Revert "Update example.c"

This reverts commit 2b928c7ad14cac7f301615ed8843b9de5c9d3a74.
Revert "Update motordriver.c"

This reverts commit cdca6af718834e1261a3f3b440d331fe8f9358ef.
Revert "Update Makefile"

This reverts commit 2bb27d0e44baf0e88f3581dc742d4035851a5c7a.
Revert "Update example.h"

This reverts commit ec6bef2e9d3b093f54ba54d9127af9f9a5e44de1.