added descriptions to most of the 'references' entries
Ben Blazak
parent
1c6d31f012
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69367d25ec
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references.md
167
references.md
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@ -13,14 +13,18 @@
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: image
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* [Vcc, Vdd, Vss, etc.]
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(http://encyclobeamia.solarbotics.net/articles/vxx.html)
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(http://encyclobeamia.solarbotics.net/articles/vxx.html)
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A neat little discussion of the symbols and where they came from.
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* [Very Basic Circuits]
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(http://www.seattlerobotics.org/encoder/mar97/basics.html)
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: column by Kevin Ross for Encoder
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: column by Kevin Ross for Encoder
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Includes a short thing about pull-up resistors.
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* [Powering Light Emitting Diodes(LEDs)]
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(http://wolfstone.halloweenhost.com/Lighting/litlpo_PoweringLEDs.html)
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(http://wolfstone.halloweenhost.com/Lighting/litlpo_PoweringLEDs.html)
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Can you use one resistor for multiple parallel LEDs? No. Or, you can, but
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it's not the best idea.
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* can also be reached via <http://thewolfstone.com/>
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-> [ENTER] ('http://thewolfstone.com/Welcome/Home.html)
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@ -32,20 +36,26 @@
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(http://wolfstone.halloweenhost.com/Lighting/litlpo_PoweringLEDs.html)
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* [All About Circuits : Reference]
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(http://www.allaboutcircuits.com/vol_5/index.html)
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(http://www.allaboutcircuits.com/vol_5/index.html)
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Looks like a great collection of info; didn't get to read much of it.
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* [Effects of Varying I2C Pull-Up Resistors]
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(http://dsscircuits.com/articles/effects-of-varying-i2c-pull-up-resistors.html) : article by Wayne Truchsess
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(http://dsscircuits.com/articles/effects-of-varying-i2c-pull-up-resistors.html) : article by Wayne Truchsess
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Great discussion on the topic, with oscilloscope graphs. The practical
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takeaway is that 4.7kΩ is a good value for 100kHz I²C, and 2.2kΩ is good
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for 400kHz.
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## C Stuff
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* [comp.lang.c Frequently Asked Questions]
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(http://c-faq.com/index.html)
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(http://c-faq.com/index.html)
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Really good information, if they happen to address the question you have.
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* [The C Preprocessor]
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(http://gcc.gnu.org/onlinedocs/gcc-2.95.3/cpp_1.html#SEC1)
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(on <http://gcc.gnu.org/>)
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(on <http://gcc.gnu.org/>)
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One of my main references.
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* [C Library Reference]
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(http://www.cplusplus.com/reference/)
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@ -94,26 +104,37 @@
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* [AVR Newbie guide]
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(http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=70673)
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by stu_san (on <http://www.avrfreaks.net/>)
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by stu_san (on <http://www.avrfreaks.net/>)
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Didn't read much of it, but it looks like a great collection of info.
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* [AVR Libc Library Reference]
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(http://www.nongnu.org/avr-libc/user-manual/modules.html)
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(http://www.nongnu.org/avr-libc/user-manual/modules.html)
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One of my main references.
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* [avr-libc/include/avr/iom32u4.h]
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(http://svn.savannah.nongnu.org/viewvc/trunk/avr-libc/include/avr/iom32u4.h?revision=2288&root=avr-libc&view=markup)
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: list of registers and associated bit numbers for ATmega32U4
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List of registers and associated bit numbers for the ATmega32U4
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* [A Brief Tutorial on Programming the AVR without Arduino]
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(https://www.mainframe.cx/~ckuethe/avr-c-tutorial/)
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by Chris Kuethe
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by Chris Kuethe
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Goes over a bunch of stuff pretty generally. Useful to me because it was
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talking about exactly what I was trying to do (e.g. program the thing
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directly instead of messing around with gratuitous libraries)
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* [Optimisations of AVR programs using avr-gcc]
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(http://www.tty1.net/blog/2008-04-29-avr-gcc-optimisations_en.html)
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(http://www.tty1.net/blog/2008-04-29-avr-gcc-optimisations_en.html)
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About compiling and stuff.
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* [Using the EEPROM memory in AVR-GCC]
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(http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=38417)
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: tutorial by [Dean Camera] (http://fourwalledcubicle.com/AboutMe.php)
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(on <http://www.avrfreaks.net/>)
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(on <http://www.avrfreaks.net/>)
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The EEPROM is non-volatile data memory that you can write to if you like. I
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don't really see the purpose, unless it feels conceptually cleaner to you,
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because there's only 1024 bytes of it on the Teensy 2.0, while there's 2560
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bytes of RAM, and 33256 bytes of flahs (program memory), and it seems like
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it'd be easier to use one of those if you could.
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* updated version available as a pdf at
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[Four Walled Cubicle : AVR Articles]
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@ -128,22 +149,33 @@
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* [Arduino I²C Expansion IO]
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(http://www.neufeld.newton.ks.us/electronics/?p=241)
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(from [Keith's Electronics Blog]
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(http://www.neufeld.newton.ks.us/electronics/))
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(http://www.neufeld.newton.ks.us/electronics/))
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Didn't use this much, but it's nice (if you're using the Arduino 'Wire'
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library), and it has pictures.
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* [Arduino Playground :: Wire Library, Explored]
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(http://arduino.cc/playground/Main/WireLibraryDetailedReference)
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(http://arduino.cc/playground/Main/WireLibraryDetailedReference)
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More about the Wire library. If you're not using interrupts, I think you'll
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be better off looking throught the datasheet and writing your own trivial
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library in C. It really is trivial, almost all the code is in the datasheet
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(at least for the ATmega32U4), and it'll make more sense to you that way :) .
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### USB
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* About Keyboard [Scan Codes]
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(http://geekhack.org/showwiki.php?title=Scan+Codes)
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(on <http://geekhack.org/>)
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(on <http://geekhack.org/>)
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Interesting discussion. For practical purposes, if you're just dealing with
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USB, you can skip this and go straight to the keyboard usage page in the HID
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Usage Tables (see below).
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* [USB - boot mode, NKRO, compatibility, etc...]
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(http://geekhack.org/showthread.php?13162-USB-boot-mode-NKRO-compatibility-etc/page2)
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: old thread by [Soarer]
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(http://geekhack.org/member.php?4274-Soarer)
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(on <http://geekhack.org/>)
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(on <http://geekhack.org/>)
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Discussion about getting NKRO to work over USB and still be compatible with
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various BIOSs.
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* [USB 2.0 Specification]
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(http://www.usb.org/developers/docs/usb_20_101111.zip)
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@ -164,14 +196,18 @@
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### Keyboard Firmware
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* zip: [Phantom Firmware from PrinsValium]
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(http://geekhack.org/attachment.php?attachmentid=38982&d=1327895092)
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(http://geekhack.org/attachment.php?attachmentid=38982&d=1327895092)
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Pretty basic. Helped me a lot when I was learning how to initialize stuff on
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the Teensy.
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* mentioned in the [Building Phantom Hardware and Firmware Mods]
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(http://geekhack.org/showwiki.php?title=Island:26742)
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article (on <http://geekhack.org/>)
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* github: [tmk / tmk_keyboard]
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(https://github.com/tmk/tmk_keyboard)
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(https://github.com/tmk/tmk_keyboard)
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Firmware by [hasu] (http://geekhack.org/member.php?3412-hasu) on geekhack.
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Supports NKRO and mouse movements.
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* forked by [Pyrolistical / tmk_keyboard]
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(https://github.com/Pyrolistical/tmk_keyboard/tree/master/fourway)
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@ -188,7 +224,9 @@
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thread on <http://geekhack.org/>
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* github: [humblehacker / keyboard]
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(https://github.com/humblehacker/keyboard)
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(https://github.com/humblehacker/keyboard)
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Looks like it has some cool ideas, but I haven't read through it well enough
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to know what's going on.
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* mentioned on [the humblehacker keyboard website]
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(http://humblehacker.com/keyboard/)
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@ -202,40 +240,77 @@
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### USB Libraries
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* [LUFA (2012) (Lightweight USB Framework for AVRs)]
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(http://www.fourwalledcubicle.com/LUFA.php)
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(http://www.fourwalledcubicle.com/LUFA.php)
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Very well known USB library for AVRs. And it looks like it be really good
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too, but the documentation is hard to get into, and the examples don't seem
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to have enough explanation for me, not having a background in what USB is
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doing in the first place.
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* zip: [PJRC: usb_keyboard]
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(http://pjrc.com/teensy/usb_keyboard.zip)
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(http://pjrc.com/teensy/usb_keyboard.zip)
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From the [LUFA Library : Alternative USB AVR Stacks]
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(http://www.fourwalledcubicle.com/files/LUFA/Doc/110528/html/_page__alternative_stacks.html)
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page: "Not so much a complete stack as a collection of USB enabled demos,
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this library is specifically designed for the PJRC Teensy line of USB AVRs,
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and thus may need to be modified for other USB AVR chips. These minimal code
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samples shows the inner workings of the USB controller, without all the
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abstraction present in most other USB AVR stacks."
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* mentioned on [the PJRC website]
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(http://pjrc.com/teensy/usb_keyboard.html)
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* [V-USB]
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(http://vusb.wikidot.com/driver-api)
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From the [LUFA Library : Alternative USB AVR Stacks]
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(http://www.fourwalledcubicle.com/files/LUFA/Doc/110528/html/_page__alternative_stacks.html)
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page: "Well regarded and complete USB 1.1 software stack for several AVR
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models, implementing Low Speed HID. Used in many commercial and
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non-commercial designs, with user-submitted projects available for viewing on
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the company's website. Uses C language code mixed with assembly for
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time-critical sections."
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Also, it has really good documentation.
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### TWI Libraries
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* github: [TWI library in C]
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(https://github.com/arduino/Arduino/tree/master/libraries/Wire/utility)
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: (arduino / Arduino / libraries / Wire / utility)
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: (arduino / Arduino / libraries / Wire / utility)
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Well done (as far as I can tell) and complete (includes code for interrupt
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handling). Meant to be used through the Arduino 'Wire' library interface,
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but you can use it alone as well. The version on github pulls in a whole
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bunch of Arduino dependencies though, if you're just going to use the
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library look for an older version that doesn't (like the version in the
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Ubuntu 11.10 repos).
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* zip: [i2cmaster]
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(http://homepage.hispeed.ch/peterfleury/i2cmaster.zip)
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(by Peter Fleury, on [his homepage]
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(http://homepage.hispeed.ch/peterfleury/))
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(http://homepage.hispeed.ch/peterfleury/))
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Good I2C library. Includes stuff both in assembly and C (though, I didn't
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look at the assembly code). I still think you're better off writing your
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own, it's not that hard and you'll understand it better. Also, this library
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is under the GPL (from what it says on his site; couldn't find a licence in
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the code).
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* forum: [Interfacing MCP23018 io expander via Arduino]
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(http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1282150189)
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: contains a quick MCP23017 library in C++
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(http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1282150189)
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Contains a quick MCP23017 library in C++. Didn't end up looking at it too
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hard.
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* github: [maniacbug / Arduino / libraries / MCP23018]
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(https://github.com/maniacbug/Arduino/tree/master/libraries/MCP23018)
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: library in C++
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(https://github.com/maniacbug/Arduino/tree/master/libraries/MCP23018)
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Library in C++. Don't think I ended up looking through this one at all.
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### Other
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* [Soarer's Converter (XT/AT/PS2/Terminal to USB Converter with NKRO)]
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(http://geekhack.org/showwiki.php?title=Island:17458)
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(http://geekhack.org/showwiki.php?title=Island:17458)
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No code for the part that talks over USB though. Code only available for the
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tools that allow you to change the keymap and stuff, I think.
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* zip: [PJRC: blinky]
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(http://pjrc.com/teensy/blinky.zip)
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(http://pjrc.com/teensy/blinky.zip)
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Little baby example project for the Teensy. Quite nice.
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* mentioned on [the PJRC website]
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(http://pjrc.com/teensy/gcc.html)
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@ -295,12 +370,22 @@
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* [Keyboard Scan Rates]
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(http://geekhack.org/showwiki.php?title=Keyboard+scan+rates)
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list (on <http://geekhack.org/>)
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list (on <http://geekhack.org/>)
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Keyboards seem to typically scan at rates from a little below 100Hz to about
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300Hz, with the most common values a little below 100Hz. The [PJRC
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usb_keyboard] example documentation has a limit of 1000 packets (so 500
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presses -> releases) per second, but says that even that speed might
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overwhelm host software, which expects keystrokes to come much more slowly.
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And, a debounce time of 5ms (which is the spec'ed high value for Cherry MX
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switches) would give us a max send rate of 200Hz, above which it'd be a
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little pointless to scan.
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### Other Awesome Keyboard Projects
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* [My DIY keyboard collection ( or how I became a KB-geek...)]
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(http://deskthority.net/workshop-f7/my-diy-keyboard-collection-or-how-i-became-a-kb-geek-t2534.html)
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(http://deskthority.net/workshop-f7/my-diy-keyboard-collection-or-how-i-became-a-kb-geek-t2534.html)
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If I ever decide to do a keyboard completely by myself, I'm going back to
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this link and starting with this. Looks really well done.
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* linked to in [a post]
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(http://geekhack.org/showthread.php?22780-Interest-Check-Custom-split-ergo-keyboard&p=582593&viewfull=1#post582593)
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@ -309,11 +394,14 @@
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### Documentation and Design Tools
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* [Markdown: Syntax]
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(http://daringfireball.net/projects/markdown/syntax)
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(http://daringfireball.net/projects/markdown/syntax)
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A necessity if your code is on github :) .
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* [KiCAD Tutorial]
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(http://teholabs.com/knowledge/kicad.html)
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(on <http://teholabs.com/>)
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(on <http://teholabs.com/>)
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I like the tool. Didn't need the functionality just for a little circuit
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diagram though, so I forwent the learning curve and used Inkscape.
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* mentioned on the [circuit/block-diagram drawing]
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(http://stackoverflow.com/questions/6422603/circuit-block-diagram-drawing)
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@ -321,7 +409,11 @@
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* [Ti<i>k</i>Z and PGF]
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(http://www.texample.net/tikz/)
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: a TeX graphics package
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: a TeX graphics package
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This is really cool. And I wish i knew more about LaTeX (and all its
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variations) so that it would have been time effective for me to use it. If I
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ever need to do automatic diagram generation, I'm going to give it a more
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serious try.
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* mentioned on the [circuit/block-diagram drawing]
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(http://stackoverflow.com/questions/6422603/circuit-block-diagram-drawing)
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@ -335,7 +427,10 @@
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(http://www.texample.net/tikz/examples/line-junctions/)
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* [Inkscape : Connector tool tutorial]
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(http://wiki.inkscape.org/wiki/index.php/UsingTheConnectorTool)
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(http://wiki.inkscape.org/wiki/index.php/UsingTheConnectorTool)
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The open source vector graphics tool. Not the _best_ for diagrams (though,
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see the link; as that tool improves it will hopefully become much better),
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but it works and I like it :) .
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-------------------------------------------------------------------------------
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Loading…
Reference in New Issue