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// Somador Binário de 2 Bits module SomadorBinario2 (SW, LEDR); input [3:0] SW; output [2:0] LEDR; wire A1, A0, B1, B0, S1, S0, C, Ci; assign B0 = SW[0]; assign B1 = SW[1]; assign A0 = SW[2]; assign A1 = SW[3]; assign LEDR[0] = S0; assign LEDR[1] = S1; assign LEDR[2] = C; SomadorCompleto U1(S0, Ci, A0, B0, 0); SomadorCompleto U2(S1, C, A1, B1, Ci); Endmodule
// Subtrator Binário de 2 Bits module SubtratorBinario2 (SW, LEDR); input [3:0] SW; output [2:0] LEDR; wire A1, A0, B1, B0, S1, S0, C, Ci; assign B0 = SW[0]; assign B1 = SW[1]; assign A0 = SW[2]; assign A1 = SW[3]; assign LEDR[0] = S0; assign LEDR[1] = S1; assign LEDR[2] = C; SubtratorCompleto U1(S0, Ci, A0, B0, 0); SubtratorCompleto U2(S1, C, A1, B1, Ci); endmodule
// Módulo SomadorCompleto module SomadorCompleto (S, Co, A, B, Ci); input A, B, Ci; output S, Co;
wire x, y, z; Porta_XOR U1(S, A, B, Ci); Porta_AND U2(x, A, B, 1); Porta_AND U3(y, A, Ci, 1); Porta_AND U4(z, B, Ci, 1); Porta_OR U5(Co, x, y, z); endmodule
// Módulo SubtratorCompleto module SubtratorCompleto (S, Co, A, B, Ci); input A, B, Ci; output S, Co; wire x, y, z; Porta_XOR U1(S, A, B, Ci); Porta_AND U2(x, ~A, B, 1); Porta_AND U3(y, ~A, Ci, 1); Porta_AND U4(z, B, Ci, 1); Porta_OR U5(Co, x, y, z); endmodule
// Módulo Porta_AND module Porta_AND(S, A, B, C); input A, B, C; output S; assign S = A&B&C; endmodule
// Módulo Porta_OR module Porta_OR(S, A, B, C); input A, B, C; output S; assign S = A | B | C; endmodule
module FlipFlopD(Q, D, CK, CLR); input D, CK, CLR; output Q; reg Q; always @(negedge CK or negedge CLR) begin if(!CLR) Q = 0; else Q = D; end endmodule
//Módulo do Flip-Flop JK module FlipFlopJK(Q, J, K, CK, CLR); input J, K, CK, CLR; output Q; reg Q; always @(negedge CK or negedge CLR) begin if(!CLR) Q = 0; else begin case ({J, K}) 0: Q = Q; 1: Q = 0; 2: Q = 1; 3: Q = ~Q; endcase end end endmodule
//Módulo da porta NAND module porta_NAND(S, A, B); input A, B; output S; assign S = ~(A&B);
endmodule // Registrador entrada paralela / saída serial de 4 bits wire Q, E, CK, CLR; wire[3:0] I, x; wire [2:0] y; assignI [3:0] = SW [3:0] assignE = SW[4]; assign CLR = SW[5]; assign CK = CLOCK_27; porta_NAND U0( x[3], I[3], E); porta_NAND U1( x[2], I[2], E); porta_NAND U2( x[1], I[1], E); porta_NAND U3( x[0], I[0], E); FlipFlopD_PR U4( y[2], 0, CK, CLR, x[3] ); FlipFlopD_PR U5( y[1], y[2], CK, CLR, x[2] ); FlipFlopD_PR U6( y[0], y[1], CK, CLR, x[1] ); FlipFlopD_PRU7(Q, y[0], CK, CLR, x[0] ); assign LEDR[0] = Q; endmodule
//Módulo do Flip-Flop D com entrada PR module FlipFlopD_PR(Q, D, CK, CLR, PR); input D, CK, CLR, PR; output Q; reg Q; always @(negedge CK or negedge CLR or negedge PR) begin if(!CLR) Q = 0; else if(!PR) Q = 1; else Q = D; end endmodule
// Registrador de deslocamento direita/esquerda de 4 bits wire [3:0] q, x; wire [1:0] y;
// Contador gray síncrono modulo 6 decrescente wire CK, CLR; wire [2:0] A, J, K; assign CLR = SW[0]; assign CK = KEY[0]; assign K[2] = ~A[0]; assign J[1] = ~A[0]; assign J[0] = ~A[2]; porta_AND U1(J[2], ~A[1], ~A[0]); porta_AND U2(K[1], ~A[2], A[0]); porta_OR U3(K[0], ~A[1], A[2]); FlipFlop_JK W2(A[2], CK, CLR, J[2], K[2]); FlipFlop_JK W1(A[1], CK, CLR, J[1], K[1]); FlipFlop_JK W0(A[0], CK, CLR, J[0], K[0]); assign LEDR[2:0] = A[2:0]; endmodule
// Contador Johnson modificado de 4 bits wire CK, CLR, x, y;wire [3:0] A, J, K; assign CLR = SW[0]; assign CK = KEY[0];assign J[2] = A[3]; assign K[2] = ~A[3]; assign J[1] = A[2];assign K[1] = ~A[2]; assign J[0] = A[1]; assign K[0] = ~A[1];porta_OR U1(x, ~A[2], ~A[1]); porta_AND U2(J[3], x, ~A[0]); porta_OR U3(y, A[2], A[1]);porta_AND U4(K[3], y, A[0]); FlipFlop_JK W3(A[3], CK, CLR, J[3], K[3]);FlipFlop_JK W2(A[2], CK, CLR, J[2], K[2]); FlipFlop_JK W1(A[1], CK, CLR, J[1], K[1]); FlipFlop_JK W0(A[0], CK, CLR, J[0], K[0]);assign LEDR[3:0] = A[3:0]; endmodule
//Contador síncrono em anel 4 de bitswire CK, CLR, S;
wire [3:0]Y, D; wire [0:3]Q; assign Y[3:0] = SW[3:0]; assign S = SW[4];
assign CLR = SW[5]; assign CK = KEY[0]; mux21 U0(Y[0], Q[3], S, D[0]); mux21 U1(Y[1], Q[0], S, D[1]); mux21 U2(Y[2], Q[1], S, D[2]); mux21 U3(Y[3], Q[2], S, D[3]); FlipFlop_D W0(Q[0], CK, CLR, D[0]);FlipFlop_D W1(Q[1], CK, CLR, D[1]); FlipFlop_D W2(Q[2], CK, CLR, D[2]);FlipFlop_D W3(Q[3], CK, CLR, D[3]); assign LEDR[3:0] = Q[0:3]; endmodule
// Contador assíncrono módulo 8 crescente/decrescente wire CK, CLR, C;wire [2:0]Q; assign C = SW[0]; assign CLR = SW[1];assign CK = KEY[0]; mux21 U0(x, Q[0], ~Q[0], C); mux21 U1(y, Q[1], ~Q[1], C);FlipFlop_T W0(Q[0], CK, CLR, 1); FlipFlop_T W1(Q[1], x, CLR, 1);FlipFlop_T W2(Q[2], y, CLR, 1); assign LEDR[2:0] = Q[2:0]; endmodule
