{"id":134,"date":"2012-02-02T16:03:53","date_gmt":"2012-02-02T16:03:53","guid":{"rendered":"http:\/\/www.horter.de\/blog\/?p=134"},"modified":"2023-01-13T20:01:50","modified_gmt":"2023-01-13T20:01:50","slug":"i2c-usb-modem","status":"publish","type":"post","link":"https:\/\/www.horter.de\/blog\/i2c-usb-modem\/","title":{"rendered":"I2C-USB-Modem"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" title=\"I2C-USB Interface\" src=\"https:\/\/www.horter.de\/i2c\/i2c-usb-modem\/i2c_usb.jpg\" alt=\"Bild I2C-USB Modem\" width=\"300\" height=\"223\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-family: arial,helvetica,sans-serif;\">Rechner mit serieller Schnittstelle werden immer seltener. Dieses I2C USB Interface empf\u00e4ngt seine Befehle \u00fcber eine simulierte RS232 Schnittstelle. Dadurch ist es m\u00f6glich mit nahezu allen Entwicklungsumgebungen auf die I2C-Bausteine zuzugreifen. <\/span><\/p>\n<table style=\"width: 100%;\" border=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td width=\"87\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.horter.de\/i2c\/i2c-usb-modem\/ftdi_logo.jpg\" alt=\"\" width=\"100\" height=\"39\" \/><\/td>\n<td>Als USB-Baustein wurde der 2005FT232R USB UART von Future Technology Devices International kurz FTDI verwendet. Der Chip ist zwar etwas teuerer f\u00fcgt sich aber in alle Betriebssysteme sicher und zuverl\u00e4ssig ein.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Treiber f\u00fcr alle m\u00f6glichen Betriebssysteme (von Windows 98 bis Windows Server 2008) finden Sie auf der Treiberseite des Chipherstellers unter: <a href=\"http:\/\/www.ftdichip.com\/Drivers\/D2XX.htm\" target=\"_blank\" rel=\"noopener\">http:\/\/www.ftdichip.com\/Drivers\/D2XX.htm<\/a><\/p>\n<p>Ist der Treiber installiert finden Sie in der Systemsteuerung einen virtuellen COM-Port also eine simulierte RS232-Schnittstelle. \u00dcber diese werden die Steuerbefehle zum I2C-Bus gesendet und die Antworten empfangen.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" title=\"Schema I2C-USB Interface\" src=\"https:\/\/www.horter.de\/i2c\/i2c-usb-modem\/i2um_schema.jpg\" alt=\"Schema I2C-USB-Modem\" width=\"600\" height=\"158\" \/><\/p>\n<p><span style=\"font-family: arial,helvetica,sans-serif;\">Mit einem Jumpern auf der Platine kann die Terminierung der I2C-Signale im Modem erfolgen. Falls Sie bei l\u00e4ngeren Leitungen am Ende terminieren m\u00f6chten, k\u00f6nnen Sie den Jumper entfernen oder die die Terminierung per Steuerbefehl abschalten.<\/span><br \/>\n<span style=\"font-family: arial,helvetica,sans-serif;\">Die drei Leuchtdioden zeigen den aktuellen Signalpegel an. Dies hat sich bei der Softwareerstellung als ungemein n\u00fctzlich erwiesen.<\/span><\/p>\n<p><span style=\"font-family: arial,helvetica,sans-serif;\">Die Spannung f\u00fcr die I2C-Bausteine wird <span style=\"text-decoration: underline;\">absichtlich nicht<\/span> vom USB-Bus abgezapft damit der PC oder die Schnittstellenkarte keinen Schaden nimmt. <\/span><br \/>\n<span style=\"font-family: arial,helvetica,sans-serif;\">Sie ben\u00f6tigen also ein 5V Netzteil das entweder an der Klemmleiste ST2 angeschlossen oder mit einem Hohlstecker (Au\u00dfendurchmesser 5,5 mm Stiftdurchmesser 2 mm Pluspol innen) angesteckt werden kann.<\/span><\/p>\n<p>Weitere Informationen finden Sie auf der <a title=\"Produktseite I2C-USB Interface\" href=\"https:\/\/www.horter.de\/i2c\/i2c-usb-modem\/i2c-usb-modem_1.html\" target=\"_blank\" rel=\"noopener\">Produktseite <\/a> und im <a title=\"Downloadbereich I2C-Produkte\" href=\"https:\/\/www.horter.de\/download\/i2c_1.html\" target=\"_blank\" rel=\"noopener\">Downloadbereich<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Rechner mit serieller Schnittstelle werden immer seltener. Dieses I2C USB Interface empf\u00e4ngt seine Befehle \u00fcber eine simulierte RS232 Schnittstelle. Dadurch ist es m\u00f6glich mit nahezu allen Entwicklungsumgebungen auf die I2C-Bausteine zuzugreifen. Als USB-Baustein wurde der 2005FT232R USB UART von&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/www.horter.de\/blog\/i2c-usb-modem\/\">mehr lesen<\/a><\/p>\n","protected":false},"author":3,"featured_media":28244,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[269,101],"tags":[7,37,33],"class_list":["post-134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-i2c-pc-interface","category-programmierung","tag-i2c","tag-kommunikation","tag-usb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>I2C-USB-Modem - 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-usb-modem\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"I2C-USB-Modem - Horter &amp; Kalb Blog\" \/>\n<meta property=\"og:description\" content=\"&nbsp; Rechner mit serieller Schnittstelle werden immer seltener. Dieses I2C USB Interface empf\u00e4ngt seine Befehle \u00fcber eine simulierte RS232 Schnittstelle. Dadurch ist es m\u00f6glich mit nahezu allen Entwicklungsumgebungen auf die I2C-Bausteine zuzugreifen. 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