I have the problem that my RS232 always is sending data to the PC

here is a functioning receiver.

greeting

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module rs232_rx (

input clock,

input rxd,

output reg [7:0] led_g

);

parameter idle = 2'b01;

parameter ready = 2'b10;

parameter busy = 2'b11;

reg [1:0] state=idle;

reg [3:0] rxd_sr=4'b1111;

reg [7:0] rxsr=8'b00000000;

reg [3:0] rxbitcnt;

reg [11:0] rxcnt;

reg [7:0] rx_data;

reg rx_en = 0;

parameter rcv_bit_per = 2604; //19200 Baud

always @(posedge clock ) begin

if(rx_en==1)

led_g =rx_data;

end

always @(posedge clock ) begin

rxd_sr = {rxd_sr[2:0], rxd};

rx_en = 0;

case (state)

idle:

begin

if(rxd_sr[3:2] == 2'b10)

begin

rxcnt =1302;

rxbitcnt =0;

state =busy;

end

end

busy:

begin

if(rxbitcnt<9)

begin

if(rxcnt < rcv_bit_per)

rxcnt =rxcnt+1;

else

begin

rxcnt =0;

rxbitcnt <=rxbitcnt+1;

rxsr ={rxd_sr[2], rxsr[7:1]};

end

end

else

state=ready;

end

ready:

begin

rx_data =rxsr;

state =idle;

rx_en =1;

end

endcase

end

endmodule

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