Frame loss detection module

//丢帧检测模块
reg [23:0] Exact_completed_flag_counter,symbol_bpsk_valid_counter,out_valid_counter;
reg symbol_bpsk_valid_d1,out_valid_d1;
always @(posedge clk)
if(!rst)
begin
　　Exact_completed_flag_counter <= 0;
　　symbol_bpsk_valid_counter <= 0;
　　out_valid_counter <= 0;
end
else
begin
　　symbol_bpsk_valid_d1 <= symbol_bpsk_valid;
　　out_valid_d1 <= out_valid;
　　if(Exact_completed_flag)
　　　　Exact_completed_flag_counter <= Exact_completed_flag_counter + 1;
　　if(symbol_bpsk_valid_d1 == 0 && symbol_bpsk_valid == 1)
　　　　symbol_bpsk_valid_counter <= symbol_bpsk_valid_counter + 1;
　　if(out_valid_d1 == 0 && out_valid == 1)
　　　　out_valid_counter <= out_valid_counter + 1;
end
ila_frame_counter ila_frame_counter (
　　.clk(clk), // input wire clk
　　.probe0(Exact_completed_flag), // input wire [0:0] probe0
　　.probe1(Exact_completed_flag_counter), // input wire [23:0] probe1
　　.probe2(symbol_bpsk_valid_counter), // input wire [23:0] probe2
　　.probe3(out_valid_counter) // input wire [23:0] probe3
);