI function on pins - crw-rw---T 1 root spi 153, 0 Nov 19 21:07 /dev/spidev1.0 +[Service] +Type=oneshot +ExecStart=config-pin P9.17 spi_cs +ExecStart=config-pin P9.18 spi +ExecStart=config-pin P9.21 spi +ExecStart=config-pin P9.22 spi_sclk +RemainAfterExit=yes -Now the BBB is ready to be used for flashing. Make this persist across -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. +[Install] +WantedBy=multi-user.target +``` Get flashrom from the libreboot\_util release archive, or build it from libreboot\_src/git if you need to. An ARM binary (statically compiled) |