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Tweaks for direct video.

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This commit is contained in:
sorgelig 2019-09-28 01:34:31 +08:00
parent 1d4a67559e
commit 4f0e9230b9
1 changed files with 6 additions and 3 deletions
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9
video.v
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@ -23,7 +23,7 @@ localparam kVisibleWidth = 128,
kVisibleHeightEnd = 362,
kTotalHeight = 370,
kHsyncStart = 135,
kHsyncEnd = 151,
kHsyncEnd = 152,
kVsyncStart = 365,
kVsyncEnd = 369,
kPixelLatency = 1; // number of clk8 cycles from xpos==0 to when pixel data actually exits the video shift register
@ -73,8 +73,11 @@ always @(posedge clk) begin
xpos <= xpos + 1'b1;
end
hsync <= (xpos >= kHsyncStart+kPixelLatency && xpos <= kHsyncEnd+kPixelLatency);
vsync <= (ypos >= kVsyncStart && ypos <= kVsyncEnd);
if(xpos == kHsyncStart+kPixelLatency) begin
hsync <= 1;
vsync <= (ypos >= kVsyncStart && ypos <= kVsyncEnd);
end
if(xpos == kHsyncEnd+kPixelLatency) hsync <= 0;
end
end