?? control.v
字號:
module cntrol(
reset,rst,clk16x,tsre,tbre,din,dout,rdn,wrn,led,data_ready
);
input reset;
input clk16x;
input tsre;
input tbre;
input data_ready;
output rst;
output [7:0] din;
input [7:0] dout;
output [7:0] led;
output wrn;
output rdn;
reg [7:0] counter;
reg [7:0] delay;
reg [7:0] din;
reg [7:0] data_temp;
reg wrn;
reg rdn;
assign rst = !reset;
always @(posedge tsre)
if(rst) counter[7:0] = 8'h0;
else
counter[7:0] = counter[7:0] + 1;
assign led[7:0] = counter[7:0];
always @(posedge clk16x or posedge rst)
if(rst)
delay[7:0] = 0;
else if(data_ready == 1)
delay[7:0] = 0;
else
delay[7:0] = delay[7:0] + 1;
always @(posedge clk16x)
if(2 <= delay[7:0] && delay[7:0] <= 5)
rdn = 0;
else
rdn = 1;
always @(posedge clk16x)
if(3 <= delay[7:0] && delay[7:0] <= 4)
data_temp = dout;
else
data_temp = data_temp;
always @(posedge clk16x)
if(9 <= delay[7:0] && delay[7:0] <= 12)
wrn = 0;
else
wrn = 1;
always @(posedge clk16x)
if(7 <= delay[7:0] && delay[7:0] <= 13)
din = data_temp;
else
din = data_temp;
endmodule
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