{"id":1807,"date":"2018-02-18T16:53:07","date_gmt":"2018-02-18T16:53:07","guid":{"rendered":"http:\/\/www.horter.de\/blog\/?p=1807"},"modified":"2023-07-24T16:11:46","modified_gmt":"2023-07-24T16:11:46","slug":"i2c-mcp3424-analog-in-18bit-modul-mit-python-und-tkinter","status":"publish","type":"post","link":"https:\/\/www.horter.de\/blog\/i2c-mcp3424-analog-in-18bit-modul-mit-python-und-tkinter\/","title":{"rendered":"I2C-MCP3424 Analog-In-18Bit-Modul mit Python und TkInter"},"content":{"rendered":"<h3>Analogwerte\u00a0vom I2AE18-Modul\u00a0einlesen<\/h3>\n<p>Das Programmbeispiel liest auf Tastendruck die Analogwerte von der 18-Bit Analog-Eingangskarte ein,\u00a0schreibt den Wert in ein Label und gibt ihn in einer Balkengrafik aus.<\/p>\n<div id=\"attachment_1809\" style=\"width: 118px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.horter.de\/blog\/i2c-mcp3424-analog-in-18bit-modul-mit-python-und-tkinter\/pythontkinter_analogin-18\/\" rel=\"attachment wp-att-1809\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1809\" class=\"wp-image-1809 size-full\" src=\"https:\/\/www.horter.de\/blog\/wp-content\/uploads\/2018\/02\/PythonTkInter_AnalogIn-18.jpg\" alt=\"\" width=\"108\" height=\"216\" \/><\/a><p id=\"caption-attachment-1809\" class=\"wp-caption-text\">I2C-Analog-Input Modul mit MCP3424<\/p><\/div>\n<h3>Programmcode<\/h3>\n<pre style=\"background: rgba(238,238,238,0.92); color: #000;\"><span style=\"color: #06f; font-style: italic;\">#!\/usr\/bin\/python<\/span>\r\n<span style=\"color: #00f;\">import<\/span> ast\r\n<span style=\"color: #00f;\">import<\/span> smbus\r\nbus <span style=\"color: #00f;\">=<\/span> smbus.SMBus(<span style=\"color: #06f;\">1<\/span>)                                    <span style=\"color: #06f; font-style: italic;\">#Bus definieren<\/span>\r\n\r\n<span style=\"color: #00f;\">from<\/span> time <span style=\"color: #00f;\">import<\/span> sleep\r\n<span style=\"color: #00f;\">import<\/span> tkinter\r\n<span style=\"color: #00f;\">from<\/span> tkinter <span style=\"color: #00f;\">import<\/span> <span style=\"color: #00f;\">*<\/span>\r\n<span style=\"color: #00f;\">import<\/span> tkinter.ttk <span style=\"color: #00f;\">as<\/span> ttk\r\n\r\n\r\nmainWin <span style=\"color: #00f;\">=<\/span> Tk()\r\nmainWin.title(<span style=\"color: #093;\">'Analoge Eingabe'<\/span>)\r\n\r\nstBy <span style=\"color: #00f;\">=<\/span> <span style=\"color: #06f;\">0<\/span>\r\n\r\naddr <span style=\"color: #00f;\">=<\/span> <span style=\"color: #06f;\">0x68<\/span>\r\n\r\n<span style=\"font-weight: bold;\">def<\/span> <span style=\"color: #ff8000;\">wert<\/span>():\r\n    <span style=\"font-weight: bold;\">def<\/span> <span style=\"color: #ff8000;\">read<\/span>():\r\n        stBy <span style=\"color: #00f;\">=<\/span> <span style=\"color: #06f;\">0<\/span>\r\n        adrOp_v <span style=\"color: #00f;\">=<\/span> var1.get()\r\n        auflOp_v <span style=\"color: #00f;\">=<\/span> var2.get()\r\n        versOp_v <span style=\"color: #00f;\">=<\/span> var3.get()\r\n\r\n        <span style=\"color: #00f;\">if<\/span> versOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"1\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">0<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> versOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"2\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">1<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> versOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"4\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">2<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> versOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"8\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">3<\/span>\r\n\r\n        <span style=\"color: #00f;\">if<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"12\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">0<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"14\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">4<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"16\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">8<\/span>\r\n        <span style=\"color: #00f;\">elif<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"18\"<\/span>:\r\n            stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">12<\/span>\r\n\r\n        stBy <span style=\"color: #00f;\">=<\/span> stBy<span style=\"color: #00f;\">+<\/span><span style=\"color: #06f;\">128<\/span>\r\n        <span style=\"color: #00f;\">print<\/span>(stBy)\r\n        \r\n        addr <span style=\"color: #00f;\">=<\/span> ast.literal_eval(adrOp_v)\r\n        \r\n        bus.write_byte(addr,stBy)\r\n        sleep(<span style=\"color: #06f;\">0.05<\/span>)\r\n        \r\n        <span style=\"color: #00f;\">if<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"12\"<\/span> <span style=\"color: #00f;\">or<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"14\"<\/span> <span style=\"color: #00f;\">or<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"16\"<\/span>:\r\n            var <span style=\"color: #00f;\">=<\/span> bus.read_i2c_block_data(addr,<span style=\"color: #06f;\">0<\/span>,<span style=\"color: #06f;\">3<\/span>)\r\n            <span style=\"color: #00f;\">print<\/span>(var)\r\n            var <span style=\"color: #00f;\">=<\/span> var[<span style=\"color: #06f;\">2<\/span>]<span style=\"color: #00f;\">*<\/span><span style=\"color: #06f;\">256<\/span><span style=\"color: #00f;\">+<\/span>var[<span style=\"color: #06f;\">1<\/span>]\r\n        <span style=\"color: #00f;\">if<\/span> auflOp_v <span style=\"color: #00f;\">==<\/span> <span style=\"color: #093;\">\"18\"<\/span>:\r\n            var <span style=\"color: #00f;\">=<\/span> bus.read_i2c_block_data(addr,<span style=\"color: #06f;\">0<\/span>,<span style=\"color: #06f;\">4<\/span>)\r\n            var <span style=\"color: #00f;\">=<\/span> bus.read_byte_data(addr,<span style=\"color: #06f;\">4<\/span>)\r\n            <span style=\"color: #00f;\">print<\/span>(var)\r\n            var <span style=\"color: #00f;\">=<\/span> var[<span style=\"color: #06f;\">3<\/span>]<span style=\"color: #00f;\">*<\/span><span style=\"color: #06f;\">65536<\/span><span style=\"color: #00f;\">+<\/span>var[<span style=\"color: #06f;\">2<\/span>]<span style=\"color: #06f;\">*256<\/span><span style=\"color: #00f;\">+<\/span>var[<span style=\"color: #06f;\">1<\/span>]\r\n        \r\n        <span style=\"color: #00f;\">print<\/span>(var)\r\n        \r\n    <span style=\"color: #06f; font-style: italic;\">#val = var[2]*256+var[1]                         #Berechnung der korrekten Zahlenwerte aus dem Array<\/span>\r\n        <span style=\"color: #06f; font-style: italic;\">#label.config(text=str(val))                     #Umwandeln der Integer Zahl in eine String Ziffer + Ausgabe in Label<\/span>\r\n        <span style=\"color: #06f; font-style: italic;\">#label.after(20, read)                           #read() wird nach 20 ms erneut ausgef\u00fchrt<\/span>\r\n        <span style=\"color: #06f; font-style: italic;\">#pb1.config(value=var[1])                            #Value der Progressbar wird angepass<\/span>\r\n    read()\r\n\r\n<span style=\"color: #06f; font-style: italic;\">#dropdown AdrOp<\/span>\r\nvar1 <span style=\"color: #00f;\">=<\/span> StringVar(mainWin)\r\nvar1.set(<span style=\"color: #093;\">\"104\"<\/span>) <span style=\"color: #06f; font-style: italic;\"># initial value<\/span>\r\n\r\nadrOp <span style=\"color: #00f;\">=<\/span> OptionMenu(mainWin, var1, <span style=\"color: #093;\">\"104\"<\/span>, <span style=\"color: #093;\">\"105\"<\/span>, <span style=\"color: #093;\">\"106\"<\/span>, <span style=\"color: #093;\">\"107\"<\/span>, <span style=\"color: #093;\">\"108\"<\/span>, <span style=\"color: #093;\">\"109\"<\/span>, <span style=\"color: #093;\">\"110\"<\/span>, <span style=\"color: #093;\">\"111\"<\/span>)\r\nadrOp.pack()\r\n    \r\n<span style=\"color: #06f; font-style: italic;\">#dropdown AdrOp<\/span>\r\nvar2 <span style=\"color: #00f;\">=<\/span> StringVar(mainWin)\r\nvar2.set(<span style=\"color: #093;\">\"12\"<\/span>) <span style=\"color: #06f; font-style: italic;\"># initial value<\/span>\r\n\r\nauflOp <span style=\"color: #00f;\">=<\/span> OptionMenu(mainWin, var2, <span style=\"color: #093;\">\"12\"<\/span>, <span style=\"color: #093;\">\"14\"<\/span>, <span style=\"color: #093;\">\"16\"<\/span>, <span style=\"color: #093;\">\"18\"<\/span>)\r\nauflOp.pack()\r\n    \r\n<span style=\"color: #06f; font-style: italic;\">#dropdown AdrOp<\/span>\r\nvar3 <span style=\"color: #00f;\">=<\/span> StringVar(mainWin)\r\nvar3.set(<span style=\"color: #093;\">\"1\"<\/span>) <span style=\"color: #06f; font-style: italic;\"># initial value<\/span>\r\n\r\nversOp <span style=\"color: #00f;\">=<\/span> OptionMenu(mainWin, var3, <span style=\"color: #093;\">\"1\"<\/span>, <span style=\"color: #093;\">\"2\"<\/span>, <span style=\"color: #093;\">\"4\"<\/span>, <span style=\"color: #093;\">\"8\"<\/span>)\r\nversOp.pack()\r\n    \r\n<span style=\"color: #06f; font-style: italic;\">#Progressbar f\u00fcr Analoge Darstellung <\/span>\r\npb1 <span style=\"color: #00f;\">=<\/span> ttk.Progressbar(mainWin, <span style=\"font-style: italic;\">orient<\/span><span style=\"color: #00f;\">=<\/span><span style=\"color: #093;\">'horizontal'<\/span>, <span style=\"font-style: italic;\">maximum<\/span><span style=\"color: #00f;\">=<\/span><span style=\"color: #06f;\">255<\/span>, <span style=\"font-style: italic;\">length<\/span><span style=\"color: #00f;\">=<\/span><span style=\"color: #06f;\">100<\/span>, <span style=\"font-style: italic;\">mode<\/span><span style=\"color: #00f;\">=<\/span><span style=\"color: #093;\">'determinate'<\/span>)\r\npb1.pack()\r\n\r\nbutton <span style=\"color: #00f;\">=<\/span> ttk.Button(mainWin, <span style=\"font-style: italic;\">command<\/span><span style=\"color: #00f;\">=<\/span>wert)\r\nbutton.pack()\r\n\r\nmainWin.mainloop()\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Analogwerte\u00a0vom I2AE18-Modul\u00a0einlesen Das Programmbeispiel liest auf Tastendruck die Analogwerte von der 18-Bit Analog-Eingangskarte ein,\u00a0schreibt den Wert in ein Label und gibt ihn in einer Balkengrafik aus. Programmcode #!\/usr\/bin\/python import ast import smbus bus = smbus.SMBus(1) #Bus definieren from time import&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/www.horter.de\/blog\/i2c-mcp3424-analog-in-18bit-modul-mit-python-und-tkinter\/\">mehr lesen<\/a><\/p>\n","protected":false},"author":3,"featured_media":1809,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[254],"tags":[237,81,232,233,236,130,234,114,231,166,235,161,85,119],"class_list":["post-1807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-19-bit","tag-analog","tag-analogeingabe","tag-analoger-messwert","tag-druck-messen","tag-drucksensor","tag-einlesen","tag-i2c-bus","tag-mcp3424","tag-messen","tag-messwert","tag-python","tag-raspberry-pi","tag-sensor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>I2C-MCP3424 Analog-In-18Bit-Modul mit Python und TkInter - 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-mcp3424-analog-in-18bit-modul-mit-python-und-tkinter\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"I2C-MCP3424 Analog-In-18Bit-Modul mit Python und TkInter - Horter &amp; Kalb Blog\" \/>\n<meta property=\"og:description\" content=\"Analogwerte\u00a0vom I2AE18-Modul\u00a0einlesen Das Programmbeispiel liest auf Tastendruck die Analogwerte von der 18-Bit Analog-Eingangskarte ein,\u00a0schreibt den Wert in ein Label und gibt ihn in einer Balkengrafik aus. 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