구차니의 잡동사니 모음

• 3.1Compute (Nova)
• 3.2Networking (Neutron)
• 3.3Block storage (Cinder)
• 3.4Identity (Keystone)
• 3.5Image (Glance)
• 3.6Object storage (Swift)
• 3.7Dashboard (Horizon)
• 3.8Orchestration (Heat)
• 3.9Workflow (Mistral)
• 3.10Telemetry (Ceilometer)
• 3.11Database (Trove)
• 3.12Elastic map reduce (Sahara)
• 3.13Bare metal (Ironic)
• 3.14Messaging (Zaqar)
• 3.15Shared file system (Manila)
• 3.16DNS (Designate)
• 3.17Search (Searchlight)
• 3.18Key manager (Barbican)
• 3.19Container orchestration (Magnum)
• 3.20Root Cause Analysis (Vitrage)
• 3.21Rule-based alarm actions (Aodh)

module vga640x480(

input clk,

input rst,

output [7:0] LED,

output reg hsync,

output reg vsync,

output [3:0] r,

output [3:0] g,

output [3:0] b

);

reg clk25;

reg [9:0] horizontal_counter;

reg [9:0] vertical_counter;

reg [9:0] X;

reg [9:0] Y;

wire [7:0] red;

wire [7:0] green;

wire [7:0] blue;

initial

begin

horizontal_counter = 0;

vertical_counter = 0;

end

assign r[3:0] = ((horizontal_counter >= 144) 

&& (horizontal_counter < 784) 

&& (vertical_counter >=39)

&& (vertical_counter < 519)) ? red : 4'b000; 

assign g[3:0] = ((horizontal_counter >= 144) 

&& (horizontal_counter < 784) 

&& (vertical_counter >=39)

&& (vertical_counter < 519)) ? green : 4'b000; 

assign b[3:0] = ((horizontal_counter >= 144) 

&& (horizontal_counter < 784) 

&& (vertical_counter >=39)

&& (vertical_counter < 519)) ? blue : 4'b000; 

assign red =   ((horizontal_counter >= 144)&&(horizontal_counter < 344) ) ? 4'b1111 : 4'b0000;

assign green = ((horizontal_counter >= 344)&&(horizontal_counter < 544) ) ? 4'b1111 : 4'b0000;

assign blue =  ((horizontal_counter >= 544)&&(horizontal_counter < 784) ) ? 4'b1111 : 4'b0000;

always @(posedge clk)

begin

if (clk25 == 0)

begin

   clk25 <= 1;

end   

else

begin

clk25 <= 0;

   end

end

always @(posedge clk25)

begin

if ((horizontal_counter > 0) && (horizontal_counter < 97))// -- 96+1

begin

hsync <= 0;

end

else

begin

hsync <= 1;

end 

if ((vertical_counter > 0 ) && (vertical_counter < 3 )) //-- 2+1

begin

vsync <= 0;

end

else

begin

vsync <= 1;

end

horizontal_counter <= horizontal_counter+1;

if (horizontal_counter == 800) 

begin

vertical_counter <= vertical_counter+1;

horizontal_counter <= 0;

end

if (vertical_counter == 521)

begin

vertical_counter <= 0;

end

end

endmodule  

3.4.4 Measuring time

In wave viewer, select from top menus Add -> Cursor. Now you'll see 2 vertical lines (cursors). You can easily drag them and see the time interval between on the bottom. This is very handy when have to measure the execution time (or signal frequency). Just divide the time with the duration of a clock period to derive the number of clock cycles. 

module vga640x480(

input clk,

input rst,

output [7:0] LED,

output hsync,

output vsync,

output [3:0] r,

output [3:0] g,

output [3:0] b

);

parameter HSYNC = 190;

parameter HBP = (190 + 96);

parameter HVID = (190 + 96 + 1271);

parameter HFP = (190 + 96 + 1271 + 32);

parameter HTOTAL = 1589;

parameter VSYNC = 3200;

parameter VBP = (3200 + 52400);

parameter VVID = (3200 + 52400 + 762650);

parameter VFP = (3200 + 52400 + 762650 + 15900);

parameter VTOTAL = 834150;

reg [19:0] cnt;

always @ (posedge clk or negedge rst)

begin

if (~rst)

cnt <= 0;

else

begin

if(cnt < VTOTAL) cnt <= cnt + 1;

else cnt <= 0;

end

end

assign LED[0] = ~vsync;

assign LED[1] = ~hsync;

assign r[3:0] = (((VBP < cnt) && (cnt < VVID)) && ((HBP < (cnt % HTOTAL)) && ((cnt % HTOTAL) < HVID))) ? 4'b1111 : 4'b0000;

assign g[3:0] = (((VBP < cnt) && (cnt < VVID)) && ((HBP < (cnt % HTOTAL)) && ((cnt % HTOTAL) < HVID))) ? 4'b1111 : 4'b0000;

assign b[3:0] = (((VBP < cnt) && (cnt < VVID)) && ((HBP < (cnt % HTOTAL)) && ((cnt % HTOTAL) < HVID))) ? 4'b1111 : 4'b0000;

assign hsync = ((cnt % HTOTAL) < HSYNC)? 0 : 1;

assign vsync = ((cnt         ) < VSYNC)? 0 : 1;

endmodule