Week 6

Step 1

I downloaded the Hello World board files neededhere

HelloBoard1

Then i was able to make a list of the needed components

A 20 MHz Resonator, a 10k Resistor, a 1uF Capacitor, a Attiny 44, a ftdi-sm-header, and a AVRISPMD, a 6x6mm switch and a 1206 LED. The 20 Mhz Crtistal is optional, i will use the 8 Mhz internal clock of the chip

Step 2

I created a new project called HelloBoard in Eagle

HelloBoard2

HelloBoard3

Step 3

i downloaded the fab.lbr library and copied it into the Eagle library folder here

HelloBoard4

HelloBoard5

Step 4

Back in Eagle i created a new schematic, i saved it and i displayed the grid to make things easer

HelloBoard6

HelloBoard7

HelloBoard8

HelloBoard9

Step 5

I went to the library settings to choose the fab library and i created my components on the grid

HelloBoard10

HelloBoard11

HelloBoard12

To add a component select it in the library and click "OK". Then you can place you component (right click to turn it) and click left to put it on the grid

HelloBoard13

Link them, add the labels and values, and add the led the button and the resistor (note that it shouldn't be a 499 but i know i have one in 1206 that will do the job)

HelloBoard15

Step 6

I switched to board, placed the components, and used the auto-routing command to get a board

HelloBoard16

Then i entered my milling machine rules in the DRC (The ERC was ok) and i checked the board : No problemo

HelloBoard20

I didn't milled the board because i want to be sure i'll do it for the good components

Step 7

At the lab we have a very cool reflow hoven from Beta Layout that works really well, and i wish to do my soldering with it

HelloBoard164

The only thing missing is the way to produce the stencils, so i made some (succesfull) tries

So i exported in .dxf from Eagle the pads of my board (to do so just display the tCream layer in Ealge before to export)

HelloBoard165

The plotter was not strong enough to cut the 0.14mm Acetate film, so i tried it with the Laser cutter

HelloBoard19

After a few ones, i've found the good setting (30% speed / 4% power)

HelloBoard18

Step 8

Now we have the needed components, so i stuffed a first board milled with the CIF, but i haven't been able to program it

HelloBoard21

I tried to look at every Solder, i changed some components but i've found no way to program it

HelloBoard22

So then i did an other board (with modela and fab module). I stuffed it, but there was a cutted trace, so i did a bridge with a cable to fix it.

HelloBoard23

I tried to program it another time but i still received the same error message.

C:\>cd dev\Hello
c:\dev\Hello>make -f hello.ftdi.44.echo.interrupt.c.make
avr-gcc -mmcu=attiny44 -Wall -Os -DF_CPU=20000000 -I./ -o hello.ftdi.44.echo.interrupt.out hello.ftdi.44.echo.interrupt.c
avr-objcopy -O ihex hello.ftdi.44.echo.interrupt.out hello.ftdi.44.echo.interrupt.c.hex;\
avr-size --mcu=attiny44 --format=avr hello.ftdi.44.echo.interrupt.out
AVR Memory Usage
----------------
Device: attiny44
Program: 790 bytes (19.3% Full)
(.text + .data + .bootloader)
Data: 74 bytes (28.9% Full)
(.data + .bss + .noinit)
c:\dev\Hello>make -f hello.ftdi.44.echo.interrupt.c.make program-usbtiny-fuses
avr-objcopy -O ihex hello.ftdi.44.echo.interrupt.out hello.ftdi.44.echo.interrupt.c.hex;\
avr-size --mcu=attiny44 --format=avr hello.ftdi.44.echo.interrupt.out
AVR Memory Usage
----------------
Device: attiny44
Program: 790 bytes (19.3% Full)
(.text + .data + .bootloader)
Data: 74 bytes (28.9% Full)
(.data + .bss + .noinit)
avrdude -p t44 -P usb -c usbtiny -U lfuse:w:0x5E:m
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override this check.
avrdude done. Thank you.
make: *** [program-usbtiny-fuses] Error 1