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- module hvsync_generator(clk, vga_h_sync, vga_v_sync, inDisplayArea, CounterX, CounterY);
- input clk;
- output vga_h_sync, vga_v_sync;
- output inDisplayArea;
- output [9:0] CounterX;
- output [8:0] CounterY;
- //////////////////////////////////////////////////
- reg [9:0] CounterX;
- reg [8:0] CounterY;
- wire CounterXmaxed = (CounterX==10'h2FF);
- always @(posedge clk)
- if(CounterXmaxed)
- CounterX <= 0;
- else
- CounterX <= CounterX + 1;
- always @(posedge clk)
- if(CounterXmaxed) CounterY <= CounterY + 1;
- reg vga_HS, vga_VS;
- always @(posedge clk)
- begin
- vga_HS <= (CounterX[9:4]==6'h2D); // change this value to move the display horizontally
- vga_VS <= (CounterY==500); // change this value to move the display vertically
- end
- reg inDisplayArea;
- always @(posedge clk)
- if(inDisplayArea==0)
- inDisplayArea <= (CounterXmaxed) && (CounterY<480);
- else
- inDisplayArea <= !(CounterX==639);
- assign vga_h_sync = ~vga_HS;
- assign vga_v_sync = ~vga_VS;
- endmodule
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