{"id":587,"date":"2024-06-22T13:33:54","date_gmt":"2024-06-22T13:33:54","guid":{"rendered":"https:\/\/iotthinghub.com\/?p=587"},"modified":"2024-08-10T18:00:47","modified_gmt":"2024-08-10T18:00:47","slug":"7-segment-display","status":"publish","type":"post","link":"https:\/\/iotthinghub.com\/?p=587","title":{"rendered":"7 Segment Display"},"content":{"rendered":"\t\t
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Seven Segment display are of two types<\/p>

  1. Common Cathode<\/strong><\/h6><\/li>
  2. Common Anode<\/strong><\/h6><\/li><\/ol>

    Common Cathode:- <\/strong>In the common cathode type 7 segment displays, the \u2013Ve terminal of all LEDs is connected to the COM pin. A 7 segment can be lightening up when +5v is given to the respective LED segment and ground connected to common.<\/p>

    Common Anode:- <\/strong>In the common cathode type 7 segment the +5v terminal of all the LEDs is commonly connected to the common port of the 7 segment. A seven segment can be lighten up when the COM port is connected to the +5v battery supply and ground is given to respective LED segment.<\/p>

    \"\"<\/p>

    \"\"<\/p>

    \"\"<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
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    In this section we only discuss about user-defined function<\/strong> and switch<\/strong> statement.<\/p>

    C functions can be classified into two categories, namely, library functions and user-defined function. In order to make use of a user defined function, we need to establish three elements that are related to functions.<\/p>

    1. Function definition<\/li>
    2. Function call<\/li>
    3. Function declaration<\/li><\/ol>

      The format is<\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Function declaration<\/strong><\/h6>
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int main(void)<\/strong><\/h6>
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0function call;<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return 0;<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0}<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Function definition<\/strong><\/h6>

      Note that function definition does not terminate with a semicolon.<\/p>

      Function definition (Formation)<\/strong><\/p>

      function_type function_name(parameter list)<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 {<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0local variable declarations;<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 executable ststement;<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 —————————–<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0return (Value)<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0}<\/strong><\/h6>

      Here function name may be any name you give, data type may be int, or float, or char\u2026etc. and parameter list may be (int m,n,float name,char lift);<\/p>

      Function declaration (Formation)<\/strong><\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 function_type function_name(parameter list);<\/strong><\/h6>

      Function call (Formation)<\/strong><\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 data_type= function_name(return_data_type);<\/strong><\/h6>\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\t\t<\/div>\n\t\t
      \n\t\t\t\t\t
      \n\t\t\t\t
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      \n\t\t\t\t\t\t\t\t\t

      \"\"<\/p>

      Switch:-\u00a0 <\/strong>It is a conditional expression that check the resultant value compare with a set of value and give an appropriate result corresponding to that value.<\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Formation<\/strong><\/p>

      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 switch(expression)<\/h6>
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 case value-1:block 1;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 case value-2:block 2;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 case value-3:block 3;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0break;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0—————–<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0default:<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0default \u2013block;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0break;<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0}<\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 statement \u2013x;<\/strong><\/h6>

      Let make our own seven segment display header file with the help of this switch function. Let choose a cathode LED and our user defined function should be an integer argument and integer return function. So that in user-defined function will be<\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 int seven_segment(int value);\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0——-> Function declaration<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int digit=seven_segment(digit you desire); \u00a0\u00a0——-> Function Call<\/strong><\/h6>
      \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int seven_segment(int value)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0——-> Function Definition<\/strong><\/h6>

      \u00a0<\/strong><\/p>

      Let separate the total user-defined function to three part. Make two new file and save as in the same folder where the main.c file saved and named it -> segment.c and segment.h. Our main goal is to separate the user-defined function and each part should include<\/p>

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 main.c file<\/span>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 —————–> Function call<\/strong><\/h6>
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 segment.c file<\/span>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0—————–> Function definition<\/strong><\/h6>
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 segment.h file<\/span>\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0—————–> Function declaration<\/strong><\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
      \n\t\t\t\t
      \n\t\t\t\t\t\t\t\t\t

      \"\"<\/p>

      \"\"<\/p>

      Here interesting thing that in segment.c\u00a0<\/span> file we include segment.h<\/span> file because we store function declaration in segment.h<\/span> \u00a0file.<\/p>

      \"\"<\/p>

      Now our main.c file is very simple. In this program we display 0-9 in 7 segment and the process repeat.<\/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\t\t<\/div>\n\t\t

      \n\t\t\t\t\t
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      \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\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
      \n\t\t\t\t
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      \n\t\t\t
      <\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
      \n\t\t\t\t\t
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      In AVR IDE platform to integrate all three file we need some change in WinAVR and Microchip Stdio. In WinAVR just change in MFile\u00a0 -><\/span><\/p>

      \"\"<\/p>

      \"\"<\/p>

      One interesting about that in WinAVR the F_CPU=8MHz and Microchip Studio F_CPU=1MHz by default.<\/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\t\t<\/div>\n\t\t

      \n\t\t\t\t\t
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      \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tdownload<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
      \n\t\t\t\t
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      Download the full program with proteus simulation<\/a><\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

      Seven Segment display are of two types Common Cathode Common Anode Common Cathode:- In the common cathode type 7 segment displays, the \u2013Ve terminal of all LEDs is connected to the COM pin. A 7 segment can be lightening up when +5v is given to the respective LED segment and ground connected to common. Common […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,9],"tags":[],"class_list":["post-587","post","type-post","status-publish","format-standard","hentry","category-basic-phepharials","category-i-o-port-operations"],"_links":{"self":[{"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/posts\/587","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=587"}],"version-history":[{"count":85,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/posts\/587\/revisions"}],"predecessor-version":[{"id":2532,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=\/wp\/v2\/posts\/587\/revisions\/2532"}],"wp:attachment":[{"href":"https:\/\/iotthinghub.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iotthinghub.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}