source: sandbox/MultiChannelUSB/deconv.v@ 168

Last change on this file since 168 was 144, checked in by demin, 14 years ago

remove size parameter and all dependent loops
File size: 9.3 KB
RevLine 
[113]1module deconv
2 #(
[123]3 parameter shift = 24, // right shift of the result
4 parameter width = 27, // bit width of the input data
[129]5 parameter widthr = 12 // bit width of the output data
[113]6 )
7 (
8 input wire clock, frame, reset,
[144]9 input wire [4*6-1:0] del_data,
10 input wire [4*6-1:0] amp_data,
11 input wire [4*16-1:0] tau_data,
12 input wire [4*width-1:0] inp_data,
13 output wire [4*widthr-1:0] out_data
[113]14 );
15
[114]16 localparam width1 = width + 1;
17 localparam width2 = width + 6 + 1;
[123]18 localparam width3 = width + 16 + 3;
[113]19
[144]20 reg int_wren_reg, int_wren_next;
21 reg int_flag_reg, int_flag_next;
22 reg [1:0] int_chan_reg, int_chan_next;
23 reg [2:0] int_case_reg, int_case_next;
24 reg [7:0] int_addr_reg, int_addr_next;
[113]25
[144]26 reg [5:0] del_addr_reg, del_addr_next;
27 wire [5:0] del_addr_wire;
28 wire [7:0] int_addr_wire;
[113]29
[144]30 reg [widthr-1:0] out_data_reg [4:0], out_data_next [4:0];
31 wire [widthr-1:0] out_data_wire;
[113]32
[144]33 wire [width3-1:0] add_data_wire;
[120]34
[144]35 wire [width3-1:0] mul_data_wire [1:0];
[113]36
[144]37 reg [width2-1:0] acc_data_reg [4:0], acc_data_next [4:0];
38 wire [width2-1:0] acc_data_wire;
[113]39
[144]40 wire [width1-1:0] sub_data_wire;
[114]41
[144]42 reg [width-1:0] inp_data_reg [3:0], inp_data_next [3:0];
43 wire [width-1:0] inp_data_wire [4:0];
[114]44
[144]45 reg [5:0] amp_data_reg, amp_data_next;
46 wire [5:0] amp_data_wire [3:0];
[114]47
[144]48 reg [15:0] tau_data_reg, tau_data_next;
49 wire [15:0] tau_data_wire [3:0];
[114]50
[113]51 integer i;
52 genvar j;
53
54 generate
[144]55 for (j = 0; j < 4; j = j + 1)
56 begin : INT_DATA
57 assign inp_data_wire[j] = inp_data[j*width+width-1:j*width];
58 assign amp_data_wire[j] = amp_data[j*6+6-1:j*6];
59 assign tau_data_wire[j] = tau_data[j*16+16-1:j*16];
60 end
61 endgenerate
62
63 lpm_mux #(
64 .lpm_size(4),
65 .lpm_type("LPM_MUX"),
66 .lpm_width(8),
67 .lpm_widths(2)) mux_unit_1 (
68 .sel(int_chan_next),
69 .data({
70 2'd3, del_data[3*6+6-1:3*6],
71 2'd2, del_data[2*6+6-1:2*6],
72 2'd1, del_data[1*6+6-1:1*6],
73 2'd0, del_data[0*6+6-1:0*6]}),
74 .result(int_addr_wire));
[114]75
[144]76 assign del_addr_wire = del_addr_reg - int_addr_wire[5:0];
[113]77
[144]78 assign sub_data_wire =
79 {{(width1-width){1'b0}}, inp_data_reg[0]}
80 - {{(width1-width){1'b0}}, inp_data_wire[4]};
[113]81
[144]82 assign acc_data_wire =
83 {{(width2-width1+1){sub_data_wire[width1-1]}}, sub_data_wire[width1-2:0]}
84 + acc_data_reg[0];
85
86 lpm_mult #(
87 .lpm_hint("MAXIMIZE_SPEED=9"),
88 .lpm_representation("SIGNED"),
89 .lpm_type("LPM_MULT"),
90 .lpm_pipeline(3),
91 .lpm_widtha(width1),
92 .lpm_widthb(17),
93 .lpm_widthp(width3)) mult_unit_1 (
94 .clock(clock),
95 .clken(int_wren_reg),
96 .dataa(sub_data_wire),
97 .datab({1'b0, tau_data_reg}),
98 .result(mul_data_wire[0]));
[113]99
[144]100 lpm_mult #(
101 .lpm_hint("MAXIMIZE_SPEED=9"),
102 .lpm_representation("UNSIGNED"),
103 .lpm_type("LPM_MULT"),
104 .lpm_pipeline(3),
105 .lpm_widtha(width2),
106 .lpm_widthb(6),
107 .lpm_widthp(width3)) mult_unit_2 (
108 .clock(clock),
109 .clken(int_wren_reg),
110 .dataa(acc_data_reg[0]),
111 .datab(amp_data_reg),
112 .result(mul_data_wire[1]));
[113]113
[144]114 assign add_data_wire =
115 mul_data_wire[0]
116 + mul_data_wire[1];
[113]117
[144]118 assign out_data_wire =
119 add_data_wire[shift+widthr-1:shift]
120 + {{(widthr-1){add_data_wire[width3-1]}}, add_data_wire[shift-1]};
[113]121
122 altsyncram #(
123 .address_aclr_b("NONE"),
124 .address_reg_b("CLOCK0"),
125 .clock_enable_input_a("BYPASS"),
126 .clock_enable_input_b("BYPASS"),
127 .clock_enable_output_b("BYPASS"),
128 .intended_device_family("Cyclone III"),
129 .lpm_type("altsyncram"),
130 .numwords_a(256),
131 .numwords_b(256),
132 .operation_mode("DUAL_PORT"),
133 .outdata_aclr_b("NONE"),
134 .outdata_reg_b("CLOCK0"),
135 .power_up_uninitialized("FALSE"),
136 .read_during_write_mode_mixed_ports("DONT_CARE"),
137 .widthad_a(8),
138 .widthad_b(8),
[144]139 .width_a(width),
140 .width_b(width),
[113]141 .width_byteena_a(1)) ram_unit_1 (
142 .wren_a(int_wren_reg),
143 .clock0(clock),
144 .address_a(int_addr_reg),
145 .address_b({int_addr_wire[7:6], del_addr_wire}),
[114]146 .data_a(inp_data_reg[0]),
[130]147 .q_b(inp_data_wire[4]),
[113]148 .aclr0(1'b0),
149 .aclr1(1'b0),
150 .addressstall_a(1'b0),
151 .addressstall_b(1'b0),
152 .byteena_a(1'b1),
153 .byteena_b(1'b1),
154 .clock1(1'b1),
155 .clocken0(1'b1),
156 .clocken1(1'b1),
157 .clocken2(1'b1),
158 .clocken3(1'b1),
[144]159 .data_b({(width){1'b1}}),
[113]160 .eccstatus(),
161 .q_a(),
162 .rden_a(1'b1),
163 .rden_b(1'b1),
164 .wren_b(1'b0));
165
166 always @(posedge clock)
167 begin
168 if (reset)
169 begin
170 int_wren_reg <= 1'b1;
[130]171 int_flag_reg <= 1'b0;
[113]172 int_chan_reg <= 2'd0;
173 int_case_reg <= 3'd0;
[114]174 del_addr_reg <= 6'd0;
[113]175 int_addr_reg <= 8'd0;
[129]176 amp_data_reg <= 6'd0;
[114]177 tau_data_reg <= 16'd0;
[130]178 for(i = 0; i <= 3; i = i + 1)
[113]179 begin
[144]180 inp_data_reg[i] <= {(width){1'b0}};
[113]181 end
[130]182 for(i = 0; i <= 4; i = i + 1)
[113]183 begin
[144]184 acc_data_reg[i] <= {(width2){1'b0}};
185 out_data_reg[i] <= {(widthr){1'b0}};
[113]186 end
187 end
188 else
189 begin
190 int_wren_reg <= int_wren_next;
[130]191 int_flag_reg <= int_flag_next;
[113]192 int_chan_reg <= int_chan_next;
193 int_case_reg <= int_case_next;
[114]194 del_addr_reg <= del_addr_next;
[113]195 int_addr_reg <= int_addr_next;
[114]196 amp_data_reg <= amp_data_next;
197 tau_data_reg <= tau_data_next;
[130]198 for(i = 0; i <= 3; i = i + 1)
[113]199 begin
[114]200 inp_data_reg[i] <= inp_data_next[i];
201 end
[130]202 for(i = 0; i <= 4; i = i + 1)
[114]203 begin
[113]204 acc_data_reg[i] <= acc_data_next[i];
[130]205 out_data_reg[i] <= out_data_next[i];
[114]206 end
[113]207 end
208 end
209
210 always @*
211 begin
212 int_wren_next = int_wren_reg;
[130]213 int_flag_next = int_flag_reg;
[113]214 int_chan_next = int_chan_reg;
215 int_case_next = int_case_reg;
[114]216 del_addr_next = del_addr_reg;
[113]217 int_addr_next = int_addr_reg;
[114]218 amp_data_next = amp_data_reg;
219 tau_data_next = tau_data_reg;
[130]220 for(i = 0; i <= 3; i = i + 1)
[113]221 begin
[114]222 inp_data_next[i] = inp_data_reg[i];
223 end
[130]224 for(i = 0; i <= 4; i = i + 1)
[114]225 begin
[113]226 acc_data_next[i] = acc_data_reg[i];
[130]227 out_data_next[i] = out_data_reg[i];
[114]228 end
[113]229
230 case (int_case_reg)
231 0:
232 begin
233 // write zeros
234 int_wren_next = 1'b1;
[114]235 del_addr_next = 6'd0;
[113]236 int_addr_next = 8'd0;
[129]237 amp_data_next = 6'd0;
[114]238 tau_data_next = 16'd0;
[130]239 for(i = 0; i <= 3; i = i + 1)
[113]240 begin
[144]241 inp_data_next[i] = {(width){1'b0}};
[114]242 end
[130]243 for(i = 0; i <= 4; i = i + 1)
[113]244 begin
[144]245 acc_data_next[i] = {(width2){1'b0}};
246 out_data_next[i] = {(widthr){1'b0}};
[114]247 end
248
[113]249 int_case_next = 3'd1;
250 end
251 1:
252 begin
253 // write zeros
254 int_addr_next = int_addr_reg + 8'd1;
255 if (&int_addr_reg)
256 begin
257 int_wren_next = 1'b0;
[130]258 int_flag_next = 1'b0;
[113]259 int_chan_next = 2'd0;
260 int_case_next = 3'd2;
261 end
262 end
263 2: // frame
264 begin
[130]265 int_flag_next = 1'b0;
266 int_wren_next = frame;
[113]267 if (frame)
268 begin
269 int_addr_next[7:6] = 2'd0;
270
271 // set read addr for 2nd pipeline
272 int_chan_next = 2'd1;
273
[130]274 // register input data for 2nd, 3rd and 4th sums
[114]275 inp_data_next[1] = inp_data_wire[1];
276 inp_data_next[2] = inp_data_wire[2];
[130]277 inp_data_next[3] = inp_data_wire[3];
[113]278
279 // prepare registers for 1st sum
[114]280 inp_data_next[0] = inp_data_wire[0];
281 acc_data_next[0] = acc_data_reg[1];
282
283 tau_data_next = tau_data_wire[0];
284 amp_data_next = amp_data_wire[0];
285
[113]286 int_case_next = 3'd3;
287 end
[130]288 if (int_flag_reg) // register 4th sum
289 begin
290 int_addr_next[5:0] = del_addr_reg;
[134]291 // register 4th sum and 1st product
[130]292 acc_data_next[4] = acc_data_wire;
[133]293 out_data_next[0] = out_data_wire;
[130]294 end
[113]295 end
296 3: // 1st sum
297 begin
298 int_addr_next[7:6] = 2'd1;
299
300 // set read addr for 3rd pipeline
301 int_chan_next = 2'd2;
302
303 // prepare registers for 2nd sum
[114]304 inp_data_next[0] = inp_data_reg[1];
305 acc_data_next[0] = acc_data_reg[2];
306
307 tau_data_next = tau_data_wire[1];
308 amp_data_next = amp_data_wire[1];
309
[134]310 // register 1st sum and 2nd product
[114]311 acc_data_next[1] = acc_data_wire;
[133]312 out_data_next[1] = out_data_wire;
[113]313
314 int_case_next = 3'd4;
315 end
316 4: // 2nd sum
317 begin
318 int_addr_next[7:6] = 2'd2;
319
[130]320 // set read addr for 4th pipeline
321 int_chan_next = 2'd3;
322
[113]323 // prepare registers for 3rd sum
[114]324 inp_data_next[0] = inp_data_reg[2];
325 acc_data_next[0] = acc_data_reg[3];
326
327 tau_data_next = tau_data_wire[2];
328 amp_data_next = amp_data_wire[2];
[113]329
[134]330 // register 2nd sum and 3rd product
[114]331 acc_data_next[2] = acc_data_wire;
[133]332 out_data_next[2] = out_data_wire;
[113]333
[114]334 del_addr_next = del_addr_reg + 6'd1;
335
[113]336 int_case_next = 3'd5;
337 end
338 5: // 3rd sum
339 begin
[130]340 int_flag_next = 1'b1;
[113]341
[130]342 int_addr_next[7:6] = 2'd3;
343
[113]344 // set read addr for 1st pipeline
345 int_chan_next = 2'd0;
346
[130]347 // prepare registers for 4th sum
348 inp_data_next[0] = inp_data_reg[3];
349 acc_data_next[0] = acc_data_reg[4];
350
351 tau_data_next = tau_data_wire[3];
352 amp_data_next = amp_data_wire[3];
353
[134]354 // register 3rd sum and 4th product
[114]355 acc_data_next[3] = acc_data_wire;
[133]356 out_data_next[3] = out_data_wire;
[113]357
[130]358 // register 4th output
[134]359 out_data_next[4] = out_data_reg[0];
[113]360
361 int_case_next = 3'd2;
362 end
363 default:
364 begin
365 int_case_next = 3'd0;
366 end
367 endcase
368 end
369
[134]370 assign out_data = {out_data_reg[3], out_data_reg[2], out_data_reg[1], out_data_reg[4]};
[113]371
372endmodule
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