uzix/TSConf_MiST
1
0
Fork 0
mirror of https://github.com/UzixLS/TSConf_MiST.git synced 2025-07-18 23:01:37 +03:00
Code Issues Packages Projects Releases Wiki Activity

Update sys. Re-organize the sources.

Browse Source
This commit is contained in:
sorgelig
2020-05-11 23:17:53 +08:00
parent 0c1cb37dba
commit 5a66d5ec1c
102 changed files with 1996 additions and 1364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

175
sys/video_mixer.sv
View File

@ -17,17 +17,21 @@
// HALF_DEPTH: If =1 then color dept is 4 bits per component
// For half depth 8 bits monochrome is available with
// mono signal enabled and color = {G, R}
//
// altera message_off 10720
// altera message_off 12161
module video_mixer
#(
parameter LINE_LENGTH = 768,
parameter HALF_DEPTH = 0
parameter HALF_DEPTH = 0,
parameter GAMMA = 0
)
(
// master clock
// video clock
// it should be multiple by (ce_pix*4).
input clk_sys,
input clk_vid,
// Pixel clock or clock_enable (both are accepted).
input ce_pix,
output ce_pix_out,
@ -48,6 +52,8 @@ module video_mixer
// Monochrome mode (for HALF_DEPTH only)
input mono,
inout [21:0] gamma_bus,
// Positive pulses.
input HSync,
input VSync,
@ -64,22 +70,74 @@ module video_mixer
);
localparam DWIDTH = HALF_DEPTH ? 3 : 7;
localparam DWIDTH_SD = GAMMA ? 7 : DWIDTH;
localparam HALF_DEPTH_SD = GAMMA ? 0 : HALF_DEPTH;
wire [DWIDTH:0] R_sd;
wire [DWIDTH:0] G_sd;
wire [DWIDTH:0] B_sd;
generate
if(GAMMA && HALF_DEPTH) begin
wire [7:0] R_in = mono ? {G,R} : {R,R};
wire [7:0] G_in = mono ? {G,R} : {G,G};
wire [7:0] B_in = mono ? {G,R} : {B,B};
end else begin
wire [DWIDTH:0] R_in = R;
wire [DWIDTH:0] G_in = G;
wire [DWIDTH:0] B_in = B;
end
endgenerate
wire hs_g, vs_g;
wire hb_g, vb_g;
wire [DWIDTH_SD:0] R_gamma, G_gamma, B_gamma;
generate
if(GAMMA) begin
assign gamma_bus[21] = 1;
gamma_corr gamma(
.clk_sys(gamma_bus[20]),
.clk_vid(clk_vid),
.ce_pix(ce_pix),
.gamma_en(gamma_bus[19]),
.gamma_wr(gamma_bus[18]),
.gamma_wr_addr(gamma_bus[17:8]),
.gamma_value(gamma_bus[7:0]),
.HSync(HSync),
.VSync(VSync),
.HBlank(HBlank),
.VBlank(VBlank),
.RGB_in({R_in,G_in,B_in}),
.HSync_out(hs_g),
.VSync_out(vs_g),
.HBlank_out(hb_g),
.VBlank_out(vb_g),
.RGB_out({R_gamma,G_gamma,B_gamma})
);
end else begin
assign gamma_bus[21] = 0;
assign {R_gamma,G_gamma,B_gamma} = {R_in,G_in,B_in};
assign {hs_g, vs_g, hb_g, vb_g} = {HSync, VSync, HBlank, VBlank};
end
endgenerate
wire [DWIDTH_SD:0] R_sd;
wire [DWIDTH_SD:0] G_sd;
wire [DWIDTH_SD:0] B_sd;
wire hs_sd, vs_sd, hb_sd, vb_sd, ce_pix_sd;
scandoubler #(.LENGTH(LINE_LENGTH), .HALF_DEPTH(HALF_DEPTH)) sd
scandoubler #(.LENGTH(LINE_LENGTH), .HALF_DEPTH(HALF_DEPTH_SD)) sd
(
.*,
.hs_in(HSync),
.vs_in(VSync),
.hb_in(HBlank),
.vb_in(VBlank),
.r_in(R),
.g_in(G),
.b_in(B),
.hs_in(hs_g),
.vs_in(vs_g),
.hb_in(hb_g),
.vb_in(vb_g),
.r_in(R_gamma),
.g_in(G_gamma),
.b_in(B_gamma),
.ce_pix_out(ce_pix_sd),
.hs_out(hs_sd),
@ -91,12 +149,12 @@ scandoubler #(.LENGTH(LINE_LENGTH), .HALF_DEPTH(HALF_DEPTH)) sd
.b_out(B_sd)
);
wire [DWIDTH:0] rt = (scandoubler ? R_sd : R);
wire [DWIDTH:0] gt = (scandoubler ? G_sd : G);
wire [DWIDTH:0] bt = (scandoubler ? B_sd : B);
wire [DWIDTH_SD:0] rt = (scandoubler ? R_sd : R_gamma);
wire [DWIDTH_SD:0] gt = (scandoubler ? G_sd : G_gamma);
wire [DWIDTH_SD:0] bt = (scandoubler ? B_sd : B_gamma);
generate
if(HALF_DEPTH) begin
if(!GAMMA && HALF_DEPTH) begin
wire [7:0] r = mono ? {gt,rt} : {rt,rt};
wire [7:0] g = mono ? {gt,rt} : {gt,gt};
wire [7:0] b = mono ? {gt,rt} : {bt,bt};
@ -107,14 +165,14 @@ generate
end
endgenerate
wire hs = (scandoubler ? hs_sd : HSync);
wire vs = (scandoubler ? vs_sd : VSync);
wire hs = (scandoubler ? hs_sd : hs_g);
wire vs = (scandoubler ? vs_sd : vs_g);
assign ce_pix_out = scandoubler ? ce_pix_sd : ce_pix;
reg scanline = 0;
always @(posedge clk_sys) begin
always @(posedge clk_vid) begin
reg old_hs, old_vs;
old_hs <= hs;
@ -124,44 +182,57 @@ always @(posedge clk_sys) begin
if(old_vs && ~vs) scanline <= 0;
end
wire hde = scandoubler ? ~hb_sd : ~HBlank;
wire vde = scandoubler ? ~vb_sd : ~VBlank;
wire hde = scandoubler ? ~hb_sd : ~hb_g;
wire vde = scandoubler ? ~vb_sd : ~vb_g;
always @(posedge clk_sys) begin
reg [7:0] v_r,v_g,v_b;
reg v_vs,v_hs,v_de;
always @(posedge clk_vid) begin
reg old_hde;
case(scanlines & {scanline, scanline})
1: begin // reduce 25% = 1/2 + 1/4
VGA_R <= {1'b0, r[7:1]} + {2'b00, r[7:2]};
VGA_G <= {1'b0, g[7:1]} + {2'b00, g[7:2]};
VGA_B <= {1'b0, b[7:1]} + {2'b00, b[7:2]};
end
if(ce_pix_out) begin
case(scanlines & {scanline, scanline})
1: begin // reduce 25% = 1/2 + 1/4
v_r <= {1'b0, r[7:1]} + {2'b00, r[7:2]};
v_g <= {1'b0, g[7:1]} + {2'b00, g[7:2]};
v_b <= {1'b0, b[7:1]} + {2'b00, b[7:2]};
end
2: begin // reduce 50% = 1/2
VGA_R <= {1'b0, r[7:1]};
VGA_G <= {1'b0, g[7:1]};
VGA_B <= {1'b0, b[7:1]};
end
2: begin // reduce 50% = 1/2
v_r <= {1'b0, r[7:1]};
v_g <= {1'b0, g[7:1]};
v_b <= {1'b0, b[7:1]};
end
3: begin // reduce 75% = 1/4
VGA_R <= {2'b00, r[7:2]};
VGA_G <= {2'b00, g[7:2]};
VGA_B <= {2'b00, b[7:2]};
end
3: begin // reduce 75% = 1/4
v_r <= {2'b00, r[7:2]};
v_g <= {2'b00, g[7:2]};
v_b <= {2'b00, b[7:2]};
end
default: begin
VGA_R <= r;
VGA_G <= g;
VGA_B <= b;
end
endcase
default: begin
v_r <= r;
v_g <= g;
v_b <= b;
end
endcase
VGA_VS <= vs;
VGA_HS <= hs;
v_vs <= vs;
v_hs <= hs;
old_hde <= hde;
if(~old_hde && hde) VGA_DE <= vde;
if(old_hde && ~hde) VGA_DE <= 0;
old_hde <= hde;
if(~old_hde && hde) v_de <= vde;
if(old_hde && ~hde) v_de <= 0;
end
end
always @(posedge clk_vid) if(ce_pix_out) begin
VGA_R <= v_r;
VGA_G <= v_g;
VGA_B <= v_b;
VGA_HS <= v_hs;
VGA_VS <= v_vs;
VGA_DE <= v_de;
end
endmodule