CHDK-PTP-Java

Pure Java (jsr80 usb) interface to the Canon cameras running CHDK PTP

Interface reference https://github.com/c10ud/CHDK/blob/master/core/ptp.h (not found anymore, so this may be the same?: https://github.com/DIYBookScanner/chdk/blob/master/chdk/core/ptp.h)

Introduction

Forked from https://github.com/acamilo/CHDK-PTP-Java on Wednesday, 18 November 2020.

Values added:

• Migrating it to a Maven project.
• Adding Code formatting plugin
• fixed typos
• Adding Canon A2200 camera (LiveViewDemo working)

Using in other project

This code is has mirrored public repository available under: https://git.man.poznan.pl/stash/projects/KWE/repos/chdk-ptp-java/browse

Artifacts and maven repository

The codes found there are automatically tested and built as artifacts using Jenkins CI server and uploaded to maven repository: https://maven.man.poznan.pl/repository/webapp/browserepo.html?pathId=kiwi-libs-snapshots:org/chdk/ptp/java/CHDK-PTP-Java

Which can be later used in gradle project by simply defining the repository maven address:

repositories
{
    maven() { url 'https://maven.man.poznan.pl/repository/kiwi-repo' } // virtual repo
}

and adding appropriate entry in build.gradle or relevant in pom.xml

dependencies
{
	compile 'org.chdk.ptp.java:CHDK-PTP-Java:+'
}	

Versioning

For the sake of usability, rapid development and usage sanity we use semantic versioning: http://semver.org/

Example Usage

Try to follow chdk.ptp.java.standalone.LiveViewApiDemo.java but part of the example is below:

	    cam = CameraFactory.getCamera(SupportedCamera.SX160IS);
	    cam.connect();
	    cam.setOperaionMode(CameraMode.RECORD);
	    int i = 0;
	    BufferedImagePanel d = new BufferedImagePanel(cam.getView()); // displays live view
	    Random random = new Random();
	    while (true) {
		d.setImage(cam.getView());
		++i;
		cam.setZoom(i % 100);
		if (i % 40 == 0) {
		    cam.setZoom(random.nextInt(100));
		}

		if (i % 8 == 0) {
			cam.setZoom(random.nextInt(100));
			cam.setFocus(random.nextInt(1000) + 100);
		}
		cam.setFocusMode(FocusMode.AUTO);
	    }

Installation

Download gradle

cd ~/
wget https://services.gradle.org/distributions/gradle-2.2-bin.zip
unzip gradle-2.2-bin.zip
echo "export PATH=\$PATH:$HOME/gradle-2.2/bin" >> ~/.bashrc
source ~/.bashrc

Set-up gradle

Artifactory plugin requires a file

$HOME\.gradle

to be created and filled with the following two lines:

USER=wont_be_used
PASSWORD=but_needs_to_be_here

Eclipse integration

Spring offers Gradle integration which can be acquired from: https://github.com/spring-projects/eclipse-integration-gradle

Check out project

Use console git:

mkdir ~/git
cd ~/git
git clone https://github.com/acamilo/CHDK-PTP-Java.git

or Eclipse plugin.

Build

cd CHDK-PTP-Java
gradle build

Open in eclipse

Import Gradle Project from within Eclipse.

other problems

I.E Afternoon wasters...

on some OSes gvfs will grab the PTP device and you'll get this error.

javax.usb.UsbPlatformException: USB error 6: Unable to claim interface: Resource busy

The solution in ubuntu is this.

gsettings set org.gnome.desktop.media-handling automount false

To un do this change false to true.

Sometimes, cam.setRecordingMode() will fail but the camera will otherise be responsive.

see thread: http://chdk.setepontos.com/index.php?topic=10664.10

solition is to either kill gvfs-gphoto2-volume-monitor or to make it perminent, change it's name so it doesn't start.

Other OSes

This uses libusb4java so it probably works in windows and mac. I've never tried it though.

USB IDs

http://www.linux-usb.org/usb.ids

04a9 Canon, Inc. - 322a PowerShot A2200