Install usart driver interface when building libcsp with usart driver
Install usart driver interface when building libcsp with usart driver

pacheco017/libcsp,GomSpace/libcsp,kubostech/KubOS,Psykar/kubos,marshall/libcsp,Psykar/kubos,satlab/libcsp,Psykar/kubos,marshall/libcsp,libcsp/libcsp,libcsp/libcsp,GomSpace/libcsp,pacheco017/libcsp,Psykar/kubos,GomSpace/libcsp,kubostech/KubOS,Psykar/kubos,Psykar/kubos,satlab/libcsp,pacheco017/libcsp,Psykar/kubos,satlab/libcsp,pacheco017/libcsp,marshall/libcsp