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AVR Bus-Pirate-a-like
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <style type="text/css"><!-- body,td,a,p{font-family:Optima,Verdana,arial,sans-serif;text-align:justify} /*body,td,a,p{text-align:justify}*/ body{line-height:1.5;margin-left:3.5em;margin-right:2em; max-width:50em; background-color: #ffffff; color: #000000} h1,h2,h3,h4{font-family:helvetica,sans-serif;text-align:left} #box{float:right;border:thin solid #000000; margin:1em;padding:1em;width:20em} #box li{display:block} #box p{text-align:center} .littler{ font-size: smaller; } .little{ font-size: small; } table { border-collapse:collapse; margin:1em} td { border:thin solid #000000; padding:4px; font-family:monospace} th { background-color:#BBBBBB; color:white; border:thin solid #000000; padding:4px; } //--> </style> <title>Bus Ninja</title> </head> <body> <div id="box"> <p> <b><a href="../busninja-1.0.tar.gz">Download bus-ninja-1.0.tar.gz</a><br></b> <b><a href="precompiled/ninja-arduino-diecemilia-atmega168.hex">Download .HEX file for Arduino Diecemilia</a><br></b> <a href="src">Browse source</a><br> <a href="hardware">Example AT90USB162 Schematic + PCB</a><br> </p> </div> <h1>Bus Ninja</h1> <p> A <a href="http://code.google.com/p/the-bus-pirate/">Bus Pirate</a> clone for Atmel AVR microcontrollers, including the <a href="http://www.arduino.cc/">Arduino</a> and <a href="http://www.pjrc.com/teensy/">Teensy</a>. Featuring a serial console, I2C, SPI and more. On the USB enabled AVRs (AT90USBxxxx and ATMEGAxxUx) USB over serial is used, allowing for single chip Bus Ninja hardware. </p> <p> Bus Ninja lets you quickly protoype with I2C and SPI devices without writing any code. Just wire up a device to your board and start talking to it directly from the Bus Ninja console. </p> <h3>Features</h3> <ul> <li>Interactive shell with Bus Pirate like syntax <li>I2C (soft i2c driver from userial) <ul> <li>I2C address scanner ('s' command from i2c mode) </ul> <li>SPI <li>Flow controlled USB CDC (serial) (AT90USBxxxx/ATMEGAxxUx only) <li>Modular software making it straightforward to add <ul> <li>New commands <li>New buses <li>New USB gadgets - mass storage EEPROM interface, HID devices, etc. (AT90USBxxxx/ATMEGAxxUx only) </ul> </ul> <h3>Core commands</h3> <p> <pre>> help</pre> Print list of available commands </p> <p> <pre>> version</pre> Print build string </p> <p> <pre>> reset</pre> Reset board </p> <p> <pre>> spi</pre> Enter SPI bus mode </p> <p> <pre>> i2c</pre> Enter i2c bus mode </p> <p> <pre>> led <0-6></pre> Set LED pattern </p> <h3>Wiring</h3> <p> When connecting up I2C and SPI devices, signals should be connected the pins below. For Teensy, use the AT90USBxxxx variants. </p> <p> <table> <tr><th>Function</th><th>Arduino pin</th><th>AT90USBxxxx/ATMEGAxxUx pin</th</tr> <tr><td>I2C SDA</td><td>Analog 4 (PORTC4)</td><td>PORTB2</td></tr> <tr><td>I2C SCL</td><td>Analog 5 (PORTC5)</td><td>PORTB1</td></tr> <tr><td>SPI CLK</td><td>Digital 13 (PORTB5)</td><td>PORTB1</td></tr> <tr><td>SPI MISO</td><td>Digital 12 (PORTB4)</td><td>PORTB3</td></tr> <tr><td>SPI MOSI</td><td>Digital 11 (PORTB3)</td><td>PORTB2</td></tr> <tr><td>SPI CS</td><td>Digital 9 (PORTB1)</td><td>PORTB4</td></tr> <tr><td>LED</td><td>Digital 2 (PORTD2)</td><td>PORTD4</td></tr> </table> </p> <h3>Bus commands</h3> Once a bus mode is selected (i2c/spi), bus commands can be sent. See the <a href="http://dangerousprototypes.com/bus-pirate-manual/#syntax">Bus Pirate manuals</a> for more details: Eg. <pre> > spi > [0x40 0x0A 0x28] CS ENABLED WRITE: 0x40 WRITE: 0x0A WRITE: 0x28 CS DISABLED </pre> (see also the command examples in the <a href="test">test/</a> directory) <h3>Arduino Examples</h3> <h4>Controlling an LED</h4> To prove that the Bus Ninja software is working on your Arduino, start by controlling an LED. Connect the anode of your LED to digital pin 2 and the cathode to ground (it would be wise to also add a current limiting resistor in series, say 220R). Connect to the Arduino's serial port with your favourite terminal emulator at 8-N-1 9600bps. <pre> screen /dev/ttyUSB0 9600 </pre> Type <cite>led</cite> followed by an integer from 0-6 to set the LED fade pattern. <h4>Controlling a Microchip MCP23S17 SPI 16-bit I/O expander</h4> <p> <img src="test/spi/MCP23S17-breadboard.jpg"> <img src="test/spi/MCP23S17-pinout.png"> </p> <p> Wire the chip to the Arduino like this: <table> <tr><th>MCP23S17</th><th>Arduino</th></tr> <tr><td>VDD</td><td>5V</td></tr> <tr><td>VSS</td><td>GND</td></tr> <tr><td>SO</td><td>SPI MISO (Digital 12)</td></tr> <tr><td>SI</td><td>SPI MOSI (Digital 11)</td></tr> <tr><td>CS</td><td>SPI CS (Digital 9)</td></tr> <tr><td>SCK</td><td>SPI CLK (Digital 13)</td></tr> <tr><td>Reset</td><td>5V</td></tr> </table> <p> Connect an LED, voltmeter or oscilloscope to GPA0. Then, open the Bus Ninja serial console and enter commands. </p> Enter SPI mode<br> <pre> spi </pre> Initialise the chip for non-sequential access<br> <pre> [0x40 0x0A 0x28] # WR_REG(0) IOCONA SEQ_OFF|HAEN </pre> Set all of PORTA as outputs<br> <pre> [0x40 0x00 0x00] # WR_REG(0) GPIOADIR ALL_OUTPUT </pre> Set GPIOA-0 high<br> <pre> [0x40 0x12 0x01] # WR_REG(0) GPIOA GPIOA-0 </pre> Set GPIOA-0 low<br> <pre> [0x40 0x12 0x00] # WR_REG(0) GPIOA GPIOA-0 </pre> </p> <h4>Controlling a Microchip 24LC16B I2C EEPROM</h4> <p> <img src="test/i2c/24LC16B-breadboard.jpg"> <img src="test/i2c/24LC16B-pinout.png"> </p> <p> Wire the chip to the Arduino like this: <table> <tr><th>24LC16B</th><th>Arduino</th></tr> <tr><td>VCC</td><td>5V</td></tr> <tr><td>VSS</td><td>GND</td></tr> <tr><td>SDA</td><td>I2C SDA (Analog 4)</td></tr> <tr><td>SI</td><td>I2C SCL (Analog 5)</td></tr> <tr><td>Reset</td><td>5V</td></tr> </table> <p> <b>For I2C to properly function you must add two pullup resistors. One from SDA to 5V, one from SCL to 5V.</b> </p> Enter I2C mode<br> <pre> i2c </pre> Write {0x10, 0x20, 0x30, 0x40} at address 0x0000<br> <pre> [0xA6 0 0 0x10 0x20 0x30 0x40] </pre> Set the read pointer to address 0x0000<br> <pre> [0xA6 0 0] </pre> Read back your 4 bytes<br> <pre> [0xA7 r:4] </pre> <h3>Building the code</h3> Edit config.mk and change PROGRAM_CMD for your system. <br> To build and flash to Arduino Diecemilia (atmega168):<br> <pre> cd src && make BOARD=ARDUINO clean && make BOARD=ARDUINO && make BOARD=ARDUINO program </pre> <br> To build for Teensy 1.0 (at90usb162):<br> <pre> cd src && make BOARD=TEENSY clean && make BOARD=TEENSY && make BOARD=TEENSY program </pre> <h3>Supported Hardware</h3> <b>Known working:</b> <p> <a href="http://www.arduino.cc/en/Main/ArduinoBoardDiecimila">Arduino Diecemilia</a><br> <a href="http://www.pjrc.com/teensy/schematic.html">Teensy 1.0</a><br> <a href="http://blog.hodgepig.org/articles/000006-flatworm/index.html">Flatworm</a><br> </p> <b>Very likely to work:</b> (even more likely if you donate hardware...) <p> <a href="http://www.arduino.cc/en/Main/ArduinoBoardDuemilanove">Arduino Duemilanove</a><br> Arduino Mega<br> <a href="http://www.pjrc.com/store/teensy.html">Teensy 2.0</a><br> <a href="http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3879">AT90USBKEY</a><br> <a href="http://code.google.com/p/micropendous/">Micropendous</a><br> <a href="http://fletchtronics.net/bumble-b">Bumble-b</a><br> </p> <h3>FAQ</h3> <p> Q. Why is it called Bus Ninja? <br> A. Because Ninjas are better than Pirates and Yarrrrrduino sounds silly. </p> <p> Q. What hardware does Bus Ninja run on? <br> A. It was originally developed on Teensy1 (AT90USB162), then later ported to Arduino (ATMega168). Adding support for other AVRs should just be a matter of changing the definitions in config.mk. </p> <p> Q. Why do I lose characters when I paste to the Arduino? <br> A. The Arduino serial port isn't flow controlled, use the USB version of Bus Ninja </p> <p> Q. How do I port Bus Ninja to my custom AVR/Arduino board? <br> A. Edit config*.mk, setup FCPU, MCU, LED PORT/PIN and desired features. </p> <p> Q. Why aren't you using LUFA's scheduler/task framework? <br> A. Bus Ninja needs to remain portable to other stacks and processors, so it doesn't use LUFA's application framework. </p> <p> Q. How do I add a new command? <br> A. Use the macros DECLARE_COMMAND(mycmd), ADD_COMMAND(mycmd) and DEFINE_COMMAND(mycmd) in global_commands.c </p> <p> Q. How do I add a new bus? <br> A. Declare a bus_interface_t, provide handlers for the methods, enable it with bus_init(&my_bus). See bus_spi.[ch]. The buses are enabled by a command in global_commands.c </p> <p> Q. How do I disable a feature? <br> A. Edit config.mk, comment out unused features. </p> <p> Q. Why isn't the LED command hooked up to the on-board LED on Arduino? <br> A. The LED is on the SPI CLK line, so is needed for SPI. </p> <p> Q. Why clone the Bus Pirate? <br> A. To get to a single chip Bus Pirate work-a-like with a free software toolchain. </p> <h3>License and acknowledgements</h3> <p> Unless otherwise stated, everything is licensed under <a href="http://creativecommons.org/publicdomain/zero/1.0/">CC-0</a>. </p> <p> Bus Ninja also contains code from:<br> LUFA (Dean Camera)<br> userial (Thomas Pircher)<br> estick-jtag/opendous-jtag (Cahya Wirawan, Vladimir Fonov, Dean Camera, Denver Gingerich) </p> <p> Although Bus Ninja shares no code with the Bus Pirate project, it wouldn't exist without it. Thanks. </p> <hr> For suggestions, hardware donations and patches, contact:<br> Joby Taffey <jrt@hodgepig.org> </body> </html>
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