# HG changeset patch # User Paul Boddie # Date 1385328671 0 # Node ID eff54771098af7af6ce38d658861b681c476120c # Parent ff34ebd6a31b712a6b3b016bb47dac571a359bdd Added documentation and copyright and licensing information. Changed Nokia 6110 references to Nokia 6100, ignoring what the shieldlist.org entry says about the shield. diff -r ff34ebd6a31b -r eff54771098a README.txt --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.txt Sun Nov 24 21:31:11 2013 +0000 @@ -0,0 +1,192 @@ +Introduction +------------ + +The ben-pcf8833 distribution provides some programs that run on the Ben +NanoNote to control a "Nokia 6100" LCD using the Nuelectronics "Color LCD & +Joystick Shield". To connect the shield to the Ben, the 8:10 port which is +typically employed to access microSD cards is instead used to hold a suitable +breakout board that exposes the 8:10 port's connectors to other circuits. +These connectors are in turn connected to specific connectors on the shield +via some level shifter components as follows: + +Sniffer UBB Shifters Shield +------- ---- ---------- ------ +DAT2 DAT2 A1 (#2) B1 8 (BACKLIGHT) +CD DAT3 A2 (#1) B2 10 (SS/CS) +CMD CMD A1 (#1) B1 9 (RESET) +VCC VDD LV HV VIN +CLK CLK A4 (#1) B4 13 (SCLK/CLK) +GND GND GND GND GND +DAT0 DAT0 A3 (#1) B3 11 (MOSI/SEND) +DAT1 DAT1 + +Here, two level shifters are used and are labelled #1 and #2 above. The +VCC/VDD and GND connections from the Ben are connected to the LV and GND +connections respectively on the level shifters. + +In addition to the Sniffer or UBB connections, additional connections for 5V +power and ground must be connected as follows: + +5V Supply Shifters +----------- ---------- +5V HV +GND GND + +The 5V output of an Arduino Duemilanove board was successfully used, as it +normally would be with the shield, but any regulated 5V supply should be +suitable. + +Collecting Images for Display +----------------------------- + +Before building the bitmap program, some images with the following specific +properties are required: + +Width: 132 pixels +Height: 132 pixels + +To save you the effort of finding suitable images, some example files are +included in this software distribution. + +An image preparation program then needs to be run on a list of image filenames +to produce suitable source files that can be incorporated into the built +program. This program should be run automatically when building, meaning that +you can skip forward to the "Building the Software" section, but to use other +images or to customise the software you will need to consult the following +instructions. + +The image preparation program can be found in the tools directory and is +called bitmap.py. This program is written in Python and needs the Python +Imaging Library, available in Debian as the python-imaging package and in +other GNU/Linux distributions under other names. It is also available from the +following location: + +https://pypi.python.org/pypi/PIL + +Images are prepared for the program as follows (and this is normally done by +the Makefile automatically): + +python tools/bitmap.py bitmaps examples/*.JPG + +Here, two JPEG files will be loaded, internally converted (the files are not +changed), and the bitmap data written out to two files: + +bitmaps.c +bitmaps.h + +Since the Makefile and bitmap program reference these files, it is recommended +that the "bitmaps" basename be retained when running the bitmap.py program. + +The bitmap.py program also supports other common image formats such as PNG. + +Building the Software +--------------------- + +Before building the software, it will probably be necessary to edit the +Makefile to specify the locations of the cross-compilation toolchain and of +libubb. Obtaining a toolchain and libubb is currently beyond the scope of this +document. + +The programs are built as follows: + +make + +Running the Software +-------------------- + +On the Ben, the programs can be deployed together with libubb in a particular +directory and invoked as follows: + +LD_LIBRARY_PATH=. ./spin +LD_LIBRARY_PATH=. ./bitmap + +Alternatively, the library search path can be configured properly and the +programs installed in such a way that merely typing the name of the programs +is enough to run them. + +Hardware: Color LCD & Joystick Shield +------------------------------------- + +This board provides a "Nokia 6100" display and a joystick (currently unused): + +http://shieldlist.org/nuelectronics/colorlcd-joystick + +Nuelectronics do not seem to exist any more, but a similar product is +documented on the Sparkfun site: + +https://www.sparkfun.com/products/9363 + +A more appropriate board for the Ben might be the following: + +https://www.sparkfun.com/products/11062 + +Since it runs at 3.3V, it would probably be possible to use this particular +board directly with the Ben, leaving out the level shifters/converters +entirely. + +Note that with all boards providing LCD panels, careful inspection and/or +research is necessary to determine which display controller is actually being +used. Annoyingly, product descriptions tend to omit such information. + +Hardware: 4-channel I2C-safe Bi-directional Logic Level Converter - BSS138 +-------------------------------------------------------------------------- + +Since the Arduino shield described above operates at 5V whereas the Ben +operates at 3.3V, some level shifters are required. The following product was +used for such purposes: + +https://www.adafruit.com/products/757 + +Since five signal lines are required for the communication, two such level +shifters are needed (two multiplied by four lines). There are other products +providing more lines, but when choosing a replacement it is important to check +that SPI usage and that 3.3V inputs and 5V outputs can be supported. The above +product supports SPI and I2C communication as well as bidirectional +conversion. + +Hardware: 8:10 Port Breakout Board +---------------------------------- + +To connect the Ben NanoNote to the E-Paper Display module, a suitable breakout +board is required to expose the connections inside the 8:10 slot. To achieve +this, the Sparkfun microSD Sniffer has been used: + +https://www.sparkfun.com/products/9419 + +This board is apparently intended for eavesdropping on communications between +a "host" device with a microSD slot and a microSD-based device that can be +inserted into a slot mounted on the board (instead of being inserted directly +into the host device). However, the board-mounted slot can be ignored and the +exposed connections routed to the display board instead. + +Another board that achieves the same purpose is the Universal Breakout Board +(UBB): + +http://en.qi-hardware.com/wiki/UBB + +The UBB is somewhat more difficult to work with as its connectors are very +small and, compared to the microSD Sniffer, awkward to attach things to. The +microSD Sniffer employs connectors situated around holes with 0.1 inch +spacing, meaning that commonly available connection headers can be soldered +onto the board. + +Although the labelling of the connections is different between the microSD +Sniffer and UBB (see above), the layout appears to be identical. + +Contact, Copyright and Licence Information +------------------------------------------ + +The author can be contacted at the following e-mail address: + +paul@boddie.org.uk + +Copyright and licence information can be found in the docs directory - see +docs/COPYING.txt and docs/LICENCE.txt for more information. + +Much of the effort in understanding and documenting the PCF8833 controller was +done by James P. Lynch and is described in the following document: + +http://www.sparkfun.com/tutorial/Nokia%206100%20LCD%20Display%20Driver.pdf + +It appears that most subsequent efforts have drawn from this work, and thanks +are therefore due to the author for his generosity in sharing his findings. diff -r ff34ebd6a31b -r eff54771098a docs/Ben_PCF8833 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/Ben_PCF8833 Sun Nov 24 21:31:11 2013 +0000 @@ -0,0 +1,20 @@ +Ben PCF8833 is an experiment with the Ben NanoNote and a "Nokia 6100" display provided by the [http://shieldlist.org/nuelectronics/colorlcd-joystick Color LCD & Joystick Shield] from Nuelectronics. Since the shield requires 5V logic but the Ben works with 3.3V, some [https://www.adafruit.com/products/757 level shifters] are required for this to work. + +The PCF8833 display controller, particularly when used with a "Nokia" display, was documented by James P. Lynch in his [http://www.sparkfun.com/tutorial/Nokia%206100%20LCD%20Display%20Driver.pdf Nokia 6100 LCD Display Driver] tutorial. It appears that most subsequent efforts have drawn from this work, and thanks are therefore due to the author for his generosity in sharing his findings. + +== Goals == + +* Experiment with SPI communication using the 8:10 port (see [[UBB]]) +* Re-use an Arduino shield that wasn't seeing any action +* Prototype code that may one day be ported back to the Arduino +* Evaluate [https://www.adafruit.com/products/757 level shifters] for interfacing needs + +== Progress == + +A [http://hgweb.boddie.org.uk/ben-pcf8833/ repository] is available containing code to allow the Ben to communicate with the display, and some results are shown below. + + +File:PCF8833-with-breadboard.jpg|The display connected to a breadboard, with power supplied by an Arduino board's 5V output, and the Ben connected via two 3.3V to 5V level shifters to the display inputs + + +[[Category:Ben NanoNote]] diff -r ff34ebd6a31b -r eff54771098a docs/COPYING.txt --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/COPYING.txt Sun Nov 24 21:31:11 2013 +0000 @@ -0,0 +1,32 @@ +Licence Agreement for ben-pcf8833 +--------------------------------- + +Copyright (C) 2013 Paul Boddie + +SPI functions derived from those in lib/atben.c by Werner Almesberger: + +Copyright (C) 2010-2011 Werner Almesberger + +This software is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 2 of +the License, or (at your option) any later version. + +This software is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public +License along with this library; see the file LICENCE.txt +If not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + +Example Images +-------------- + +Images in the examples directory are provided under a Creative Commons +Attribution-ShareAlike 3.0 Unported licence (CC BY-SA 3.0). Details of this +licence are available from the following location: + +http://creativecommons.org/licenses/by-sa/3.0/ diff -r ff34ebd6a31b -r eff54771098a docs/LICENCE.txt --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/LICENCE.txt Sun Nov 24 21:31:11 2013 +0000 @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. 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Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff -r ff34ebd6a31b -r eff54771098a pcf8833.c --- a/pcf8833.c Sun Nov 24 19:28:06 2013 +0000 +++ b/pcf8833.c Sun Nov 24 21:31:11 2013 +0000 @@ -1,12 +1,16 @@ /* - * Ben NanoNote communication with the Nu Electronics "Color LCD & - * Joystick Shield" featuring a Nokia 6110 and the PCF8833 display + * Ben NanoNote communication with the Nuelectronics "Color LCD & + * Joystick Shield" featuring a Nokia 6100 and the PCF8833 display * controller. * * http://shieldlist.org/nuelectronics/colorlcd-joystick * * Copyright (C) 2013 Paul Boddie * + * SPI functions derived from those in lib/atben.c by Werner Almesberger: + * + * Copyright (C) 2010-2011 Werner Almesberger + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or diff -r ff34ebd6a31b -r eff54771098a pcf8833.h --- a/pcf8833.h Sun Nov 24 19:28:06 2013 +0000 +++ b/pcf8833.h Sun Nov 24 21:31:11 2013 +0000 @@ -1,6 +1,6 @@ /* - * Ben NanoNote communication with the Nu Electronics "Color LCD & - * Joystick Shield" featuring a Nokia 6110 and the PCF8833 display + * Ben NanoNote communication with the Nuelectronics "Color LCD & + * Joystick Shield" featuring a Nokia 6100 and the PCF8833 display * controller. * * http://shieldlist.org/nuelectronics/colorlcd-joystick @@ -30,6 +30,11 @@ * GND GND GND GND GND * DAT0 DAT0 A3 (#1) B3 11 (MOSI/SEND) * DAT1 DAT1 + * + * Here, the level shifters used are the Adafruit "4-channel I2C-safe + * Bi-directional Logic Level Converter - BSS138" boards: + * + * https://www.adafruit.com/products/757 */ #define LCD_BACKLIGHT UBB_DAT2