Discovery F3 what this is about

This is a port of the Tau Labs software to the STM32F3 Discovery board.
Its name is (surprise) "discoveryf3".

Its features are:

• STM32F303 72MHz 32bit ARM cortex-m4 power with hardware fpu
• L3GD20 gyro
• LSM303 accelerometer (magnetometer unused yet)
• FreeRTOS based OpenPilot flight control software
• compatible to stock OpenPilot GCS (enumerates as coptercontrol)
• 10 PWM inputs, 10 PWM outputs
• 2 general purpose UARTs each with selectable 3V or 5V power supply (3 additional unused)
• 1 I2C for adding external sensors (unused)
• 1 SPI for adding external sensors (unused)
• 45mm drills

Functional differences between CC3D and discoveryf3 are:

• discoveryf3 does not support I2C on FlexiPort (but has dedicated I2C)
• discoveryf3 does not (yet) support USB VCP
• discoveryf3 does not (yet) support telemetry on uart because of the missing USB vsense