7 Segment Display Using Common Anode Verilog
//Verilog module.module segment7 (bcd,seg);//Declare inputs,outputs and internal variables.input 3: 0 bcd;output 6: 0 seg;reg 6: 0 seg;//always block for converting bcd digit into 7 segment formatalways @ ( bcd )begincase ( bcd ) //case statement0: seg = 7'b0000001;1: seg = 7'b1001111;2: seg = 7'b0010010;3: seg = 7'b0000110;4: seg = 7'b1001100;5: seg = 7'b0100100;6: seg = 7'b0100000;7: seg = 7'b0001111;8: seg = 7'b0000000;9: seg = 7'b0000100;//switch off 7 segment character when the bcd digit is not a decimal number.default: seg = 7'b1111111;endcaseendendmodule.
There are two types of LED 7-segment display: Common Cathode (CC). The truth table is for displaying 1 to 9 with CA 7-segment. We will use the same task to illustrate how to control seven-segment in Verilog code. A standard 7-segment LED display generally has eight (8) input connections, one for each LED segment and one that acts as a common terminal or connection for all the internal display segments. Some single displays have also have an additional input pin to display a decimal point in their lower right or left hand corner.
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