[Arm-netbook] laptop_15in working PCB2!

[Luke Kenneth Casson Leighton]

yippee, i tested the PCB2 i put together yesterday, and successfully
uploaded a test program to it, turning it into an example USB-HID
"mouse" that generates events, wobbling the cursor back and forwards.

over the past few days i found someone who coincidentally maintains a
branch with USB support for the exact STM32F model ARM Cortex M0 that
i chose, and i got a working "usb hid" example up and running on a
demo board i have, here ($EUR 10 retail.  amazing).

yesterday i populated PCB2 with components, i had got the STM32F072
the wrong way round, burned one out!  used the IR solderer to remove
it and stuck a new one down, this time the right way round :)  then,
with a lot of fiddling i managed to get the right connections to reset
and put it into "DFU" - device firmware upload - mode.

then i just uploaded the firmware tested previously on the demo board,
and yay it worked.

so i will do a bit more firmware programming, there is the keyboard
matrix to do, I2C interface for the touchpanel (converting to real
USB-HID events), and also there is the SPI interface for the 480x320
LCD.  testing the LCD and capacitive panel for the first time will be
interesting.

l.