{"id":183829,"date":"2025-01-17T06:34:28","date_gmt":"2025-01-17T06:34:28","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=183829"},"modified":"2025-01-17T06:34:30","modified_gmt":"2025-01-17T06:34:30","slug":"i-have-pasted-a-link-above-if-that-does-not-work-please-see-the-code-below-to-determine-the-blanks","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/17\/i-have-pasted-a-link-above-if-that-does-not-work-please-see-the-code-below-to-determine-the-blanks\/","title":{"rendered":"I have pasted a link above if that does not work please see the code below to determine the blanks"},"content":{"rendered":"\n<p> I have pasted a link above if that does not work please see the code below to determine the blanks.<\/p>\n\n\n\n<p>GPIO_PORTD_DATA_R EQU 0x400073FC<br>GPIO_PORTD_DIR_R EQU 0 x40007400<br>GPIO_PORTD_DEN_R EQU 0 x4000751C<br>GPIO_PORTD_AMSEL_R EQU 0 x40007528<br>GPIO_PORTB_DATA_R EQU 0x400053FC<br>GPIO_PORTB_DIR_R EQU 0 x40005400<br>GPIO_PORTB_DEN_R EQU 0 x4000551C<br>SYSCTL_RCGCGPIO_R EQU 0 x400FE608<br>AREA | . t e x t | , CODE, READONLY, ALIGN=2<br>EXPORT <strong>main <em>_main LDR R0 , =PortConfiguration BLX R0 LDR R1 , =GPIO_PORTD_DATA_R RunForever LDR R2 , [<\/em><\/strong><em>]<br>STR R2 , [<strong>]<br>B R u nFo r ev e r<br>P o r t C o n f i g u r a t i o n<br>; Po r t B i n i t i a l i z a t i o n s f i r s t<br>LDR R0 , =<em>________<\/em><\/strong><\/em><br>LDR R1 , [ R0 ]<br>ORR R1 , R1 , #0x02<br>STR R1 , [ R0 ]<br>NOP<br>NOP<br>NOP<br>NOP<br>LDR R0 , =GPIO_PORTB_DIR_R<br>LDR R1 , [ R0 ]<br>ORR R1 , R1 , #0x______________<br>STR R1 , [ R0 ]<br>LDR R0 , =GPIO_PORTB_DEN_R<br>LDR R1 , [ R0 ]<br>ORR R1 , R1 , #0x______________<br>STR R1 , [ R0 ]<br>; Po r t D i n i t i a l i z a t i o n s<br>LDR R0 , =<strong><em><strong><em>_____<\/em><\/strong><\/em><\/strong><br>LDR R1 , [ R0 ]<br>ORR R1 , R1 , #0x08<br>STR R1 , [ R0 ]<br>NOP<br>NOP<br>NOP<br>NOP<br>LDR R0 , =GPIO_PORTD_DIR_R<br>LDR R1 , [ R0 ]<br>BIC R1 , R1 , #0x______________<br>STR R1 , [ R0 ]<br>LDR R0 , =GPIO_PORTD_AMSEL_R<br>LDR R1 , [ R0 ]<br>BIC R1 , R1 , #0x______________<br>STR R1 , [ R0 ]<br>LDR R0 , =GPIO_PORTD_DEN_R<br>LDR R1 , [ R0 ]<br>ORR R1 , R1 , #0x______________<br>STR R1 , [ R0 ]<br>BX LR<br>EXPORT S y s t e m I n i t<br>S y s t e m I n i t<br>BX LR<br>ALIGN<br>END<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>To complete the blanks in the assembly code, understanding the role of each register and instruction is critical. Here&#8217;s the filled assembly code with explanations:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Filled Assembly Code<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>GPIO_PORTD_DATA_R EQU 0x400073FC\nGPIO_PORTD_DIR_R EQU 0x40007400\nGPIO_PORTD_DEN_R EQU 0x4000751C\nGPIO_PORTD_AMSEL_R EQU 0x40007528\nGPIO_PORTB_DATA_R EQU 0x400053FC\nGPIO_PORTB_DIR_R EQU 0x40005400\nGPIO_PORTB_DEN_R EQU 0x4000551C\nSYSCTL_RCGCGPIO_R EQU 0x400FE608\n\nAREA |.text|, CODE, READONLY, ALIGN=2\nEXPORT __main\n__main\n    LDR R0, =PortConfiguration\n    BLX R0\n    LDR R1, =GPIO_PORTD_DATA_R\nRunForever\n    LDR R2, &#91;R1]  ; Access GPIO_PORTD_DATA_R\n    STR R2, &#91;R1]  ; Write back to GPIO_PORTD_DATA_R\n    B RunForever\n\nPortConfiguration\n    ; Port B initializations first\n    LDR R0, =SYSCTL_RCGCGPIO_R  ; Enable Port B clock\n    LDR R1, &#91;R0]\n    ORR R1, R1, #0x02           ; Set bit for Port B\n    STR R1, &#91;R0]\n    NOP\n    NOP\n    NOP\n    NOP\n    LDR R0, =GPIO_PORTB_DIR_R   ; Configure Port B direction\n    LDR R1, &#91;R0]\n    ORR R1, R1, #0x10           ; Enable pin 4 as output\n    STR R1, &#91;R0]\n    LDR R0, =GPIO_PORTB_DEN_R   ; Enable digital functionality\n    LDR R1, &#91;R0]\n    ORR R1, R1, #0x10           ; Enable pin 4\n    STR R1, &#91;R0]\n\n    ; Port D initializations\n    LDR R0, =SYSCTL_RCGCGPIO_R  ; Enable Port D clock\n    LDR R1, &#91;R0]\n    ORR R1, R1, #0x08           ; Set bit for Port D\n    STR R1, &#91;R0]\n    NOP\n    NOP\n    NOP\n    NOP\n    LDR R0, =GPIO_PORTD_DIR_R   ; Configure Port D direction\n    LDR R1, &#91;R0]\n    BIC R1, R1, #0x04           ; Clear bit 2 (input)\n    STR R1, &#91;R0]\n    LDR R0, =GPIO_PORTD_AMSEL_R ; Disable analog mode\n    LDR R1, &#91;R0]\n    BIC R1, R1, #0x04           ; Clear bit 2 (digital mode)\n    STR R1, &#91;R0]\n    LDR R0, =GPIO_PORTD_DEN_R   ; Enable digital functionality\n    LDR R1, &#91;R0]\n    ORR R1, R1, #0x04           ; Enable pin 2\n    STR R1, &#91;R0]\n    BX LR\n\nEXPORT SystemInit\nSystemInit\n    BX LR\nALIGN\nEND<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (300 Words)<\/strong><\/h3>\n\n\n\n<p>This assembly program initializes GPIO Ports B and D of a microcontroller, enabling specific pins for input or output with digital functionality. Here&#8217;s a breakdown:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Clock Enabling<\/strong>:<br>The <code>SYSCTL_RCGCGPIO_R<\/code> register enables clocks for the GPIO ports. Each bit corresponds to a specific port (<code>0x02<\/code> for Port B and <code>0x08<\/code> for Port D).<\/li>\n\n\n\n<li><strong>Port B Configuration<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The direction register (<code>GPIO_PORTB_DIR_R<\/code>) is updated to set pin 4 as output (<code>0x10<\/code>).<\/li>\n\n\n\n<li>The digital enable register (<code>GPIO_PORTB_DEN_R<\/code>) activates digital functionality for pin 4.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Port D Configuration<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The direction register (<code>GPIO_PORTD_DIR_R<\/code>) configures pin 2 as input using <code>BIC<\/code> to clear the bit (<code>0x04<\/code>).<\/li>\n\n\n\n<li>The analog mode select register (<code>GPIO_PORTD_AMSEL_R<\/code>) disables analog functionality on pin 2, setting it to digital mode.<\/li>\n\n\n\n<li>The digital enable register (<code>GPIO_PORTD_DEN_R<\/code>) enables digital functionality for pin 2.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Infinite Loop<\/strong>:<br>The program continuously reads from and writes back to <code>GPIO_PORTD_DATA_R<\/code>. This loop can simulate monitoring or toggling.<\/li>\n\n\n\n<li><strong>NOPs (No Operation)<\/strong>:<br>These instructions create a delay, ensuring proper synchronization during hardware operations.<\/li>\n<\/ol>\n\n\n\n<p>Understanding this code requires knowledge of ARM assembly, GPIO registers, and microcontroller architecture. Each step modifies memory-mapped registers to control hardware behavior, showcasing how low-level programming interfaces with physical systems.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have pasted a link above if that does not work please see the code below to determine the blanks. GPIO_PORTD_DATA_R EQU 0x400073FCGPIO_PORTD_DIR_R EQU 0 x40007400GPIO_PORTD_DEN_R EQU 0 x4000751CGPIO_PORTD_AMSEL_R EQU 0 x40007528GPIO_PORTB_DATA_R EQU 0x400053FCGPIO_PORTB_DIR_R EQU 0 x40005400GPIO_PORTB_DEN_R EQU 0 x4000551CSYSCTL_RCGCGPIO_R EQU 0 x400FE608AREA | . t e x t | , CODE, READONLY, ALIGN=2EXPORT main [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-183829","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/183829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=183829"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/183829\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=183829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=183829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=183829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}