Blinkenlights, Demonstrate the use of the uSD slot for DIY hardware http://projects.qi-hardware.com/index.php/p/ben-blinkenlights/
 
 
 
 
 
 
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Werner Almesberger 9e223f77e6 ubbctl/: also support decoding and setting of interrupts and alternate functions 2014-03-06 11:34:28 -03:00
avrdude avrduded/patches/: remove ATmega32u2 config entry 2012-07-22 13:16:12 -03:00
bbl bbl.c (main): open /dev/mem with O_SYNC to disable caching 2011-01-03 18:31:38 -03:00
cam Initial commit. 2010-09-01 04:02:24 -03:00
ext ext/: added uSD extender board (draft) 2010-11-02 12:17:20 -03:00
ioscript ioscript/ioscript: allow positions to be redefined 2012-12-17 14:41:23 -03:00
libubb libubb/include/ubb/regbase.h (PDTRGx): add trigger mode registers 2014-03-06 11:24:09 -03:00
lpc111x-isp lpc111x-isp/lpc111x.c: new option -P function=signal to reassign pins 2013-01-02 10:33:28 -03:00
nxuart nxuart/nxuart.pro: updated for move of atmega48-mmu symbol 2011-08-14 02:48:53 -03:00
swuart-chat swuart-chat/chat.c: options -r and -t to select pins; bit rate argument 2013-01-16 12:07:27 -03:00
ubb ubb/solder-cable.fig: drawing to illustrate soldering a cable to UBB 2013-01-16 22:53:14 -03:00
ubb-jtag ubb-jtag/ubb-jtag-m1.sch: connect VREF to 2.5 V; explain that R3 is untested 2013-01-04 15:57:12 -03:00
ubb-la ubb-la/gui.c: Shift+Left/Right jumps "intelligently" to next change on any channel 2013-02-01 12:29:24 -03:00
ubb-patgen ubb-patgen/Makefile (LDLIBS): add -lpthread -ldl 2013-03-29 20:33:41 -03:00
ubb-usb ubb-usb/pin-change.fig: corrected some small errors in drawing or style 2011-10-05 03:43:33 -03:00
ubb-vga ubb-vga/regs4740.h: add some more register locations 2012-07-22 02:31:38 -03:00
ubbctl ubbctl/: also support decoding and setting of interrupts and alternate functions 2014-03-06 11:34:28 -03:00
BOOKSHELF Added simple UART 8:10 card. 2011-01-31 19:02:50 -03:00
Makefile Added simple UART 8:10 card. 2011-01-31 19:02:50 -03:00
README README: add ubbctl and ubb-jtag 2013-01-06 08:56:48 -03:00
bbl.brd bbl.brd: updated 8:10-CARD to update pad type 2011-01-18 16:08:00 -03:00
bbl.cmp use 8_10-card.fpd instead of usd-card.fpd 2011-01-17 12:42:49 -03:00
bbl.pro use 8_10-card.fpd instead of usd-card.fpd 2011-01-17 12:42:49 -03:00
bbl.sch use 8_10-card.fpd instead of usd-card.fpd 2011-01-17 12:42:49 -03:00

README

Ben Blinkenlights
=================

This is an umbrella project for various items related to using the 8:10
card slot of the Ben Nanonote. The "flagship" sub-project is no longer
the top-level LED board but the Universal Breakout Board, in ubb/

  .		The original blinkenlights, a board with a line of LEDs
  cam/		Outline of the board; obsolete
  ext/		UBB variant with ground between signals; obsolete
  ioscript/	GPIO test pattern generator; experimental
  libubb/	Helper functions for accessing UBB
  lpc111x-isp/	In-system programmer for NXP LPC111x MCUs
  nxuart/	Card with ATmega48 in UART configuration; incomplete
  swuart-chat/	Software-implemented UART (on UBB)
  ubb-jtag/	JTAG via UBB (example for Milkymist One)
  ubb-usb/	Design for hypothetical UBB-based USB host
  ubb-vga/	VGA output using UBB and minimal circuitry
  ubbctl/	Set and query UBB signals from the command line
  ubb/		The Universal Breakout Board (UBB)


Blinkenlights
-------------

This project is a proof of concept implementation of Rikard Lindstrom's
idea of using the Ben's 8:10 card slot as a general extension interface
also for devices that don't speak MMC or SD/SDIO. The application is a
simple LED circuit, as suggested by David Samblas.

The 8:10 card slot gives access to six GPIOs, a 3.3 V supply that can
be switched on and off by software, and ground. We use a simple form of
multiplexing to drive ten LEDs with this interface.

Note that one should only light one LED at a time. If multiple LEDs are
lit, they will share the current though the common resistor, and will
thus be less bright than a single LED.