Wednesday, December 7, 2022

Let’s Get Started With Intel Galileo

Krishna Gupta

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Connect regulated 5V supply to Galileo and then connect Galileo to the computer via USB cable only when the LED for USB client turns on. As you connect the board you will receive an error message, that there was some problem in installing the driver as shown in Fig. 5.

Open Device Manager by clicking Start→Control Panel→Systems→ Device Manager options. Under Other Devices you should see Gadget Serial v2.4. Update the driver from the option as shown in Fig. 6.

On the first pop-up window, click Browse my computer for driver software. Then, click Browse for the file location path. If you have installed Arduino in C: root drive, then browse the location to C:\arduino-1.5.3\hardware\arduino\x86\tools and click OK as shown in Fig. 7.

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After selecting the driver, click Next as shown in Fig. 8. On Windows security alert pop-up window, click Install.

After installation is complete, open Device Manager and locate Galileo com port under Ports (COM & LPT) option as shown in Fig. 9. Note the COM port number; you will need it while uploading software on Galileo.

Open Arduino IDE and select Tools→Board. Make sure that Intel Galileo is selected (Fig. 10).

Under Serial Port, select COM port on which Galileo board is connected (Fig. 11).

Software installation on Linux
Arduino software for Linux is in .tgz format. To extract the file you will need Tar tool. Before going ahead, remove Modem Manager System Service as it can hinder working with Galileo. Remove it by running the following command on the terminal:

 [stextbox id=”grey”]sudo apt-get remove modemmanager[/stextbox]

On the terminal, navigate to the folder in which Arduino IDE is downloaded (in this case, it is in Downloads) and extract the file by running the following commands:

 [stextbox id=”grey”]cd~/Downloads
tar -xzf
-C ~/[/stextbox]

Navigate to the extracted file and run Arduino by running the following commands:

 [stextbox id=”grey”]cd ~/arduino-1.5.3
sudo ./arduino[/stextbox]

(Arduino has been run as root because sometimes Arduino does not launch properly without root privilege.)

Fig. 18: Circuit for LED blinking example
Fig. 18: Circuit for LED blinking example
Fig. 19: Circuit for multiple blinking LEDs
Fig. 19: Circuit for multiple blinking LEDs

Driver installation. After software installation on the computer is complete, connect the board to the computer and install drivers.

Connect regulated 5V supply to Galileo and then connect Galileo to the computer via a USB cable.

On the terminal run the following command and note down the port of Galileo (in our case it is ACM0):

 [stextbox id=”grey”]ls /dev/ttyACM*[/stextbox]

In case you see an error message Java not found, install Java by running the following command:

 [stextbox id=”grey”]sudo apt-get install default-jre[/stextbox]

To select Serial Port, go to Tools→Serial Port→/dev/ttyACM0 (Fig. 11).

Software installation on Mac OS
For Mac, unzip the application and save it to the application folder. If you have other Arduino versions, you can save the file by any name, only keep in mind that there should be no spaces in the name. Run the application by double-clicking on it (Fig. 13).

Driver installation. Once software installation is complete, you need to install the driver using the following steps (also shown in Fig. 14):

Connect 5V DC power to the board and then the USB cable (power should always be the first connection on Galileo board).

Allow a few seconds for the board to boot up. Open System Information window to check if the board has been detected properly. Path for the same is: Hold Options→Apple menu→System Information. Under USB, check Gadget Serial v2.4 .

Under Network, check the name of your Galileo device; it should be similar to usbmodemxxxx. In this case it is fa21. Note the number as you will need it while uploading the code.

Go to Tools→ Serial Port→/dev/cu.usbmodemfa21 as shown in Fig. 15.

Fig. 20: Circuit of interfacing a potentiometer and LED
Fig. 20: Circuit of interfacing a potentiometer and LED
Fig. 21: Circuit of interfacing RGB LED
Fig. 21: Circuit of interfacing RGB LED

Uploading the code
The procedure for uploading Blink example code is the same for Windows, Linux and Mac OSes. To upload Blink example sketch, select the code from the path File→Examples →01.Basics→Blink (Fig. 16).

A new code will open. Click on Upload to upload the code (sketch) on the board. Status of the uploading is displayed on the bottom of the screen (Fig. 17).

When the upload is complete, you will see Transfer Complete message and pin 13 LED blinking on Intel Galileo board.

Some more examples

After successfully running our first LED blinking example, we can proceed to more examples like making LEDs to blink at various speeds, driving multiple LEDs with sequential effects, reading analogue input using simple potentiometer and driving RGB LEDs. So let us begin!

You need a breadboard, resistor, an LED and some jumper wires to set up the hardware. Though the board already has an LED connected to pin 13, we will connect an external LED to feel the experiment. Fritzing software comes handy when you do not have actual components with you. Here, we will use Intel Galileo Gen2 board image in Fritzing environment. (Intel Galileo Gen2 is the upgraded version of Intel Galileo.)

Blinking LED. Wire up the circuit with a 330-ohm resistor using Fritzing as shown in Fig. 18. You can change the blinking speed by varying the delays in blink.ino program.

Multiple LEDs. Let us move one step further and connect multiple LEDs. Connect the hardware as shown in Fritzing diagram (Fig. 19). All eight LEDs will turn on/off simultaneously and then create lighting sequences in both right and left directions as defined in sequence.ino code.

Reading potentiometer. In this experiment, we connect a potentiometer to the board as shown in Fig. 20. The code (potm.ino) reads the resistance values and controls the blinking rate of an LED at pin 13, corresponding to the position of the knob.

Driving RGB LED. RGB LED is another piece of hardware used here to have some more fun. Connect the hardware as shown in Fig. 21. Once you upload the code, you will see different colours generated from the RGB LED as defined in rgb.ino code.


Krishna Gupta is an electronics hobbyist

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