{"id":1587,"date":"2021-04-02T12:45:23","date_gmt":"2021-04-02T12:45:23","guid":{"rendered":"https:\/\/imperix.com\/doc\/?p=1587"},"modified":"2026-03-05T08:30:23","modified_gmt":"2026-03-05T08:30:23","slug":"general-purpose-inputs","status":"publish","type":"post","link":"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs","title":{"rendered":"GPI &#8211; General purpose inputs"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right-text counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#Simulink-block\" >Simulink block<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#Signal-specification\" >Signal specification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#Parameters\" >Parameters<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#PLECS-block\" >PLECS block<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#Signal-specification-2\" >Signal specification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#Parameters-2\" >Parameters<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\/#C-functions\" >C++ functions<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>The GPI block (or its C++ routines) is responsible for reading the the logic states of the General Purpose Inputs (GPI) pins. This function allows the controller to read external digital signals efficiently. <\/p>\n\n\n\n<p>Voltage logic levels, location and input counts are summarized in the reference table below, while detailed hardware specifications can be found within the associated product datasheet. <\/p>\n\n\n\n<p>A comprehensive technical comparison of imperix\u2019s programmable controllers is also provided in <a href=\"https:\/\/imperix.com\/doc\/help\/programmable-controller-selection\">PN250<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table class=\"has-fixed-layout\"><thead><tr><th>Param.<\/th><th><strong>B-Box 4<\/strong><\/th><th><strong>B-Box 3<\/strong><\/th><th><strong>B-Box micro<\/strong><\/th><th><strong>B-Board 3 PRO<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Location and count<\/td><td>\u2013 24x VHDCI inputs<\/td><td>\u2013 16x VHDCI inputs<\/td><td>\u2013 8x PCB header inputs<\/td><td>\u2013 16x PCB header inputs<\/td><\/tr><tr><td>Logic level<\/td><td>\u2013 3.3V\/5V<\/td><td>\u2013 3.3V\/5V<\/td><td>\u2013 5V<\/td><td>\u2013 3.3V<\/td><\/tr><tr><td>Shared with<\/td><td>\u2013 FLT<\/td><td>N\/A<\/td><td>N\/A<\/td><td>N\/A<\/td><\/tr><\/tbody><tfoot><tr><td>Product datasheet<\/td><td><a href=\"https:\/\/imperix.com\/wp-content\/uploads\/document\/B-Box_4_Datasheet.pdf\"><strong>B-Box 4<\/strong><\/a><\/td><td><strong><a href=\"https:\/\/imperix.com\/wp-content\/uploads\/document\/B-Box_Datasheet.pdf\">B-Box 3<\/a><\/strong><\/td><td><strong><a href=\"https:\/\/imperix.com\/wp-content\/uploads\/document\/B-Box_micro_Datasheet.pdf\">B-Box micro<\/a><\/strong><\/td><td><strong><a href=\"https:\/\/imperix.com\/wp-content\/uploads\/document\/B-Board_Datasheet.pdf\">B-Board 3 PRO<\/a><\/strong><\/td><\/tr><\/tfoot><\/table><\/figure>\n\n\n\n<div class=\"wp-block-simple-alerts-for-gutenberg-alert-boxes sab-alert sab-alert-warning\" role=\"alert\">For the <a href=\"https:\/\/imperix.com\/products\/power\/programmable-inverter\/\">TPI8032<\/a>, using the <a href=\"https:\/\/imperix.com\/doc\/software\/tpi-gpi-helper-block\">TPI GPI<\/a> helper block is recommended.<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-simulink-block\"><span class=\"ez-toc-section\" id=\"Simulink-block\"><\/span>Simulink block<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-signal-specification\"><span class=\"ez-toc-section\" id=\"Signal-specification\"><\/span>Signal specification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>The output signal returns the value of one GPI pin.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"72\" src=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2024\/02\/image-38.png\" alt=\"\" class=\"wp-image-24492\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-parameters\"><span class=\"ez-toc-section\" id=\"Parameters\"><\/span>Parameters<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Device ID<\/code>&nbsp;selects which B-Box\/B-Board to address when used in a multi-device configuration.<\/li>\n\n\n\n<li><code>GPI pin(s)<\/code> (vectorizable)  a selection of GPI pin(s) to read. It can be a single value or a vector.<\/li>\n\n\n\n<li><code>Show simulation input port<\/code> defines if the simulation input is displayed or not.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"426\" height=\"362\" src=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/GPI-mask-simulink.png\" alt=\"GPI Simulink dialog\" class=\"wp-image-33933\" srcset=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/GPI-mask-simulink.png 426w, https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/GPI-mask-simulink-300x255.png 300w\" sizes=\"auto, (max-width: 426px) 100vw, 426px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-plecs-block\"><span class=\"ez-toc-section\" id=\"PLECS-block\"><\/span>PLECS block<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-signal-specification-1\"><span class=\"ez-toc-section\" id=\"Signal-specification-2\"><\/span>Signal specification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>The output signal returns the value of one GPI pin.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"68\" src=\"https:\/\/cdn.imperix.com\/doc\/wp-content\/uploads\/2021\/04\/blockset-1-3.png\" alt=\"General purpose inputs PLECS block\" class=\"wp-image-2335\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-parameters-1\"><span class=\"ez-toc-section\" id=\"Parameters-2\"><\/span>Parameters<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Device ID<\/code>&nbsp;selects which B-Box\/B-Board to address when used in a multi-device configuration.<\/li>\n\n\n\n<li><code>GPI pin(s)<\/code> (vectorizable) a selection of GPI pin(s) to read. It can be a single value or a vector.<\/li>\n\n\n\n<li><code>Simulation input port<\/code> defines if the target&nbsp;<em>inport&nbsp;<\/em>is displayed or not. This parameter is only used in simulation.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"342\" height=\"316\" src=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/image-270.png\" alt=\"\" class=\"wp-image-41317\" srcset=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/image-270.png 342w, https:\/\/imperix.com\/doc\/wp-content\/uploads\/2021\/04\/image-270-300x277.png 300w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-c-functions\"><span class=\"ez-toc-section\" id=\"C-functions\"><\/span>C++ functions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">Standard functions<\/h4>\n\n\n<style>.kt-accordion-id1587_ff926d-40 .kt-accordion-inner-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:1px;}.kt-accordion-id1587_ff926d-40 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#ffffff;padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px;}.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#ffffff;font-size:16px;line-height:24px;letter-spacing:0px;font-weight:bold;text-transform:none;color:var(--global-palette3, #1A202C);padding-top:12px;padding-right:10px;padding-bottom:8px;padding-left:16px;}.kt-accordion-id1587_ff926d-40:not( 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.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40 .kt-blocks-accordion-header:focus-visible{color:#444444;background:#ffffff;border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion--visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#444444;}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger, body:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger{background:#444444;}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id1587_ff926d-40 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{color:var(--global-palette3, #1A202C);background:var(--global-palette9, #ffffff);border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_ff926d-40:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){.kt-accordion-id1587_ff926d-40 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;}}@media all and (max-width: 1024px){.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;}}@media all and (max-width: 1024px){.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40 .kt-blocks-accordion-header:focus-visible{border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}}@media all and (max-width: 1024px){.kt-accordion-id1587_ff926d-40 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}}@media all and (max-width: 767px){.kt-accordion-id1587_ff926d-40 .kt-accordion-inner-wrap{display:block;}.kt-accordion-id1587_ff926d-40 .kt-accordion-inner-wrap .kt-accordion-pane:not(:first-child){margin-top:1px;}.kt-accordion-id1587_ff926d-40 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;}.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;}.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_ff926d-40 .kt-blocks-accordion-header:focus-visible{border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}.kt-accordion-id1587_ff926d-40 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_ff926d-40 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}}<\/style>\n<div class=\"wp-block-kadence-accordion alignnone\"><div class=\"kt-accordion-wrap kt-accordion-id1587_ff926d-40 kt-accordion-has-3-panes kt-active-pane-0 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-arrow kt-accodion-icon-side-left\" style=\"max-width:none\"><div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"none\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-3 kt-pane1587_202e11-d6\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><code><code>Gpi_ActivateInput<\/code> <\/code><strong>\u2014 Activate the GPI pin<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\"><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"C++\" data-shcb-language-slug=\"cpp\"><span><code class=\"hljs language-cpp\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">Gpi_ActivateInput<\/span><span class=\"hljs-params\">(<span class=\"hljs-keyword\">unsigned<\/span> <span class=\"hljs-keyword\">int<\/span> bit, <span class=\"hljs-keyword\">unsigned<\/span> <span class=\"hljs-keyword\">int<\/span> device=<span class=\"hljs-number\">0<\/span>)<\/span><\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C++<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cpp<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Activates the GPI pin on B-Box 4 devices. Since these pins are shared with FLT, this function determines the active input type.<\/p>\n\n\n\n<p>Can only be called in UserInit().<\/p>\n\n\n\n<p><strong>Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>bit<\/code>: the GPI pin number<\/li>\n\n\n\n<li><code>device<\/code>: the ID of the addressed device (optional, used in multi-device configuration only)<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-2 kt-pane1587_ffa138-dd\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><code><code>Gpi_GetBit<\/code> <\/code><strong>\u2014 Get the GPI pin value<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\"><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"C++\" data-shcb-language-slug=\"cpp\"><span><code class=\"hljs language-cpp\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-title\">Gpi_GetBit<\/span><span class=\"hljs-params\">(<span class=\"hljs-keyword\">unsigned<\/span> <span class=\"hljs-keyword\">int<\/span> bit, <span class=\"hljs-keyword\">unsigned<\/span> <span class=\"hljs-keyword\">int<\/span> device=<span class=\"hljs-number\">0<\/span>)<\/span><\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C++<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cpp<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Returns the value (0 or 1) of a given GPI pin.<\/p>\n\n\n\n<p>Can be called in the interrupt routine.<\/p>\n\n\n\n<p><strong>Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>bit<\/code>: the GPI pin number<\/li>\n\n\n\n<li><code>device<\/code>: the ID of the addressed device (optional, used in multi-device configuration only)<\/li>\n<\/ul>\n\n\n\n<p><strong>Return value<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The value of the GPI pin<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Legacy functions<\/h4>\n\n\n<style>.kt-accordion-id1587_32014f-a9 .kt-accordion-inner-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:1px;}.kt-accordion-id1587_32014f-a9 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#ffffff;padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px;}.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#ffffff;font-size:16px;line-height:24px;letter-spacing:0px;font-weight:bold;text-transform:none;color:var(--global-palette3, #1A202C);padding-top:12px;padding-right:10px;padding-bottom:8px;padding-left:16px;}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:before{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9 .kt-blocks-accordion-header:focus-visible{color:#444444;background:#ffffff;border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion--visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#444444;}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger, body:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger{background:#444444;}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#ffffff;}.kt-accordion-id1587_32014f-a9 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{color:var(--global-palette3, #1A202C);background:var(--global-palette9, #ffffff);border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger{background:var(--global-palette3, #1A202C);}.kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1587_32014f-a9:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){.kt-accordion-id1587_32014f-a9 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;}}@media all and (max-width: 1024px){.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;}}@media all and (max-width: 1024px){.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9 .kt-blocks-accordion-header:focus-visible{border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}}@media all and (max-width: 1024px){.kt-accordion-id1587_32014f-a9 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}}@media all and (max-width: 767px){.kt-accordion-id1587_32014f-a9 .kt-accordion-inner-wrap{display:block;}.kt-accordion-id1587_32014f-a9 .kt-accordion-inner-wrap .kt-accordion-pane:not(:first-child){margin-top:1px;}.kt-accordion-id1587_32014f-a9 .kt-accordion-panel-inner{border-top:2px solid transparent;border-right:2px solid transparent;border-bottom:2px solid transparent;border-left:2px solid transparent;}.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:2px solid #f2f2f2;border-right:2px solid #f2f2f2;border-bottom:2px solid #f2f2f2;border-left:2px solid #f2f2f2;}.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1587_32014f-a9 .kt-blocks-accordion-header:focus-visible{border-top:2px solid #eeeeee;border-right:2px solid #eeeeee;border-bottom:2px solid #eeeeee;border-left:2px solid #eeeeee;}.kt-accordion-id1587_32014f-a9 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1587_32014f-a9 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:2px solid var(--global-palette6, #718096);border-right:2px solid var(--global-palette6, #718096);border-bottom:2px solid var(--global-palette6, #718096);border-left:2px solid var(--global-palette6, #718096);}}<\/style>\n<div class=\"wp-block-kadence-accordion alignnone\"><div class=\"kt-accordion-wrap kt-accordion-id1587_32014f-a9 kt-accordion-has-3-panes kt-active-pane-0 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-arrow kt-accodion-icon-side-left\" style=\"max-width:none\"><div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"none\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-3 kt-pane1587_6927f4-2e\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><code><code>Gpi_Get<\/code> <\/code><strong>\u2014 Get the whole 16 GPI values<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\"><pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"C++\" data-shcb-language-slug=\"cpp\"><span><code class=\"hljs language-cpp\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-title\">Gpi_Get<\/span><span class=\"hljs-params\">(<span class=\"hljs-keyword\">unsigned<\/span> <span class=\"hljs-keyword\">int<\/span> device=<span class=\"hljs-number\">0<\/span>)<\/span><\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">C++<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">cpp<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Returns the value of all GPI pins in the form of a 16-bit value.<\/p>\n\n\n\n<p>Can be called in the interrupt routine.<\/p>\n\n\n\n<p><strong>Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>device<\/code>: the ID of the addressed device (optional, used in multi-device configuration only)<\/li>\n<\/ul>\n\n\n\n<p><strong>Return value<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The value of all GPI pins<\/li>\n<\/ul>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The GPI block (or its C++ routines) is responsible for reading the the logic states of the General Purpose Inputs (GPI) pins. This function allows&#8230;<\/p>\n","protected":false},"author":4,"featured_media":33315,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[16],"tags":[],"software-environments":[105,103,104],"provided-results":[],"related-products":[50,31,32,92,166,51,110],"guidedreadings":[],"tutorials":[],"user-manuals":[],"coauthors":[70,175],"class_list":["post-1587","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","software-environments-c-plus-plus","software-environments-matlab","software-environments-plecs","related-products-acg-sdk","related-products-b-board-pro","related-products-b-box-rcp","related-products-b-box-micro","related-products-b-box-rcp-3-0","related-products-cpp-sdk","related-products-tpi"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GPI - General purpose inputs - Simulink, PLECS and C++ documentation<\/title>\n<meta name=\"description\" content=\"This block returns the logical values of the General Purpose inputs on the B-Box RCP and B-Board PRO power electronics controllers.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GPI - General purpose inputs - Simulink, PLECS and C++ documentation\" \/>\n<meta property=\"og:description\" content=\"This block returns the logical values of the General Purpose inputs on the B-Box RCP and B-Board PRO power electronics controllers.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/imperix.com\/doc\/software\/general-purpose-inputs\" \/>\n<meta property=\"og:site_name\" content=\"imperix\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-02T12:45:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-05T08:30:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/imperix.com\/doc\/wp-content\/uploads\/2025\/05\/software.png\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"334\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Beno\u00eet Steinmann, Rafael Basso\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Beno\u00eet Steinmann, Rafael Basso\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/imperix.com\\\/doc\\\/software\\\/general-purpose-inputs#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/imperix.com\\\/doc\\\/software\\\/general-purpose-inputs\"},\"author\":{\"name\":\"Beno\u00eet Steinmann\",\"@id\":\"https:\\\/\\\/imperix.com\\\/doc\\\/#\\\/schema\\\/person\\\/a69a3bda75b05d0923cc76d7268cc94f\"},\"headline\":\"GPI &#8211; 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