From BUGwiki

The Breakout Module

BUGvonHippel, named after Dr. Eric von Hippel of MIT, expands BUG connectivity with multiple interfaces.

Contents 1 Product Specifications 2 Hardware Documentation 3 Software Documentation 3.1 Drivers 3.2 OSGi Services 3.3 Web Services 3.4 Interfacing with the vonHippel in C 4 See Also

Product Specifications

• Standard Module Interfaces Exposed:
  • Standard USB Host connector
  • All other interfaces available in 0.100" pin field; can be equipped with breakaway headers for connector/ribbon cable interface, or wires directly soldered
  • I2C, multi-point digital control bus
  • SPI, digital control bus
  • 4-wire Serial port (in pin field; no DB9 connector)
  • I2S, digital audio bus
  • 4 GPIO (General Purpose I/O) digital lines, direct from Bug Base Unit CPU
  • 1 Interrupt input to Bug Base Unit CPU
  • 6 IOX (I/O Expander) digital lines, four with LED sites available

• Analog-to-Digital Converter:
  • Suitable for sensor inputs
  • 16-bit ADC
  • Accessed and controlled over I2C bus
  • Max rate of 15 samples/sec
  • 4 analog inputs, can be configured as four single-ended or two differential pairs
  • Input range GND to 5V
  • Includes integrated temperature sensor
  • ADC Datasheet and Hardware:Analog to Digital Converter HOWTO

• Digital-to-Analog Converter:
  • Suitable for control outputs
  • 8-bit DAC
  • Accessed and controlled over I2C bus
  • Max rate approximately 6k samples/sec (determined on I2C clock rate)
  • 2 analog outputs with programmable attenuation
  • Output range GND to 5V
  • DAC Datasheet

• Power Supply:
  • 5V power available in pin field
  • User adjustable power supply included as well, output 1.25-4.5V, available in pin field
  • Adjustable power supply is software programmable via the I2C bus with a non-volatile digital pot
  • Digital Potentiometer Datasheet

Hardware Documentation

• BUGvonHippel Hardware Design Spec (pdf)
• BUGvonHippel layout (pdf)
• BUGvonHippel schematic (pdf)
• BUGvonHippel BOM (pdf)
• BUGvonHippel gerber files (zip)
• BUGvonHippel Mechanical files (zip)

Software Documentation

Drivers

All BUG drivers can be found in github. The drivers are in the bug20-2.6.31-omap tree on github.

The BUGvonHippel drivers handle the basic operation of the module including:

• Powering the module on and off
• Setting the various interfaces
• Controlling digital-to-analog conversion process

OSGi Services

Method documentation for all OSGi services (from BUG and from other users) is available in the Software:Javadocs. The services listed below can be found in the com.buglabs.bug.module.vonHippel.pub package in the latest revision of the BUG javadocs. Each service is an interface with its own methods.

• IVonHippelModuleControl – Service for basic module controls & interaction with base
• gnu.io.SerialPort – rxtx-based Service for configuring serial port, reading & writing data

Web Services

When a VonHippel module is attached, the Vonhippel web service becomes available, providing the state of various pins (GPIO, IOX) on the module. Example:

<Status>
 <GPIO>
  <Pin number="0">1</Pin>
  <Pin number="1">1</Pin>
  <Pin number="2">1</Pin>
  <Pin number="3">1</Pin>
 </GPIO>
 <IOX>
  <Pin number="0">0</Pin>
  <Pin number="1">0</Pin>
  <Pin number="2">0</Pin>
  <Pin number="3">0</Pin>
  <Pin number="4">1</Pin>
  <Pin number="5">1</Pin>
 </IOX>
</Status>

Interfacing with the vonHippel in C

See Interfacing with BUGvonHippel in C for more information.

See Also