Latest revision as of 06:39, 27 February 2011

Here's a HOWTO on setting up Phigets C development environment on chumby.

Install GCC

• SSH into your device [view guide].
• type 'gcc' (without quote), you'll be prompt to download & install gcc package. You'll see something like this

chumby:~# gcc
GCC isn't on this device by default, but it's possible to download a
package and install it.  If you like, we can try fetching one from
http://files.chumby.com/hacks/falconwing_toolchain.sh and installing it.
Install toolchain? [Y/n] Y

It'll take a couple of minutes.

Install libusb & Phidgets library

• Download source code for libusb 0.1.12 here
• Download source code for Phidgets library here
• Download libstdc++.la file and save on a USB thumdrive (This is required by older libtool)
• Copy both libraries on to USB thumbdrive
• Connect the thumbdrive to your chumby
• Copy & extracted libraries source files to /mnt/storage

cp /mnt/usb/libusb-0.1.12.tar.gz /mnt/storage
cp /mnt/usb/libphidget_2.1.7.20110203.tar.gz /mnt/storage
cd /mnt/storage
tar xvf libusb-0.1.12.tar.gz
tar xvf libphidget_2.1.7.20110203.tar.gz

• Make chumby root filesystem writable and copy libstdc++.la (it's a tiny text file) to /lib to be used by libtool while compiling

mount -o remount,re /
cp /mnt/usb/libstdc++.la /lib

• Configure & compile libusb. We don't need to install libusb

cd /mnt/storage/libusb-0.1.12
./configure
make

• Copy header file & compiled libusb to libphidget folder

cp ./usb.h /mnt/storage/libphidget-2.1.7.20110203
cp ./.libs/libusb.a /mnt/storage/libphidget-2.1.7.20110203

• Configure & compile & install Phidgets library

cd /mnt/storage/libphidget-2.1.7.20110203
./configure
make
make install

• Done with the libraries, remount filesystem as read-only

mount -o remount,ro /

Compile Phidgets examples

• Download Phidgets Linux examples from here
• Get it on your chumby device with a USB thumbdrive as above
• Copy header file & compiled libphidget to examples folder

cd /mnt/storage/libphidget-2.1.7.20110203
cp ./phidget21.h /mnt/storage/phidget21-c-examples-2.1.7.20110203
cp ./.libs/phidget21.a /mnt/storage/phidget21-c-examples-2.1.7.20110203

• Configure & compile & all examples

cd /mnt/storage/phidget21-c-examples-2.1.7.20110203
./configure
make

That's it. Now we have a development environment to compile C/C++ code on your chumby. Try connecting Phidgets to chumby and run one of the examples.

Use 'gcc' directly to compile your own Phidgets application

gcc MyPhidgets.c -o MyPhidgets -lphidget21

Clean up

• Delete downloaded tarball

rm /mnt/storage/libusb-0.1.12.tar.gz
rm /mnt/storage/libphidget_2.1.7.20110203.tar.gz