The past few pays I’ve been trying to get the MCP23018 working with the Teensy 2.0. I’m doing this to replace the firmware in my ErgoDox with my own since I can’t the the original ergodox-firmware to work. Finally I got the Teensy<->MCP23018 communication working so here is a summary of my experience. ...
I’m looking at how to do a USRP clone. After evaluating a little bit the Altera Cyclone FPGA development/starter kits I realized that I would need an extra USB controller like the original USRP has. Right now, I’m trying to figure out how to use the Cypress FX2 CY7C68013, together with the FPGA. The USRP FAQ on FX2 CY7C68013 has proven quite helpful, also the Design of a hardware platform for narrow-band Software Defined Radio applications" by Kalen Watermeyer . ...
As part of my Xbee sensor project, I created an object oriented API to access HMC6352 compass functionality and I decided to make it downloadable as an Hmc6352 Arduino Library. Just unzip the file in the $arduino_home/hardware/libraries/. At the end you should end with $arduino_home/hardware/libraries/Hmc6352. The library includes an example on how to use it (in File ⇒ Sketchbook ⇒ Examples ⇒ Library-Hmc6352 ⇒ Hmc6352. The example looks like this (also available as gist): ...