poofjunior / rasppi-teensy-usb-servocontroller

A Python interface (using PyUSB) to drive up to 12 servos from a Teensyduino using the HID configuration.

Welcome to the USB-to-Sero-Controller Interface Project!

This program allows you to control servos from a custom USB device using the Python Programming language. In this case, the hardware interface is a Teensy 2.0 Development board. Theoretically, you can control up to 12 servos at once from a Python program.

The end goal is to provide the Raspberry Pi with high-level access (via Python) to low-level motor control via a hardware interface.

To get started, you'll need a combination of hardware and software before being able to run these examples:

Hardware:

• A Teensy 2.0
  Source: http://www.pjrc.com/store/teensy.html
• up to 12 servos connected to digital pins 0 through 13 (but NOT pin 11, the LED pin.

Software:

• PyUSB
  Source: http://sourceforge.net/apps/trac/pyusb/
• Arduino 1.0.1 Teensyduino installation
  Source: http://www.pjrc.com/teensy/teensyduino.html

Getting Started:

If you're completely new to servos with Arduino, you might find the link below quite handy to overcoming many typical problems: http://rcarduino.blogspot.com/2012/04/servo-problems-with-arduino-part-1.html Note, however, that this code snippet MUST be used with a Teensy, not an Arduino Uno.
To run the examples, simply install the necessary hardware and software, upload the Teensy sketch, and run the corresponding Python example.

Citations:

Riding on the shoulders of giants, this project would be impossible without the incredible starter code provided by Paul Stoffregen found in the examples tab under: File-->Examples-->Teensy-->USB_RawHID-->Basic.

Other sources can be found here:

• http://stackoverflow.com/questions/8218683/pyusb-cannot-set-configuration
• http://www.servocity.com/html/how_do_servos_work_.html