{"action":"created","issue":{"url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/1745","repository_url":"https://api.github.com/repos/IntelRealSense/librealsense","labels_url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/1745/labels{/name}","comments_url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/1745/comments","events_url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/1745/events","html_url":"https://github.com/IntelRealSense/librealsense/issues/1745","id":325290275,"node_id":"MDU6SXNzdWUzMjUyOTAyNzU=","number":1745,"title":"how to use HW SYNC with multi cameras? ","user":{"login":"Yusnows","id":25427848,"node_id":"MDQ6VXNlcjI1NDI3ODQ4","avatar_url":"https://avatars0.githubusercontent.com/u/25427848?v=4","gravatar_id":"","url":"https://api.github.com/users/Yusnows","html_url":"https://github.com/Yusnows","followers_url":"https://api.github.com/users/Yusnows/followers","following_url":"https://api.github.com/users/Yusnows/following{/other_user}","gists_url":"https://api.github.com/users/Yusnows/gists{/gist_id}","starred_url":"https://api.github.com/users/Yusnows/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Yusnows/subscriptions","organizations_url":"https://api.github.com/users/Yusnows/orgs","repos_url":"https://api.github.com/users/Yusnows/repos","events_url":"https://api.github.com/users/Yusnows/events{/privacy}","received_events_url":"https://api.github.com/users/Yusnows/received_events","type":"User","site_admin":false},"labels":[{"id":692642573,"node_id":"MDU6TGFiZWw2OTI2NDI1NzM=","url":"https://api.github.com/repos/IntelRealSense/librealsense/labels/D400%20Series","name":"D400 Series","color":"c5def5","default":false},{"id":315406404,"node_id":"MDU6TGFiZWwzMTU0MDY0MDQ=","url":"https://api.github.com/repos/IntelRealSense/librealsense/labels/firmware","name":"firmware","color":"eb6420","default":false},{"id":335156403,"node_id":"MDU6TGFiZWwzMzUxNTY0MDM=","url":"https://api.github.com/repos/IntelRealSense/librealsense/labels/hardware","name":"hardware","color":"fbca04","default":false},{"id":288064121,"node_id":"MDU6TGFiZWwyODgwNjQxMjE=","url":"https://api.github.com/repos/IntelRealSense/librealsense/labels/question","name":"question","color":"bfe5bf","default":true}],"state":"open","locked":false,"assignee":{"login":"RealSense-Customer-Engineering","id":34384799,"node_id":"MDQ6VXNlcjM0Mzg0Nzk5","avatar_url":"https://avatars0.githubusercontent.com/u/34384799?v=4","gravatar_id":"","url":"https://api.github.com/users/RealSense-Customer-Engineering","html_url":"https://github.com/RealSense-Customer-Engineering","followers_url":"https://api.github.com/users/RealSense-Customer-Engineering/followers","following_url":"https://api.github.com/users/RealSense-Customer-Engineering/following{/other_user}","gists_url":"https://api.github.com/users/RealSense-Customer-Engineering/gists{/gist_id}","starred_url":"https://api.github.com/users/RealSense-Customer-Engineering/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/RealSense-Customer-Engineering/subscriptions","organizations_url":"https://api.github.com/users/RealSense-Customer-Engineering/orgs","repos_url":"https://api.github.com/users/RealSense-Customer-Engineering/repos","events_url":"https://api.github.com/users/RealSense-Customer-Engineering/events{/privacy}","received_events_url":"https://api.github.com/users/RealSense-Customer-Engineering/received_events","type":"User","site_admin":false},"assignees":[{"login":"RealSense-Customer-Engineering","id":34384799,"node_id":"MDQ6VXNlcjM0Mzg0Nzk5","avatar_url":"https://avatars0.githubusercontent.com/u/34384799?v=4","gravatar_id":"","url":"https://api.github.com/users/RealSense-Customer-Engineering","html_url":"https://github.com/RealSense-Customer-Engineering","followers_url":"https://api.github.com/users/RealSense-Customer-Engineering/followers","following_url":"https://api.github.com/users/RealSense-Customer-Engineering/following{/other_user}","gists_url":"https://api.github.com/users/RealSense-Customer-Engineering/gists{/gist_id}","starred_url":"https://api.github.com/users/RealSense-Customer-Engineering/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/RealSense-Customer-Engineering/subscriptions","organizations_url":"https://api.github.com/users/RealSense-Customer-Engineering/orgs","repos_url":"https://api.github.com/users/RealSense-Customer-Engineering/repos","events_url":"https://api.github.com/users/RealSense-Customer-Engineering/events{/privacy}","received_events_url":"https://api.github.com/users/RealSense-Customer-Engineering/received_events","type":"User","site_admin":false}],"milestone":null,"comments":8,"created_at":"2018-05-22T13:19:18Z","updated_at":"2018-08-09T05:36:30Z","closed_at":null,"author_association":"NONE","body":"I want to use multi cameras, and I try use the HW sync with them.\r\n\r\nI follow the \"multi camera white paper\" to do somethings. but it seems not work at all. the cameras just behave themselves. \r\n\r\nI use the function ` rs2_send_and_receive_raw_data(pdev, maser_cmd, 254, NULL); ` to set a camera to be master. and ` rs2_send_and_receive_raw_data(pdev, slave_cmd, 25, NULL); ` to set the other to be slave. and `master_cmd ` is set to be an array `uint8_t maser_cmd[25] = { 0x0,0x14,0x0,0xAB,0xCD,0x64,0x0,0x0,0x0,0x01,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0 }; ` , ` slave_cmd ` is ` uint8_t slave_cmd[25] = { 0x0,0x14,0x0,0xAB,0xCD,0x64,0x0,0x0,0x0,0x02,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0 }; `.\r\n\r\nI also use an  oscilloscope to see if the master camera's sync pin output any signal. the fact is it didn't.\r\n\r\nthe multi camera white paper that I mention above is [this](https://www.intel.com/content/dam/support/us/en/documents/emerging-technologies/intel-realsense-technology/RealSense_Multiple_Camera_WhitePaper.pdf)\r\n\r\nAnyone have done this? please help.\r\n\r\nThank you!\r\n"},"comment":{"url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/comments/411642285","html_url":"https://github.com/IntelRealSense/librealsense/issues/1745#issuecomment-411642285","issue_url":"https://api.github.com/repos/IntelRealSense/librealsense/issues/1745","id":411642285,"node_id":"MDEyOklzc3VlQ29tbWVudDQxMTY0MjI4NQ==","user":{"login":"RealSense-Customer-Engineering","id":34384799,"node_id":"MDQ6VXNlcjM0Mzg0Nzk5","avatar_url":"https://avatars0.githubusercontent.com/u/34384799?v=4","gravatar_id":"","url":"https://api.github.com/users/RealSense-Customer-Engineering","html_url":"https://github.com/RealSense-Customer-Engineering","followers_url":"https://api.github.com/users/RealSense-Customer-Engineering/followers","following_url":"https://api.github.com/users/RealSense-Customer-Engineering/following{/other_user}","gists_url":"https://api.github.com/users/RealSense-Customer-Engineering/gists{/gist_id}","starred_url":"https://api.github.com/users/RealSense-Customer-Engineering/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/RealSense-Customer-Engineering/subscriptions","organizations_url":"https://api.github.com/users/RealSense-Customer-Engineering/orgs","repos_url":"https://api.github.com/users/RealSense-Customer-Engineering/repos","events_url":"https://api.github.com/users/RealSense-Customer-Engineering/events{/privacy}","received_events_url":"https://api.github.com/users/RealSense-Customer-Engineering/received_events","type":"User","site_admin":false},"created_at":"2018-08-09T05:36:30Z","updated_at":"2018-08-09T05:36:30Z","author_association":"COLLABORATOR","body":"[Realsense Customer Engineering Team Comment]\nhi @Yusnows,\nare you using D435? or do you need more support on this?"}}
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