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//+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------------------------------------------------------------------------
module detector_tokens(
                                                                input  rx_din,
                                                                input  rx_sin,
                                                                input  rx_resetn,
                                                                //input clock_sys,
                                                                output reg rx_buffer_write,
                                                                output reg [13:0] info
                                                         );
 
        reg rx_error;
        wire rx_got_bit;
        reg rx_got_null;
        reg rx_got_nchar;
        reg rx_got_time_code;
        reg rx_got_fct;
 
        reg  [4:0] counter_neg;
        //reg  [3:0] counter_control;
        //reg  [3:0] counter_data;
        //reg  [5:0] counter_bit_found;
        reg control_bit_found;
 
        wire posedge_clk;
        wire negedge_clk;
 
        reg bit_c_0;//N
        reg bit_c_1;//P
        reg bit_c_2;//N
        reg bit_c_3;//P
        reg bit_c_ex;//P
 
        reg bit_d_0;//N
        reg bit_d_1;//P
        reg bit_d_2;//N
        reg bit_d_3;//P
        reg bit_d_4;//N
        reg bit_d_5;//P
        reg bit_d_6;//N
        reg bit_d_7;//P
        reg bit_d_8;//N
        reg bit_d_9;//P
        //reg bit_d_ex;//P
 
        reg is_control;
        reg is_data;
 
        reg last_is_control;
        reg last_is_data;
        reg last_is_timec;
 
        reg last_was_control;
        reg last_was_data;
        reg last_was_timec;
 
        reg [3:0] control;
        reg [3:0] control_r;
        reg [9:0] data;
        reg [9:0] timecode;
 
        reg [9:0] dta_timec;
 
        reg [3:0] control_l_r;
        reg [9:0] data_l_r;
 
        //reg parity_error;
        //wire check_c_d;
 
        reg rx_data_take;
        reg rx_data_take_0;
 
        //wire [13:0] info_w;
        reg first_time;
 
        wire ready_control;
        wire ready_data;
 
 
        //CLOCK RECOVERY
        assign posedge_clk      = (rx_din ^ rx_sin)?1'b1:1'b0;
        assign negedge_clk      = (!first_time)?1'b0:(!(rx_din ^ rx_sin))?1'b1:1'b0;
 
        assign rx_got_bit       = (posedge_clk)?1'b1:1'b0;
 
        assign ready_control    = is_control;
        assign ready_data       = (counter_neg == 5'd5)?is_data:1'b0;
 
always@(posedge posedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                bit_d_1 <= 1'b0;
                bit_d_3 <= 1'b0;
                bit_d_5 <= 1'b0;
                bit_d_7 <= 1'b0;
                bit_d_9 <= 1'b0;
                first_time <= 1'b0;
        end
        else
        begin
                bit_d_1    <= rx_din;
                bit_d_3    <= bit_d_1;
                bit_d_5    <= bit_d_3;
                bit_d_7    <= bit_d_5;
                bit_d_9    <= bit_d_7;
                first_time <= 1'b1;
 
        end
 
end
 
always@(posedge posedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                bit_c_1   <= 1'b0;
                bit_c_3   <= 1'b0;
                bit_c_ex  <= 1'b0;
        end
        else
        begin
                bit_c_1 <= rx_din;
                bit_c_3 <= bit_c_1;
                bit_c_ex <= bit_c_3;
        end
 
end
 
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                bit_d_0 <= 1'b0;
                bit_d_2 <= 1'b0;
                bit_d_4 <= 1'b0;
                bit_d_6 <= 1'b0;
                bit_d_8 <= 1'b0;
        end
        else
        begin
                bit_d_0 <= rx_din;
                bit_d_2 <= bit_d_0;
                bit_d_4 <= bit_d_2;
                bit_d_6 <= bit_d_4;
                bit_d_8 <= bit_d_6;
        end
end
 
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                bit_c_0 <= 1'b0;
                bit_c_2 <= 1'b0;
        end
        else
        begin
 
                bit_c_0 <= rx_din;
                bit_c_2 <= bit_c_0;
        end
end
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                is_control <= 1'b0;
                is_data    <= 1'b0;
                control_bit_found <= 1'b0;
                counter_neg <= 5'd0;
        end
        else
        begin
                if(counter_neg == 5'd0)
                begin
                        control_bit_found <= rx_din;
                        is_control  <= 1'b0;
                        is_data     <= 1'b0;
                        counter_neg <= counter_neg + 5'd1;
                end
                else if(counter_neg == 5'd1 && control_bit_found)
                begin
                        is_control <= 1'b1;
                        is_data    <= 1'b0;
                        counter_neg <= counter_neg + 5'd1;
                end
                else if(counter_neg == 5'd1 && !control_bit_found)
                begin
                        is_control <= 1'b0;
                        is_data    <= 1'b1;
                        counter_neg <= counter_neg + 5'd1;
                end
                else
                begin
 
                        if(is_control)
                        begin
                                control_bit_found <= rx_din;
 
                                if(counter_neg == 5'd2)
                                begin
                                        counter_neg <= 5'd1;
                                        is_control  <= 1'b0;
                                        is_data     <= 1'b0;
                                end
                        end
                        else if(is_data)
                        begin
                                if(counter_neg == 5'd5)
                                begin
                                        control_bit_found <= rx_din;
                                        counter_neg <= 5'd1;
                                        is_data     <= 1'b0;
                                        is_control  <= 1'b0;
                                end
                                else
                                        counter_neg <= counter_neg + 5'd1;
                        end
                end
 
        end
end
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
 
        if(!rx_resetn)
        begin
                rx_error <= 1'b0;
        end
        else
        begin
                if(last_is_control)
                begin
                        if(last_was_control)
                        begin
                                if(!(control[2]^control_l_r[0]^control_l_r[1]) != control[3])
                                begin
                                        rx_error <= 1'b1;
                                end
                        end
                        else if(last_was_timec)
                        begin
                                if(!(control[2]^timecode[0]^timecode[1]^timecode[2]^timecode[3]^timecode[4]^timecode[5]^timecode[6]^timecode[7])  != control[3])
                                begin
                                        rx_error <= 1'b1;
                                end
                        end
                        else if(last_was_data)
                        begin
                                if(!(control[2]^data[0]^data[1]^data[2]^data[3]^data[4]^data[5]^data[6]^data[7]) != control[3])
                                begin
                                                rx_error <= 1'b1;
                                end
                        end
 
                        end
                        else if(last_is_data)
                        begin
                                if(last_was_control)
                                begin
                                        if(!(data[8]^control[1]^control[0]) != data[9])
                                        begin
                                                rx_error <= 1'b1;
                                        end
                                end
                                else if(last_was_timec)
                                begin
                                        if(!(data[8]^timecode[0]^timecode[1]^timecode[2]^timecode[3]^timecode[4]^timecode[5]^timecode[6]^timecode[7])  != data[9])
                                        begin
                                                rx_error <= 1'b1;
                                        end
                                end
                                else if(last_was_data)
                                begin
                                        if(!(data[8]^data[0]^data_l_r[1]^data_l_r[2]^data_l_r[3]^data_l_r[4]^data_l_r[5]^data_l_r[6]^data_l_r[7]) != data[9])
                                        begin
                                                rx_error <= 1'b1;
                                        end
                                end
                        end
                end
 
end
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
        if(!rx_resetn)
        begin
                rx_got_null       <= 1'b0;
                rx_got_nchar      <= 1'b0;
                rx_got_time_code  <= 1'b0;
                rx_got_fct        <= 1'b0;
        end
        else
        begin
                if(control_l_r[2:0] != 3'd7 && control[2:0] == 3'd4 && last_is_control)
                begin
                        rx_got_fct        <= 1'b1;
                        rx_got_null       <= 1'b0;
                        rx_got_nchar      <= 1'b0;
                        rx_got_time_code  <= 1'b0;
                end
                else if(control[2:0] != 3'd7 && last_is_data)
                begin
                        rx_got_nchar      <= 1'b1;
                        rx_got_null       <= 1'b0;
                        rx_got_time_code  <= 1'b0;
                        rx_got_fct        <= 1'b0;
                end
                else if(control[2:0] == 3'd7 && last_is_data)
                begin
                        rx_got_time_code  <= 1'b1;
                        rx_got_null       <= 1'b0;
                        rx_got_nchar      <= 1'b0;
                        rx_got_fct        <= 1'b0;
                end
                else if(control_l_r[2:0] == 3'd7 && control[2:0] == 3'd4 && last_is_control)
                begin
                        rx_got_null       <= 1'b1;
                        rx_got_nchar      <= 1'b0;
                        rx_got_time_code  <= 1'b0;
                        rx_got_fct        <= 1'b0;
                end
                else
                begin
                        rx_got_null       <= rx_got_null;
                        rx_got_nchar      <= rx_got_nchar;
                        rx_got_time_code  <= rx_got_time_code;
                        rx_got_fct        <= rx_got_fct;
                end
        end
end
 
 
always@(posedge negedge_clk or negedge rx_resetn)
begin
        if(!rx_resetn)
        begin
                rx_buffer_write <=  1'b0;
                rx_data_take_0  <=  1'b0;
        end
        else
        begin
                rx_data_take_0 <= rx_data_take;
                rx_buffer_write  <= rx_data_take_0;
        end
end
 
always@(posedge ready_control or negedge rx_resetn )
begin
        if(!rx_resetn)
        begin
                control_r               <= 4'd0;
        end
        else
        begin
                if(counter_neg == 5'd2)
                        control_r         <= {bit_c_3,bit_c_2,bit_c_1,bit_c_0};
                else if(counter_neg == 5'd1 && control == 4'd7)
                        control_r         <= {bit_c_ex,bit_c_2,bit_c_3,bit_c_0};
                else
                        control_r         <= control_r;
        end
end
 
always@(posedge ready_data or negedge rx_resetn )
begin
        if(!rx_resetn)
        begin
                dta_timec               <= 10'd0;
        end
        else
        begin
                if(counter_neg == 5'd5)
                        dta_timec         <= {bit_d_9,bit_d_8,bit_d_0,bit_d_1,bit_d_2,bit_d_3,bit_d_4,bit_d_5,bit_d_6,bit_d_7};
                else
                        dta_timec         <= dta_timec;
        end
end
 
always@(posedge posedge_clk or negedge rx_resetn )
begin
 
        if(!rx_resetn)
        begin
                control     <= 4'd0;
                control_l_r <= 4'd0;
 
                data            <= 10'd0;
                data_l_r        <= 10'd0;
                //rx_data_flag    <= 9'd0; 
                //rx_buffer_write <= 1'b0;
                //rx_data_take    <= 1'b0;
 
                timecode    <= 10'd0;
        //      rx_time_out <= 8'd0;
        //      rx_tick_out <= 1'b0;
 
                last_is_control <=1'b0;
                last_is_data    <=1'b0;
                last_is_timec   <=1'b0;
 
                last_was_control <=1'b0;
                last_was_data    <=1'b0;
                last_was_timec   <=1'b0;
 
                info             <= 14'd0;
                //rx_error       <= 1'b0;
                //rx_got_null    <= 1'b0;
                //rx_got_nchar   <= 1'b0;
                //rx_got_time_code <= 1'b0;
                //rx_got_fct     <= 1'b0;
 
                //meta_hold_setup    <= 1'b0;
                //meta_hold_setup_n  <= 1'b0;
                //meta_hold_setup_n_n<= 1'b0;
 
        end
        else
        begin
 
                //meta_hold_setup_n_n <= meta_hold_setup;
                //meta_hold_setup_n   <= meta_hold_setup_n_n; 
 
                if(ready_control)
                begin
                        control          <= control_r;
                        control_l_r      <= control;
 
                        last_is_control          <= 1'b1;
                        last_is_data             <= 1'b0;
                        last_is_timec            <= 1'b0;
                        last_was_control         <= last_is_control;
                        last_was_data            <= last_is_data ;
                        last_was_timec           <= last_is_timec;
 
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
 
                end
                else if(ready_data)
                begin
                        if(control[2:0] != 3'd7)
                        begin
                                data            <= dta_timec;
                                last_is_control         <=1'b0;
                                last_is_data            <=1'b1;
                                last_is_timec           <=1'b0;
                                last_was_control        <= last_is_control;
                                last_was_data           <= last_is_data ;
                                last_was_timec          <= last_is_timec;
                        end
                        else if(control[2:0] == 3'd7)
                        begin
                                timecode        <= dta_timec;
                                last_is_control         <= 1'b0;
                                last_is_data            <= 1'b0;
                                last_is_timec           <= 1'b1;
                                last_was_control        <= last_is_control;
                                last_was_data           <= last_is_data ;
                                last_was_timec          <= last_is_timec;
                        end
 
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
                end
                else if(last_is_data)
                begin
 
                        data_l_r                <= data;
 
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
 
                        rx_data_take <= 1'b1;
                        //rx_tick_out  <= 1'b0;
 
                        //meta_hold_setup  <= 1'b0;
                end
                else if(last_is_timec)
                begin
                        //rx_tick_out  <= 1'b1;
                        rx_data_take <= 1'b1;
 
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
 
                        //meta_hold_setup  <= 1'b0;
                end
                else if(last_is_control)
                begin
 
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
 
                        rx_data_take    <= 1'b0;
 
                        if((control[2:0] == 3'd6) == 1'b1 )
                        begin
                                data <= 10'b0100000001;
                        end
                        else if(  (control[2:0] == 3'd5 ) == 1'b1 )
                        begin
                                data <= 10'b0100000000;
                        end
 
                end
                else
                        info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};
 
        end
end
 
endmodule

Line No.	Rev	Author	Line
1	23	redbear	`//+FHDR------------------------------------------------------------------------`
2			`//Copyright (c) 2013 Latin Group American Integhrated Circuit, Inc. All rights reserved`
3			`//GLADIC Open Source RTL`
4			`//-----------------------------------------------------------------------------`
5			`//FILE NAME :`
6			`//DEPARTMENT : IC Design / Verification`
7			`//AUTHOR : Felipe Fernandes da Costa`
8			`//AUTHOR’S EMAIL :`
9			`//-----------------------------------------------------------------------------`
10			`//RELEASE HISTORY`
11			`//VERSION DATE AUTHOR DESCRIPTION`
12			`//1.0 YYYY-MM-DD name`
13			`//-----------------------------------------------------------------------------`
14			`//KEYWORDS : General file searching keywords, leave blank if none.`
15			`//-----------------------------------------------------------------------------`
16			`//PURPOSE : ECSS_E_ST_50_12C_31_july_2008`
17			`//-----------------------------------------------------------------------------`
18			`//PARAMETERS`
19			`//PARAM NAME RANGE : DESCRIPTION : DEFAULT : UNITS`
20			`//e.g.DATA_WIDTH [32,16] : width of the DATA : 32:`
21			`//-----------------------------------------------------------------------------`
22			`//REUSE ISSUES`
23			`//Reset Strategy :`
24			`//Clock Domains :`
25			`//Critical Timing :`
26			`//Test Features :`
27			`//Asynchronous I/F :`
28			`//Scan Methodology :`
29			`//Instantiations :`
30			`//Synthesizable (y/n) :`
31			`//Other :`
32			`//-FHDR------------------------------------------------------------------------`
33			`module detector_tokens(`
34			`input rx_din,`
35			`input rx_sin,`
36			`input rx_resetn,`
37	26	redbear	`//input clock_sys,`
38			`output reg rx_buffer_write,`
39			`output reg [13:0] info`
40	23	redbear	`);`
41
42	26	redbear	`reg rx_error;`
43	23	redbear	`wire rx_got_bit;`
44	26	redbear	`reg rx_got_null;`
45			`reg rx_got_nchar;`
46			`reg rx_got_time_code;`
47	23	redbear	`reg rx_got_fct;`
48
49			`reg [4:0] counter_neg;`
50	26	redbear	`//reg [3:0] counter_control;`
51			`//reg [3:0] counter_data;`
52			`//reg [5:0] counter_bit_found;`
53			`reg control_bit_found;`
54	23	redbear
55			`wire posedge_clk;`
56			`wire negedge_clk;`
57
58			`reg bit_c_0;//N`
59			`reg bit_c_1;//P`
60			`reg bit_c_2;//N`
61			`reg bit_c_3;//P`
62	26	redbear	`reg bit_c_ex;//P`
63	23	redbear
64			`reg bit_d_0;//N`
65			`reg bit_d_1;//P`
66			`reg bit_d_2;//N`
67			`reg bit_d_3;//P`
68			`reg bit_d_4;//N`
69			`reg bit_d_5;//P`
70			`reg bit_d_6;//N`
71			`reg bit_d_7;//P`
72			`reg bit_d_8;//N`
73			`reg bit_d_9;//P`
74	26	redbear	`//reg bit_d_ex;//P`
75	23	redbear
76			`reg is_control;`
77			`reg is_data;`
78
79			`reg last_is_control;`
80			`reg last_is_data;`
81			`reg last_is_timec;`
82
83			`reg last_was_control;`
84			`reg last_was_data;`
85			`reg last_was_timec;`
86
87			`reg [3:0] control;`
88			`reg [3:0] control_r;`
89			`reg [9:0] data;`
90			`reg [9:0] timecode;`
91
92			`reg [9:0] dta_timec;`
93
94			`reg [3:0] control_l_r;`
95			`reg [9:0] data_l_r;`
96
97	26	redbear	`//reg parity_error;`
98			`//wire check_c_d;`
99	23	redbear
100			`reg rx_data_take;`
101	26	redbear	`reg rx_data_take_0;`
102	23	redbear
103	26	redbear	`//wire [13:0] info_w;`
104	23	redbear	`reg first_time;`
105
106	26	redbear	`wire ready_control;`
107			`wire ready_data;`
108
109
110	23	redbear	`//CLOCK RECOVERY`
111			`assign posedge_clk = (rx_din ^ rx_sin)?1'b1:1'b0;`
112			`assign negedge_clk = (!first_time)?1'b0:(!(rx_din ^ rx_sin))?1'b1:1'b0;`
113
114			`assign rx_got_bit = (posedge_clk)?1'b1:1'b0;`
115
116	26	redbear	`assign ready_control = is_control;`
117			`assign ready_data = (counter_neg == 5'd5)?is_data:1'b0;`
118	23	redbear
119			`always@(posedge posedge_clk or negedge rx_resetn)`
120			`begin`
121
122			`if(!rx_resetn)`
123			`begin`
124			`bit_d_1 <= 1'b0;`
125			`bit_d_3 <= 1'b0;`
126			`bit_d_5 <= 1'b0;`
127			`bit_d_7 <= 1'b0;`
128			`bit_d_9 <= 1'b0;`
129			`first_time <= 1'b0;`
130			`end`
131			`else`
132			`begin`
133	26	redbear	`bit_d_1 <= rx_din;`
134			`bit_d_3 <= bit_d_1;`
135			`bit_d_5 <= bit_d_3;`
136			`bit_d_7 <= bit_d_5;`
137			`bit_d_9 <= bit_d_7;`
138	23	redbear	`first_time <= 1'b1;`
139
140			`end`
141
142			`end`
143
144	26	redbear	`always@(posedge posedge_clk or negedge rx_resetn)`
145			`begin`
146
147			`if(!rx_resetn)`
148			`begin`
149			`bit_c_1 <= 1'b0;`
150			`bit_c_3 <= 1'b0;`
151			`bit_c_ex <= 1'b0;`
152			`end`
153			`else`
154			`begin`
155			`bit_c_1 <= rx_din;`
156			`bit_c_3 <= bit_c_1;`
157			`bit_c_ex <= bit_c_3;`
158			`end`
159
160			`end`
161
162
163	23	redbear	`always@(posedge negedge_clk or negedge rx_resetn)`
164			`begin`
165
166			`if(!rx_resetn)`
167			`begin`
168			`bit_d_0 <= 1'b0;`
169			`bit_d_2 <= 1'b0;`
170			`bit_d_4 <= 1'b0;`
171			`bit_d_6 <= 1'b0;`
172			`bit_d_8 <= 1'b0;`
173			`end`
174			`else`
175	26	redbear	`begin`
176	23	redbear	`bit_d_0 <= rx_din;`
177			`bit_d_2 <= bit_d_0;`
178			`bit_d_4 <= bit_d_2;`
179			`bit_d_6 <= bit_d_4;`
180			`bit_d_8 <= bit_d_6;`
181			`end`
182			`end`
183
184
185	26	redbear	`always@(posedge negedge_clk or negedge rx_resetn)`
186	23	redbear	`begin`
187
188	26	redbear	`if(!rx_resetn)`
189	23	redbear	`begin`
190	26	redbear	`bit_c_0 <= 1'b0;`
191			`bit_c_2 <= 1'b0;`
192	23	redbear	`end`
193	26	redbear	`else`
194	23	redbear	`begin`
195	26	redbear
196			`bit_c_0 <= rx_din;`
197			`bit_c_2 <= bit_c_0;`
198	23	redbear	`end`
199			`end`
200
201	26	redbear	`always@(posedge negedge_clk or negedge rx_resetn)`
202	23	redbear	`begin`
203
204			`if(!rx_resetn)`
205			`begin`
206			`is_control <= 1'b0;`
207			`is_data <= 1'b0;`
208	26	redbear	`control_bit_found <= 1'b0;`
209	23	redbear	`counter_neg <= 5'd0;`
210			`end`
211			`else`
212			`begin`
213	26	redbear	`if(counter_neg == 5'd0)`
214	23	redbear	`begin`
215	26	redbear	`control_bit_found <= rx_din;`
216			`is_control <= 1'b0;`
217			`is_data <= 1'b0;`
218	23	redbear	`counter_neg <= counter_neg + 5'd1;`
219			`end`
220	26	redbear	`else if(counter_neg == 5'd1 && control_bit_found)`
221			`begin`
222			`is_control <= 1'b1;`
223			`is_data <= 1'b0;`
224			`counter_neg <= counter_neg + 5'd1;`
225			`end`
226			`else if(counter_neg == 5'd1 && !control_bit_found)`
227			`begin`
228			`is_control <= 1'b0;`
229			`is_data <= 1'b1;`
230			`counter_neg <= counter_neg + 5'd1;`
231			`end`
232	23	redbear	`else`
233			`begin`
234	26	redbear
235	23	redbear	`if(is_control)`
236			`begin`
237	26	redbear	`control_bit_found <= rx_din;`
238
239	23	redbear	`if(counter_neg == 5'd2)`
240			`begin`
241			`counter_neg <= 5'd1;`
242			`is_control <= 1'b0;`
243	26	redbear	`is_data <= 1'b0;`
244	23	redbear	`end`
245			`end`
246			`else if(is_data)`
247			`begin`
248			`if(counter_neg == 5'd5)`
249			`begin`
250	26	redbear	`control_bit_found <= rx_din;`
251	23	redbear	`counter_neg <= 5'd1;`
252			`is_data <= 1'b0;`
253	26	redbear	`is_control <= 1'b0;`
254	23	redbear	`end`
255			`else`
256			`counter_neg <= counter_neg + 5'd1;`
257			`end`
258			`end`
259	26	redbear
260	23	redbear	`end`
261			`end`
262
263	26	redbear	`always@(posedge negedge_clk or negedge rx_resetn)`
264	23	redbear	`begin`
265
266	26	redbear	`if(!rx_resetn)`
267	23	redbear	`begin`
268	26	redbear	`rx_error <= 1'b0;`
269			`end`
270			`else`
271			`begin`
272			`if(last_is_control)`
273	23	redbear	`begin`
274	26	redbear	`if(last_was_control)`
275	23	redbear	`begin`
276	26	redbear	`if(!(control[2]^control_l_r[0]^control_l_r[1]) != control[3])`
277			`begin`
278			`rx_error <= 1'b1;`
279			`end`
280	23	redbear	`end`
281	26	redbear	`else if(last_was_timec)`
282	23	redbear	`begin`
283	26	redbear	`if(!(control[2]^timecode[0]^timecode[1]^timecode[2]^timecode[3]^timecode[4]^timecode[5]^timecode[6]^timecode[7]) != control[3])`
284			`begin`
285			`rx_error <= 1'b1;`
286			`end`
287	23	redbear	`end`
288	26	redbear	`else if(last_was_data)`
289	23	redbear	`begin`
290	26	redbear	`if(!(control[2]^data[0]^data[1]^data[2]^data[3]^data[4]^data[5]^data[6]^data[7]) != control[3])`
291			`begin`
292			`rx_error <= 1'b1;`
293			`end`
294	23	redbear	`end`
295	26	redbear
296			`end`
297			`else if(last_is_data)`
298			`begin`
299			`if(last_was_control)`
300			`begin`
301			`if(!(data[8]^control[1]^control[0]) != data[9])`
302			`begin`
303			`rx_error <= 1'b1;`
304			`end`
305			`end`
306			`else if(last_was_timec)`
307			`begin`
308			`if(!(data[8]^timecode[0]^timecode[1]^timecode[2]^timecode[3]^timecode[4]^timecode[5]^timecode[6]^timecode[7]) != data[9])`
309			`begin`
310			`rx_error <= 1'b1;`
311			`end`
312			`end`
313			`else if(last_was_data)`
314			`begin`
315			`if(!(data[8]^data[0]^data_l_r[1]^data_l_r[2]^data_l_r[3]^data_l_r[4]^data_l_r[5]^data_l_r[6]^data_l_r[7]) != data[9])`
316			`begin`
317			`rx_error <= 1'b1;`
318			`end`
319			`end`
320			`end`
321	23	redbear	`end`
322	26	redbear
323			`end`
324
325			`always@(posedge negedge_clk or negedge rx_resetn)`
326			`begin`
327			`if(!rx_resetn)`
328			`begin`
329			`rx_got_null <= 1'b0;`
330			`rx_got_nchar <= 1'b0;`
331			`rx_got_time_code <= 1'b0;`
332			`rx_got_fct <= 1'b0;`
333	23	redbear	`end`
334	26	redbear	`else`
335	23	redbear	`begin`
336	26	redbear	`if(control_l_r[2:0] != 3'd7 && control[2:0] == 3'd4 && last_is_control)`
337	23	redbear	`begin`
338	26	redbear	`rx_got_fct <= 1'b1;`
339			`rx_got_null <= 1'b0;`
340			`rx_got_nchar <= 1'b0;`
341			`rx_got_time_code <= 1'b0;`
342	23	redbear	`end`
343	26	redbear	`else if(control[2:0] != 3'd7 && last_is_data)`
344	23	redbear	`begin`
345	26	redbear	`rx_got_nchar <= 1'b1;`
346			`rx_got_null <= 1'b0;`
347			`rx_got_time_code <= 1'b0;`
348			`rx_got_fct <= 1'b0;`
349	23	redbear	`end`
350	26	redbear	`else if(control[2:0] == 3'd7 && last_is_data)`
351	23	redbear	`begin`
352	26	redbear	`rx_got_time_code <= 1'b1;`
353			`rx_got_null <= 1'b0;`
354			`rx_got_nchar <= 1'b0;`
355			`rx_got_fct <= 1'b0;`
356	23	redbear	`end`
357	26	redbear	`else if(control_l_r[2:0] == 3'd7 && control[2:0] == 3'd4 && last_is_control)`
358			`begin`
359			`rx_got_null <= 1'b1;`
360			`rx_got_nchar <= 1'b0;`
361			`rx_got_time_code <= 1'b0;`
362			`rx_got_fct <= 1'b0;`
363			`end`
364			`else`
365			`begin`
366			`rx_got_null <= rx_got_null;`
367			`rx_got_nchar <= rx_got_nchar;`
368			`rx_got_time_code <= rx_got_time_code;`
369			`rx_got_fct <= rx_got_fct;`
370			`end`
371	23	redbear	`end`
372			`end`
373
374	26	redbear
375			`always@(posedge negedge_clk or negedge rx_resetn)`
376	23	redbear	`begin`
377	26	redbear	`if(!rx_resetn)`
378			`begin`
379			`rx_buffer_write <= 1'b0;`
380			`rx_data_take_0 <= 1'b0;`
381			`end`
382			`else`
383			`begin`
384			`rx_data_take_0 <= rx_data_take;`
385			`rx_buffer_write <= rx_data_take_0;`
386			`end`
387			`end`
388	23	redbear
389	26	redbear	`always@(posedge ready_control or negedge rx_resetn )`
390			`begin`
391	23	redbear	`if(!rx_resetn)`
392			`begin`
393	26	redbear	`control_r <= 4'd0;`
394			`end`
395			`else`
396			`begin`
397			`if(counter_neg == 5'd2)`
398			`control_r <= {bit_c_3,bit_c_2,bit_c_1,bit_c_0};`
399			`else if(counter_neg == 5'd1 && control == 4'd7)`
400			`control_r <= {bit_c_ex,bit_c_2,bit_c_3,bit_c_0};`
401			`else`
402			`control_r <= control_r;`
403			`end`
404			`end`
405
406			`always@(posedge ready_data or negedge rx_resetn )`
407			`begin`
408			`if(!rx_resetn)`
409			`begin`
410			`dta_timec <= 10'd0;`
411			`end`
412			`else`
413			`begin`
414			`if(counter_neg == 5'd5)`
415			`dta_timec <= {bit_d_9,bit_d_8,bit_d_0,bit_d_1,bit_d_2,bit_d_3,bit_d_4,bit_d_5,bit_d_6,bit_d_7};`
416			`else`
417			`dta_timec <= dta_timec;`
418			`end`
419			`end`
420
421			`always@(posedge posedge_clk or negedge rx_resetn )`
422			`begin`
423
424			`if(!rx_resetn)`
425			`begin`
426	23	redbear	`control <= 4'd0;`
427			`control_l_r <= 4'd0;`
428
429			`data <= 10'd0;`
430			`data_l_r <= 10'd0;`
431			`//rx_data_flag <= 9'd0;`
432			`//rx_buffer_write <= 1'b0;`
433			`//rx_data_take <= 1'b0;`
434
435			`timecode <= 10'd0;`
436			`// rx_time_out <= 8'd0;`
437			`// rx_tick_out <= 1'b0;`
438
439			`last_is_control <=1'b0;`
440			`last_is_data <=1'b0;`
441			`last_is_timec <=1'b0;`
442
443			`last_was_control <=1'b0;`
444			`last_was_data <=1'b0;`
445			`last_was_timec <=1'b0;`
446	26	redbear
447			`info <= 14'd0;`
448			`//rx_error <= 1'b0;`
449			`//rx_got_null <= 1'b0;`
450			`//rx_got_nchar <= 1'b0;`
451			`//rx_got_time_code <= 1'b0;`
452			`//rx_got_fct <= 1'b0;`
453
454			`//meta_hold_setup <= 1'b0;`
455			`//meta_hold_setup_n <= 1'b0;`
456			`//meta_hold_setup_n_n<= 1'b0;`
457	23	redbear
458			`end`
459			`else`
460			`begin`
461
462	26	redbear	`//meta_hold_setup_n_n <= meta_hold_setup;`
463			`//meta_hold_setup_n <= meta_hold_setup_n_n;`
464	23	redbear
465	26	redbear	`if(ready_control)`
466	23	redbear	`begin`
467	26	redbear	`control <= control_r;`
468			`control_l_r <= control;`
469	23	redbear
470	26	redbear	`last_is_control <= 1'b1;`
471			`last_is_data <= 1'b0;`
472			`last_is_timec <= 1'b0;`
473			`last_was_control <= last_is_control;`
474			`last_was_data <= last_is_data ;`
475			`last_was_timec <= last_is_timec;`
476
477			`info <= {control_l_r,control,rx_error,rx_got_bit,rx_got_null,rx_got_nchar,rx_got_time_code,rx_got_fct};`
478
479			`end`
480			`else if(ready_data)`
481			`begin`
482			`if(control[2:0] != 3'd7)`
483			`begin`
484			`data <= dta_timec;`
485			`last_is_control <=1'b0;`
486			`last_is_data <=1'b1;`
487			`last_is_timec <=1'b0;`
488			`last_was_control <= last_is_control;`
489			`last_was_data <= last_is_data ;`
490			`last_was_timec <= last_is_timec;`
491			`end`
492			`else if(control[2:0] == 3'd7)`
493			`begin`
494			`timecode <= dta_timec;`
495			`last_is_control <= 1'b0;`
496			`last_is_data <= 1'b0;`
497			`last_is_timec <= 1'b1;`
498			`last_was_control <= last_is_control;`
499			`last_was_data <= last_is_data ;`
500			`last_was_timec <= last_is_timec;`

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[/] [spacewiresystemc/] [trunk/] [rtl/] [DEBUG_VERILOG/] [detector_tokens.v] - Blame information for rev 37