Qt Enterprise Embedded
Introduction
- Andy Nichols
- Digia
- Qt Developer
- freenode irc: nezticle
- twitter: @nezticle
Overview
- What is Qt Enterprise Embedded
- Operating System Choices
- Demonstration
- Example Usecase
What is Qt Enterprise Embedded?
Lightweight UI Stack
Ready-made images
Full QtCreator Integration
Emulator
Our Goal:
Embedded Development from day 1
Embedded Android or
Embedded Linux?
Embedded Android Benefits
- Optimised Builds
- Optimised and well tested drivers
- Use Android without fighting the existing UI
- Fully native applications, no Dalvik or JNI
Embedded Android Issues
- Bionic libc
- Truncated set of Supported Modules
- Must use NDK to build 3rd party libraries
Embedded Android Module Support
- Qt Core, Qt Gui, Qt Network, Qt Widgets, Qt XML
- Qt QML and Qt Quick
- Qt Quick Controls
- Qt Graphical Effects
- Qt Serial Port
- Qt Sensors
- Qt Multimedia
Embedded Android Reference Hardware
- iMX6 (Freescale)
- Beagleboard xM (TI)
- Nexus 7 (Tegra)
Embedded Linux
- All Qt 5.1 modules are supported (including QtWebkit)
- Standard Embedded Linux distro (Yocto, Poky)
- Many 3rd party API's available in Linux sysroot
Embedded Linux Hardware
- Beagleboard xM
- iMX6
- Raspberry Pi
- Beaglebone
- Sitara AM335x
Demonstration Time
Example Use-case: SuperfluousSynth
About SuperfluousSynth
- Hardware and Software combination
- A Keyboard that is also a learning aid
- Synthesis of instrument sounds
- Visual display of notes while playing
- Visual display of current note, interval or chord
3rd Party Dependencies
- fluidsynth - SoundFont 2 based software synthesizer
- Fluid (R3) General MIDI SoundFont (GM)
- VexFlow - Javascript Canvas2D API for drawing musical notation
Hardware Considerations
- USB MIDI keyboard controller
- LCD Screen
- Capacitive touch screen
- Audio Output
- iMX6 with 7" touch screen
Android or Linux
- glib2 dependency of fluidsynth
- MIDI input driver
- Audio Output (ALSA vs OpenSL)
- Embedded Linux
Implementation
- SynthEngine
- Musical Notation
- Chord Recognition
- Instrument Selection
Productisation
- Low latency tuning
- Professional design
- Virtual Keyboard
- Metronome
Questions?
Contact Info
- email: andy.nichols@digia.com
- freenode irc: nezticle
- example source: github.com/nezticle
Qt Enterprise Embedded
By nezticle
