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Initial latency tester implementation

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marqs committed 2017-10-22 22:45:29 +03:00
1 parent a8d1fad24a
commit 1bf279b2a7
15 files changed
+2230 -1196
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rtl/videogen.v
+32 -6
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@@ -17,9 +17,18 @@
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
`define LT_POS_NONE 2'b00
`define LT_POS_TOPLEFT 2'b01
`define LT_POS_CENTER 2'b10
`define LT_POS_BOTTOMRIGHT 2'b11
`define LT_WIDTH 100
`define LT_HEIGHT 100
module videogen (
input clk27,
input reset_n,
input lt_active,
input [1:0] lt_mode,
output [7:0] R_out,
output [7:0] G_out,
output [7:0] B_out,
@@ -114,12 +123,29 @@ begin
V_gen <= 8'h00;
ENABLE_out <= 1'b0;
end else begin
if ((h_cnt < X_START+H_OVERSCAN) || (h_cnt >= X_START+H_OVERSCAN+H_AREA) || (v_cnt < Y_START+V_OVERSCAN) || (v_cnt >= Y_START+V_OVERSCAN+V_AREA))
V_gen <= (h_cnt[0] ^ v_cnt[0]) ? 8'hff : 8'h00;
else if ((h_cnt < X_START+H_OVERSCAN+H_BORDER) || (h_cnt >= X_START+H_OVERSCAN+H_AREA-H_BORDER) || (v_cnt < Y_START+V_OVERSCAN+V_BORDER) || (v_cnt >= Y_START+V_OVERSCAN+V_AREA-V_BORDER))
V_gen <= 8'h50;
else
V_gen <= (h_cnt - (X_START+H_OVERSCAN+H_BORDER)) >> 1;
if (lt_active) begin
case (lt_mode)
default: begin
V_gen <= 8'h00;
end
`LT_POS_TOPLEFT: begin
V_gen <= ((h_cnt < (X_START+`LT_WIDTH)) && (v_cnt < (Y_START+`LT_HEIGHT))) ? 8'hff : 8'h00;
end
`LT_POS_CENTER: begin
V_gen <= ((h_cnt >= (X_START+(H_ACTIVE/2)-(`LT_WIDTH/2))) && (h_cnt < (X_START+(H_ACTIVE/2)+(`LT_WIDTH/2))) && (v_cnt >= (Y_START+(V_ACTIVE/2)-(`LT_HEIGHT/2))) && (v_cnt < (Y_START+(V_ACTIVE/2)+(`LT_HEIGHT/2)))) ? 8'hff : 8'h00;
end
`LT_POS_BOTTOMRIGHT: begin
V_gen <= ((h_cnt >= (X_START+H_ACTIVE-`LT_WIDTH)) && (v_cnt >= (Y_START+V_ACTIVE-`LT_HEIGHT))) ? 8'hff : 8'h00;
end
endcase
end else begin
if ((h_cnt < X_START+H_OVERSCAN) || (h_cnt >= X_START+H_OVERSCAN+H_AREA) || (v_cnt < Y_START+V_OVERSCAN) || (v_cnt >= Y_START+V_OVERSCAN+V_AREA))
V_gen <= (h_cnt[0] ^ v_cnt[0]) ? 8'hff : 8'h00;
else if ((h_cnt < X_START+H_OVERSCAN+H_BORDER) || (h_cnt >= X_START+H_OVERSCAN+H_AREA-H_BORDER) || (v_cnt < Y_START+V_OVERSCAN+V_BORDER) || (v_cnt >= Y_START+V_OVERSCAN+V_AREA-V_BORDER))
V_gen <= 8'h50;
else
V_gen <= (h_cnt - (X_START+H_OVERSCAN+H_BORDER)) >> 1;
end
ENABLE_out <= (h_cnt >= X_START && h_cnt < X_START + H_ACTIVE && v_cnt >= Y_START && v_cnt < Y_START + V_ACTIVE);
end