periph ?= /opt/STM32F4xx_StdPeriph_Driver
discovery ?= /opt/STM32F4-Discovery_FW_V1.1.0
-pincs ?= -I$(periph)/inc -I$(discovery)/Libraries/CMSIS/ST/STM32F4xx/Include -I$(discovery)/Libraries/CMSIS/Include -Dassert_param\(x\)
+pincs ?= -I$(periph)/inc -I$(discovery)/Libraries/CMSIS/ST/STM32F4xx/Include -I$(discovery)/Libraries/CMSIS/Include -Dassert_param\(x\)=
psrc ?= /opt/STM32F4xx_StdPeriph_Driver/src