This is a learning and developping interface written in PLT Scheme for the 8 bits MCU built by Microchip PIC16F8x.
Datasheet of component. Documentation in french and english are given with the package. Display is 1024x768.
This Project is open source, and given not compiled. You need PLT scheme to run it.
Warning: Registers number in the real MCU are not 256 ! To produce real code, you need to stay between 0x0c and 0x50.
Download project sources: PIC-simulator-scm.tar.gz
Documentation in english: doc_en.txt
Documentation in french: documentation.txt
Updates 28-03-2004: (docs still not updated)
made hex2scheme function: takes a hex string and gives the scheme program runnable in the project.
Updates 19-01-2004: (docs not updated for this)
fixed bug with ORG and NOP for missing lines.
hex output bug fix with no END keyword at eof.
load file remade.
files are (really!) in plain text format.
Thanks to the PLT-scheme mailing list and Mr Roy :-)
This is a parallel port interface, software oriented, for stepper motors. It can drives two motors, with 500mA output current per phase. As parport cannot directly give this power, we use two ULN2003 darlington array of 7 pairs (we need 8 pairs...). What you only need is :
Not hard to build ! The board with one motor plugged - The back of the board
Here is the basic code to make it turn. stepper.c and port.h.
It must be run as root, compiled with a correct PORT value (watch your dmesg).
This little utilty is used to display images grabbed from a philips webcam under linux. It was designed to be fast, using MIT X Shared memory extension and Xlib. It also dumps ppm files.
Keybindings are: 'd' for dump, 'g' to switch black and white or color mode, 'q' to quit.
The harder was to find a fast yuv420p to rgb color conversion routine...
You will need several libraries and includes to compile, for example:
gcc -O3 -o webcam webcam-xlib-shm.c -I/usr/src/linux/drivers/usb/media/ -L/usr/X11R6/lib -lX11 -lXext
warning: include dir in new pwc (free version 10) is /usr/src/linux/drivers/usb/media/pwcDownload webcam-xlib-shm.c (01/2005)
If you have two philips cameras and that you want to display them at the same time ? (this does not work with some versions of linux and pwc, kernel bugs...)Download double-webcam-xlib-shm.c (11/2004)
Takafumi Mizuno userland utilities for NetBSD/FreeBSD. Patch for pwc-9.0.2, patch for pwc-10.0.5 (free pwc) with support of VGA images.Download page
You think building a 3D scanner is hard ? Take your webcam and check this out !