{"id":1333,"date":"2017-12-18T11:34:36","date_gmt":"2017-12-18T10:34:36","guid":{"rendered":"https:\/\/dmunkes.de\/WP\/?p=1333"},"modified":"2018-04-19T22:03:20","modified_gmt":"2018-04-19T21:03:20","slug":"lifetime-test-equipment-with-broadr-reach","status":"publish","type":"post","link":"https:\/\/dmunkes.de\/WP\/lifetime-test-equipment-with-broadr-reach\/?lang=en","title":{"rendered":"Lifetime test equipment with BroadR-Reach"},"content":{"rendered":"

Testequipment with BroadR-Reach<\/h1><\/h1><\/div>
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Ing. Buero Dieter Munkes News   \u2022   Sept 2, 2017<\/p>\n<\/div>

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A<\/span>ctual communication in cars changes. We know LIN , CNA over the years, but now we are moving to BroadR-Reach.<\/p>\n

Some words about:<\/h4>\n
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  • Developed to cover the last mile in connecting houses.<\/li>\n
  • 100Mbit over 2 twisted wires.<\/li>\n
  • classic TCP\/IP with changed physical layer.<\/li>\n
  • Chipset is cheap and avaliable.<\/li>\n<\/ul>\n

    Sound fine , but what is the physical parameters for use in a car?<\/h4>\n

    TPC\/IP is pear to peer. There is no big switch in the middel of a car.<\/p>\n

    Every device has to have minimum 2 ports and a kind of switch. (chaining)<\/p>\n

    With this it can pick the interesting informations out of the stream and route the remaining.<\/p>\n

     <\/p>\n

    Build test equipment<\/h4>\n

    We got the order to build a tester with 6 simultaus devices running in climate-chamber.<\/p>\n

    They need to hold in sleep and life state, measure parameters and communicate to get errors and function tests.<\/p>\n

    BroadR-Reach can be done by media converter.<\/p>\n

    Fine so far, just one PC, one switch and 6 media converter…. we offered.<\/p>\n

    During setup we found:<\/p>\n

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    • All devices have the same fixed IP adress and same MAC-adress.<\/li>\n
    • NO router in the world will handle this (or get real expensive)<\/li>\n
    • The device sends everthing with TTL=1 -> no one route this<\/li>\n
    • It uses for network keep alive multicast and for camera data broadcast.<\/li>\n
    • Data content was like CAN over TPC<\/li>\n<\/ul>\n

      How we got this done:<\/p>\n

      We took 12 Raspberry PI on boards with UPS in one row. Add additional NIC to them.<\/p>\n

      Write some services in python for moving and nating  data between the networks.<\/p>\n

      With this the PC see everything in a normal network. The PC see every device now in it\u00b4s own range.<\/p>\n

       <\/p>\n

      Finally, everything was fine. But we learned again that automotive may be special.<\/p>\n

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      <\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":58,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[52,53,51,54],"class_list":["post-1333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-broadr-reach","tag-lifetime","tag-productvalidation","tag-tester"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t