Long time, no see: Catching up with the QNX CAR Platform

By Megan Alink, Director of Marketing Communications for Automotive

It’s a fact — a person simply can’t be in two places at one time. I can’t, you can’t, and the demo team at QNX can’t (especially when they’re brainstorming exciting showcase projects for 2016… but that’s another blog. Note to self.) So what’s a QNX-loving, software-admiring, car aficionado to do when he or she has lost touch and wants to see the latest on the QNX CAR Platform for Infotainment? Video, my friends.

One of the latest additions to our QNX Cam YouTube channel is an update to a video made just over two and a half years ago, in which my colleague, Sheridan Ethier, took viewers on a feature-by-feature walkthrough of the QNX CAR Platform. Now, Sheridan’s back for another tour, so sit back and enjoy a good, old-fashioned catch-up with what’s been going on with our flagship automotive product (with time references, just in case you’re in a bit of a hurry).

Sheridan Ethier hits the road in the QNX reference vehicle based on a modified Jeep Wrangler, running the latest QNX CAR Platform for Infotainment.

We kick things off with a look at one of the most popular elements of an infotainment system — multimedia. Starting around the 01:30 mark, Sheridan shows how the QNX CAR Platform supports a variety of music formats and media sources, from the system’s own multimedia player to a brought-in device. And when your passenger is agitating to switch from the CCR playlist on your MP3 device to Meghan Trainor on her USB music collection, the platform’s fast detection and sync time means you’ll barely miss a head-bob.

The QNX CAR Platform’s native multimedia player — the “juke box” — is just one of many options for enjoying your music.

About five minutes in, we take a look at how the QNX CAR Platform implements voice recognition. Whether you’re seeking out a hot latté, navigating to the nearest airport, or calling a co-worker to say you’ll be a few minutes late, the QNX CAR Platform lets you do what you want to do while doing what you need to do — keeping your hands on the wheel and your eyes on the road. Don’t miss a look at concurrency (previously discussed here by Paul Leroux) during this segment, when Sheridan runs the results of his voice commands (multimedia, navigation, and a hands-free call) smoothly at the same time.

Using voice recognition, users can navigate to a destination by address or point of interest description (such as an airport).

At eight minutes, Sheridan tells us about one of the best examples of the flexibility of the QNX CAR Platform — its support for application environments, including native C/C++, Qt, HTML5, and APK for running Android applications. The platform’s audio management capability makes a cameo appearance when Sheridan switches between the native multimedia player and the Pandora HTML5 app.

Pandora is just one of the HTML5 applications supported by the QNX CAR Platform.

As Sheridan tells us (at approximately 12:00), the ability to project smartphone screens and applications into the vehicle is an important trend in automotive. With technologies like MirrorLink, users can access nearly all of the applications available on their smartphone right from the head unit.

Projection technologies like MirrorLink allow automakers to select which applications will be delivered to the vehicle’s head unit from the user’s connected smartphone. 

Finally, we take a look at two interesting features that differentiate the QNX CAR Platform — last mode persistence (e.g. when the song you were listening to when you turned the car off starts up at the same point when you turn the car back on) and fastboot (which, in the case of QNX CAR, can bring your backup camera to life in 0.8 seconds, far less than the NHTSA-mandated 2 seconds). These features work hand-in-hand to ensure a safer, more enjoyable, more responsive driving experience.

Fastboot in 0.8 seconds means that when you’re ready to reverse, your car is ready to show you the way.

Interested in learning more about the QNX CAR Platform for Infotainment? Check out Paul Leroux’s blog on the architecture of this sophisticated piece of software. To see QNX CAR in action, read Tina Jeffrey’s blog, in which she talks about how the platform was implemented in the reimagined QNX reference vehicle for CES 2015.

Check out the video here:

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A question of architecture

The second of a series on the QNX CAR Platform. In this installment, we start at the beginning — the platform’s underlying architecture.

In my previous post, I discussed how infotainment systems must perform multiple complex tasks, often all at once. At any time, a system may need to manage audio, show backup video, run 3D navigation, synch with Bluetooth devices, display smartphone content, run apps, present vehicle data, process voice signals, perform active noise control… the list goes on.

The job of integrating all these functions is no trivial task — an understatement if ever there was one. But as with any large project, starting with the right architecture, the right tools, and the right building blocks can make all the difference. With that in mind, let’s start at the beginning: the underlying architecture of the QNX CAR Platform for Infotainment.

The architecture consists of three layers: human machine interface (HMI), middleware, and platform.



The HMI layer
The HMI layer is like a bonus pack: it supports two reference HMIs out of the box, both of which have the same appearance and functionality. So what’s the difference? One is based on HTML5, the other on Qt 5. This choice demonstrates the underlying flexibility of the platform, which allows developers to create an HMI with any of several technologies, including HTML5, Qt, or a third-party toolkit such as Elektrobit GUIDE or Crank Storyboard.

A choice of HMIs

Mind you, the choice goes further than that. When you build a sophisticated infotainment system, it soon becomes obvious that no single tool or technology can do the job. The home screen, which may contain controls for Internet radio, hands-free calls, HVAC, and other functions, might need an environment like Qt. The navigation app, for its part, will probably use OpenGL ES. Meanwhile, some applications might be based on Android or HTML5. Together, all these heterogeneous components make up the HMI.

The QNX CAR Platform embraces this heterogeneity, allowing developers to use the best tools and application environments for the job at hand. More to the point, it allows developers to blend multiple app technologies into a single, unified user interface, where they can all share the same display, at the same time.

To perform this blending, the platform employs several mechanisms, including a component called the graphical composition manager . This manager acts as a kind of universal framework, providing all applications, regardless of how they’re built, with a highly optimized path to the display.

For example, look at the following HMI:



Now look at the HMI from another angle to see how it comprises several components blended together by the composition manger:



To the left, you see video input from a connected media player or smartphone. To the right, you see a navigation application based on OpenGL ES map-rendering software, with an overlay of route metadata implemented in Qt. And below, you see an HTML page that provides the underlying wallpaper; this page could also display a system status bar and UI menu bar across all screens.

For each component rendered to the display, the graphical composition manager allocates a separate window and frame buffer. It also allows the developer to control the properties of each individual window, including location, transparency, rotation, alpha, brightness, and z-order. As a result, it becomes relatively straightforward to tile, overlap, or blend a variety of applications on the same screen, in whichever way creates the best user experience.

The middleware layer
The middleware layer provides applications with a rich assortment of services, including Bluetooth, multimedia discovery and playback, navigation, radio, and automatic speech recognition (ASR). The ASR component, for example, can be used to turn on the radio, initiate a Bluetooth phone call from a connected smartphone, or select a song by artist or song title.

I’ll drill down into several of these services in upcoming posts. For now, I’d like to focus on a fundamental service that greatly simplifies how all other services and applications in the system interact with one another. It’s called persistent/publish subscribe messaging, or PPS, and it provides the abstraction needed to cleanly separate high-level applications from low-level business logic and services.

PPS messaging provides an abstraction layer between system services and high-level applications

Let’s rewind a minute. To implement communications between software components, C/C++ developers must typically define direct, point-to-point connections that tend to “break” when new features or requirements are introduced. For instance, an application communicates with a navigation engine, but all connections enabling that communication must be redefined when the system is updated with a different engine.

This fragility might be acceptable in a relatively simple system, but it creates a real bottleneck when you are developing something as complex, dynamic, and quickly evolving as the design for a modern infotainment system. PPS addresses the problem by allowing developers to create loose, flexible connections between components. As a result, it becomes much easier to add, remove, or replace components without having to modify other components.

So what, exactly, is PPS? Here’s a textbook answer: an asynchronous object-based system that consists of publishers and subscribers, where publishers modify the properties of data objects and the subscribers to those objects receive updates when the objects have been modified.

So what does that mean? Well, in a car, PPS data objects allow applications to access services such as the multimedia engine, voice recognition engine, vehicle buses, connected smartphones, hands-free calling, and contact databases. These data objects can each contain multiple attributes, each attribute providing access to a specific feature — such as the RPM of the engine, the level of brake fluid, or the frequency of the current radio station. System services publish these objects and modify their attributes; other programs can then subscribe to the objects and receive updates whenever the attributes change.

The PPS service is programming-language independent, allowing programs written in a variety of programming languages (C, C++, HTML5, Java, JavaScript, etc.) to intercommunicate, without any special knowledge of one another. Thus, an app in a high-level environment like HTML5 can easily access services provided by a device driver or other low-level service written in C or C++.

I’m only touching on the capabilities of PPS. To learn more, check out the QNX documentation on this service.

The platform layer
The platform layer includes the QNX OS and the board support packages, or BSPs, that allow the OS to run on various hardware platforms.

An inherently modular and extensible architecture

A BSP may not sound like the sexiest thing in the world — it is, admittedly, a deeply technical piece of software — but without it, nothing else works. And, in fact, one reason QNX Software Systems has such a strong presence in automotive is that it provides BSPs for all the popular infotainment platforms from companies like Freescale, NVIDIA, Qualcomm, and Texas Instruments.

As for the QNX Neutrino OS, you could write a book about it — which is another way of saying it’s far beyond the scope of this post. Suffice it to say that its modularity, extensibility, reliability, and performance set the tone for the entire QNX CAR Platform. To get a feel for what the QNX OS brings to the platform (and by extension, to the automotive industry), I invite you to visit the QNX Neutrino OS page on the QNX website.

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A question of concurrency

The first of a new series on the QNX CAR Platform for Infotainment. In this installment, I tackle the a priori question: why does the auto industry need this platform, anyway?

Define your terms, counseled Voltaire, and in keeping with his advice, allow me to begin with the following:

Con•cur•ren•cy \kən-kûr'-ən-sē\ n (1597) Cooperation, as of agents, circumstances, or events; agreement or union in action.

A good definition, as far as it goes. But it doesn’t go far enough for the purposes of this discussion. Wikipedia comes closer to the mark:

“In computer science, concurrency is a property of systems in which several computations execute simultaneously, and potentially interact with each other.”

That’s better, but it still falls short. However, the Wikipedia entry also states that:

“the base goals of concurrent programming include correctness, performance and robustness. Concurrent systems… are generally designed to operate indefinitely, including automatic recovery from failure, and not terminate unexpectedly.”

Now that’s more like it. Concurrency in computer systems isn’t simply a matter of doing several things all at once; it’s also a matter of delivering a solid user experience. The system must always be available and it must always be responsive: no “surprises” allowed.

This definition seems tailored-made for in-car infotainment systems. Here, for example, are some of the tasks that an infotainment system may perform:

• Run a variety of user applications, from 3D navigation to Internet radio, based on a mix of technologies, including Qt, HTML5, Android, and OpenGL ES
• Manage multiple forms of input: voice, touch, physical buttons, etc. 
• Support multiple smartphone connectivity protocols such as MirrorLink and Apple CarPlay 
• Perform services that smartphones cannot support, including:
  
  • HVAC control
  • discovery and playback of multimedia from USB sticks, DLNA devices, MTP devices, and other sources
  • retrieval and display of fuel levels, tire pressure, and other vehicle information
  • connectivity to Bluetooth devices
• Process voice signals to ensure the best possible quality of phone-based hands-free systems — this in itself can involve many tasks, including echo and noise removal, dynamic noise shaping, speech enhancement, etc. 
• Perform active noise control to eliminate unwanted engine “boom” noise 
• Offer extremely fast bootup times; a backup camera, for example, must come up within a second or two to be useful
   

Jugging multiple concurrent tasks

The primary user of an infotainment system is the driver. So, despite juggling all these activities, an infotainment system must never show the strain. It must always respond quickly to user input and critical events, even when many activities compete for system resources. Otherwise, the driver will become annoyed or, worse, distracted. The passengers won’t be happy, either.

Still, that isn’t enough. Automakers also need to differentiate themselves, and infotainment serves as a key tool for achieving differentiation. So the infotainment system must not simply perform well; it must also allow the vehicle, or line of vehicles, to project the unique values, features, and brand identity of the automaker.

And even that isn’t enough. Most automakers offer multiple vehicle lines, each encompassing a variety of configurations and trim levels. So an infotainment design must also be scalable; that way, the work and investment made at the high end can be leveraged in mid-range and economy models. Because ROI.

Projecting a unique identity

But you know what? That still isn’t enough. An infotainment system design must also be flexible. It must, for example, support new functionality through software updates, whether such updates are installed through a storage device or over the air. And it must have the ability to accommodate quickly evolving connectivity protocols, app environments, and hardware platforms. All with the least possible fuss.

The nitty and the gritty
Concurrency, performance, reliability, differentiation, scalability, flexibility — a tall order. But it’s exactly the order that the QNX CAR Platform for Infotainment was designed to fill.

Take, for example, product differentiation. If you look at the QNX-powered infotainment systems that automakers are shipping today, one thing becomes obvious: they aren’t cookie-cutter systems. Rather, they each project the unique values, features, and brand identity of each automaker — even though they are all built on the same, standards-based platform.

So how does the QNX CAR Platform enable all this? That’s exactly what my colleagues and I will explore over the coming weeks and months. We’ll get into the nitty and sometimes the gritty of how the platform works and why it offers so much value to companies that develop infotainment systems in various shapes, forms, and price points.

Stay tuned.

POSTSCRIPT: Read the next installment of the QNX CAR Platform series, A question of architecture.

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A glaring look at rear-view mirrors

Some reflections on the challenge of looking backwards, followed by the vexing question: where, exactly, should video from a backup camera be displayed?

Mirror, mirror, above the dash, stop the glare and make it last! Okay, maybe I've been watching too many Netflix reruns of Bewitched. But mirror glare, typically caused by bright headlights, is a problem — and a dangerous one. It can create temporary blind spots on your retina, leaving you unable to see cars or pedestrians on the road around you.

Automotive manufacturers have offered solutions to this problem for decades. For instance, many car mirrors now employ electrochromism, which allows the mirror to dim automatically in response to headlights and other light sources. But when, exactly, did the first anti-glare mirrors come to market?

According to Wikipedia, the first manual-tilt day/night mirrors appeared in the 1930s. These mirrors typically use a prismatic, wedge-shaped design in which the rear surface (which is silvered) and the front surface (which is plain glass) are at angles to each other. In day view, you see light reflected off the silvered rear surface. But when you tilt the mirror to night view, you see light reflected off the unsilvered front surface, which, of course, has less glare.

Manual-tilt day/night mirrors may have debuted in the 30s, but they were still a novelty in the 50s. Witness this article from the September 1950 issue of Popular Science:



True to their name, manual-tilt mirrors require manual intervention: You have to take your hand off the wheel to adjust them, after you’ve been blinded by glare. Which is why, as early as 1958, Chrysler was demonstrating mirrors that could tilt automatically, as shown in this article from the October 1958 issue of Mechanix Illustrated:


Images: Modern Mechanix blog

Fast-forward to backup cameras
Electrochromic mirrors, which darken electronically, have done away with the need to tilt, either manually or automatically. But despite their sophistication, they still can't overcome the inherent drawbacks of rear-view mirrors, which provide only a partial view of the area behind the vehicle — a limitation that contributes to backover accidents, many of them involving small children. Which is why NHTSA has mandated the use of backup cameras by 2018 and why the last two QNX technology concept cars have shown how video from backup cameras can be integrated with other content in a digital instrument cluster.

Actually, this raises the question: just where should backup video be displayed? In the cluster, as demonstrated in our concept cars? Or in the head unit, the rear-view mirror, or a dedicated screen? The NHTSA ruling doesn’t mandate a specific device or location, which isn't surprising, as each has its own advantages and disadvantages.

Consider, for example, ease of use: Will drivers find one location more intuitive and less distracting than the alternatives? In all likelihood, the answer will vary from driver to driver and will depend on individual cognitive styles, driving habits, and vehicle design.

Another issue is speed of response. According to NHTSA’s ruling, any device displaying backup video must do so within 2.5 seconds of the car shifting into the reverse. Problem is, the ease of complying with this requirement depends on the device in question. For instance, NHTSA acknowledges that “in-mirror displays (which are only activated when the reverse gear is selected) may require additional warm-up time when compared to in-dash displays (which may be already in use for other purposes such as route navigation).”

At first blush, in-dash displays such as head units and digital clusters have the advantage here. But let’s remember that booting quickly can be a challenge for these systems because of their greater complexity — many offer a considerable amount of functionality. So imagine what happens when the driver turns the ignition key and almost immediately shifts into reverse. In that case, the cluster or head unit must boot up and display backup video within a handful of seconds. It's important, then, that system designers choose an OS that not only supports rich functionality, but also allows the system to start up and initialize applications in the least time possible.

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Some forward-thinking on looking backwards

The first rear-view camera appeared on a concept car in 1956. It's time to go mainstream.

Until today, I knew nothing about electrochromism — I didn’t even know the word existed! Mind you, I still don’t know that much. But I do know a little, so if you’re in the dark about this phenomenon, let me enlighten you: It’s what allows smart windows to dim automatically in response to bright light.

A full-on technical explanation of electrochromism could fill pages. But in a nutshell, electrochromic glass contains a substance, such as tungsten trioxide, that changes color when you apply a small jolt of electricity to it. Apply a jolt, and the glass goes dark; apply another jolt, and the glass becomes transparent again. Pretty cool, right?

Automakers must think so, because they use this technology to create rear-view and side-view mirrors that dim automatically to reduce glare — just the thing when the &*^%$! driver behind you flips on his high-beams. Using photo sensors, these mirrors measure incoming light; when it becomes too bright, the mirror applies the requisite electrical charge and, voilà, no more fried retinas. (I jest, but in reality, mirror glare can cause retinal blind spots that affect driver reaction time.)

So why am I blabbing about this? Because electrochromic technology highlights a century-old challenge: How do you see what — or who — is behind your car? And how do you do it even in harsh lighting conditions? It’s a hard problem to solve, and it’s been with us ever since Dorothy Levitt, a pioneer of motor racing, counseled women to “hold aloft” a handheld mirror “to see behind while driving.” That was in 1906.

Kludges
For sure, we’ve made progress over the years. But we still fall back on kludges to compensate for the inherent shortcomings of placing a mirror meters away from the back of the vehicle. Consider, for example, the aftermarket wide-angle lenses that you can attach to your rear window — a viable solution for some vehicles, but not terribly useful if you are driving a pickup or fastback.

Small wonder that NHTSA has ruled that, as of May 2018, all vehicles under 10,000 pounds must ship with “rear visibility technology” that expands the driver’s field of view to include a 10x20-foot zone directly behind the vehicle. Every year, backover crashes in the US cause 210 fatalities and 15,000 injuries — many involving children. NHTSA believes that universal deployment of rear-view cameras, which “see” where rear-view mirrors cannot, will help reduce backover fatalities by about a third.

Buick is among the automotive brands that are “pre-complying” with the standard: every 2015 Buick model will ship with a rearview camera. Which, perhaps, is no surprise: the first Buick to sport a rearview camera was the Centurion concept car, which debuted in 1956:


1956 Buick Centurion: You can see the backup camera just above the center tail light.

The Centurion’s backup camera is one of many forward-looking concepts that automakers have demonstrated over the years. As I have discussed in previous posts, many of these ideas took decades to come to market, for the simple reason they were ahead of their time — the technology needed to make them successful was too immature or simply didn’t exist yet.

Giving cameras the (fast) boot
Fortunately, the various technologies that enable rear-view cameras for cars have reached a sufficient level of maturity, miniaturization, and cost effectiveness. Nonetheless, challenges remain. For example, NHTSA specifies that rear-view cameras meet a number of requirements, including image size, response time, linger time (how long the camera remains activated after shifting from reverse), and durability. Many of these requirements are made to order for a platform like the QNX OS, which combines high reliability with very fast bootup and response times. After all, what’s the use of backup camera if it finishes booting *after* you back out of your driveway?


Instrument cluster in QNX technology concept car displaying video from a backup camera.

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The need for green in automotive

The need for environmentally friendly practices and products has become so painfully obvious in recent years that it’s no longer possible to call it a debate or a controversy. Nowhere is this more conspicuous than in the automotive industry.

“The personal automobile is the single greatest polluter as emissions from millions of vehicles on the road add up.”— US Environmental Protection Agency

Working at QNX has given me insight into just how complex the problem is and how going green in automotive is not going to be a revolution. I've come to realize that it will require a good number of players on a large number of fronts.

An example of what happens when
your car takes way too long to boot. :-)

What we at QNX are doing to move the cause forward is called fast booting. Some operating systems take up to 60 seconds to boot. Can you imagine getting in your car, turning the ignition, and waiting a minute for your radio to work? Me either.

To prevent such undignified delays, these systems typically do not power down completely. Instead, they suspend to RAM while the vehicle is off. This lets the system boot ‘instantly’ whenever the ignition turns over. But because there’s a small current draw to keep RAM alive, this trickle continually drains the battery. This might have minimal consequences today (other than cost to the manufacturer, which is a whole other story) but in the brave new world of electric and hybrid cars, battery capacity equals mileage. Typical systems thus shorten the range of green vehicles and, in the case of hybrids, force drivers to use not-so-green systems more often. More importantly perhaps, these systems give would-be buyers ‘range anxiety’. Indeed, according to the Green Market’s Richard Matthews, battery life is one of the top reasons the current adoption rate is so low.

A little-known feature of QNX technology helps solve this problem.

Architects using the QNX OS can organize the boot process to bring up complex systems in a matter of seconds. Ours is not an all-or-nothing proposition as it is with monolithic operating systems that must load an entire system before anything can run – Windows and Linux are prime examples. QNX supports a gradual phasing in of system functionality to get critical systems up and running while it loads less-essential features in the background. A QNX-based system can start from a cold boot every time. Which means no battery drain while the car is off.

And while this is no giant leap for mankind it is certainly a solid step in the right direction. If the rest of us (consumers, that is) contributed similarly by trading in our clunkers for greener wheels, the industry could undoubtedly move forward in leaps and bounds. I suppose this means I’m going to have to take a long hard look at my 2003 Honda Civic.
 

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