v0.1.1 Firmware

In case you don't feel like compiling it yourself, this is the pre-built firmware for the STM32F4 Discovery board.

Firmware update/install instructions:

1. Install dfu-util using your favorite package manager (e.g. 'brew install dfu-util' on OSX)
2. Connect to the stm32f4-discovery board using the micro USB cable
3. Connect PA9 to 5V to power up the board
4. Temporarily connect BOOT0 and VDD and hit the reset button, this will bring up the USB DFU bootloader
5. Run dfu-util -d 0483:df11 -c 1 -i 0 -a 0 -s 0x8000000 -D silta.bin
6. Disconnect BOOT0 and VDD and reset the board again