{"id":13601,"date":"2023-01-13T14:24:04","date_gmt":"2023-01-13T08:54:04","guid":{"rendered":"https:\/\/fastbitlab.com\/?p=13601"},"modified":"2023-08-19T15:47:11","modified_gmt":"2023-08-19T10:17:11","slug":"microcontroller-embedded-c-programming-lecture-160-bit-field-structure-for-rcc_ahb1enr","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/microcontroller-embedded-c-programming-lecture-160-bit-field-structure-for-rcc_ahb1enr\/","title":{"rendered":"Microcontroller Embedded C Programming Lecture 160| Bit-field structure for RCC_AHB1ENR"},"content":{"rendered":"<div class=\"boldgrid-section\" style=\"background-image: linear-gradient(to left, #eeeeee, #eeeeee);\" data-bg-color-1=\"#EEEEEE\" data-bg-color-2=\"#EEEEEE\" data-bg-direction=\"to left\">\n<div class=\"container\">\n<div class=\"row\" style=\"padding-top: 35px; padding-bottom: 0px; background-image: linear-gradient(to left, #eeeeee, #eeeeee);\" data-bg-color-1=\"#EEEEEE\" data-bg-color-2=\"#EEEEEE\" data-bg-direction=\"to left\">\n<div class=\"col-md-1 col-sm-12 col-xs-12 col-lg-1\">\n<div class=\"boldgrid-shortcode\" data-imhwpb-draggable=\"true\">\n\n<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"col-md-10 col-sm-12 col-xs-12 col-lg-10\">\n<h1 class=\"\" style=\"text-align: center; font-size: 32px; border-width: 0px; line-height: 45px;\"><strong><span style=\"color: #000080;\"><strong>Bit-field structure for RCC_AHB1ENR<\/strong><\/span><\/strong><\/h1>\n<div class=\"row bg-editor-hr-wrap\" style=\"border-width: 0px; margin-top: 0px;\">\n<div class=\"col-lg-12 col-md-12 col-xs-12 col-sm-12\">\n<div>\n<div class=\"bg-hr bg-hr-10 color2-color\" style=\"border-style: solid; border-width: 0px 0px 3px;\"><\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"\" style=\"font-size: 17px; line-height: 30px; font-family: 'Roboto Slab'; font-weight: 400;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"color: #000000;\">The RCC_AHB1ENR register is a control register used in the STM32 microcontroller series for enabling or disabling clock signals for various peripherals connected to the AHB1 (Advanced High-Performance Bus 1) bus.<\/span><\/p>\n<p class=\"\" style=\"font-family: 'Roboto Slab'; font-weight: 400; font-size: 17px; line-height: 30px;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\">The RCC_AHB1ENR register typically consists of multiple individual bits, each representing the enable\/disable state of a specific peripheral clock signal. These individual bits are often referred to as bit fields.<\/p>\n<p class=\"\" style=\"border-width: 0px; font-size: 17px; line-height: 30px; font-family: 'Roboto Slab'; font-weight: 400;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"font-weight: 400; color: #000000;\">The below figure shows the typedef structure for the RCC_AHB1ENR.<\/span><\/p>\n<pre class=\"color-5-text-contrast color5-background-color\" style=\"font-size: 12px; box-shadow: #cecece 0px 0px 0px 0px inset;\"><span style=\"color: #ff99cc;\">#ifndef<\/span> MAIN_H_\r\n<span style=\"color: #ff99cc;\">#define<\/span> MAIN_H_\r\n\r\n<span style=\"color: #ff99cc;\">#include<\/span>&lt;stdint.h&gt;\r\n\r\n<span style=\"color: #ff99cc;\">typedef struct<\/span>\r\n{\r\n   <span style=\"color: #008000;\"> uint32_t<\/span> gpioa_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpiob_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpioc_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpiod_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpioe_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpiof_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpiog_en     :1;\r\n   <span style=\"color: #008000;\"> uint32_t<\/span> gpioh_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> gpioi_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> reserved1    :3;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> crc_en       :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> reserved2    :3;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> reserved3    :2;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> bkpsram_en   :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> reserved4    :1;\r\n   <span style=\"color: #008000;\"> uint32_t<\/span> ccmdat_en    :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> dma1_en      :1;\r\n   <span style=\"color: #008000;\"> uint32_t<\/span> dma2_en      :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> reserved5    :2;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> ethmac_en    :1;\r\n <span style=\"color: #008000;\">   uint32_t<\/span> ethmactx_en  :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> ethmacrx_en  :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> ethmacptp_en :1;\r\n   <span style=\"color: #008000;\"> uint32_t<\/span> otghs_en     :1;\r\n    <span style=\"color: #008000;\">uint32_t<\/span> otghsulpi_en :1;\r\n}<span style=\"color: #008000;\">RCC_AHB1ENR_t<\/span>;\r\n\r\n\r\n\r\n<span style=\"color: #ff99cc;\">#endif<\/span> <span style=\"color: #008000;\">\/* MAIN_H_ *\/<\/span><\/pre>\n<p class=\"\" style=\"text-align: center;\"><span style=\"color: #000000;\">typedef struct for the RCC_AHB1ENR<\/span><\/p>\n<p class=\"\">&nbsp;<\/p>\n<p class=\"\" style=\"border-width: 0px; font-family: 'Roboto Slab'; font-weight: 400; font-size: 17px; line-height: 30px;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"font-weight: 400; color: #000000;\">This completely encodes the&nbsp; AHB1ENR register.&nbsp;<\/span><\/p>\n<p class=\"\" style=\"border-width: 0px; font-family: 'Roboto Slab'; font-weight: 400; font-size: 17px; line-height: 30px;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"font-weight: 400; color: #000000;\">And also for the reserved member elements use different names. Here I have used reserved1,&nbsp; reserved2, and reserved3, like that. Because two member elements cannot have the same name. That&#8217;s why you can do something like this.<\/span><\/p>\n<p class=\"\" style=\"border-width: 0px; font-family: 'Roboto Slab'; font-weight: 400; font-size: 17px; line-height: 30px;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"font-weight: 400; color: #000000;\">After creating the typedef structure, always try to compile your code, that is very much important. So, it will immediately report whether there are any errors in the structures or not.<\/span><\/p>\n<p class=\"\" style=\"border-width: 0px; font-family: 'Roboto Slab'; font-weight: 400; font-size: 17px; line-height: 30px;\" data-font-family=\"Roboto Slab\" data-font-weight=\"400\" data-font-style=\"\"><span style=\"font-weight: 400; color: #000000;\">Similarly, create two more typedef structures. One for the GPIO mode register and another one for the GPIO output data register. I will show you in the following article.&nbsp;<\/span><\/p>\n<p class=\"\">&nbsp;<\/p>\n<p class=\"\" style=\"font-size: 20px; border-width: 0px; line-height: 30px;\"><span style=\"color: #000080;\"><b>FastBit Embedded Brain Academy Courses<\/b><\/span><\/p>\n<p class=\"\" style=\"font-size: 17px; border-width: 0px;\"><span style=\"color: #000000;\">C<span style=\"font-weight: 400;\"><span style=\"color: #000000;\">lick here:<\/span><span style=\"color: #0000ff;\">&nbsp;<\/span><\/span><\/span><span style=\"color: #0000ff;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"http:\/\/fastbitlab.com\/course1\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">https:\/\/fastbitlab.com\/course1<\/span><\/a><\/span><\/p>\n<p class=\"\">&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Bit-field structure for RCC_AHB1ENR &nbsp; The RCC_AHB1ENR register is a control register used in the STM32 microcontroller series for enabling or disabling clock signals for various peripherals connected to the AHB1 (Advanced High-Performance Bus 1) bus. The RCC_AHB1ENR register typically consists of multiple individual bits, each representing the enable\/disable state of a specific peripheral [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13604,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[],"footnotes":""},"categories":[8],"tags":[16],"class_list":["post-13601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-microcontroller-embedded-c-programming","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bit-Field Structure for RCC_AHB1ENR in STM32 Microcontrollers<\/title>\n<meta name=\"description\" content=\"Bit-field structure for RCC_AHB1ENR. 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