Video Player help: In case you can't play the video go get the open-source VLC player from: http://www.videolan.org/
Before starting with this step, watch this video.
In this video you the assembly and testing of some components which are simple to solder is shown. These components are: - L1 - Ferrite Bead filtering noise out of the 5V coming from the USB host. - R4 - 220 Ohm resistor limiting the current for the PWR LED - C5 - 100nF cap buffering the 5V rail - PWR - green LED showing that the board is receiving power over USB - X2 - female mini-USB type B connector
After all these components are soldered, the green LED should go on once you connect your board to a computer…
Measure the voltage across C5. It must be within 5V +/- 5%.
Solder: - U2 - Linear Regulator 3.3V - C1 - 4.7uF cap buffering the 3.3V rail - C2 - 100nF cap buffering the 3.3V rail
Measure the 3.3V rail voltage over C1 or C2. The voltage must be within 3.3V +/- 5%.
Before soldering the next components, watch this video: [https://neuromorphs.net/2010-smd-usb/video/sc05-avr32-crystal.avi sc05-avr32-crystal.avi]
In case you create bridges between the microcontroller pins:
Now it is time to solder: - U1 - our USB microcontroller AT32UC3B1256 - Q1 - The 12MHz crystal
If you are confident that U1 and Q1 have been soldered correctly, you can solder the remaining (easy) components: - C8 - 100nF cap buffering the 3.3V rail - C3 - 100nF cap buffering the 1.8V rail - C4 - 2.2uF cap buffering the 1.8V rail - C7 & C6 - the 16pF crystal load capacitors - R3 - 47kOhm TCK pullup resistor - R1 & R2 - 39Ohm USB data lines series resistors - RST & DFU - the two micro switches
After plugging in the board to a computer, check all rail voltages again:
|C5||5.0V +/- 5%|
|C1||3.3V +/- 5%|
|C4||1.8V +/- 5%|
If any of the voltages are out of range
'disconnect the board immediately' and start visual inspection, and have someone else look at the board.
Let's check the oscillator: * Attach a wire to some GND pin. * Connect the scope ground clamp to the wire * Check the signal on C7, on the non GND side (not the C-side, the 7-side…) * You should see a (more or less sinusoidal) 12MHz signal with about 1Vpp amplitude…
Connect your board to a Linux computer, then run the command
'lsusb' in a shell.
Besides other devices you should see: bus_device}
To get further information on what Linux found out about the device, run
'sudo lsusb -d 03eb:2ff6 -v'
You should get this: bus_device}
' You made it till down here? Congratulations! ' Your board passed all tests that do not require a
'test-firmware' to be flashed…
Continue on the:
'[wiki:2010/usb10/AtmelAVR32 Atmel ACR32 USB firmware page]'…