1 module lcd_dvp_drive 2 #( 3 parameter VBP= 2, //OK 4 parameter VFP= 36, //OK 5 parameter VSW= 6 , //OK 6 parameter VDP= 480 ,//524 7 8 parameter HBP= 8, //ok 9 parameter HFP= 96, //ok 10 parameter HSW= 16 , //ok 11 parameter HDP=720 //840 12 13 ) 14 ( 15 clk_i , //时钟输入 840*524*2*60=52.819MHZ//实测53.82MHZ 16 17 rst_i , //复位输入 18 display_on , //显示开关输入 19 data_rgb_i , //16位红色数据输入 20 data_rdy_o , //数据输入请求信号输出 21 22 hsync_o , //行同步信号输出 23 vsync_o , //场同步信号输出 24 lcd_de , //LCD输出有效标志 25 26 pclk_o , //数据时钟输出 27 Serial_data8_o , //8位数据输出 28 xpos_o , //当前行计数输出 29 ypos_o , //当前列计数输出 30 lcd_bl , //背光开关控制 1亮背光 0灭背光 31 out_vsync //帧复位，高有效 32 ); 33 34 localparam [16:0] H_TOTAL= (HBP+HFP+HSW+HDP);//每个像素发送两次8位数据 35 localparam [16:0] V_TOTAL= (VBP+VFP+VSW+VDP); 36 37 input wire [0:0] clk_i; 38 input wire [0:0] rst_i; 39 40 input wire [0:0] display_on; 41 input wire [15:0] data_rgb_i; 42 43 output wire [0:0] data_rdy_o; 44 45 output wire [0:0] hsync_o; 46 output wire [0:0] vsync_o; 47 48 output wire [0:0] pclk_o; 49 output wire [7:0] Serial_data8_o; 50 51 output wire [15:0] xpos_o; 52 output wire [15:0] ypos_o; 53 54 output wire lcd_bl; 55 output wire out_vsync; 56 output wire lcd_de; 57 58 reg [16:0] H_CNT_R; 59 reg [16:0] V_CNT_R; 60 61 reg hsync_r; 62 reg vsync_r; 63 reg enable_r; 64 reg lcd_bl_r; 65 reg [7:0] Serial_data8_r; 66 67 68 69 //行计数 70 reg h_cnt_flag; 71 always @(negedge clk_i or negedge rst_i ) 72 begin 73 if(rst_i==1'b0 || display_on==1'b0 ) 74 begin 75 H_CNT_R<=17'd0; 76 h_cnt_flag<=1'b0; 77 end 78 else if(H_CNT_R>=(H_TOTAL-1'D1)) 79 begin 80 H_CNT_R<=17'd0; 81 h_cnt_flag<=1'b0; 82 end 83 else if(h_cnt_flag==1'b1) 84 begin 85 H_CNT_R<=H_CNT_R+1'd1; 86 h_cnt_flag<=1'b0; 87 end 88 else 89 begin 90 h_cnt_flag<=1'b1; 91 H_CNT_R<=H_CNT_R; 92 end 93 end 94 95 //列计数 96 always @(negedge clk_i or negedge rst_i ) 97 begin 98 if(rst_i==1'b0 || display_on==1'b0 ) 99 V_CNT_R<=17'd0; 100 else if((V_CNT_R>=(V_TOTAL-1'D1)) && (H_CNT_R>=(H_TOTAL-1'D1))) 101 V_CNT_R<=17'D0; 102 else if(H_CNT_R>=(H_TOTAL-1'D1)) 103 V_CNT_R<=V_CNT_R+1'd1; 104 else 105 V_CNT_R<=V_CNT_R; 106 107 end 108 109 //输出VSYNC信号 110 always @(negedge clk_i or negedge rst_i ) 111 begin 112 if(rst_i==1'b0 ) 113 vsync_r<=1'b0; 114 else if((V_CNT_R>=(V_TOTAL-1'D1)) && (H_CNT_R>=(H_TOTAL-1'D1))) 115 vsync_r<=1'b0; 116 else if((V_CNT_R>=(VSW-1'd1))&&(H_CNT_R>=(H_TOTAL-1'D1))) 117 vsync_r<=1'b1; 118 else 119 vsync_r<=vsync_r; 120 121 end 122 123 124 //输出HSYNC信号 125 always @(negedge clk_i or negedge rst_i ) 126 begin 127 if(rst_i==1'b0 ) 128 hsync_r<=1'b0; 129 else if((H_CNT_R<HSW-1'd1) ||(H_CNT_R>=(H_TOTAL-1'd1))) 130 hsync_r<=1'b0; 131 else 132 hsync_r<=1'b1; 133 134 end 135 136 //输出ENABLE信号 137 always @(negedge clk_i or negedge rst_i ) 138 begin 139 if(rst_i==1'b0 ) 140 enable_r<=1'b0; 141 else if((H_CNT_R>(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-1'd1)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1))) 142 enable_r<=1'b1; 143 else 144 enable_r<=1'b0; 145 end 146 147 148 149 150 //向外发出数据输入请求 151 assign data_rdy_o=((H_CNT_R>(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-1'd1)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1)))? 1'b1:1'b0; 152 153 //输出当前行计数 154 //assign xpos_o = (data_rdy_o) ? (H_CNT_R-HSW-HBP):16'd0; 155 156 reg [15:0]xpos_r; 157 always @(negedge clk_i or negedge rst_i ) 158 begin 159 if(rst_i==1'b0 ) 160 xpos_r<=16'd0; 161 else if((H_CNT_R>(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-1'd1)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1))) 162 xpos_r<=(H_CNT_R+16'd2)-HSW-HBP; 163 else 164 xpos_r<=16'd0; 165 166 end 167 //输出当前列计数 168 //assign ypos_o = (data_rdy_o) ? (V_CNT_R-VSW-VBP):16'd0; 169 reg [15:0] ypos_r; 170 always @(negedge clk_i or negedge rst_i ) 171 begin 172 if(rst_i==1'b0 ) 173 ypos_r<=16'd0; 174 else if((H_CNT_R>=(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-2'd2)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1))) 175 ypos_r<=V_CNT_R-VSW-VBP; 176 else 177 ypos_r<=16'd0; 178 179 end 180 181 182 183 184 //输出显示数据 185 always @(negedge clk_i or negedge rst_i ) 186 begin 187 if(rst_i==1'b0 ) 188 begin 189 Serial_data8_r<=8'b0; 190 end 191 else if((H_CNT_R>(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-1'd1)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1)) && (h_cnt_flag==1'b0)) 192 begin 193 Serial_data8_r<=data_rgb_i[15:8]; 194 195 end 196 else if((H_CNT_R>(HSW+HBP-2'd2)) && (H_CNT_R<(HSW+HBP+HDP-1'd1)) && (V_CNT_R>(VSW+VBP-1'd1)) && (V_CNT_R<=(VSW+VBP+VDP-1'd1)) && (h_cnt_flag==1'b1)) 197 Serial_data8_r<=data_rgb_i[7:0]; 198 else 199 begin 200 Serial_data8_r<=Serial_data8_r; 201 end 202 203 end 204 205 always @(negedge clk_i or negedge rst_i ) 206 begin 207 if(rst_i==1'b0 || display_on==1'b0 ) 208 lcd_bl_r<=1'b0; 209 else if(ypos_o>2'd2) 210 begin 211 lcd_bl_r<=1'b1; 212 end 213 else 214 begin 215 lcd_bl_r<=lcd_bl_r; 216 end 217 end 218 219 //帧复位，高有效 220 assign out_vsync = ((H_CNT_R <= 100) && (V_CNT_R == 1)) ? 1'b1 : 1'b0; 221 222 assign hsync_o=(display_on==1'b1 )? hsync_r:1'bz ; 223 assign vsync_o=(display_on==1'b1 )? vsync_r:1'bz ; 224 assign lcd_de =(display_on==1'b1 )? enable_r:1'bz ; 225 assign lcd_bl =(display_on==1'b1 )? lcd_bl_r:1'bz ; 226 227 228 assign Serial_data8_o=(display_on==1'b1)? Serial_data8_r:8'bz ; 229 230 //输出PCLK信号 231 assign pclk_o=(display_on==1'b1 )? clk_i:16'bz ; 232 assign xpos_o=(display_on==1'b1 )? xpos_r:16'bz ; 233 assign ypos_o=(display_on==1'b1 )? ypos_r:16'bz ; 234 235 236 237 238 endmodule