{"id":1635,"date":"2021-09-07T22:30:02","date_gmt":"2021-09-07T22:30:02","guid":{"rendered":"https:\/\/mc.scsiraidguru.com\/?page_id=1635"},"modified":"2024-03-06T16:28:31","modified_gmt":"2024-03-06T16:28:31","slug":"7segment_led13_lsb","status":"publish","type":"page","link":"https:\/\/mc.scsiraidguru.com\/index.php\/raspberry-pi\/shift-registers\/sn74hc595_pi\/7segment_led13_lsb\/","title":{"rendered":"7Segment_LED13_LSB"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1635\" class=\"elementor elementor-1635\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3f6d8a8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3f6d8a8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cd116cf\" data-id=\"cd116cf\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eedf80a elementor-widget elementor-widget-text-editor\" data-id=\"eedf80a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<pre>import RPi.GPIO as GPIO\nimport time\nfrom smbus import SMBus\nard_addr = bytearray([0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c])\nled_addr_LSB = bytearray([0x66, 0xb6, 0xbe, 0xe0, 0xe6, 0xee, 0x3e, 0x1a])\nbus = SMBus(1) # indicates \/dev\/ic2-1\n\n\n\nLSBFIRST = 1\nMSBFIRST = 2\n\ndataPin   = 11    #DS Pin of 74HC595(Pin14)\nlatchPin  = 13    #ST_CP Pin of 74HC595(Pin12)\nclockPin = 15    #CH_CP Pin of 74HC595(Pin11)\n\ndef setup():\n    GPIO.setwarnings(False)\n    GPIO.setmode(GPIO.BOARD)\n    GPIO.setup(dataPin, GPIO.OUT)\n    GPIO.setup(latchPin, GPIO.OUT)\n    GPIO.setup(clockPin, GPIO.OUT)\n  \ndef shiftOut(dPin,cPin,order,val):\n    for i in range(0,8):\n        GPIO.output(cPin,GPIO.LOW);\n        if(order == LSBFIRST):\n            GPIO.output(dPin,(0x01&amp;(val&gt;&gt;i)==0x01) and GPIO.HIGH or GPIO.LOW)\n        elif(order == MSBFIRST):\n            GPIO.output(dPin,(0x80&amp;(val&lt;&lt;i)==0x80) and GPIO.HIGH or GPIO.LOW)\n        GPIO.output(cPin,GPIO.HIGH);  \n\ndef loop():\n    cnt = 0\n    while True:\n        cnt = 0\n        GPIO.output(latchPin,GPIO.LOW)\n        shiftOut(dataPin,clockPin,LSBFIRST,0x00)\n        GPIO.output(latchPin,GPIO.HIGH)\n        time.sleep(0.1)      \n        while cnt &lt; 8:\n            \n            # turn on LED 13\n            bus.write_byte(ard_addr[cnt], 0x1) #switch it on        \n            GPIO.output(latchPin,GPIO.LOW)\n            shiftOut(dataPin,clockPin,LSBFIRST,led_addr_LSB[cnt])\n            GPIO.output(latchPin,GPIO.HIGH)\n            time.sleep(2) \n            # turn off LED 13\n            bus.write_byte(ard_addr[cnt], 0x0) #switch it off\n            time.sleep(2)                    \n            # blank \n            GPIO.output(latchPin,GPIO.LOW)\n            shiftOut(dataPin,clockPin,LSBFIRST,0x00)\n            GPIO.output(latchPin,GPIO.HIGH)\n            time.sleep(0.1)\n            cnt += 1\n\n     \ndef destroy(): \n    GPIO.cleanup()\n\nif __name__ == '__main__':\n    print ('Program is starting...' )\n    setup() \n    try:\n        loop()  \n    except KeyboardInterrupt:  \n        destroy()   \n<\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e086518 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e086518\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4fa716a\" data-id=\"4fa716a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2c4f145 elementor-widget elementor-widget-text-editor\" data-id=\"2c4f145\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><a href=\"https:\/\/mc.scsiraidguru.com\/raspberry_pi\/shift_registers_pi\/SN74HC595_pi\/7Segment_LED13\/Pi\/7Segment_LED13_LSB.py\">7Segment_LED13_LSB.py<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6608994 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6608994\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-af9f4b0\" data-id=\"af9f4b0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-badd391 elementor-widget elementor-widget-text-editor\" data-id=\"badd391\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>I combined the 7 Segment display of the Raspberry Pi and the 8 Arduino LED 13 code. I tightened up the code. This one uses the LSB logic table below.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-27f2b88 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"27f2b88\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8a06d11\" data-id=\"8a06d11\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1b8bb4f elementor-widget elementor-widget-image\" data-id=\"1b8bb4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/09\/lsb_logic_table.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"lsb_logic_table\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTYxOCwidXJsIjoiaHR0cHM6XC9cL21jLnNjc2lyYWlkZ3VydS5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjFcLzA5XC9sc2JfbG9naWNfdGFibGUuanBnIn0%3D\">\n\t\t\t\t\t\t\t<img data-opt-id=403258774  fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"160\" src=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:300\/h:160\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/09\/lsb_logic_table.jpg\" class=\"attachment-medium size-medium wp-image-1618\" alt=\"\" srcset=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:641\/h:341\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/09\/lsb_logic_table.jpg 641w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:300\/h:160\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/09\/lsb_logic_table.jpg 300w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>import RPi.GPIO as GPIO import time from smbus import SMBus ard_addr = bytearray([0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c]) led_addr_LSB = bytearray([0x66, 0xb6, 0xbe, 0xe0, 0xe6, 0xee, 0x3e, 0x1a]) bus = SMBus(1) # indicates \/dev\/ic2-1 LSBFIRST = 1 MSBFIRST = 2 dataPin = 11 #DS Pin of 74HC595(Pin14) latchPin = 13 #ST_CP Pin of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":1570,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","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":"custom","ocean_center_header_left_menu":"0","ocean_custom_header_template":"7164","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","osh_disable_topbar_sticky":"default","osh_disable_header_sticky":"default","osh_sticky_header_style":"default","osh_sticky_header_effect":"","osh_custom_sticky_logo":0,"osh_custom_retina_sticky_logo":0,"osh_custom_sticky_logo_height":0,"osh_background_color":"","osh_links_color":"","osh_links_hover_color":"","osh_links_active_color":"","osh_links_bg_color":"","osh_links_hover_bg_color":"","osh_links_active_bg_color":"","osh_menu_social_links_color":"","osh_menu_social_hover_links_color":"","footnotes":""},"class_list":["post-1635","page","type-page","status-publish","hentry","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>7Segment_LED13_LSB -<\/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:\/\/mc.scsiraidguru.com\/index.php\/raspberry-pi\/shift-registers\/sn74hc595_pi\/7segment_led13_lsb\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"7Segment_LED13_LSB -\" \/>\n<meta property=\"og:description\" content=\"import RPi.GPIO as GPIO import time from smbus import SMBus ard_addr = bytearray([0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c]) led_addr_LSB = bytearray([0x66, 0xb6, 0xbe, 0xe0, 0xe6, 0xee, 0x3e, 0x1a]) bus = SMBus(1) # indicates \/dev\/ic2-1 LSBFIRST = 1 MSBFIRST = 2 dataPin = 11 #DS Pin of 74HC595(Pin14) latchPin = 13 #ST_CP Pin of [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mc.scsiraidguru.com\/index.php\/raspberry-pi\/shift-registers\/sn74hc595_pi\/7segment_led13_lsb\/\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-06T16:28:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:300\/h:160\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/09\/lsb_logic_table.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" 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