{"action":"closed","issue":{"url":"https://api.github.com/repos/rwth-afu/RasPagerC9000/issues/1","repository_url":"https://api.github.com/repos/rwth-afu/RasPagerC9000","labels_url":"https://api.github.com/repos/rwth-afu/RasPagerC9000/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/rwth-afu/RasPagerC9000/issues/1/comments","events_url":"https://api.github.com/repos/rwth-afu/RasPagerC9000/issues/1/events","html_url":"https://github.com/rwth-afu/RasPagerC9000/issues/1","id":186544576,"number":1,"title":"UART Baudrate","user":{"login":"7h0ma5","id":88706,"avatar_url":"https://avatars.githubusercontent.com/u/88706?v=3","gravatar_id":"","url":"https://api.github.com/users/7h0ma5","html_url":"https://github.com/7h0ma5","followers_url":"https://api.github.com/users/7h0ma5/followers","following_url":"https://api.github.com/users/7h0ma5/following{/other_user}","gists_url":"https://api.github.com/users/7h0ma5/gists{/gist_id}","starred_url":"https://api.github.com/users/7h0ma5/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/7h0ma5/subscriptions","organizations_url":"https://api.github.com/users/7h0ma5/orgs","repos_url":"https://api.github.com/users/7h0ma5/repos","events_url":"https://api.github.com/users/7h0ma5/events{/privacy}","received_events_url":"https://api.github.com/users/7h0ma5/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":{"login":"MarvinMenzerath","id":2064514,"avatar_url":"https://avatars.githubusercontent.com/u/2064514?v=3","gravatar_id":"","url":"https://api.github.com/users/MarvinMenzerath","html_url":"https://github.com/MarvinMenzerath","followers_url":"https://api.github.com/users/MarvinMenzerath/followers","following_url":"https://api.github.com/users/MarvinMenzerath/following{/other_user}","gists_url":"https://api.github.com/users/MarvinMenzerath/gists{/gist_id}","starred_url":"https://api.github.com/users/MarvinMenzerath/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/MarvinMenzerath/subscriptions","organizations_url":"https://api.github.com/users/MarvinMenzerath/orgs","repos_url":"https://api.github.com/users/MarvinMenzerath/repos","events_url":"https://api.github.com/users/MarvinMenzerath/events{/privacy}","received_events_url":"https://api.github.com/users/MarvinMenzerath/received_events","type":"User","site_admin":false},"assignees":[{"login":"MarvinMenzerath","id":2064514,"avatar_url":"https://avatars.githubusercontent.com/u/2064514?v=3","gravatar_id":"","url":"https://api.github.com/users/MarvinMenzerath","html_url":"https://github.com/MarvinMenzerath","followers_url":"https://api.github.com/users/MarvinMenzerath/followers","following_url":"https://api.github.com/users/MarvinMenzerath/following{/other_user}","gists_url":"https://api.github.com/users/MarvinMenzerath/gists{/gist_id}","starred_url":"https://api.github.com/users/MarvinMenzerath/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/MarvinMenzerath/subscriptions","organizations_url":"https://api.github.com/users/MarvinMenzerath/orgs","repos_url":"https://api.github.com/users/MarvinMenzerath/repos","events_url":"https://api.github.com/users/MarvinMenzerath/events{/privacy}","received_events_url":"https://api.github.com/users/MarvinMenzerath/received_events","type":"User","site_admin":false},{"login":"dh3wr","id":16710361,"avatar_url":"https://avatars.githubusercontent.com/u/16710361?v=3","gravatar_id":"","url":"https://api.github.com/users/dh3wr","html_url":"https://github.com/dh3wr","followers_url":"https://api.github.com/users/dh3wr/followers","following_url":"https://api.github.com/users/dh3wr/following{/other_user}","gists_url":"https://api.github.com/users/dh3wr/gists{/gist_id}","starred_url":"https://api.github.com/users/dh3wr/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dh3wr/subscriptions","organizations_url":"https://api.github.com/users/dh3wr/orgs","repos_url":"https://api.github.com/users/dh3wr/repos","events_url":"https://api.github.com/users/dh3wr/events{/privacy}","received_events_url":"https://api.github.com/users/dh3wr/received_events","type":"User","site_admin":false}],"milestone":null,"comments":2,"created_at":"2016-11-01T14:16:45Z","updated_at":"2016-11-02T12:06:05Z","closed_at":"2016-11-02T12:06:05Z","body":"Mit dem 8 MHz-Quarz sind 57600 baud leider nur mit einer Abweichung von 2.1 % möglich. Dazu kommt dann noch die Abweichung des Taktes vom Raspberry Pi, welche sich entweder positiv oder negativ darauf auswirken kann. Ich schlage vor, die Baudrate entweder auf 38400 baud oder auf 76800 baud zu ändern, da die Abweichung dann nur 0.2 % beträgt.\r\n\r\nMögliche Baudraten für f<sub>osc</sub> = 8 MHz:\r\n<table>\r\n  <tr>\r\n    <th></th>\r\n    <th colspan=\"2\">U2X = 0</th>\r\n    <th colspan=\"2\">U2X = 1</th>\r\n  </tr>\r\n  <tr>\r\n    <th>Baudrate</th>\r\n    <th>UBRR</th>\r\n    <th>Error</th>\r\n    <th>UBRR</th>\r\n    <th>Error</th>\r\n  </tr>\r\n  <tr>\r\n    <td>9600</td>\r\n    <td><b>51</b></td>\r\n    <td><b>0.2 %</b></td>\r\n    <td><b>103</b></td>\r\n    <td><b>0.2 %</b></td>\r\n  </tr>\r\n  <tr>\r\n    <td>14400</td>\r\n    <td>34</td>\r\n    <td>-0.8 %</td>\r\n    <td>68</td>\r\n    <td>0.6 %</td>\r\n  </tr>\r\n  <tr>\r\n    <td>19200</td>\r\n    <td><b>25</b></td>\r\n    <td><b>0.2 %</b></td>\r\n    <td><b>51</b></td>\r\n    <td><b>0.2 %</b></td>\r\n  </tr>\r\n  <tr>\r\n    <td>28800</td>\r\n    <td>16</td>\r\n    <td>2.1 %</td>\r\n    <td>34</td>\r\n    <td>-0.8 %</td>\r\n  </tr>\r\n  <tr>\r\n    <td>38400</td>\r\n    <td><b>12</b></td>\r\n    <td><b>0.2 %</b></td>\r\n    <td><b>25</b></td>\r\n    <td><b>0.2 %</b></td>\r\n  </tr>\r\n  <tr>\r\n    <td>57600</td>\r\n    <td>8</td>\r\n    <td>-3.5 %</td>\r\n    <td>16</td>\r\n    <td>2.1 %</td>\r\n  </tr>\r\n  <tr>\r\n    <td>76800</td>\r\n    <td>6</td>\r\n    <td>-7.0 %</td>\r\n    <td><b>12</b></td>\r\n    <td><b>0.2 %</b></td>\r\n  </tr>\r\n  <tr>\r\n    <td>115200</td>\r\n    <td>3</td>\r\n    <td>8.5 %</td>\r\n    <td>8</td>\r\n    <td>-3.5 %</td>\r\n  </tr>\r\n</table>\r\n"}}
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