Build Alexa SDK (AVS) image for i.mx7D PicoPi board (with Yocto Morty, Kernel4.9)

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Build Alexa SDK (AVS) image for i.mx7D PicoPi board (with Yocto Morty, Kernel4.9)

Build Alexa SDK (AVS) image for i.mx7D PicoPi board (with Yocto Morty, Kernel4.9)

Recipes to include Amazon's Alexa Voice Services in your applications.

Step 1 : Get iMX Yocto AVS setup environment

Review the steps under Chapter 3 of the i.MX_Yocto_Project_User'sGuide.pdf on the L4.X LINUX_DOCS to prepare your host machine. Including at least the following essential Yocto packages

$ sudo apt-get install gawk wget git-core diffstat unzip texinfo \
  gcc-multilib build-essential chrpath socat libsdl1.2-dev u-boot-tools

Install the i.MX NXP AVS repo

Create/Move to a directory where you want to install the AVS yocto build enviroment.

Let's call this as <yocto_dir>

$ cd <yocto_dir>
$ repo init -u https://source.codeaurora.org/external/imxsupport/meta-avs-demos -b master -m imx-alexa-sdk-4.9.11.xml

Download the AVS BSP build environment:

$ repo sync

Step 2: Setup yocto for Alexa_SDK image with AVS-SETUP-DEMO script:

Run the avs-setup-demo script as follows to setup your environment for the imx7d-pico board:

$ MACHINE=imx7d-pico DISTRO=fsl-imx-x11 source avs-setup-demo.sh -b <build_sdk>

Where <build_sdk> is the name you will give to your build folder.

After acepting the EULA the script will prompt if you want to enable: a

Sound Card selection

The following Sound Cards are supported on the build:

  • SGTL (In-board Audio Codec for PicoPi)
  • 2-Mic Synaptics/Conexant
  • 2-Mic TechNexion Voice Hat (with DSPConcepts SW)

The script will prompt to select the soundcard you will be using:

Which Sound Card are you going to use?
Sigmatel .............................. 1
Synaptics/Conexant .................... 2
VoiceHat (for DSPConcepts SW) ......... 3
Type the number of your selection and press Enter...

Install Alexa SDK

Next option is to select if you want to pre-install the AVS SDK software on the image.

Do you want to build/include the AVS_SDK package on this image(Y/N)?

If you select YES, then your image will contain the AVS SDK ready to use (after authentication). Note this AVS_SDK will not have WakeWord detection support, but it can be added on runtime.

If your selection was NO, then you can always manually fetch and build the AVS_SDK on runtime. All the packages dependencies will be already there, so only fetching the AVS_SDK source code and building it is required.

Install WiFi support

Te WiFi support is optional and requires to get from NXP an additional meta-picopi-wifi layer. Contact NXP to get this layer to be able to support WiFi on your image

The image will prompt:

Do you want to include WiFi support on this image(Y/N)?

Select YES if you already have the complementary meta-avs-demos-wifi layer

Finish avs-image configuration

At the end you will see a text according with the configuration you select for your image build.

Next is an example for a Preinstalled AVS_SDK with Synaptics Sound Card support and WiFi/BT not enabled for PicoPi board.

============================================================
AVS configuration is now ready at conf/local.conf
- Sound Card = Synaptics
- Alexa SDK 1.7 pre-installed
- Wifi supported
You are ready to bitbake your AVS demo image now:
bitbake avs-image
If you want to use QT5DisplayCards, use then:
bitbake avs-image-qt5
============================================================

Step 3: Build the AVS image

Go to your <build_sdk> directory and start the build of the avs-image

There are 2 options

  • Regular Build:

    $ cd  <yocto_dir>/<build_sdk>   
    $ bitbake avs-image
  • With QT5 support included:

    $ cd  <yocto_dir>/<build_sdk>   
    $ bitbake avs-image-qt5

The image with QT5 is useful if you want to add some GUI for example to render DisplayCards.


Step 4 : Deploying the built images to SD/MMC card to boot on target board.

After a build has succesfully completed, the created image resides at

<build_sdk>/tmp/deploy/images/imx7d-pico/

In this directory, you will find imx7d-pico-avs--.sdcard image or imx7d-pico-avs-qt5--.sdcard, depending on the build you chose on Step3.

To Flash the .sdcard image into the eMMC device of your PicoPi board follow the next steps:

  • Download the bootbomb flasher

  • Follow the instruction on Section 4. Board Reflashing of the Quick Start Guide for AVS kit to setup your board on flashing mode.

  • Copy the built SDCARD file

    $ sudo dd if=imx7d-pico-avs.sdcard of=/dev/sd<partition> bs=1M && sync
    $ sync
  • Properly eject the pico-imx7d board:

    $ sudo eject /dev/sd<partition>

NXP Documentation

Refer to the Quick Start Quide for AVS SDK to fully setup your PicoPi board with Synaptics 2Mic and PicoPi i.mx7D

For a more comprehensive understanding of Yocto, its features and setup; more image build and deployment options and customization, please take a look at the i.MX_Yocto_Project_User's_Guide.pdf document from the Linux documents bundle mentioned at the beginning of this document.

For a more detailed description of the Linux BSP, u-boot use and configuration, please take a look at the i.MX_Linux_User's_Guide.pdf document from the Linux documents bundle mentioned at the beginning of this document.

Comments

I appreciate the build instructions but as of August 22, 2018 a number of the upstream packages do not download rendering the demo unbuildable.

Following these instructions, I get:

1699:Installing perl-module-e.. ######################################## [ 99%]
1700:Installing perl-module-e.. ######################################## [ 99%]
1701:Installing perl-module-e.. ######################################## [ 99%]
1702:Installing perl-module-e.. ######################################## [ 99%]
1703:Installing perl-module-e.. ######################################## [ 99%]
1704:Installing perl-module-e.. ######################################## [ 99%]
1705:Installing perl-module-e.. ######################################## [ 99%]
1706:Installing perl-module-e.. ######################################## [100%]
error: Unknown error

util-linux-sfdisk
util-linux-sulogin
util-linux-swaponoff
util-linux-umount
v4l-utils
valgrind
vlan
volatile-binds
wireless-tools
wpa-supplicant
wpa-supplicant-cli
wpa-supplicant-passphrase
x11perf
x11vnc
xauth
xcursor-transparent-theme
xdotool
xdpyinfo
xf86-input-evdev
xf86-video-fbdev
xhost
xinit
xinput
xinput-calibrator
xkbcomp
xkeyboard-config
xmodmap
xprop
xrandr
xrestop
xserver-common
xserver-nodm-init
xserver-xf86-config
xserver-xorg
xset
xvideo-tests
xwininfo

2759.3MB of package files are needed. 3330.6MB will be used.

DEBUG: avs-image-1.0-r0 do_rootfs: Python function do_rootfs finished
ERROR: avs-image-1.0-r0 do_rootfs: Function failed: do_rootfs
ERROR: Logfile of failure stored in: /media/leisner/vdi/src/better-boards/mailnote/with-avs/tmp/work/imx7d_pico-poky-linux-gnueabi/avs-image/1.0-r0/temp/log.do_rootfs.30847
ERROR: Task (/media/leisner/vdi/src/better-boards/mailnote/sources/meta-avs-demos/recipes-avs/images/avs-image.bb:do_rootfs) failed with exit code '1'
DEBUG: Teardown for bitbake-worker
DEBUG: Teardown for bitbake-worker
NOTE: Tasks Summary: Attempted 7984 tasks of which 7983 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
/media/leisner/vdi/src/better-boards/mailnote/sources/meta-avs-demos/recipes-avs/images/avs-image.bb:do_rootfs
Summary: There was 1 WARNING message shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.

when I include the AVS sdk...

Unfortunately "unknown error" doesn't give much guidance.

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Version history
Last update:
‎09-10-2020 02:57 AM
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