uzix/TSConf_MiST
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Reduce system clock. Use separate clock for scandoubler.

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sorgelig
2018-08-24 03:32:37 +08:00
parent c9c9f4265a
commit fd4fad5c04
4 changed files with 41 additions and 32 deletions
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10
TSConf.sv
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@ -150,12 +150,14 @@ assign CMOSCfg[27:25]= status[27:25] + 1'd1;
//////////////////// CLOCKS ///////////////////
wire clk_sys;
wire clk_vid;
pll pll
(
.refclk(CLK_50M),
.outclk_0(clk_sys),
.outclk_1(SDRAM_CLK)
.outclk_1(SDRAM_CLK),
.outclk_2(clk_vid)
);
reg ce_28m;
@ -163,6 +165,7 @@ always @(negedge clk_sys) begin
reg [1:0] div;
div <= div + 1'd1;
if(div == 2) div <= 0;
ce_28m <= !div;
end
@ -339,19 +342,20 @@ assign AUDIO_S = 1;
assign AUDIO_MIX = status[4:3];
reg ce_pix;
always @(posedge clk_sys) begin
always @(posedge clk_vid) begin
reg old_ce;
old_ce <= ce_vid;
ce_pix <= ~old_ce & ce_vid;
end
assign CLK_VIDEO = clk_sys;
assign CLK_VIDEO = clk_vid;
wire [1:0] scale = status[2:1];
video_mixer video_mixer
(
.*,
.clk_sys(clk_vid),
.ce_pix_out(CE_PIXEL),
.scanlines({scale == 3, scale == 2}),