[cm3] add missing declaration for systick_get_reload
CAN support STM32F4
fix stm32f4 sdio base adress
fix stm32f2 sdio base adress
Merge pull request #100 from alex-n-/master

stm32f4 forgotten can.o in Makefile. fix sdio base adress stm32f2/stm32f4
ADC: Fix CR usage in adc_enable_discontinuous_mode_regular. Fixes #101
Fixed gpio_primary_remap; swjdisable is pre-shifted and therefore needs to be u32.
FLASH: Make sure that the flash unlock register state is cleared before trying to unlock the flash.
COMMON: Fix a tiny macro typo!
Remove duplicate declaration
Added more warning CFLAGS to all makefiles.
Fix all warnings for stm32f1 lib.
Fix all warnings for stm32f2 lib.
Fix all warnings for stm32f4 lib.
Fixed all warnings in stm32l1 lib.
Fix all remaining lib warnings.
Fixed all warnings for examples.
[examples] added simple spi and dma based spi examples for stm32 f1 on Lisa/M v2 board
SPIEX: Fixed warnings in the new SPI examples.
Add a few example programs for the Leaf Maple / IteadMaple boards.