{"action":"created","issue":{"url":"https://api.github.com/repos/richardghirst/PiBits/issues/54","labels_url":"https://api.github.com/repos/richardghirst/PiBits/issues/54/labels{/name}","comments_url":"https://api.github.com/repos/richardghirst/PiBits/issues/54/comments","events_url":"https://api.github.com/repos/richardghirst/PiBits/issues/54/events","html_url":"https://github.com/richardghirst/PiBits/issues/54","id":112581170,"number":54,"title":"Servoblaster PWMs (+invert not working)","user":{"login":"Victor30","id":15228581,"avatar_url":"https://avatars.githubusercontent.com/u/15228581?v=3","gravatar_id":"","url":"https://api.github.com/users/Victor30","html_url":"https://github.com/Victor30","followers_url":"https://api.github.com/users/Victor30/followers","following_url":"https://api.github.com/users/Victor30/following{/other_user}","gists_url":"https://api.github.com/users/Victor30/gists{/gist_id}","starred_url":"https://api.github.com/users/Victor30/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Victor30/subscriptions","organizations_url":"https://api.github.com/users/Victor30/orgs","repos_url":"https://api.github.com/users/Victor30/repos","events_url":"https://api.github.com/users/Victor30/events{/privacy}","received_events_url":"https://api.github.com/users/Victor30/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-10-21T12:52:19Z","updated_at":"2015-10-21T19:48:01Z","closed_at":null,"body":"Hello! I have a Pi2 and tried to use the latest version of Servoblaster. I'm trying to generate 4 PWMs for controlling 4 ESCs for a quadcopter. I'm using a USBee AX (it's like a small USB oscilloscope) for reading the signals and displaying them using sigrok (open source signal analyzer). I tried reading PWMs generated by other sources (like an Arduino) and the signals looked smooth so I don't think that what I use for reading has a problem. However when I try to read the Servoblaster signals they look like having spikes (on both high and low transitions). Also I started servod with --min=1000us --max=2000us with 20000us period (so 1 to 2 ms pulse with 20 ms period) but the readings look like high ~16ms and then low ~4ms. They don't look like the needed configuration. Also tried the --invert option but in this case no signals appear. (I'm using the userspace version)\r\n![pwm](https://cloud.githubusercontent.com/assets/15228581/10642724/d1836a64-7827-11e5-893e-1fc3100947ae.png)\r\n"},"comment":{"url":"https://api.github.com/repos/richardghirst/PiBits/issues/comments/150006007","html_url":"https://github.com/richardghirst/PiBits/issues/54#issuecomment-150006007","issue_url":"https://api.github.com/repos/richardghirst/PiBits/issues/54","id":150006007,"user":{"login":"richardghirst","id":1824945,"avatar_url":"https://avatars.githubusercontent.com/u/1824945?v=3","gravatar_id":"","url":"https://api.github.com/users/richardghirst","html_url":"https://github.com/richardghirst","followers_url":"https://api.github.com/users/richardghirst/followers","following_url":"https://api.github.com/users/richardghirst/following{/other_user}","gists_url":"https://api.github.com/users/richardghirst/gists{/gist_id}","starred_url":"https://api.github.com/users/richardghirst/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/richardghirst/subscriptions","organizations_url":"https://api.github.com/users/richardghirst/orgs","repos_url":"https://api.github.com/users/richardghirst/repos","events_url":"https://api.github.com/users/richardghirst/events{/privacy}","received_events_url":"https://api.github.com/users/richardghirst/received_events","type":"User","site_admin":false},"created_at":"2015-10-21T19:48:01Z","updated_at":"2015-10-21T19:48:01Z","body":"Please provide the actual parameters you are passing to servod, the output\nservod generates when you start it, the commands you are issuing (echo x >\n/dev/servoblaster), and the resulting signal timing you are seeing.\n\nIt works for me with a Pi2, so without any specific details of what you are\ndoing I can't help.\n\n\nOn Wed, Oct 21, 2015 at 1:52 PM, Victor30 <notifications@github.com> wrote:\n\n> Hello! I have a Pi2 and tried to use the latest version of Servoblaster.\n> I'm trying to generate 4 PWMs for controlling 4 ESCs for a quadcopter. I'm\n> using a USBee AX (it's like a small USB oscilloscope) for reading the\n> signals and displaying them using sigrok (open source signal analyzer). I\n> tried reading PWMs generated by other sources (like an Arduino) and the\n> signals looked smooth so I don't think that what I use for reading has a\n> problem. However when I try to read the Servoblaster signals they look like\n> having spikes (on both high and low transitions). Also I started servod\n> with --min=1000us --max=2000us with 20000us period (so 1 to 2 ms pulse with\n> 20 ms period) but the readings look like high ~16ms and then low ~4ms. They\n> don't look like the needed configuration. Also tried the --invert option\n> but in this case no signals appear. (I'm using the userspace version)\n>\n> —\n> Reply to this email directly or view it on GitHub\n> <https://github.com/richardghirst/PiBits/issues/54>.\n>\n"}}