Subversion Repositories spacewiresystemc

//+FHDR------------------------------------------------------------------------
//Copyright (c) 2013 Latin Group American Integhrated Circuit, Inc. All rights reserved
//GLADIC Open Source RTL
//-----------------------------------------------------------------------------
//FILE NAME	 :
//DEPARTMENT	 : IC Design / Verification
//AUTHOR	 : Felipe Fernandes da Costa
//AUTHOR’S EMAIL :
//-----------------------------------------------------------------------------
//RELEASE HISTORY
//VERSION DATE AUTHOR DESCRIPTION
//1.0 YYYY-MM-DD name
//-----------------------------------------------------------------------------
//KEYWORDS : General file searching keywords, leave blank if none.
//-----------------------------------------------------------------------------
//PURPOSE  : ECSS_E_ST_50_12C_31_july_2008
//-----------------------------------------------------------------------------
//PARAMETERS
//PARAM NAME		RANGE	: DESCRIPTION : DEFAULT : UNITS
//e.g.DATA_WIDTH	[32,16]	: width of the DATA : 32:
//-----------------------------------------------------------------------------
//REUSE ISSUES
//Reset Strategy	:
//Clock Domains		:
//Critical Timing	:
//Test Features		:
//Asynchronous I/F	:
//Scan Methodology	:
//Instantiations	:
//Synthesizable (y/n)	:
//Other			:
//-FHDR------------------------------------------------------------------------
 
`timescale 1ns/1ns
 
module TX_SPW (
		input pclk_tx,
		//
		input [8:0] data_tx_i,
		input txwrite_tx,
		//
		input [7:0] timecode_tx_i,
		input tickin_tx,
		//
		input enable_tx,
		input send_null_tx,
		input send_fct_tx,
 
		//
		input gotfct_tx,
		input send_fct_now,
		//
		output reg tx_dout_e,
		output reg tx_sout_e,
		//
		output  reg ready_tx_data,
		output  reg ready_tx_timecode
 
		);
 
localparam [6:0] tx_spw_start              = 7'b0000000,
	   	 tx_spw_null               = 7'b0000001,
	   	 tx_spw_fct                = 7'b0000010,
	   	 tx_spw_null_c             = 7'b0000100,
	   	 tx_spw_fct_c              = 7'b0001000,
	   	 tx_spw_data_c             = 7'b0010000,
	   	 tx_spw_time_code_c        = 7'b0100000;
 
localparam [5:0] NULL     = 6'b000001,
		 FCT      = 6'b000010,
		 EOP      = 6'b000100,
		 EEP      = 6'b001000,
		 DATA     = 6'b010000,
		 TIMEC    = 6'b100000;
 
 
localparam [7:0] null_s = 8'b01110100;
localparam [2:0] fct_s  = 3'b100;
localparam [3:0] eop_s  = 4'b0101;
localparam [3:0] eep_s  = 4'b0110;
localparam [13:0] timecode_ss    = 14'b01110000000000;
 
 
 
	reg [6:0] state_tx;
	reg [6:0] next_state_tx;
 
	reg  [2:0] state_fct_send;
	reg  [2:0] next_state_fct_send;
 
	reg  [2:0] state_fct_receive;
	reg  [2:0] next_state_fct_receive;
 
	reg  [2:0] state_data_fifo;
	reg  [2:0] next_state_data_fifo;
 
	reg [13:0] timecode_s;
 
	reg [5:0]  last_type;
	reg [8:0]  txdata_flagctrl_tx_last;
	reg [8:0]  tx_data_in;
	reg [8:0]  tx_data_took;
 
 
	reg [7:0]  last_timein_control_flag_tx;
	reg [7:0]  tx_tcode_in;
	reg tcode_rdy_trnsp;
 
	reg [2:0] fct_send;
	reg [2:0] fct_flag;
 
	reg [5:0] fct_counter_receive;
 
	reg data_ready_took;
	reg block_decrement;
	reg char_sent;
 
	reg fct_sent;
 
	reg last_tx_dout;
	reg last_tx_sout;
 
	reg tx_dout;
	reg tx_sout;
 
	reg tx_dout_null;
	reg tx_dout_fct;
	reg tx_dout_timecode;
	reg tx_dout_data;
 
	reg [3:0] global_counter_transfer; 
 
 
 
always@(*)
begin
		tx_dout = last_tx_dout;
 
		case(state_tx)
		tx_spw_start:
		begin
		end
		tx_spw_null,tx_spw_null_c:
		begin
			 if(last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(null_s[6]^null_s[0]^null_s[1]);
			 end
			 else if(last_type == FCT  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(null_s[6]^fct_s[0]^fct_s[1]);
			 end
			 else if(last_type == EOP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(null_s[6]^eop_s[0]^eop_s[1]);
			 end
			 else if(last_type == EEP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(null_s[6]^eep_s[0]^eep_s[1]);
			 end
			 else if(last_type == DATA  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout =  !(null_s[6]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if(last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout =  !(null_s[6]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if(global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = null_s[6];
			 end
			 else if(global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = null_s[5];
			 end
			 else if(global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = null_s[4];
			 end
			 else if(global_counter_transfer[3:0] == 4'd4)
			 begin
				tx_dout = null_s[3];
			 end
			 else if(global_counter_transfer[3:0] == 4'd5)
			 begin
				tx_dout = null_s[2];
			 end
			 else if(global_counter_transfer[3:0] == 4'd6)
			 begin
				tx_dout = null_s[1];
			 end
			 else if(global_counter_transfer[3:0] == 4'd7)
			 begin
				tx_dout = null_s[0];
			 end
		end
		tx_spw_fct,tx_spw_fct_c:
		begin
			 if(last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^null_s[0]^null_s[1]);
			 end
			 else if(last_type == FCT  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^fct_s[0]^fct_s[1]);
			 end
			 else if(last_type == EOP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^eop_s[0]^eop_s[1]);
			 end
			 else if(last_type == EEP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^eep_s[0]^eep_s[1]);
			 end
			 else if (last_type == DATA && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if(last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(fct_s[2]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if(global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = fct_s[2];
			 end
			 else if(global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = fct_s[1];
			 end
			 else if(global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = fct_s[0];
			 end
		end
	   	tx_spw_data_c:
		begin
			if(!tx_data_in[8] && last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^null_s[0]^null_s[1]);
			 end
			 else if(!tx_data_in[8] && last_type == FCT && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^fct_s[0]^fct_s[1]);
			 end
			 else if(!tx_data_in[8] && last_type == EOP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^eop_s[0]^eop_s[1]);
			 end
			 else if(!tx_data_in[8] && last_type == EEP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^eep_s[0]^eep_s[1]);
			 end
			 else if(!tx_data_in[8] && last_type == DATA  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if(!tx_data_in[8] && last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(tx_data_in[8]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if(tx_data_in[8]  && tx_data_in[1:0] == 2'b00 && last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^null_s[0]^null_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && last_type == FCT   && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^fct_s[0]^fct_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && last_type == EOP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^eop_s[0]^eop_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && last_type == EEP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^eep_s[0]^eep_s[1]);
			 end
			 else if(tx_data_in[8]  && tx_data_in[1:0] == 2'b00 && last_type == DATA  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if(tx_data_in[8]  && tx_data_in[1:0] == 2'b00 && last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eop_s[2]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^null_s[0]^null_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && last_type == FCT  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^fct_s[0]^fct_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && last_type == EOP  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^eop_s[0]^eop_s[1]);
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && last_type == EEP && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^eep_s[0]^eep_s[1]);
			 end
			 else if(tx_data_in[8]  && tx_data_in[1:0] == 2'b01 && last_type == DATA && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if(tx_data_in[8]  &&  tx_data_in[1:0] == 2'b01 && last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(eep_s[2]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if(!tx_data_in[8] &&  global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = tx_data_in[8];
			 end
			 else if(!tx_data_in[8] && global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = tx_data_in[0];
			 end
			 else if(!tx_data_in[8] &&  global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = tx_data_in[1];
			 end
			 else if(!tx_data_in[8] && global_counter_transfer[3:0] == 4'd4)
			 begin
				tx_dout = tx_data_in[2];
			 end
			 else if(!tx_data_in[8]  && global_counter_transfer[3:0] == 4'd5)
			 begin
				tx_dout = tx_data_in[3];
			 end
			 else if(!tx_data_in[8]  && global_counter_transfer[3:0] == 4'd6)
			 begin
				tx_dout = tx_data_in[4];
			 end
			 else if(!tx_data_in[8]  && global_counter_transfer[3:0] == 4'd7)
			 begin
				tx_dout = tx_data_in[5];
			 end
			 else if(!tx_data_in[8] &&  global_counter_transfer[3:0] == 4'd8)
			 begin
				tx_dout = tx_data_in[6];
			 end
			 else if(!tx_data_in[8] &&  global_counter_transfer[3:0] == 4'd9)
			 begin
				tx_dout = tx_data_in[7];
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = eep_s[2];
			 end
			 else if( tx_data_in[8] && tx_data_in[1:0] == 2'b01 && global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = eep_s[1];
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b01 && global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = eep_s[0];
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = eop_s[2];
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = eop_s[1];
			 end
			 else if(tx_data_in[8] && tx_data_in[1:0] == 2'b00 && global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = eop_s[0];
			 end
		end
	   	tx_spw_time_code_c:
		begin
			 if(last_type == NULL  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^null_s[0]^null_s[1]);
			 end
			 else if(last_type == FCT   && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^fct_s[0]^fct_s[1]);
			 end
			 else if (last_type == EOP   && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^eop_s[0]^eop_s[1]);
			 end
			 else if( last_type == EEP   && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^eep_s[0]^eep_s[1]);
			 end
			 else if( last_type == DATA  && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^txdata_flagctrl_tx_last[0]^txdata_flagctrl_tx_last[1]^txdata_flagctrl_tx_last[2]^txdata_flagctrl_tx_last[3]^ txdata_flagctrl_tx_last[4]^txdata_flagctrl_tx_last[5]^txdata_flagctrl_tx_last[6]^txdata_flagctrl_tx_last[7]);
			 end
			 else if( last_type == TIMEC && global_counter_transfer[3:0] == 4'd0)
			 begin
				tx_dout = !(timecode_s[12]^last_timein_control_flag_tx[7]^last_timein_control_flag_tx[6]^last_timein_control_flag_tx[5]^last_timein_control_flag_tx[4]^last_timein_control_flag_tx[3]^last_timein_control_flag_tx[2]^last_timein_control_flag_tx[1]^last_timein_control_flag_tx[0]);
			 end
			 else if( global_counter_transfer[3:0] == 4'd1)
			 begin
				tx_dout = timecode_s[12];
			 end
			 else if( global_counter_transfer[3:0] == 4'd2)
			 begin
				tx_dout = timecode_s[11];
			 end
			 else if( global_counter_transfer[3:0] == 4'd3)
			 begin
				tx_dout = timecode_s[10];
			 end
			 else if( global_counter_transfer[3:0] == 4'd4)
			 begin
				tx_dout = timecode_s[9];
			 end
			 else if( global_counter_transfer[3:0] == 4'd5)
			 begin
				tx_dout = timecode_s[8];
			 end
			 else if( global_counter_transfer[3:0] == 4'd6)
			 begin
				tx_dout = timecode_s[0];
			 end
			 else if( global_counter_transfer[3:0] == 4'd7)
			 begin
				tx_dout = timecode_s[1];
			 end
			 else if( global_counter_transfer[3:0] == 4'd8)
			 begin
				tx_dout = timecode_s[2];
			 end
			 else if(global_counter_transfer[3:0] == 4'd9)
			 begin
				tx_dout = timecode_s[3];
			 end
			 else if(global_counter_transfer[3:0] == 4'd10)
			 begin
				tx_dout = timecode_s[4];
			 end
			 else if(global_counter_transfer[3:0] == 4'd11)
			 begin
				tx_dout = timecode_s[5];
			 end
			 else if( global_counter_transfer[3:0] == 4'd12)
			 begin
				tx_dout = timecode_s[6];
			 end
			 else if(global_counter_transfer[3:0] == 4'd13)
			 begin
				tx_dout = timecode_s[7];
			 end
		end
		default:
		begin
		end
		endcase
end
 
//strobe
always@(*)
begin
 
	tx_sout = last_tx_sout;
 
	if(tx_dout == last_tx_dout)
	begin
		tx_sout = !last_tx_sout;
	end
	else if(tx_dout != last_tx_dout)
	begin
		tx_sout = last_tx_sout;	
	end
end
 
always@(*)
begin
	next_state_fct_send = state_fct_send;
 
	case(state_fct_send)
	3'd0:
	begin
		if(send_fct_now)
		begin
			next_state_fct_send = 3'd1;
		end
		else if(fct_sent)
		begin
			next_state_fct_send = 3'd3;
		end
		else 
			next_state_fct_send = 3'd0;
	end
	3'd1:
	begin
		if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
		begin
			next_state_fct_send = 3'd2;
		end
		else 
		begin
			next_state_fct_send = 3'd1;
		end
	end
	3'd2:
	begin
		if(send_fct_now)
		begin
			next_state_fct_send = 3'd2;
		end
		else 
		begin
			next_state_fct_send = 3'd0;
		end
	end
	3'd3:
	begin
		if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
		begin
			next_state_fct_send = 3'd4;
		end
		else 
		begin
			next_state_fct_send = 3'd3;
		end
	end
	3'd4:
	begin
		if(fct_sent)
		begin
			next_state_fct_send = 3'd4;
		end
		else 
		begin
			next_state_fct_send = 3'd0;
		end
	end
	default:
	begin
		next_state_fct_send = 3'd0;
	end
	endcase
end
 
always@(posedge pclk_tx or negedge enable_tx)
begin
	if(!enable_tx)
	begin
		fct_flag <= 3'd7;
		state_fct_send<= 3'd0;
	end
	else
	begin
		state_fct_send <= next_state_fct_send;
 
		case(state_fct_send)
		3'd0:
		begin
			fct_flag <= fct_flag;
		end
		3'd1:
		begin
			if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
				fct_flag <= fct_flag + 3'd1;
			else
				fct_flag <= fct_flag;
		end
		3'd2:
		begin
			fct_flag <= fct_flag;
		end
		3'd3:
		begin
			if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
				fct_flag <= fct_flag - 3'd1;
			else
				fct_flag <= fct_flag;
		end
		3'd4:
		begin
			fct_flag <= fct_flag;
		end
		default:
		begin
			fct_flag <= fct_flag;
		end
		endcase
	end
end
 
 
always@(*)
begin
	next_state_fct_receive = state_fct_receive;
 
	case(state_fct_receive)
	3'd0:
	begin
		if(gotfct_tx)
		begin
			next_state_fct_receive = 3'd1;
		end
		else if(char_sent)
		begin
			next_state_fct_receive = 3'd3;
		end
		else 
			next_state_fct_receive = 3'd0;
	end
	3'd1:
	begin
		if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
		begin
			next_state_fct_receive = 3'd2;
		end
		else 
		begin
			next_state_fct_receive = 3'd1;
		end
	end
	3'd2:
	begin
		if(gotfct_tx)
		begin
			next_state_fct_receive = 3'd2;
		end
		else 
		begin
			next_state_fct_receive = 3'd0;
		end
	end
	3'd3:
	begin
		if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
		begin
			next_state_fct_receive = 3'd4;
		end
		else 
		begin
			next_state_fct_receive = 3'd3;
		end
	end
	3'd4:
	begin
		if(char_sent)
		begin
			next_state_fct_receive = 3'd4;
		end
		else 
		begin
			next_state_fct_receive = 3'd0;
		end
	end
	default:
	begin
		next_state_fct_receive = 3'd0;
	end
	endcase
end
 
 
always@(posedge pclk_tx or negedge enable_tx)
begin
	if(!enable_tx)
	begin
		fct_counter_receive<= 6'd0;
		state_fct_receive <= 3'd0;
	end
	else
	begin
 
		state_fct_receive <= next_state_fct_receive;
 
		case(state_fct_receive)
		3'd0:
		begin
			fct_counter_receive <= fct_counter_receive;
		end
		3'd1:
		begin
			if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
			begin
				if(fct_counter_receive < 6'd48) 
				begin
					fct_counter_receive <= fct_counter_receive + 6'd8;
				end
				else
				begin
					fct_counter_receive <= fct_counter_receive + 6'd7;
				end
			end
			else
				fct_counter_receive <= fct_counter_receive;
		end
		3'd2:
		begin
			fct_counter_receive <= fct_counter_receive;
		end
		3'd3:
		begin
			if(global_counter_transfer > 4'd0 &&  global_counter_transfer < 4'd12)
			begin
				if(fct_counter_receive == 6'd0)
					fct_counter_receive <= fct_counter_receive;
				else
					fct_counter_receive <= fct_counter_receive - 6'd1;
			end
			else
				fct_counter_receive <= fct_counter_receive;
		end
		3'd4:
		begin
			fct_counter_receive <= fct_counter_receive;
		end
		default:
		begin
			fct_counter_receive <= fct_counter_receive;
		end
		endcase
	end
end
 
 
always@(*)
begin
	next_state_data_fifo = state_data_fifo;
 
	case(state_data_fifo)
	3'd0:
	begin
		if(!ready_tx_data && txwrite_tx)
		begin
			next_state_data_fifo = 3'd1;
		end
		else 
			next_state_data_fifo = 3'd0;
	end
	3'd1:
	begin
		next_state_data_fifo = 3'd2;
	end
	3'd2:
	begin
 
		if(state_tx == tx_spw_null_c && global_counter_transfer > 4'd1 && global_counter_transfer < 4'd7)
			next_state_data_fifo = 3'd3;
		else if(state_tx == tx_spw_data_c && global_counter_transfer > 4'd1 && global_counter_transfer < 4'd9)
			next_state_data_fifo = 3'd3;
		else
			next_state_data_fifo = 3'd2;
	end
	3'd3:
	begin
		if(!ready_tx_data && txwrite_tx)
		begin
			next_state_data_fifo = 3'd3;
		end
		else 
		begin
			next_state_data_fifo = 3'd0;
		end
	end
	default:
	begin
		next_state_data_fifo = 3'd0;
	end
	endcase
end
 
always@(posedge pclk_tx or negedge enable_tx)
begin
	if(!enable_tx)
	begin
		data_ready_took <= 1'b0;
		state_data_fifo <= 3'd0;
		tx_data_took <= 9'd0;
	end
	else
	begin
 
		state_data_fifo <= next_state_data_fifo;
 
		case(state_data_fifo)
		3'd0:
		begin
			//tx_data_took <= tx_data_took;
		end
		3'd1:
		begin
			tx_data_took <= data_tx_i;
		end
		3'd2:
		begin
			tx_data_took <= data_tx_i;
 
			if(state_tx == tx_spw_null_c && global_counter_transfer > 4'd0 && global_counter_transfer < 4'd7)
				data_ready_took <= 1'b1;
			else if(state_tx == tx_spw_data_c && global_counter_transfer > 4'd0 && global_counter_transfer < 4'd9)
				data_ready_took <= 1'b1;
			else
				data_ready_took <= 1'b0;
		end
		3'd3:
		begin
			if(!ready_tx_data && txwrite_tx)
			begin
				data_ready_took <= 1'b1;
			end
			else 
			begin
				data_ready_took <= 1'b0;
			end
		end
		default:
		begin
		end
		endcase
	end
end
 
always@(*)
begin
	next_state_tx = state_tx;
 
	case(state_tx)
	tx_spw_start:
	begin
		if(send_null_tx && enable_tx)
		begin
			next_state_tx = tx_spw_null;	
		end
		else
		begin
			next_state_tx = tx_spw_start;
		end
	end
	tx_spw_null:
	begin
		if(send_null_tx && send_fct_tx && enable_tx)
		begin
			if(global_counter_transfer == 4'd7)
				next_state_tx = tx_spw_fct;
			else
				next_state_tx = tx_spw_null;
		end
		else
			next_state_tx = tx_spw_null;
	end
	tx_spw_fct:
	begin
		if(send_fct_tx && global_counter_transfer == 4'd3)
		begin
			if(tickin_tx && !ready_tx_timecode && tcode_rdy_trnsp)
			begin
				next_state_tx = tx_spw_time_code_c;
			end 
			else if(fct_flag > 3'd0 && !send_fct_now)
			begin
				next_state_tx = tx_spw_fct;
			end
			else 
			begin
				next_state_tx = tx_spw_null_c;
			end
		end
		else
		  	next_state_tx = tx_spw_fct;
	end
	tx_spw_null_c:
	begin
		if(global_counter_transfer == 4'd7)
		begin
			if(tickin_tx && !ready_tx_timecode && tcode_rdy_trnsp)
			begin
				next_state_tx = tx_spw_time_code_c;
			end 
			else if(fct_flag > 3'd0 && !send_fct_now)
			begin
				next_state_tx = tx_spw_fct_c;
			end
			else if(data_ready_took && !gotfct_tx && fct_counter_receive > 6'd0)
			begin
				next_state_tx = tx_spw_data_c;				
			end
			else 
			begin
				next_state_tx = tx_spw_null_c;
			end
		end
		else
		begin
			next_state_tx = tx_spw_null_c;
		end
	end
	tx_spw_fct_c:
	begin
		if(global_counter_transfer == 4'd3)
		begin
			if(tickin_tx && !ready_tx_timecode && tcode_rdy_trnsp)
			begin
				next_state_tx = tx_spw_time_code_c;
			end 
			else 
			begin
				next_state_tx = tx_spw_null_c;
			end
		end
		else
		begin
			next_state_tx = tx_spw_fct_c;
		end
	end
	tx_spw_data_c:
	begin
 
		if(!tx_data_in[8])
		begin
			if(global_counter_transfer == 4'd9)
			begin
				if(tickin_tx && !ready_tx_timecode && tcode_rdy_trnsp)
				begin
					next_state_tx = tx_spw_time_code_c;
				end 
				else if(fct_flag > 3'd0 && !send_fct_now)
				begin
					next_state_tx = tx_spw_fct_c;
				end
				else if(data_ready_took && !gotfct_tx && fct_counter_receive > 6'd0)
				begin
					next_state_tx = tx_spw_data_c;				
				end
				else 
				begin
					next_state_tx = tx_spw_null_c;
				end
			end
			else
				next_state_tx = tx_spw_data_c;			
		end
		else if(tx_data_in[8])
		begin
			if(global_counter_transfer == 4'd3)
			begin
				if(tickin_tx && !ready_tx_timecode && tcode_rdy_trnsp)
				begin
					next_state_tx = tx_spw_time_code_c;
				end 
				else if(fct_flag > 3'd0 && !send_fct_now)
				begin
					next_state_tx = tx_spw_fct_c;
				end
				else 
				begin
					next_state_tx = tx_spw_null_c;
				end
			end
			else
				next_state_tx = tx_spw_data_c;	
		end
 
 
	end
	tx_spw_time_code_c:
	begin
		if(global_counter_transfer == 4'd13)
		begin
			if(fct_flag > 3'd0 && !send_fct_now)
			begin
				next_state_tx = tx_spw_fct_c;
			end
			else if(data_ready_took && !gotfct_tx && fct_counter_receive > 6'd0 )
			begin
				next_state_tx = tx_spw_data_c;				
			end
			else 
			begin
				next_state_tx = tx_spw_null_c;
			end
		end
		else
		begin
			next_state_tx = tx_spw_time_code_c;
		end
	end
	default:
	begin
		next_state_tx = tx_spw_start;
	end
	endcase
end
 
 
always@(posedge pclk_tx or negedge enable_tx)
begin
	if(!enable_tx)
	begin
 
		timecode_s    <= 14'b01110000000000;	
 
		ready_tx_data	  <= 1'b0;
		ready_tx_timecode <= 1'b0;
 
		last_type  <= NULL;
 
		global_counter_transfer <= 4'd0;
		txdata_flagctrl_tx_last <= 9'd0; 
		tx_data_in <= 9'd0;
		last_timein_control_flag_tx <= 8'd0;
 
		char_sent<= 1'b0;
		fct_sent <= 1'b0;
 
		last_tx_dout      <= 1'b0;
		last_tx_sout 	  <= 1'b0;
 
		state_tx <= tx_spw_start;
 
		tx_dout_e <= 1'b0;
		tx_sout_e <= 1'b0;
 
		tx_tcode_in     <= 8'd0;
		tcode_rdy_trnsp <= 1'b0;
 
	end
	else
	begin
		state_tx <= next_state_tx;
 
		case(state_tx)
		tx_spw_start:
		begin
			global_counter_transfer <= 4'd0;
		end
		tx_spw_null:
		begin
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
 
  			if(tickin_tx && global_counter_transfer == 4'd5)
			begin
				tx_tcode_in <= timecode_tx_i;
				tcode_rdy_trnsp <= 1'b1;
			end
			else
				tx_tcode_in <= tx_tcode_in;
 
 
			if(global_counter_transfer == 4'd7)
			begin
				last_type  <= NULL;
				global_counter_transfer <= 4'd0;
			end
			else 
			begin
				last_type  <= last_type;
				global_counter_transfer <= global_counter_transfer + 4'd1;
			end
		end
		tx_spw_fct:
		begin
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
			if(global_counter_transfer == 4'd3)
			begin
				last_type  <=FCT;
				global_counter_transfer <= 4'd0;
				fct_sent <= 1'b0;
			end
			else
			begin
				if(fct_flag > 3'd0)
					fct_sent <=  1'b1;
				else
					fct_sent <= fct_sent;
 
				global_counter_transfer <= global_counter_transfer + 4'd1;
			end
		end
		tx_spw_null_c:
		begin
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
			if(global_counter_transfer == 4'd7)
			begin
				last_type  <= NULL;
				global_counter_transfer <= 4'd0;
 
				if(data_ready_took)
					tx_data_in <= tx_data_took;
				else
					tx_data_in <= tx_data_in;
			end
			else
			begin
				char_sent <= 1'b0;
				fct_sent <=  1'b0;
				ready_tx_timecode <= 1'b0;
				last_type  <= last_type;
				global_counter_transfer <= global_counter_transfer + 4'd1;
			end
		end
		tx_spw_fct_c:
		begin
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
			if(global_counter_transfer == 4'd3)
			begin		
				char_sent <= 1'b0;	
				last_type  <=FCT;
				fct_sent <=  1'b0;
				global_counter_transfer <= 4'd0;
			end
			else
			begin
				if(fct_flag > 3'd0)
					fct_sent <=  1'b1;
				else
					fct_sent <= fct_sent;
 
				global_counter_transfer <= global_counter_transfer + 4'd1;
			end
		end
		tx_spw_data_c:
		begin
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
			fct_sent <=  1'b0;
 
			if(!tx_data_in[8])
			begin
 
				if(global_counter_transfer == 4'd9)
				begin
					char_sent <= 1'b1;
					last_type  <= DATA;
					global_counter_transfer <= 4'd0;
 
					if(data_ready_took)
						tx_data_in <= tx_data_took;
					else
						tx_data_in <= tx_data_in;
				end
				else
				begin
 
					if(global_counter_transfer == 4'd1)
					begin
						txdata_flagctrl_tx_last <= tx_data_in;
					end
					else
						txdata_flagctrl_tx_last <= txdata_flagctrl_tx_last;
 
 
					if(global_counter_transfer >= 4'd2 && global_counter_transfer < 4'd5)
					begin
						ready_tx_data <= 1'b1;
					end
					else
						ready_tx_data <= 1'b0;
 
					char_sent <= 1'b0;
					ready_tx_timecode <= 1'b0;
					global_counter_transfer <= global_counter_transfer + 4'd1;
 
				 end
 
			end
			else if(tx_data_in[8])
			begin
 
				if(global_counter_transfer == 4'd3)
				begin
					char_sent <= 1'b1;
 
					if(tx_data_in[1:0] == 2'b00)
					begin
						last_type  <=EOP;
					end
					else if(tx_data_in[1:0] == 2'b01)
					begin
						last_type  <=EEP;
					end
 
					ready_tx_data <= 1'b0;
					global_counter_transfer <= 4'd0;
				end
				else
				begin
					txdata_flagctrl_tx_last <= txdata_flagctrl_tx_last;
					ready_tx_data <= 1'b1;
					ready_tx_timecode <= 1'b0;
					global_counter_transfer <= global_counter_transfer + 4'd1;
				end
			end
 
		end
		tx_spw_time_code_c:
		begin
 
			fct_sent <=  1'b0;
 
			last_tx_dout <= tx_dout;
			last_tx_sout <= tx_sout;
 
			tx_dout_e <= last_tx_dout;
			tx_sout_e <= last_tx_sout;
 
			if(global_counter_transfer == 4'd13)
			begin
				ready_tx_timecode <= 1'b1;
				global_counter_transfer <= 4'd0;
			end
			else
			begin
				ready_tx_timecode <= 1'b0;
				global_counter_transfer <= global_counter_transfer + 4'd1;
			end
 
 
			if(global_counter_transfer != 4'd13)
			begin
 
				timecode_s <= {timecode_ss[13:10],2'd2,tx_tcode_in[7:0]};
			end
			else
			begin
				last_timein_control_flag_tx <= tx_tcode_in;
				last_type  <= TIMEC;
			end
 
		end
		default:
		begin
			last_type  		<= last_type;
			global_counter_transfer <= global_counter_transfer;
			tx_dout_e 		<= tx_dout_e;
			tx_sout_e 		<= tx_sout_e;
		end
		endcase
	end
end
 
endmodule