How to use the Pixy

[414cnewq]

My team is thinking about buying a PixyCam for the SteamWorks Season and was wondering how to hook up the PixyCam and how to use it. Are there any tutorials? Would prefer direct connection to roboRio

[Harrison.Smith]

http://www.cmucam.org/projects/cmucam5/wiki Has a ton of info regarding how to setup, connect, etc with the pixy.

[AlexanderLuke]

This recent thread about the Pixy Camera may also be helpful to you:

https://www.chiefdelphi.com/forums/s...highlight=pixy

[billbo911]

According to the information on the AndyMark web site, the PixieCam does both the acquisition and the processing of the image.

Pixy CMUcam5 Image Sensor is a fast vision sensor you can quickly "teach" to find objects. It connects directly to Arduino and other controllers. Pixy pairs a powerful dedicated processor and image sensor. Pixy processes images from the image sensor and only sends the useful information (e.g. purple dinosaur detected at x=54, y=103) to your microcontroller. The information is available through one of several interfaces: UART serial, SPI, I2C, USB, or digital/analog output so your Arduino or other microcontroller can talk easily with Pixy and still have plenty of CPU available for other tasks.

This means it will indeed connect directly to the RoboRio, but only send target location information.

[Coach Seb]

Any detail on how it connects to the RoboRio and what data should we expect ?

[chesterm]

We will be using a Pixy this year connecting via I2C and using C++. X, Y, Width, and Height are the values normally used. X = 0-319 pixels and Y = 0-200 pixels from the Pixy's field of view (0,0 is bottom left). The Pixy will send data for every object it detects, but this can be controlled to a certain number via the Pixymon setup application (connect via usb cable to windows pc). Exposure and other settings are done via the Pixymon program.

[rockinthespecs]

Does anyone have code for connecting to the pixy through labVIEW? I have gotten the camera set up with pixyMon, and I have tried to set it up through the SPI port but it has not been successful.

[Hadi379]

Originally Posted by rockinthespecs

Does anyone have code for connecting to the pixy through labVIEW? I have gotten the camera set up with pixyMon, and I have tried to set it up through the SPI port but it has not been successful.

We have it working with labview, but we are connecting using the analog/digital connection. I'd have to check with my programming team to be sure, but I know were not getting all the info other teams are through other forms of connections like SPI or I2C.

For the most part, were getting a voltage between 0-3.3V, if the object is on the left edge of the screen, the pixy outputs a voltage closer to 0, and if its on the right edge of the screen, it outputs a value of 3.3v. Therefore, if the object is centered, you should get a voltage of around 1.65v.

I believe they converted the voltage to degrees and are using that to track the target. I'm not sure a gyro is even necessary to make this work, they have our robot tracking with no gyro on board currently.