{"id":825,"date":"2014-08-11T12:45:13","date_gmt":"2014-08-11T12:45:13","guid":{"rendered":"http:\/\/www.horter.de\/blog\/?p=825"},"modified":"2023-01-13T15:37:33","modified_gmt":"2023-01-13T15:37:33","slug":"i2c-module-am-raspberry-pi","status":"publish","type":"post","link":"https:\/\/www.horter.de\/blog\/i2c-module-am-raspberry-pi\/","title":{"rendered":"I2C-Module am Raspberry PI"},"content":{"rendered":"<p>Mit dem I2C-Repeater k\u00f6nnen 5V I2C-Slaves direkt am Raspberry PI angeschlossen werden. Der abgebildete Testaufbau zeigt in der unteren Reihe neben dem Raspberry PI unser<\/p>\n<ul>\n<li>I2C Digital-Input-Modul (8 Bit 5-24V)<\/li>\n<li>I2C Digital-Output Modul (8 Bit 5-24V)<\/li>\n<li>I2C Analog-Input Modul (5 Kan\u00e4le 10 Bit Aufl\u00f6sung)<\/li>\n<li>I2C Analog-Output Modul\u00a0(4 Kan\u00e4le 10 Bit Aufl\u00f6sung)<\/li>\n<\/ul>\n<p>In der oberen Reihe sind die neuen Simulationsbaugruppen abgebildet. Mit Ihnen kann man die digitalen Eing\u00e4nge simulieren, f\u00fcnf Analogwerte zwischen 0-10V vorgeben und mit dem Messger\u00e4t die Spannungen sehen, die das analoge Output-Modul ausgibt.<\/p>\n<div id=\"attachment_771\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2014\/03\/PI-Schulungsaufbau1.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-771\" class=\"wp-image-771 size-medium\" src=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2014\/03\/PI-Schulungsaufbau1-300x184.jpg\" alt=\"Raspberry-PI mit I2C-Modulen\" width=\"300\" height=\"184\" srcset=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2014\/03\/PI-Schulungsaufbau1-300x184.jpg 300w, https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2014\/03\/PI-Schulungsaufbau1-730x449.jpg 730w, https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2014\/03\/PI-Schulungsaufbau1.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-771\" class=\"wp-caption-text\">Raspberry-PI mit I2C-Modulen<\/p><\/div>\n<p>&nbsp;<\/p>\n<h2>I2C-Adressen der Baugruppen am Raspberry PI herausfinden<\/h2>\n<p>Am Raspberry-k\u00f6nnen die Baugruppen dann mit folgendem Befehl am Bus detektiert werden:<\/p>\n<pre>i2cdetect -y 1<\/pre>\n<p>Als Antwort vom PI bekommt man diese Tabelle aufgelistet:<\/p>\n<pre>\u00a0\u00a0\u00a0\u00a0 0\u00a0 1\u00a0 2\u00a0 3\u00a0 4\u00a0 5\u00a0 6\u00a0 7\u00a0 8\u00a0 9\u00a0 a\u00a0 b\u00a0 c\u00a0 d\u00a0 e\u00a0 f\r\n00:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 -- -- -- -- -- 08 -- -- -- -- -- -- --\r\n10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --\r\n20: 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --\r\n30: -- -- -- -- -- -- -- -- 38 -- -- -- -- -- -- --\r\n40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --\r\n50: -- -- -- -- -- -- -- -- 58 -- -- -- -- -- -- --\r\n60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --\r\n70: -- -- -- -- -- -- -- --<\/pre>\n<p>Daraus ergeben sich folgende Adressen der Module:<\/p>\n<ul>\n<li>20hex ist das digitale Ausgabemodul (PCF 8574)<\/li>\n<li>38hex ist das digitale Eingabemodul (PCF 8574A)<\/li>\n<li>08hex ist das analoge Eingabemodul<\/li>\n<li>58 hex ist das analoge Ausgabemodul<\/li>\n<\/ul>\n<p>Bei allen Modulen sind die Jumper auf Low (unten).<\/p>\n<h2>Digitale Ausg\u00e4nge schalten<\/h2>\n<p>Zum Schalten der\u00a0Ausg\u00e4nge\u00a0am Output-Modul\u00a0muss die <span style=\"color: #008000;\"><strong>I2C-Adresse des Slaves<\/strong> <\/span>und der <strong><span style=\"color: #0000ff;\">Wert als Bitmuster <\/span>\u00a0<\/strong>gesendet werden.<\/p>\n<p>Alle Ausg\u00e4nge EIN-schalten<\/p>\n<pre>i2cset -y 1 <span style=\"color: #008000;\">0x20<\/span> <span style=\"color: #0000ff;\">0x00<\/span><\/pre>\n<p>Alle Ausg\u00e4nge AUS-schalten<\/p>\n<pre>i2cset -y 1 <span style=\"color: #008000;\">0x20<\/span> <span style=\"color: #0000ff;\">0xFF<\/span><\/pre>\n<p>Alle unsere digitalen Module haben eine negative Logik. Das liegt an den PCF8574 Bausteinen, die bei Spannung EIN immer high-Signale ausgeben. Damit keine unbeabsichtigten Handlungen der Steuerung ausgef\u00fchrt werden haben wir die Logik gedreht. Im Programm m\u00fcssen die Ein- und Ausg\u00e4nge invertiert werden.<\/p>\n<p>&nbsp;<\/p>\n<h2>Digitale Eing\u00e4nge einlesen<\/h2>\n<p>Um die Eing\u00e4nge der digitalen 8bit Karte einzulesen geben Sie folgenden Befehl ein:<\/p>\n<pre>i2cget -y 1 <span style=\"color: #008000;\">0x38<\/span>\r\n0xFF<\/pre>\n<p>0xFF zeigt Ihnen, dass alle LEDs der Eingabekarte AUS sind.<\/p>\n<p>Schalte ich\u00a0alle\u00a0Schalter meiner Simulationsbaugruppe EIN leuchten die Eing\u00e4nge des Input-Moduls.\u00a0 Frage ich die Karte erneut ab bekomme ich\u00a0oxoo zur\u00fcck.<\/p>\n<pre>i2cget -y 1 <span style=\"color: #008000;\">0x38<\/span>\r\n0x00<\/pre>\n<p>Auch hier bitte die negative Logik der Module beachten.<\/p>\n<p>&nbsp;<\/p>\n<h2>Analoge Ausg\u00e4nge schreiben<\/h2>\n<p>Um einen Analogwert auszugeben m\u00fcssen\u00a0drei Bytes zum I2C-Slave geschrieben werden.<\/p>\n<p>Byte 1\u00a0\u00a0\u00a0 Kanal-Nummer<br \/>\nByte 2\u00a0\u00a0\u00a0 Analogwert\u00a0<span style=\"color: #33cccc;\"><strong>Low Byte<\/strong><\/span><br \/>\nByte 3\u00a0\u00a0\u00a0 Analogwert\u00a0<strong><span style=\"color: #0000ff;\">High Byte<\/span><\/strong><\/p>\n<p>Im mit i2cset\u00a0mehrere Bytes zu senden muss der\u00a0Befehl i2cset mit der\u00a0Option i aufgerufen\u00a0werden.<br \/>\nAndere begriffe sind i2cset multiple bytes\u00a0oder i2cset write I2C Block Data<\/p>\n<table>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><strong>Spannung<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Dezimalwert<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Hexadezimalwert<\/strong><\/td>\n<td style=\"text-align: center;\"><strong><span style=\"color: #0000ff;\">High-Byte<\/span><\/strong><\/td>\n<td style=\"text-align: center;\"><span style=\"color: #33cccc;\"><strong>Low-Byte<\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">0 V<\/td>\n<td style=\"text-align: center;\">0<\/td>\n<td style=\"text-align: center;\">0x0000<\/td>\n<td style=\"text-align: center;\"><span style=\"color: #0000ff;\">0x00<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"color: #33cccc;\">0x00<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">5 V<\/td>\n<td style=\"text-align: center;\">500<\/td>\n<td style=\"text-align: center;\">0x01F4<\/td>\n<td style=\"text-align: center;\"><span style=\"color: #0000ff;\">0x01<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"color: #33cccc;\">0xF4<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">10 V<\/td>\n<td style=\"text-align: center;\">1000<\/td>\n<td style=\"text-align: center;\">0x03E8<\/td>\n<td style=\"text-align: center;\"><span style=\"color: #0000ff;\">0x03<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"color: #33cccc;\">0xE8<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>um z.B. 5 Volt auf\u00a0<strong><span style=\"color: #993366;\">Kanal 0<\/span><\/strong> auszugeben\u00a0muss folgender Befehl eingegeben werden:<\/p>\n<pre>i2cset -y 1 <span style=\"color: #008000;\">0x58<\/span> <span style=\"color: #800080;\">0x00<\/span> <span style=\"color: #0000ff;\"><span style=\"color: #33cccc;\">0xF4<\/span> 0x01<\/span> i<\/pre>\n<p>Dieser Befehl stellt den <span style=\"color: #993366;\"><strong>Kanal\u00a02<\/strong><\/span> auf 10V ein<\/p>\n<pre>i2cset -y 1 <span style=\"color: #008000;\">0x58<\/span> <span style=\"color: #993366;\">0x02<\/span> <span style=\"color: #33cccc;\">0xE8<\/span> <span style=\"color: #0000ff;\">0x03<\/span> i<\/pre>\n<p>und damit wieder zur\u00fcck auf 0V<\/p>\n<pre>i2cset -y 1 <span style=\"color: #008000;\">0x58<\/span> <span style=\"color: #800080;\">0x02<\/span> <span style=\"color: #33cccc;\">0x00<\/span> <span style=\"color: #0000ff;\">0x00<\/span> i<\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mit dem I2C-Repeater k\u00f6nnen 5V I2C-Slaves direkt am Raspberry PI angeschlossen werden. Der abgebildete Testaufbau zeigt in der unteren Reihe neben dem Raspberry PI unser I2C Digital-Input-Modul (8 Bit 5-24V) I2C Digital-Output Modul (8 Bit 5-24V) I2C Analog-Input Modul (5&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/www.horter.de\/blog\/i2c-module-am-raspberry-pi\/\">mehr lesen<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[255],"tags":[73,74,75,72,69,68,67,242,241,239,240,45,70,71,66],"class_list":["post-825","post","type-post","status-publish","format-standard","hentry","category-raspberry-pi","tag-12v-schalten","tag-24v-schalten","tag-5v-schalten","tag-ausgaenge-schalten","tag-digital-input","tag-digitale-signale","tag-eingabe","tag-i2cget","tag-i2cset","tag-i2cset-multiple-bytes","tag-i2cset-write-i2c-block-data","tag-input","tag-input-modul","tag-output-modul","tag-raspberri-pi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>I2C-Module am Raspberry PI - Horter &amp; Kalb Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.horter.de\/blog\/i2c-module-am-raspberry-pi\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"I2C-Module am Raspberry PI - Horter &amp; Kalb Blog\" \/>\n<meta property=\"og:description\" content=\"Mit dem I2C-Repeater k\u00f6nnen 5V I2C-Slaves direkt am Raspberry PI angeschlossen werden. 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