?? irda.v.bak
字號:
module irda(
clk,
rst,
ir_tx,
ir_rx,
led,
keyin,
led1
);
input clk;
input rst;
input ir_rx;
input keyin;
output ir_tx;
output led;
output led1;
reg [8:0] cnt;
reg tx_carrier;
wire carry;
//generate the 40k carrier
assign carry=(cnt==9'd329) ? 1'b1 : 1'b0;
always @ (posedge clk or posedge rst)
if (rst)
cnt<=9'h000;
else if(carry)
cnt<=9'h000;
else
cnt<=cnt+1'b1;
always @ (posedge clk or posedge rst)
if (rst)
tx_carrier<=1'b0;
else if (carry)
tx_carrier<=~tx_carrier;
else
tx_carrier<=tx_carrier;
//assign ir_tx=(keyin) ? tx_carrier : 1'b0;
assign ir_tx=1'b0;
assign led=keyin;
assign led1=ir_rx;
endmodule
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