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1 | This README file contains information on building the meta-cedartrail | ||
2 | BSP layer, and booting the images contained in the /binary directory. | ||
3 | Please see the corresponding sections below for details. | ||
4 | |||
5 | |||
6 | Table of Contents | ||
7 | ================= | ||
8 | |||
9 | I. Building the meta-cedartrail BSP layer | ||
10 | II. Booting the images in /binary | ||
11 | |||
12 | |||
13 | I. Building the meta-cedartrail BSP layer | ||
14 | ========================================= | ||
15 | |||
16 | In order to build an image with BSP support for a given release, you | ||
17 | need to download the corresponding BSP tarball from the 'Board Support | ||
18 | Package (BSP) Downloads' page of the Yocto Project website. | ||
19 | |||
20 | Having done that, and assuming you extracted the BSP tarball contents | ||
21 | at the top-level of your yocto build tree, you can build a cedartrail | ||
22 | image by adding the location of the meta-cedartrail layer to | ||
23 | bblayers.conf e.g.: | ||
24 | |||
25 | yocto/meta-intel/meta-cedartrail \ | ||
26 | |||
27 | To enable the cedartrail layer, add the cedartrail MACHINE to local.conf: | ||
28 | |||
29 | MACHINE ?= "cedartrail" | ||
30 | |||
31 | You should then be able to build a cedartrail image as such: | ||
32 | |||
33 | $ source oe-init-build-env | ||
34 | $ bitbake core-image-sato | ||
35 | |||
36 | At the end of a successful build, you should have a live image that | ||
37 | you can boot from a USB flash drive (see instructions on how to do | ||
38 | that below, in the section 'Booting the images from /binary'). | ||
39 | |||
40 | As an alternative to downloading the BSP tarball, you can also work | ||
41 | directly from the meta-intel git repository. For each BSP in the | ||
42 | 'meta-intel' repository, there are multiple branches, one | ||
43 | corresponding to each major release starting with 'laverne' (0.90), in | ||
44 | addition to the latest code which tracks the current master. Instead | ||
45 | of extracting a BSP tarball at the top level of your yocto build tree, | ||
46 | you can equivalently check out the appropriate branch from the | ||
47 | meta-intel repository at the same location. | ||
48 | |||
49 | |||
50 | II. Booting the images in /binary | ||
51 | ================================== | ||
52 | |||
53 | This BSP contains bootable live images, which can be used to directly | ||
54 | boot Yocto off of a USB flash drive. | ||
55 | |||
56 | Under Linux, insert a USB flash drive. Assuming the USB flash drive | ||
57 | takes device /dev/sdf, use dd to copy the live image to it. For | ||
58 | example: | ||
59 | |||
60 | # dd if=core-image-sato-cedartrail-20111209003350.hddimg of=/dev/sdf | ||
61 | # sync | ||
62 | # eject /dev/sdf | ||
63 | |||
64 | This should give you a bootable USB flash device. Insert the device | ||
65 | into a bootable USB socket on the target, and power on. This should | ||
66 | result in a system booted to the Sato graphical desktop. | ||
67 | |||
68 | If you want a terminal, use the arrows at the top of the UI to move to | ||
69 | different pages of available applications, one of which is named | ||
70 | 'Terminal'. Clicking that should give you a root terminal. | ||
71 | |||
72 | If you want to ssh into the system, you can use the root terminal to | ||
73 | ifconfig the IP address and use that to ssh in. The root password is | ||
74 | empty, so to log in type 'root' for the user name and hit 'Enter' at | ||
75 | the Password prompt: and you should be in. | ||
76 | |||
77 | ---- | ||
78 | |||
79 | If you find you're getting corrupt images on the USB (it doesn't show | ||
80 | the syslinux boot: prompt, or the boot: prompt contains strange | ||
81 | characters), try doing this first: | ||
82 | |||
83 | # dd if=/dev/zero of=/dev/sdf bs=1M count=512 | ||