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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Using CFFI with c_environment","articleBody":"The python lib provided for pcduino with gpio lacks quite a bit. In particular I am interested in in pulseIn function, which is not available. I tried to write my own, but I get strange behavior (this is for HC-SR04 distance sensor).\nI see that another issue was closed asking people to use CFFI. It is not clear to me how to use it, so I tried the following and failed with ugly compile errors:\n\n```\nfrom cffi import FFI\nffi = FFI()\nlib = ffi.verify(\"#include \u003c~/c_enviroment/sample/core.h\u003e\")\n```\n\nas you can see I did not get far ( I am sure I am doing something totally wrong). I get this error:\n\n  File \"/usr/local/lib/python2.7/dist-packages/cffi/ffiplatform.py\", line 51, in _build\n    raise VerificationError('%s: %s' % (e.__class__.**name**, e))\ncffi.ffiplatform.VerificationError: CompileError: command 'gcc' failed with exit status 1\n\nI have also tried:\n\n```\nffi.verify(\"#include \\\"/home/ubuntu/c_enviroment/sample/core.h\\\"\")\n```\n\nThis time it will find core.h, but complain that it can not find all the other .h files like Arduino.h that core.h refers too.\n\nI would appreciate your help. Thank you\n","author":{"url":"https://github.com/sheepcloner","@type":"Person","name":"sheepcloner"},"datePublished":"2015-01-26T22:35:21.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/7/python-pcduino/issues/7"}