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wiki:v2:hooking_up_pixy_to_a_raspberry_pi2 [2018/06/27 22:42] (current)
pixycam created
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 +====== 1. Introduction ======
  
 +The following procedure outlines the steps required to build the '​hello_pixy'​ example on a Raspberry Pi using the Raspberrian disribution. The '​hello\_pixy'​ example is a simple program that demonstrates how to read blocks and send commands to the Pixy over USB like PixyMon.
 +
 +You will need:
 +
 +  * SD Card with NOOBS 1.3.9 installed
 +  * USB Hub with at least three ports
 +  * Pixy updated to latest firmware (1.0.2)
 +  * libpixyusb version is 0.3
 +
 +NOOBS is available from the Raspberry Pi website here: http://​www.raspberrypi.org/​downloads/​
 +
 +
 +====== 2. Procedure ======
 +
 +
 +===== 2.1. Raspberry Pi Hardware Setup =====
 +
 +
 +==== 2.1.1. Connect your Raspberry Pi to the Internet ====
 +
 +Using an Ethernet cable, connect the Raspberry Pi to an internet source as shown below.
 +
 +{{wiki:​img:​c915bad8138d82804e0f7f1360e4bbb54877be2f.jpg?​400}}
 +
 +
 +==== 2.1.2. Connect your Raspberry Pi to a video display ====
 +
 +Using an HDMI cable, connect the Raspberry Pi to a video display as shown below.
 +
 +{{wiki:​img:​f3e7d4db3cdd88a0b0271ecee6465a8c3ec70a31.jpg?​400}}
 +
 +
 +==== 2.1.3. Connect Keyboard, Mouse, and Pixy to USB hub ====
 +
 +The Raspberry Pi only has two USB ports, so a hub is needed to connect Pixy, a keyboard, and mouse simultaneously. Using the hub, connect your keyboard, mouse, and Pixy to the Raspberry Pi.
 +
 +{{wiki:​img:​0ba4d834c473bc80612ef7d56b16f651885e1359.jpg?​400}}
 +
 +{{wiki:​img:​0f3cc1187a5d1786ac8475c3593760ca12faf4f4.jpg?​400}}
 +
 +
 +==== 2.1.4. Insert NOOBS SD Card ====
 +
 +{{wiki:​img:​fb504ec6eb8315298494cb0af421c2f1a7b0cd1b.jpg?​400}}
 +
 +
 +==== 2.1.5. Connect power to Raspberry Pi ====
 +
 +
 +===== 2.2. Raspberry Pi Software Setup =====
 +
 +
 +==== 2.2.1. Install Raspberrian ====
 +
 +On first boot, NOOBS will display a list of install options for the Raspberry Pi. Select Raspberrian and click the install button.
 +
 +{{wiki:​img:​3813c1ec648f985df1feb6dc07532fc5396cd02d.jpg?​400}}
 +
 +Click the '​Yes'​ button to confirm installing.
 +
 +{{wiki:​img:​c2c578b0804acf6d6de033b52a674c81f463ebd1.jpg?​400}}
 +
 +The installer will begin installing Raspberry Pi system files. This will take some time.
 +
 +{{wiki:​img:​ce2a12811782166aab553eeb45c023b5278056b6.jpg?​400}}
 +
 +When the installer is finished, click the '​OK'​ button to restart.
 +
 +{{wiki:​img:​60475cf88d2bc03143339e1526fe3f4671bb9511.jpg?​400}}
 +
 +When the Raspberry Pi boots, the configuration menu will be displayed. Select the '​Enable Boot to Desktop/​Scratch...'​ option.
 +
 +{{wiki:​img:​dc100ed14d7353cd103fbee235d9459b39f847f6.jpg?​400}}
 +
 +Select '​Desktop log in as user pi at the graphical desktop'​ and select '​OK'​.
 +
 +{{wiki:​img:​03b03c074fa339660ba61dce1662da34476ae320.jpg?​400}}
 +
 +Select '​Finish'​ to exit the configuration menu.
 +
 +{{wiki:​img:​796d1759f69b82f172558c9c1b92238d9a8e412c.jpg?​400}}
 +
 +Select '​Okay'​ to reboot.
 +
 +{{wiki:​img:​7fc275462ba3c4b1b4e9ee2a5b2a5a0c29c605ff.jpg?​400}}
 +
 +
 +===== 2.3. Software Dependency Installation =====
 +
 +From the Raspberry Pi desktop, start the LXTerminal application.
 +
 +{{wiki:​img:​d8ffb7ac38d09d2f5f35ab1bb3d57dd582f0b736.jpg?​400}}
 +
 +
 +==== 2.3.1. Install libusb ====
 +
 +In the terminal window type:
 +
 +''​%%sudo apt-get install libusb-1.0-0.dev%%''​
 +
 +
 +==== 2.3.2. Install libboost ====
 +
 +In the terminal window type:
 +
 +''​%%sudo apt-get install libboost-all-dev%%''​
 +
 +
 +==== 2.3.3. Install cmake ====
 +
 +In the terminal window type:
 +
 +''​%%sudo apt-get install cmake%%''​
 +
 +
 +===== 2.4. Install Pixy Source Code =====
 +
 +In the terminal window type:
 +
 +''​%%git clone https://​github.com/​charmedlabs/​pixy2.git%%''​
 +
 +
 +===== 2.5 Build and install libpixyusb =====
 +
 +
 +==== 2.5.1. Build the library ====
 +
 +In the terminal window type:
 +
 +''​%%cd pixy/​scripts%%''​\\
 +''​%%./​build_libpixyusb.sh%%''​
 +
 +
 +==== 2.5.2. Install the library ====
 +
 +In the terminal window type:
 +
 +''​%%sudo ./​install_libpixyusb.sh%%''​
 +
 +
 +===== 2.6. Running the '​hello_pixy'​ example =====
 +
 +
 +==== 2.6.1. Build the example ====
 +
 +In the terminal window type:
 +
 +''​%%./​build_hello_pixy.sh%%''​
 +
 +
 +==== 2.6.2. Run the example ====
 +
 +In the terminal window type:
 +
 +''​%%cd ../​build/​hello_pixy%%''​\\
 +''​%%sudo ./​hello_pixy%%''​
 +
 +The output should look like something below:
 +
 +''​%%Hello Pixy:​%%''​\\
 +''​%% Example Version: 0.3%%''​\\
 +''​%% Pixy Firmware Version: 1.0.2%%''​\\
 +''​%%Detecting blocks...%%''​\\
 +''​%%[sig:​ 1 w: 11 h: 17 x:149 y: 46]%%''​\\
 +''​%%[sig:​ 1 w:  9 h: 21 x:148 y: 46]%%''​\\
 +''​%%[sig:​ 1 w: 14 h: 21 x:151 y: 45]%%''​\\
 +''​%%[sig:​ 1 w: 10 h: 19 x:149 y: 47]%%''​\\
 +''​%%[sig:​ 1 w:  8 h: 16 x:148 y: 49]%%''​\\
 +''​%%[sig:​ 1 w:  9 h: 19 x:148 y: 45]%%''​\\
 +''​%%[sig:​ 1 w: 12 h:  6 x:150 y: 54]%%''​\\
 +''​%%[sig:​ 1 w: 15 h: 18 x:151 y: 46]%%''​\\
 +''​%%[sig:​ 1 w: 11 h:  5 x:149 y: 54]%%''​\\
 +''​%%[sig:​ 1 w:  9 h:  7 x:148 y: 49]%%''​\\
 +''​%%[sig:​ 1 w: 11 h:  5 x:149 y: 50]%%''​\\
 +''​%%[sig:​ 1 w:  8 h:  6 x:148 y: 47]%%''​\\
 +''​%%[sig:​ 1 w: 10 h:  7 x:149 y: 51]%%''​
 +
 +The example does the following
 +
 +  - Connects to Pixy using USB
 +  - Displays firmware version installed on Pixy
 +  - Block information is displayed if color signatures have been set and if the signatures are currently being detected by Pixy.

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wiki/v2/hooking_up_pixy_to_a_raspberry_pi2.txt · Last modified: 2018/06/27 22:42 by pixycam