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diff --git a/docs/getting-started/machines/raspberrypi.md b/docs/getting-started/machines/raspberrypi.md index f963e0b..b1b31cb 100644 --- a/docs/getting-started/machines/raspberrypi.md +++ b/docs/getting-started/machines/raspberrypi.md @@ -1,39 +1,149 @@ -# Building the AGL Demo Platform for Raspberry Pi +# Building for Raspberry PI 2 or 3 -## Raspberry Pi 3 +The +[Raspberry PI](https://www.raspberrypi.org/help/what-%20is-a-raspberry-pi/) is a small +computer that is ideal for learning computing and computer languages. +The AGL Project supports building images for the +[Raspberry PI 2](https://www.raspberrypi.org/products/raspberry-pi-2-model-b/) and the +[Raspberry PI 3](https://www.raspberrypi.org/products/raspberry-pi-3-model-a-plus/) boards. +Each of these boards comes in a variety of models. +See the +[Raspberry PI Product Page](https://www.raspberrypi.org/products/) for more information. -To build AGL demo platform for Raspberry Pi 3 use machine **raspberrypi3** and feature **agl-demo**: +This section describes the steps you need to take to build the +AGL demo image for both the Raspberry PI 2 and 3 boards. + +## 1. Making Sure Your Build Environment is Correct + +The +"[Initializing Your Build Environment](../image-workflow-initialize-build-environment.html/Initializing-your-build-environment)" +section presented generic information for setting up your build environment +using the `aglsetup.sh` script. +If you are building the AGL demo image for a Raspberry PI board, you need to specify some +specific options when you run the script. + +Use the following commands to initialize your build environment. +In each case, the "-m" option specifies the machine and the +list of AGL features used with script are appropriate for development of +the AGL demo image suited for either Raspberry PI 2 or 3: + +**Raspberry PI 2**: ```bash -source meta-agl/scripts/aglsetup.sh -m raspberrypi3 agl-demo agl-netboot agl-appfw-smack -bitbake agl-demo-platform +$ source meta-agl/scripts/aglsetup.sh -m raspberrypi2 agl-demo agl-netboot agl-appfw-smack ``` -## Raspberry Pi 2 - -To build AGL demo platform for Raspberry Pi 2 use machine **raspberrypi2** and feature **agl-demo**: +**Raspberry PI 3**: ```bash -source meta-agl/scripts/aglsetup.sh -m raspberrypi2 agl-demo agl-netboot agl-appfw-smack -bitbake agl-demo-platform +$ source meta-agl/scripts/aglsetup.sh -m raspberrypi3 agl-demo agl-netboot agl-appfw-smack ``` -## 2. Booting the Image on Raspberry Pi +## 2. Using BitBake -Follow the steps below to copy the image to microSD card and to boot it on Raspberry Pi 2 or 3: +This section shows the `bitbake` command used to build the AGL image. +Before running BitBake to start your build, it is good to be reminded that AGL +does provide a pre-built image for developers that want to use the Raspberry PI 3 +board. +You can find this pre-built image on the +[AGL Download web site](https://download.automotivelinux.org/AGL/release). + +For the supported image, the filename has the following form: + +``` +<release-name>/<release-number>/raspberrypi3/deploy/images/raspberrypi3/* +``` -* Connect your sdcard in your linux machine. -* Copy output image from build machine to linux machine that is connected your sdcard. (Often, those are same machines) -* Output Image location in build machine for Raspberry Pi 2: *tmp/deploy/images/raspberrypi2/agl-demo-platform-raspberrypi2.wic.xz* -* Output Image location in build machine for Raspberry Pi 3: *tmp/deploy/images/raspberrypi3/agl-demo-platform-raspberrypi3.wic.xz* -* Unmount the microSD card and after that flash output image to it card with root user: +Start the build using the `bitbake` command. -*Note: the sdimage files can also be named rpi-sdimg-ota in case you have the **"agl-sota"** feature enabled* +**NOTE:** An initial build can take many hours depending on your +CPU and and Internet connection speeds. +The build also takes approximately 100G-bytes of free disk space. + +For this example, the target is "agl-demo-platform": ```bash -sudo umount [sdcard device] -xzcat [output image] | sudo dd of=[sdcard device] bs=4M -sync +$ bitbake agl-demo-platform +``` + +By default, the build process puts the resulting image in the Build Directory. +Here is example for the Raspberry PI 3 board: + ``` +<build_directory>/tmp/deploy/images/raspberrypi3/agl-demo-platform-raspberrypi3.wic.xz +``` + +If you build for the Raspberry PI 2 board, the location uses "raspberrypi2" in the path. + +## 2. Deploying the AGL Demo Image + +Deploying the AGL demo image consists of copying the image on a MicroSD card, +plugging the card into the Raspberry PI board, and then booting the board. + +Follow these steps to copy the image to a MicroSD card and boot +the image on the Raspberry PI 2 or 3 board: + +1. Plug your MicroSD card into your Build Host (i.e. the system that has your build output). + +2. Be sure you know the MicroSD device name. + + Use the `dmesg` command as follows to discover the device name: + + ```bash + $ dmesg | tail -4 + [ 1971.462160] sd 6:0:0:0: [sdc] Mode Sense: 03 00 00 00 + [ 1971.462277] sd 6:0:0:0: [sdc] No Caching mode page found + [ 1971.462278] sd 6:0:0:0: [sdc] Assuming drive cache: write through + [ 1971.463870] sdc: sdc1 sdc2 + ``` + + In the previous example, the MicroSD card is attached to the device `/dev/sdc`. + + You can also use the `lsblk` command to show all your devices. + Here is an example that shows the MicroSD card as `/dev/sdc`: + + ```bash + $ lsblk + NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT + sda 8:0 0 167,7G 0 disk + ├─sda1 8:1 0 512M 0 part /boot/efi + ├─sda2 8:2 0 159,3G 0 part / + └─sda3 8:3 0 7,9G 0 part [SWAP] + sdb 8:16 0 931,5G 0 disk + └─sdb1 8:17 0 931,5G 0 part /media/storage + sdc 8:32 1 14,9G 0 disk + ├─sdc1 8:33 1 40M 0 part + └─sdc2 8:34 1 788M 0 part + ``` + + **IMPORTANT NOTE:** Before re-writing any device on your Build Host, you need to + be sure you are actually writing to the removable MicroSD card and not some other + device. + Each computer is different and removable devices can change from time to time. + Consequently, you should repeat the previous operation with the MicroSD card to + confirm the device name every time you write to the card. + + To summarize this example so far, we have the following: + + * The first SATA drive is `/dev/sda`. + + * `/dev/sdc` corresponds to the MicroSD card, and is also marked as a removable device. + You can see this in the output of the `lsblk` command where "1" appears in the "RM" column + for that device. + +3. Now that you know the device name, unmount the device and use the + `xzcat` command to copy the image to the MicroSD card. + + **NOTE:** For Raspberry PI 2, the image is at `build/tmp/deploy/images/raspberrypi2/agl-demo-platform-raspberrypi2.wic.xz`. + For Raspberry PI 3, the image is at `build/tmp/deploy/images/raspberrypi3/agl-demo-platform-raspberrypi3.wic.xz`. + + Be sure you are root, provide the actual device name for *sdcard_device_name*, and the actual + image name for *image_name*: + + ```bash + $ sudo umount <sdcard_device_name> + $ xzcat <image_name> | sudo dd of=<sdcard_device_name> bs=4M + $ sync + ``` -* Plug your microSD card into Raspberry Pi 2 or 3 and boot the board +4. Plug your MicroSD card into the Raspberry PI board and boot the device. |