Fab Academy 2016 - ShinoOnodera

11.INPUT DEVICES

Apr 13, 2016

This week's assignment is measuring something: add a sensor to a microcontroller board that you have designed and read it.

[Tool]
Software :Eagle (MacOSX) > Fabmodule (ubuntu)
CNC Milling machine : Roland MODELA MDX-20

11-1.Board design

For this assignment I choose a force sensor. And I used the data of temperature sensor as reference.
Data > hello.temp.45.png
(I bought a force sensorr at 秋月(Akizuki).)

I created a schematic with Eagle that is PCB Design Software. I replaced temperature sensor of the reference data with force sensor.
After that, I designed a board and save files as monochrome png data with 1000dpi.
png Data > input_150503_cut.png , input_150503_trace.png
Eagle Data > 160503.sch , 160503.brd

And Components that I used are as follows.
[Components]
- ATtiny45 x1
- 6 Pin SMD Type Male Headers
- 1uf Capacitor x1
- Attiny45 x1
- 3x2 Pinheads connector x1
- 10k Resistor x4
- Force sensor x1

11-2.Assemble

Next, I milled a board with CNC milling machine. I processed it in reference to the assignment of Week04.

It is recommended to collect components in this way.

Then, I soldered components and I colored lines. In this way, the position of a power supply and the ground became easy to find.(and cute!)

11-3.Measuring 'something'

I used following Neil's program.
Data > hello.temp.45.c / hello.temp.45.make

And I programed this code by using AVR.

Last login: Wed Apr 27 21:40:15 on ttys000
You have mail.
shino-mac-3:~ shino$ cd desktop
shino-mac-3:desktop shino$ cd fabacademy
shino-mac-3:fabacademy shino$ cd makedata
shino-mac-3:makedata shino$ cd work11
shino-mac-3:work11 shino$ cd input
shino-mac-3:input shino$ ls
hello.temp.45.c		hello.temp.45.make
shino-mac-3:input shino$ sudo make -f hello.temp.45.make
Password:
avr-gcc -mmcu=attiny45 -Wall -Os -DF_CPU=8000000 -I./ -o hello.temp.45.out hello.temp.45.c
avr-objcopy -O ihex hello.temp.45.out hello.temp.45.c.hex;\
	avr-size --mcu=attiny45 --format=avr hello.temp.45.out
AVR Memory Usage
----------------
Device: attiny45

Program:     504 bytes (12.3% Full)
(.text + .data + .bootloader)

Data:          1 bytes (0.4% Full)
(.data + .bss + .noinit)

shino-mac-3:input shino$ ls
hello.temp.45.c		hello.temp.45.c.hex	hello.temp.45.make	hello.temp.45.out
shino-mac-3:input shino$ cat hello.temp.45.make
PROJECT=hello.temp.45
SOURCES=$(PROJECT).c
MMCU=attiny45
F_CPU = 8000000

CFLAGS=-mmcu=$(MMCU) -Wall -Os -DF_CPU=$(F_CPU)

$(PROJECT).hex: $(PROJECT).out
	avr-objcopy -O ihex $(PROJECT).out $(PROJECT).c.hex;\
	avr-size --mcu=$(MMCU) --format=avr $(PROJECT).out
 
$(PROJECT).out: $(SOURCES)
	avr-gcc $(CFLAGS) -I./ -o $(PROJECT).out $(SOURCES)
 
program-bsd: $(PROJECT).hex
	avrdude -p t45 -c bsd -U flash:w:$(PROJECT).c.hex

program-dasa: $(PROJECT).hex
	avrdude -p t45 -P /dev/ttyUSB0 -c dasa -U flash:w:$(PROJECT).c.hex

program-avrisp2: $(PROJECT).hex
	avrdude -p t45 -P usb -c avrisp2 -U flash:w:$(PROJECT).c.hex

program-usbtiny: $(PROJECT).hex
	avrdude -p t45 -P usb -c usbtiny -U flash:w:$(PROJECT).c.hex

program-dragon: $(PROJECT).hex
	avrdude -p t45 -P usb -c dragon_isp -U flash:w:$(PROJECT).c.hex
shino-mac-3:input shino$ sudo make -f hello.temp.45.make program-avrisp2
avr-objcopy -O ihex hello.temp.45.out hello.temp.45.c.hex;\
	avr-size --mcu=attiny45 --format=avr hello.temp.45.out
AVR Memory Usage
----------------
Device: attiny45

Program:     504 bytes (12.3% Full)
(.text + .data + .bootloader)

Data:          1 bytes (0.4% Full)
(.data + .bss + .noinit)

avrdude -p t45 -P usb -c avrisp2 -U flash:w:hello.temp.45.c.hex

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9206
avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "hello.temp.45.c.hex"
avrdude: input file hello.temp.45.c.hex auto detected as Intel Hex
avrdude: writing flash (504 bytes):

Writing | ################################################## | 100% 0.18s

avrdude: 504 bytes of flash written
avrdude: verifying flash memory against hello.temp.45.c.hex:
avrdude: load data flash data from input file hello.temp.45.c.hex:
avrdude: input file hello.temp.45.c.hex auto detected as Intel Hex
avrdude: input file hello.temp.45.c.hex contains 504 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.16s

avrdude: verifying ...
avrdude: 504 bytes of flash verified

avrdude: safemode: Fuses OK (H:FF, E:DF, L:62)

avrdude done.  Thank you.

shino-mac-3:input shino$ sudo python hello.temp.45.py
command line: hello.temp.45.py serial_port
shino-mac-3:input shino$ ls /dev/tty.usb*
/dev/tty.usbserial-FTHBRG3N
shino-mac-3:input shino$ sudo python hello.temp.45.py /dev/tty.usbserial-FTHBRG3N
shino-mac-3:input shino$

Because I used a program of temperature sensor, it reacts to weak power immediately.