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Internet of Things V2: DragonBoard™ bring up and community ecosystem

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课程 2（共 6 门，Specialization Internet of Things）

Do you want to develop skills to prototype embedded products using state-of-the-art technologies? In this course you will build a hardware and software development environment to guide your journey through the Internet of Things specialization courses. We will use the DragonBoard™ 410c single board computer (SBC). This is the first in a series of courses where you will learn both the theory and get the hands-on development practice needed to prototype Internet of Things products. This course is suitable for a broad range of learners. This course is for you if: - You want to learn how to use learn how to use Linux for embedded purposes. - You want to pivot your career towards the design and development of Internet of Things enabled products - You are an entrepreneur, innovator or member of a DIY community Learning Goals: After completing this course, you will be able to: 1) Know where you can find resources and help in the 96Boards ecosystem. 2) Describe the DragonBoard™ 410c peripherals, I/O expansion capabilities, Compute (CPU and Graphics) capabilities, and Connectivity capabilities. 3) Understand how to navigate and make use of the Linux terminal. 4) Configure at least one integrated development environment (IDE) for developing software. 5) Make use of Git and GitHub for version control purposes. 6) Create and build projects that interface with sensors and actuators through GPIO and Arduino.

从本节课中

Changing your Operating System (Supplemental / Optional)

The DragonBoard™ 410c is capable of running a variety of different operating systems, that being said you are free to chose the operating system that you find is best fit for you. Now, we understand that there is a diverse user base for this board and would like to cover as much as possible in this lesson so everyone can enjoy it! Whether you are a Windows user or a Mac user, or prefer Android over Ubuntu, there is a video or two here for you! In this lesson we will help you choose an operating system to best fit for your needs, we will then cover the download, flashing and installation process for all currently available operating systems. Because of the diverse nature of this board we will teach you multiple ways to flash your new operating system and provide a pro's and con's list for the different methods. By the end of this lesson switching between operating system will be easy and exciting for users of all skill levels.

Introduction to Lesson 3d0:44

Download Ubuntu binaries and bootloader3:03

Create Path Variable to binaries and bootloader3:36

Fastboot Flash onto eMMC5:45

A look back at Lesson 3d1:17

与讲师见面

Ganz Chockalingam
Principal Engineer
Qualcomm Institute of Calit2, UC, San Diego
Harinath Garudadri
Associate Research Scientist
Qualcomm Institute of Calit2, UC, San Diego

Now that we have downloaded our file, or I guess I should say all of the images and

stuff that we need to flash the operating system onto our board,

it's time to take a look at Uker's screen here and meet some path variables,

which you've already learned how to do but we're just gonna touch on again so

that we can do everything we need to do a little bit quicker.

>> All right, so when you're running on a Windows computer,

you just wanna open up the command prompt that comes with Windows MS DOS.

And so once you open that up you wanna go into your root C folder,

so you're gonna go up into your C folder.

And what we want to do is create a path variable that takes us

straight to the fastboot.exe file.

So the way to create a path variable in Windows is we start off with saying set.

And then we're going to type in the name of the pat variable we want.

So for me, I'm going to call it fastboot, all in lower case here, and

then we're going to do equals.

The important thing to remember here is that the difference between Linux and

Windows is that in Windows System, you want to use the back slash,

not the forward slash.

So we're going to start off with the Path right here.

C and then under Program Files.

Android, sdk, and you're gonna click

on platform-tools and fastboot.exe.

Let's make this bigger, here.

.exe and now what I've done is created a path variable

that takes me straight to the fastboot.exe.

So the next time I used the fastboot variable I can go straight to

the fastboot.exe.

Now I'm going to show you how to edit the flash all file.

Now, the flash all file >> The flash all file

is what came with your boot loader when you downloaded.

It was actually the first download that you made.

So inside there is a little script that we're going to edit now.

>> Yeah.

So what you want to do is you want to go into the folder that you downloaded

all the boot loader, the root file system, the boot image you want.

Go into that folder and have everything unzipped.

And once you have everything unzipped, you're going to scroll through them and

you're going to find something that says "flashall." So

you want to open that into a text writer, you can use notepad, and I'm going to use

this things called, what am I going to use here?

Here.

I'm just gonna use sublime text here.

So, as soon as you open that little file there,

you're gonna see a bunch of commands.

It's gonna say fastboot something, fastboot something, something.

So, like I mentioned a few minutes ago, you created a pathway we called fastboot.

So what we're gonna do is, we're gonna go between every fastboot word and

we're gonna enter the percentage sign just like that between each one.

So let's see that.

>> Yeah. So what the percentage sign is doing on

the front and back is essentially what the dollar sign does for the Linux version.

And essentially it's allowing you to call the path variable

that he just created earlier.

And the reason we use the lowercase fastboot for

our path variable is cuz we already knew that inside this

script they already had it set to the lowercase fastboot, right?

>> Yeah. >> So, if we wanted to call our path

variable x,

then we could just change that fastboot there within the percentage signs to x.

And it'll be the same thing.

>> And so what this file will do is,

once you execute this file, it'll fastboot everything in one go.

You don't have to go and fastboot flash every single file, so

it makes your life a lot easier.

So with that done, we'll see you in the next video and

show you exactly how to flash it.