-
Notifications
You must be signed in to change notification settings - Fork 0
/
periphModule.v
285 lines (231 loc) · 7.07 KB
/
periphModule.v
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
module periphModule(
input clk_sdram,
input clk_lcd,
input clk_cam,
input reset_n,
//lcd
output [7:0] R,
output [7:0] G,
output [7:0] B,
output HSYNC,
output VSYNC,
output LCD_CLK,
output DE,
//camera
output camera_ref_clk,
input camera_vsync,
input camera_hsync,
input camera_pclk,
input [7:0] camera_data,
//sdram
output wire [25:0] sdram_mm_slave_address, // sdram_mm_slave.address
output reg [1:0] sdram_mm_slave_byteenable_n = 0, // .byteenable_n
output reg sdram_mm_slave_chipselect = 1, // .chipselect
output wire [15:0] sdram_mm_slave_writedata, // .writedata
output wire sdram_mm_slave_read_n, // .read_n
output wire sdram_mm_slave_write_n, // .write_n
input wire [15:0] sdram_mm_slave_readdata, // .readdata
input wire sdram_mm_slave_readdatavalid, // .readdatavalid
input wire sdram_mm_slave_waitrequest // .waitrequest
);
wire [15:0] lcd_readdata ;
wire lcd_read;
wire lcd_clock;
wire write_fifo;
wire [15:0] m2f_data;
wire [8:0] lcd_fifo_wrusedw;
fifo_lcd fifo_lcd_inst (
.aclr ( ~reset_n ),
.data ( m2f_data ),
.rdclk ( clk_lcd ),
.rdreq ( lcd_read ),
.wrclk ( clk_sdram ),
.wrreq ( write_fifo ),
.q ( lcd_readdata ),
.wrusedw ( lcd_fifo_wrusedw )
);
big_lcd lcd0
(
.clk(clk_lcd),
.reset(reset_n),
.lcd_readdata(lcd_readdata),
.lcd_read(lcd_read),
.R(R),
.G(G),
.B(B),
.HSYNC(HSYNC),
.VSYNC(VSYNC),
.LCD_CLK(LCD_CLK)
);
wire [15:0] cam2fifo_data;
wire cam2fifo_wrreq;
wire cam2fifo_wrclk;
wire [8:0] cam2fifo_rdusedw;
reg sdram_mm_slave_write_n_reg;
cameraReader camera
(
.clk(clk_cam),
.reset_n(reset_n),
.refclk(camera_ref_clk),
.pclk(camera_pclk),
.data(camera_data),
.vsync(camera_vsync),
.hsync(camera_hsync),
.data_out(cam2fifo_data),
.wrreq(cam2fifo_wrreq),
.wrclk(cam2fifo_wrclk)
);
reg [2:0] cam_vsync_cdc;
always@(posedge clk_sdram)
cam_vsync_cdc <= {cam_vsync_cdc[1:0], camera_vsync};
reg [2:0] fifo_states = 0;
cam_fifo cam_fifo_inst (
.data ( cam2fifo_data ),
.wrclk ( cam2fifo_wrclk ),
.wrreq ( cam2fifo_wrreq ),
.q ( sdram_mm_slave_writedata ),
.rdclk ( clk_sdram ),
.rdreq ( (sdram_mm_slave_waitrequest == 0) & (fifo_states == 1) ? 1 : 0 ),
.rdusedw ( cam2fifo_rdusedw )
);
always@(posedge clk_sdram)
sdram_mm_slave_write_n_reg <= (sdram_mm_slave_waitrequest == 0) && (fifo_states == 1) ? 0 : 1;
reg [15:0] lcd_pixel_counter = 0;
reg [24:0] camera_addr_pointer = 0;
reg [24:0] lcd_addr_pointer = 0;
reg [15:0] pixel_color;
assign sdram_mm_slave_address = fifo_states == 0 ? lcd_addr_pointer : camera_addr_pointer;
assign m2f_data = sdram_mm_slave_readdata;
assign write_fifo = sdram_mm_slave_readdatavalid & (fifo_states == 0);
assign sdram_mm_slave_read_n = fifo_states == 0 ? 0 : 1;
assign sdram_mm_slave_write_n = (sdram_mm_slave_waitrequest == 0) && (fifo_states == 1) ? 0 : 1;
//assign sdram_mm_slave_writedata = pixel_color;
always@(posedge clk_sdram)
begin
if(reset_n == 0)
begin
fifo_states <= 0;
camera_addr_pointer <= 0;
lcd_addr_pointer <= 0;
end
else
begin
case (fifo_states)
0: //fill lcd fifo
begin
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
///////////////////////////////////////////
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
////////////////////
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw <= 2)
fifo_states <= 2;
if(sdram_mm_slave_readdatavalid == 1)
if(lcd_addr_pointer == 640*480 - 1)
begin
lcd_addr_pointer <= 0;
end
else
lcd_addr_pointer <= lcd_addr_pointer + 1;
end
1: //write from camera fifo
begin
if(sdram_mm_slave_waitrequest == 0)
if(camera_addr_pointer == 640*480 - 1)
begin
camera_addr_pointer <= 0;
end
else
begin
camera_addr_pointer <= camera_addr_pointer + 1;
end
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
///////////////////////////////////////////
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
////////////////////
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw <= 2)
fifo_states <= 2;
end
2:
begin
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw >= 500)
fifo_states <= 1;
///////////////////////////////////////////
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw <= 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw <= 2)
fifo_states <= 0;
else
if(lcd_fifo_wrusedw < 500 && lcd_fifo_wrusedw > 2 && cam2fifo_rdusedw > 2 && cam2fifo_rdusedw < 500)
fifo_states <= 0;
////////////////////
else
if(lcd_fifo_wrusedw >= 500 && cam2fifo_rdusedw <= 2)
fifo_states <= 2;
end
default:
begin
end
endcase
if(cam_vsync_cdc == 3'b111)
if(cam2fifo_rdusedw == 0)
camera_addr_pointer <= 0;
else
camera_addr_pointer <= 640*480 - cam2fifo_rdusedw - 1;
end
end
endmodule