This program is in verilog and need help to get it working
correctly. This is the code i have so far. Please help.
Simple testbench would be great. Thanks\
'define vend_a_drink {D,dispense,collect} = {IDLE,2'b11};
module drink_machine(nickel_in, dime_in, quarter_in,
collect, nickel_out, dime_out,
dispense, reset, clk) ;
parameter IDLE=0,FIVE=1,TEN=2,TWENTY_FIVE=3,
FIFTEEN=4,THIRTY=5,TWENTY=6,OWE_DIME=7;
input nickel_in, dime_in, quarter_in, reset, clk;
output collect, nickel_out, dime_out, dispense;
reg collect, nickel_out, dime_out, dispense;
reg [2:0] D, Q; /* state */
// synopsys state_vector Q
always @ ( nickel_in or dime_in or quarter_in or reset )
begin
nickel_out = 0;
dime_out = 0;
dispense = 0;
collect = 0;
if ( reset ) D = IDLE;
else begin
D = Q;
case ( Q )
IDLE:
if (nickel_in) D = FIVE;
else if (dime_in) D = TEN;
else if (quarter_in) D = TWENTY_FIVE;
FIVE:
if(nickel_in) D = TEN;
else if (dime_in) D = FIFTEEN;
else if (quarter_in) D = THIRTY;
TEN:
if (nickel_in) D = FIFTEEN;
else if (dime_in) D = TWENTY;
else if (quarter_in) 'vend_a_drink;
TWENTY_FIVE:
if( nickel_in) D = THIRTY;
else if (dime_in) 'vend_a_drink;
else if (quarter_in) begin
'vend_a_drink;
nickel_out = 1;
dime_out = 1;
end
FIFTEEN:
if (nickel_in) D = TWENTY;
else if (dime_in) D = TWENTY_FIVE;
else if (quarter_in) begin
'vend_a_drink;
nickel_out = 1;
end
THIRTY:
if (nickel_in) 'vend_a_drink;
else if (dime_in) begin
'vend_a_drink;
nickel_out = 1;
end
else if (quarter_in) begin
'vend_a_drink;
dime_out = 1;
D = OWE_DIME;
end
TWENTY:
if (nickel_in) D = TWENTY_FIVE;
else if (dime_in) D = THIRTY;
else if (quarter_in) begin
'vend_a_drink;
dime_out = 1;
end
OWE_DIME:
begin
dime_out = 1;
D = IDLE;
end
endcase
end
end
always @ (posedge clk ) begin
Q = D;
end
endmodule
Program to print the 32 number in form of binary, Hexa and
ASCI.
821
This program is in verilog and need help to get it working
correctly. This is the code i have so far. Please help.
Simple testbench would be great. Thanks\
'define vend_a_drink {D,dispense,collect} = {IDLE,2'b11};
module drink_machine(nickel_in, dime_in, quarter_in,
collect, nickel_out, dime_out,
dispense, reset, clk) ;
parameter IDLE=0,FIVE=1,TEN=2,TWENTY_FIVE=3,
FIFTEEN=4,THIRTY=5,TWENTY=6,OWE_DIME=7;
input nickel_in, dime_in, quarter_in, reset, clk;
output collect, nickel_out, dime_out, dispense;
reg collect, nickel_out, dime_out, dispense;
reg [2:0] D, Q; /* state */
// synopsys state_vector Q
always @ ( nickel_in or dime_in or quarter_in or reset )
begin
nickel_out = 0;
dime_out = 0;
dispense = 0;
collect = 0;
if ( reset ) D = IDLE;
else begin
D = Q;
case ( Q )
IDLE:
if (nickel_in) D = FIVE;
else if (dime_in) D = TEN;
else if (quarter_in) D = TWENTY_FIVE;
FIVE:
if(nickel_in) D = TEN;
else if (dime_in) D = FIFTEEN;
else if (quarter_in) D = THIRTY;
TEN:
if (nickel_in) D = FIFTEEN;
else if (dime_in) D = TWENTY;
else if (quarter_in) 'vend_a_drink;
TWENTY_FIVE:
if( nickel_in) D = THIRTY;
else if (dime_in) 'vend_a_drink;
else if (quarter_in) begin
'vend_a_drink;
nickel_out = 1;
dime_out = 1;
end
FIFTEEN:
if (nickel_in) D = TWENTY;
else if (dime_in) D = TWENTY_FIVE;
else if (quarter_in) begin
'vend_a_drink;
nickel_out = 1;
end
THIRTY:
if (nickel_in) 'vend_a_drink;
else if (dime_in) begin
'vend_a_drink;
nickel_out = 1;
end
else if (quarter_in) begin
'vend_a_drink;
dime_out = 1;
D = OWE_DIME;
end
TWENTY:
if (nickel_in) D = TWENTY_FIVE;
else if (dime_in) D = THIRTY;
else if (quarter_in) begin
'vend_a_drink;
dime_out = 1;
end
OWE_DIME:
begin
dime_out = 1;
D = IDLE;
end
endcase
end
end
always @ (posedge clk ) begin
Q = D;
end
endmodule
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