Final Project
Week 0: Digital Fabrication Principles and
Practices
Week 1:
Collaborative Technical Development, Documentation and Project
Management
Week 2:
Computer Aided Design
Week 3:
Computer Controlled Cutting
Week 4:
Electronics Production
Week 5:
3D Scanning and Printing
Week 6:
Electronics Design
Week 7:
Moulding and Casting
Week 8:
Embedded Programming
Week 9:
Computer Controlled Machining
Week 10:
Input Devices
Week 11:
Composites
Week 12:
Interface and Application Programming
Week 13:
Output Devices
Week 14:
Networking and Communications
Week 15:
Mechanical Design and Machine Design
Week 16:
Applications and Implications
Week 17:
Invention, Intellectual Property and Income
Week 18:
Project Development
Week 19:
Final Project Presentation
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Networking and Communication
The
project for this week was to build a wired or wireless network with at
least two nodes, similarly with the assignment last week my
understanding of electronics is fairly minimal so I decided to use the
asynchronous example shown within the class pages as a learning exercise.
I milled and stuffed the bus and the two nodes using the techniques developed in previous weeks.
Programming the network:
Once
the boards were stuffed, the boards had to be programmed with
sequential numbering to allow for effective communication between the
bus and the nodes. Before programming each board it was necessary
to alter the line #define node_id '0' within
the C Code to the corresponding number of the board within the network
(i.e. bridge, ID = 0 & node 1, ID =1 , node 2 ID = 2 etc).
The board is then flashed by typing sudo make -f hello.bus.45.make
program-usbtiny , I had a minor problem with the hello.bus.45.c as when I first tried to program the board I got the error message:
Thomas-Bells-MacBook-Pro:week14 thomasbell$ sudo make -f hello.bus.45.make program-usbtiny
avr-gcc -mmcu=attiny45 -Wall -Os -DF_CPU=8000000 -I./ -o hello.bus.45.out hello.bus.45.c
hello.bus.45.c: In function 'main':
hello.bus.45.c:220:22: error: variable 'message' must be const in order
to be put into read-only section by means of '__attribute__((progmem))'
make: *** [hello.bus.45.out] Error 1
To amend this issue I had to edit the hello.bus.45.c file by altering line 220 so it says:
const static char message[] PROGMEM = "node ";
This problem may well only be limited to OSX, the successful flashing of a board is shown below:
Communicating to the network:
Initially I
started communicating with the network through Arduino by selecting the
serial monitor option and ensuring the baud rate is set to 9600.
Once this is setup you can communicate through the serial monitor by
simply by typing in the number of the corresponding node and hitting
enter to flash the correct LED after all the LED have been lit.
Secondarily I use the Python script found here
to communicate with my network by finding the relevant port by typing
ls /dev/tty.usb* within terminal when the FTDI cable is connected to
the network. Then by typing
python term.py /dev/tty.usbserial-FT????? 9600
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FAB ACADEMY 2013
