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ergodox-firmware/doc/references.md
Ben Blazak 57e82aebcf lots and lots; now writing/debugging keyboard logic 
also, mcp23018_init() needs fixing: `twi_stop()` needs to be at the end
of transmission blocks.  i wouldn't think that would be necessary, but
it seems to be the only thing that'll make it work, and it also seems
consistent with the protocol diagram in the datasheet (lol, imagine
that), so i think that's what i'll have to do.  not as though it matters
much i guess, since it's a single master / single slave system anyway, i
was just hoping not to release the bus till i was finished..
2012-04-10 01:44:27 -07:00

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## Electronics Stuff
* [Resistor Color Codes]
(http://www.ladyada.net/wiki/lib/exe/fetch.php?hash=a2c6a9&w=501&h=785&media=http%3A%2F%2Fwww.ladyada.net%2Fimages%2Fmetertutorial%2Frescolorcode.jpg)
: image
* from [the Multimeter Tutorial]
(http://www.ladyada.net/learn/multimeter/resistance.html)
(on <http://ladyada.net/>)
* [Schematic Symbols]
(http://img.docstoccdn.com/thumb/orig/28066054.png)
: image
* [Vcc, Vdd, Vss, etc.]
(http://encyclobeamia.solarbotics.net/articles/vxx.html)
* [Very Basic Circuits]
(http://www.seattlerobotics.org/encoder/mar97/basics.html)
: column by Kevin Ross for Encoder
* [Powering Light Emitting Diodes(LEDs)]
(http://wolfstone.halloweenhost.com/Lighting/litlpo_PoweringLEDs.html)
* can also be reached via <http://thewolfstone.com/>
-> [ENTER] ('http://thewolfstone.com/Welcome/Home.html)
-> [Wolfstone's Haunted Halloween Page]
(http://thewolfstone.com/_ar/Halloween.html)
-> [technology]
(http://wolfstone.halloweenhost.com/Navigation/TechBase.html)
-> [powering LEDs]
(http://wolfstone.halloweenhost.com/Lighting/litlpo_PoweringLEDs.html)
* [All About Circuits : Reference]
(http://www.allaboutcircuits.com/vol_5/index.html)
* [Effects of Varying I2C Pull-Up Resistors]
(http://dsscircuits.com/articles/effects-of-varying-i2c-pull-up-resistors.html) : article by Wayne Truchsess
## C Stuff
* [comp.lang.c Frequently Asked Questions]
(http://c-faq.com/index.html)
* [The C Preprocessor]
(http://gcc.gnu.org/onlinedocs/gcc-2.95.3/cpp_1.html#SEC1)
(on <http://gcc.gnu.org/>)
* [C Library Reference]
(http://www.cplusplus.com/reference/)
(on <http://cplusplus.com>)
* [C Operators/Expressions]
(http://www.lix.polytechnique.fr/~liberti/public/computing/prog/c/C/CONCEPT/expressions.html)
(on <http://www.lix.polytechnique.fr/>)
* [Bitwise Operators in C and C++: A Tutorial]
(http://www.cprogramming.com/tutorial/bitwise_operators.html)
(on <http://cprogramming.com/>)
* [AVR Tutorials - \[TUT\] \[C\] Bit manipulation (AKA "Programming 101")]
(http://www.avrfreaks.net/index.php?name=PNphpBB2&file=printview&t=37871&start=0)
* [In C++ is "const" after type ID acceptable?]
(http://stackoverflow.com/questions/988069/in-c-is-const-after-type-id-acceptable)
(on <http://stackoverflow.com/>)
* [Arrays and pointers in C]
(http://www.ibiblio.org/pub/languages/fortran/append-c.html)
(on <http://www.ibiblio.org/>)
* [how to use array of function pointers?]
(http://stackoverflow.com/questions/252748/how-to-use-array-of-function-pointers)
(on <http://stackoverflow.com/>)
* [The Function Pointer Tutorials]
(http://www.newty.de/fpt/index.html)
* [C preprocessor and concatenation]
(http://stackoverflow.com/questions/1489932/c-preprocessor-and-concatenation)
(on <http://stackoverflow.com/>)
* [The New C: Inline Functions]
(http://drdobbs.com/184401540)
by Randy Meyers
(on <http://drdobbs.com/>)
### For the AVR
* [AVR Newbie guide]
(http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=70673)
by stu_san (on <http://www.avrfreaks.net/>)
* [AVR Libc Library Reference]
(http://www.nongnu.org/avr-libc/user-manual/modules.html)
* [avr-libc/include/avr/iom32u4.h]
(http://svn.savannah.nongnu.org/viewvc/trunk/avr-libc/include/avr/iom32u4.h?revision=2288&root=avr-libc&view=markup)
: list of registers and associated bit numbers for ATmega32U4
* [A Brief Tutorial on Programming the AVR without Arduino]
(https://www.mainframe.cx/~ckuethe/avr-c-tutorial/)
by Chris Kuethe
## Protocol Stuff
### I&sup2;C
* [Arduino I&sup2;C Expansion IO]
(http://www.neufeld.newton.ks.us/electronics/?p=241)
(from [Keith's Electronics Blog]
(http://www.neufeld.newton.ks.us/electronics/))
* [Arduino Playground :: Wire Library, Explored]
(http://arduino.cc/playground/Main/WireLibraryDetailedReference)
### USB
* About Keyboard [Scan Codes]
(http://geekhack.org/showwiki.php?title=Scan+Codes)
(on <http://geekhack.org/>)
* [USB 2.0 Specification]
(http://www.usb.org/developers/docs/usb_20_101111.zip)
: zip (from <http://www.usb.org/developers/docs/>)
* [HID Device Class Definition]
(http://www.usb.org/developers/devclass_docs/HID1_11.pdf)
: pdf (from <http://www.usb.org/developers/hidpage>)
* HID = Human Interface Device
* [HID Usage Tables]
(http://www.usb.org/developers/devclass_docs/Hut1_12v2.pdf)
: pdf (from <http://www.usb.org/developers/hidpage>)
## Miscellaneous
* [Markdown: Syntax]
(http://daringfireball.net/projects/markdown/syntax)
* [Keyboard Scan Rates]
(http://geekhack.org/showwiki.php?title=Keyboard+scan+rates)
list (on <http://geekhack.org/>)
## Other Firmware / Code
* zip: [Phantom Firmware from PrinsValium]
(http://geekhack.org/attachment.php?attachmentid=38982&d=1327895092)
* mentioned in the [Building Phantom Hardware and Firmware Mods]
(http://geekhack.org/showwiki.php?title=Island:26742)
article (on <http://geekhack.org/>)
* github: [tmk / tmk_keyboard]
(https://github.com/tmk/tmk_keyboard)
* forked by [Pyrolistical / tmk_keyboard]
(https://github.com/Pyrolistical/tmk_keyboard/tree/master/fourway)
* mentioned in the [KeyPoard]
(http://geekhack.org/showwiki.php?title=Island:26845)
article on <http://geekhack.org/>
* forked by [riffautae / tmk_keyboard]
(https://github.com/riffautae/tmk_keyboard)
* mentioned on the [Teensy Keyboard Firmware Discussion]
(http://geekhack.org/showthread.php?26730-Teensy-Keyboard-Firmware-Discussion/page2)
thread on <http://geekhack.org/>
* github: [humblehacker / keyboard]
(https://github.com/humblehacker/keyboard)
* mentioned on [the humblehacker keyboard website]
(http://humblehacker.com/keyboard/)
* mentioned on [the humblehacker geekhack page]
(http://geekhack.org/showwiki.php?title=Island:6292)
* mentioned on [the designer's blog]
(http://humblehacker.com/blog/)
* github: [TWI library in C]
(https://github.com/arduino/Arduino/tree/master/libraries/Wire/utility)
: (arduino / Arduino / libraries / Wire / utility)
* forum: [Interfacing MCP23018 io expander via Arduino]
(http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1282150189)
: contains a quick MCP23017 library in C++
* github: [maniacbug / Arduino / libraries / MCP23018]
(https://github.com/maniacbug/Arduino/tree/master/libraries/MCP23018)
: library in C++
* zip: [PJRC: usb_keyboard]
(http://pjrc.com/teensy/usb_keyboard.zip)
* mentioned on [the PJRC website]
(http://pjrc.com/teensy/usb_keyboard.html)
* zip: [PJRC: blinky]
(http://pjrc.com/teensy/blinky.zip)
* mentioned on [the PJRC website]
(http://pjrc.com/teensy/gcc.html)
## Chip Documentation
* [Microchip: Analog & Interface Product Selector Guide]
(http://ww1.microchip.com/downloads/en/DeviceDoc/21060z.pdf)
* from [the Microchip website (MCP23017 product listing page)]
(http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en023499)
* [MCP23017 / MCP23S17 Data Sheet]
(http://ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf)
* from [the Microchip website]
(http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en023499)
* [MCP23018 / MCP23S18 Data Sheet]
(http://ww1.microchip.com/downloads/en/DeviceDoc/22103a.pdf)
* from [the Microchip website]
(http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en537375)
* [Teensy 2.0 (ATMEGA32U4) Data Sheet]
(http://pjrc.com/teensy/atmega32u4.pdf)
* from [the PJRC website]
(http://pjrc.com/teensy/datasheets.html)
* [Teensy++ 2.0 (AT90USB1286) Data Sheet]
(http://pjrc.com/teensy/at90usb1286.pdf)
* from [the PJRC website]
(http://pjrc.com/teensy/datasheets.html)
* [Teensy 2.0 Pin Assignments, Using C]
(http://pjrc.com/teensy/card2a.pdf)
* from [the PJRC website]
(http://pjrc.com/teensy/datasheets.html)
* [Teensy 2.0 Pin Assignments, Using Arduino]
(http://pjrc.com/teensy/card2b.pdf)
* from [the PJRC website]
(http://pjrc.com/teensy/datasheets.html)
-------------------------------------------------------------------------------
Copyright &copy; 2012 Ben Blazak <benblazak.dev@gmail.com>
Released under The MIT License (MIT) (see "license.md")
Project located at <https://github.com/benblazak/ergodox-firmware>
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