diff options
| -rw-r--r-- | rtl/vga.sv | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/rtl/vga.sv b/rtl/vga.sv new file mode 100644 index 0000000..4ff0ad1 --- /dev/null +++ b/rtl/vga.sv @@ -0,0 +1,45 @@ +`define COORD_BITS 10 + +`define VGA_PIXCLK_HZ 25_175_000 + +module vga +( + input logic clk, + input logic rst_n, + + output logic[25:0] avl_address, + output logic avl_read, + input logic[31:0] avl_readdata, + input logic avl_waitrequest, + + output logic vga_clk, + vga_hsync, + vga_vsync, + vga_blank_n, + vga_sync_n, + output logic[7:0] vga_r, + vga_g, + vga_b +); + + localparam H_ACTIVE = `COORD_BITS'd640; + localparam H_FPORCH = `COORD_BITS'd16; + localparam H_SYNC = `COORD_BITS'd96; + localparam H_BPORCH = `COORD_BITS'd48; + localparam V_ACTIVE = `COORD_BITS'd480; + localparam V_FPORCH = `COORD_BITS'd11; + localparam V_SYNC = `COORD_BITS'd2; + localparam V_BPORCH = `COORD_BITS'd31; + + localparam H_SYNC_AT = H_BPORCH + H_ACTIVE + H_FPORCH; + localparam H_TOTAL = H_SYNC_AT + H_SYNC; + localparam V_SYNC_AT = V_BPORCH + V_ACTIVE + V_FPORCH; + localparam V_TOTAL = V_SYNC_AT + V_SYNC; + + logic[7:0] r, g, b; + + assign vga_clk = clk; + assign vga_blank_n = 1; + assign vga_sync_n = 0; + +endmodule |