{"id":1720,"date":"2017-12-30T15:51:26","date_gmt":"2017-12-30T15:51:26","guid":{"rendered":"http:\/\/www.horter.de\/blog\/?p=1720"},"modified":"2023-01-13T15:30:35","modified_gmt":"2023-01-13T15:30:35","slug":"i2c-analog-input-8-kanaele-0-10v-10-bit-2","status":"publish","type":"post","link":"https:\/\/www.horter.de\/blog\/i2c-analog-input-8-kanaele-0-10v-10-bit-2\/","title":{"rendered":"I2C-Analog Input 8 Kan\u00e4le 0-10V 10 Bit"},"content":{"rendered":"<p>Unsere analoge Eingangskarte haben wir weiterentwickelt.<br \/>\n<span style=\"line-height: 1.5;\">Folgende Verbesserungen haben wir in das neue Design einflie\u00dfen lassen<\/span><\/p>\n<ul>\n<li>Acht Eingangskan\u00e4le je 10 Bit<\/li>\n<li>Abtastrate 250 Hz<\/li>\n<li>Busanschluss-Stecker<\/li>\n<\/ul>\n<h3>Hardware<\/h3>\n<p><a href=\"https:\/\/www.horter.de\/blog\/i2c-analogin-8fach_front_fest\/\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1797 size-full\" src=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2018\/01\/I2C-AnalogIN-8fach_Front_fest.jpg\" alt=\"\" width=\"432\" height=\"633\" srcset=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2018\/01\/I2C-AnalogIN-8fach_Front_fest.jpg 432w, https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2018\/01\/I2C-AnalogIN-8fach_Front_fest-205x300.jpg 205w\" sizes=\"auto, (max-width: 432px) 100vw, 432px\" \/><\/a><\/p>\n<p>Gesteuert werden alle Vorg\u00e4nge auf der Karte von einem Mikrokontroller (PIC 18F13K22). Dieser stellt die Verbindung zwischen dem I2C-Bus und den A\/D-Wandlern her. Er sorgt daf\u00fcr dass die Daten in den Registern mit einer Frequenz von <strong>250 Hz<\/strong> aktualisiert werden..<br \/>\nDer minimale Wert eines Registers liegt bei 0x0000 (dec. 0) der Maximale 0x03FF (dec. 1023). Die A\/D-Wandler messen gegen eine interne Referenzspannung von 2,048 Volt. Somit entspricht der maximale Wert einer messbaren Spannung von 2,048 Volt am Eingang. Mit entsprechenden Eingangswiderst\u00e4nden l\u00e4sst sich der Messbereich der Karte erweitern.<\/p>\n<h3>Downloads<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.horter-shop.de\/images\/pdf_icon_mini.png\" alt=\"\" width=\"45\" height=\"45\" \/><strong><a href=\"https:\/\/www.horter.de\/doku\/i2c-hs-analog-in_8fach-10Bit_db.pdf\" target=\"_blank\" rel=\"noopener\">Datenblatt<\/a><\/strong>\u00a0 \u00a0<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.horter-shop.de\/images\/pdf_icon_mini.png\" alt=\"\" width=\"45\" height=\"45\" \/><strong><a href=\"https:\/\/www.horter.de\/doku\/i2c-hs-analog-in_8fach-10Bit_sp.pdf\" target=\"_blank\" rel=\"noopener\">Schaltplan<\/a><\/strong><\/p>\n<p>&nbsp;<\/p>\n<h3>Allgemeines<\/h3>\n<p>Die neue Analog-In Karte verf\u00fcgt \u00fcber insgesamt <strong>8 AD Wandler<\/strong> mit einer Aufl\u00f6sung von 10 Bit. Die Analog-In Karte ist komplett Register gesteuert. Alle Daten werden in lese- und schreibbaren Registern gespeichert.<\/p>\n<p>Au\u00dferdem hat die Karte zwei Stecker f\u00fcr den Busverbinder bekmmen.<\/p>\n<h3>I2C-Adresse<\/h3>\n<p>Wie bei allen Karten kann man die I2C-Adresse innerhalb eines gewissen Rahmens w\u00e4hlen.<\/p>\n<p>I2C-Adressen sind immer als 7+1 Bit Adressen aufgebaut. Das letzte Bit entscheidet dar\u00fcber ob der Master lesen oder schreiben will.<br \/>\nAuf gerade I2C-Adressen wird immer geschrieben \u2013 von ungeraden Adressen wird immer gelesen.<\/p>\n<p>Beim Raspberry muss die 7-Bit Adresse angegeben werden. Die Umschaltung des letzten Adress-Bits wird vom PI selbst gesteuert.<\/p>\n<table width=\"422\">\n<tbody>\n<tr>\n<td width=\"102\"><strong>Analog IN<\/strong><\/td>\n<td width=\"80\">8-Bit dez<\/td>\n<td width=\"80\">8-Bit hex<\/td>\n<td width=\"80\">7-Bit dez<\/td>\n<td width=\"80\">7-Bit hex<\/td>\n<\/tr>\n<tr>\n<td>OFF OFF OFF OFF<\/td>\n<td>16<\/td>\n<td>10<\/td>\n<td>8<\/td>\n<td>08<\/td>\n<\/tr>\n<tr>\n<td>OFF OFF OFF\u00a0 ON<\/td>\n<td>18<\/td>\n<td>12<\/td>\n<td>9<\/td>\n<td>09<\/td>\n<\/tr>\n<tr>\n<td>OFF OFF\u00a0 ON\u00a0 OFF<\/td>\n<td>20<\/td>\n<td>14<\/td>\n<td>10<\/td>\n<td>0A<\/td>\n<\/tr>\n<tr>\n<td>OFF OFF \u00a0ON\u00a0 \u00a0 ON<\/td>\n<td>22<\/td>\n<td>16<\/td>\n<td>11<\/td>\n<td>0B<\/td>\n<\/tr>\n<tr>\n<td>OFF \u00a0ON\u00a0 OFF OFF<\/td>\n<td>24<\/td>\n<td>18<\/td>\n<td>12<\/td>\n<td>0C<\/td>\n<\/tr>\n<tr>\n<td>OFF\u00a0 ON\u00a0 OFF\u00a0 ON<\/td>\n<td>26<\/td>\n<td>1A<\/td>\n<td>13<\/td>\n<td>0D<\/td>\n<\/tr>\n<tr>\n<td>OFF\u00a0 ON\u00a0 ON\u00a0 OFF<\/td>\n<td>28<\/td>\n<td>1C<\/td>\n<td>14<\/td>\n<td>0E<\/td>\n<\/tr>\n<tr>\n<td>OFF\u00a0 ON\u00a0 ON\u00a0\u00a0ON<\/td>\n<td>30<\/td>\n<td>1E<\/td>\n<td>15<\/td>\n<td>0F<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 OFF OFF OFF<\/td>\n<td>48<\/td>\n<td>30<\/td>\n<td>24<\/td>\n<td>18<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 OFF OFF\u00a0 ON<\/td>\n<td>50<\/td>\n<td>32<\/td>\n<td>25<\/td>\n<td>19<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 OFF \u00a0ON\u00a0 OFF<\/td>\n<td>52<\/td>\n<td>34<\/td>\n<td>26<\/td>\n<td>1A<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 OFF\u00a0 ON\u00a0 ON<\/td>\n<td>54<\/td>\n<td>36<\/td>\n<td>27<\/td>\n<td>1B<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 ON \u00a0OFF OFF<\/td>\n<td>56<\/td>\n<td>38<\/td>\n<td>28<\/td>\n<td>1C<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 ON \u00a0OFF\u00a0 ON<\/td>\n<td>58<\/td>\n<td>3A<\/td>\n<td>29<\/td>\n<td>1D<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 ON\u00a0 ON\u00a0OFF<\/td>\n<td>60<\/td>\n<td>3C<\/td>\n<td><strong>30<\/strong><\/td>\n<td>1E<\/td>\n<\/tr>\n<tr>\n<td>\u00a0ON\u00a0 ON\u00a0 ON\u00a0 ON<\/td>\n<td>62<\/td>\n<td>3E<\/td>\n<td><strong>31<\/strong><\/td>\n<td>1F<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><\/h3>\n<h3>Daten\u00fcbertragung<\/h3>\n<p>Eigentlich ist die Karte zum Messen da und zum Auslesen der gemessenen Spannungen. Es gibt aber einen Wert den man schreiben kann, den Register-Zeiger. Mit ihm ist es m\u00f6glich einen bestimmten Kanal auszulesen. er ist 1 Byte lang.<\/p>\n<p>Nach Spannung ein ist das Register auf Null gestellt. Somit werden die Analogwerte ab Kanal 0 gelesen.<\/p>\n<p>Bei der Daten\u00fcbertragung k\u00f6nnen beliebig viele Bytes gelesen werden.<br \/>\n\u2022die Anzahl der Bytes muss immer ungerade sein (1, 3, 5 usw.)<br \/>\n\u2022alle Registerwerte werden mit dem LSB voran gelesen<br \/>\n\u2022alle \u00fcberfl\u00fcssigen Leseoperationen werden ignoriert.<\/p>\n<p>Im einfachsten Fall liest man immer <strong>17 Bytes<\/strong> von der Analogeingabekarte und bekommt so alle Werte wie folgt in einem Datenarray abgelegt<\/p>\n<p>Byte 1 Zeiger<br \/>\nByte 2 Analogwert 1 Low Byte<br \/>\nByte 3 Analogwert 1 High Byte<br \/>\nByte 4 Analogwert 2 Low Byte<br \/>\nByte 5 Analogwert 2 High Byte<br \/>\nByte 6 Analogwert 3 Low Byte<br \/>\nByte 7 Analogwert 3 High Byte<br \/>\nByte 8 Analogwert 4 Low Byte<br \/>\nByte 9 Analogwert 4 High Byte<br \/>\nByte 10 Analogwert 5 Low Byte<br \/>\nByte 11 Analogwert 5 High Byte<br \/>\nByte 12 Analogwert 6 Low Byte<br \/>\nByte 13 Analogwert 6 High Byte<br \/>\nByte 14 Analogwert 7 Low Byte<br \/>\nByte 15 Analogwert 7 High Byte<br \/>\nByte 16 Analogwert 8 Low Byte<br \/>\nByte 17 Analogwert 8 High Byte<\/p>\n<p>&nbsp;<\/p>\n<h2>Beispiel f\u00fcr I2C-RS232-Modem 2 oder I2C-USB-Modem<\/h2>\n<p>Im Beispiel wird mit dem Befehl 51 das Auslesen der 17 Bytes von der Analogkarte angest0\u00dfen. Die empfangenen Daten werden in das Array D(x) abgelegt.<\/p>\n<p>Aus dem Byte D(2) und D(3) wird dann der erste Analogwert berechnet indem man das High-Byte mit 255 multipliziert und das Low-Byte einfach hinzuaddiert. Eine Multiplikation mit 255 entspricht ein links schieben um 8 Bitstellen.<\/p>\n<pre class=\"vbnet\"><span style=\"font-family: courier new,courier,monospace;\"><span style=\"color: #0000ff;\">Option <\/span>Explicit\r\n'Globale Variablen anlegen, die in der Funktion \"Modem_Antwort\"\r\n'beschrieben werden\r\n\r\n<span style=\"color: #0000ff;\">Dim <\/span>FB           <span style=\"color: #008000;\">'Frame Befehl<\/span>\r\n<span style=\"color: #0000ff;\">Dim<\/span> FA           <span style=\"color: #008000;\">'Frame Anzahl<\/span>\r\n<span style=\"color: #0000ff;\">Dim<\/span> FE           <span style=\"color: #008000;\">'Frame Ende<\/span>\r\n<span style=\"color: #0000ff;\">Dim<\/span> D(1 <span style=\"color: #0000ff;\">To<\/span> 128)  <span style=\"color: #008000;\">'Daten<\/span><\/span><\/pre>\n<pre class=\"vbnet\"><span style=\"font-family: courier new,courier,monospace;\"><span style=\"color: #0000ff;\">Private Sub<\/span> Command_LESEN_Click()\r\n<span style=\"color: #008000;\">'Der Befehl I2C-Data 33 hex = 51 dez.\r\n'liest oder schreibt bis zu 128 Bytes vom I2C-Slave<\/span>\r\n<span style=\"color: #0000ff;\">Dim<\/span> Adr\r\nAdr = Combo_AIN_Adresse   <span style=\"color: #008000;\">'Adresse aus Cobo-Box<\/span>\r\n\r\nSENDBYTE (51)       <span style=\"color: #008000;\">'Befehl 51 = I2C-DATA<\/span>\r\nSENDBYTE (3)        <span style=\"color: #008000;\">'Frame Anzahl = 3<\/span>\r\nSENDBYTE (Adr + 1)  <span style=\"color: #008000;\">'Bus-Adresse des I2C-ADC zum Lesen<\/span>\r\nSENDBYTE (0)        <span style=\"color: #008000;\">'Adresse MSB<\/span>\r\nSENDBYTE (17)       <span style=\"color: #008000;\">'17 Byte lesen<\/span>\r\nSENDBYTE (4)        <span style=\"color: #008000;\">'Endekennung<\/span>\r\n\r\n<span style=\"color: #0000ff;\">If<\/span> Modem_Antwort = <span style=\"color: #0000ff;\">True Then\r\n\u00a0\u00a0\u00a0      <span style=\"color: #008000;\">'Analogwerte eintragen<\/span><\/span>\r\n\u00a0\u00a0\u00a0 TextBox_AIN1.Text = D(3) * 256 + D(2)\r\n\u00a0\u00a0\u00a0 TextBox_AIN2.Text = D(5) * 256 + D(4)\r\n\u00a0\u00a0\u00a0 TextBox_AIN3.Text = D(7) * 256 + D(6)\r\n\u00a0\u00a0\u00a0 TextBox_AIN4.Text = D(9) * 256 + D(8)\r\n\u00a0\u00a0\u00a0 TextBox_AIN5.Text = D(11) * 256 + D(10)\r\n\u00a0\u00a0\u00a0 TextBox_AIN6.Text = D(13) * 256 + D(12)\r\n\u00a0\u00a0\u00a0 TextBox_AIN7.Text = D(15) * 256 + D(14)\r\n\u00a0\u00a0\u00a0 TextBox_AIN8.Text = D(17) * 256 + D(16)\r\n<span style=\"color: #0000ff;\">Else<\/span>\r\n    <span style=\"color: #0000ff;\">MsgBox<\/span> (\"Fehler bei I2C-AIN\")\r\n<span style=\"color: #0000ff;\">End If\r\n\r\nEnd Sub<\/span><\/span><\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unsere analoge Eingangskarte haben wir weiterentwickelt. Folgende Verbesserungen haben wir in das neue Design einflie\u00dfen lassen Acht Eingangskan\u00e4le je 10 Bit Abtastrate 250 Hz Busanschluss-Stecker Hardware Gesteuert werden alle Vorg\u00e4nge auf der Karte von einem Mikrokontroller (PIC 18F13K22). Dieser stellt&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/www.horter.de\/blog\/i2c-analog-input-8-kanaele-0-10v-10-bit-2\/\">mehr lesen<\/a><\/p>\n","protected":false},"author":3,"featured_media":1796,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[82,165,83,144,7,132,114,85],"class_list":["post-1720","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-i2c-baugruppen","tag-10-bit","tag-analog-eingang","tag-analogwert","tag-analogwerte-lesen","tag-i2c","tag-i2c-analogkarte","tag-i2c-bus","tag-raspberry-pi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>I2C-Analog Input 8 Kan\u00e4le 0-10V 10 Bit - 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-analog-input-8-kanaele-0-10v-10-bit-2\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"I2C-Analog Input 8 Kan\u00e4le 0-10V 10 Bit - Horter &amp; Kalb Blog\" \/>\n<meta property=\"og:description\" content=\"Unsere analoge Eingangskarte haben wir weiterentwickelt. Folgende Verbesserungen haben wir in das neue Design einflie\u00dfen lassen Acht Eingangskan\u00e4le je 10 Bit Abtastrate 250 Hz Busanschluss-Stecker Hardware Gesteuert werden alle Vorg\u00e4nge auf der Karte von einem Mikrokontroller (PIC 18F13K22). 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