RomanRom2/ossc
1
0 Fork 0
mirror of https://github.com/marqs85/ossc synced 2026-11-05 14:40:08 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

improve TVP7002 frontend sync detection

Browse Source 
Store csync leading edge position so that field change timing can be calculated accurately upon VSYNC detection
This commit is contained in:
marqs committed 2023-03-11 12:32:26 +02:00
1 parent a825bb048c
commit df643ec742
2 files changed
+23 -13
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

rtl/ossc.v
+5
View File
@@ -102,6 +102,7 @@ wire sys_reset_n = (po_reset_n & ~jtagm_reset_req);
reg [7:0] TVP_R, TVP_G, TVP_B;
reg TVP_HS, TVP_VS, TVP_FID;
reg TVP_VS_sync1_reg, TVP_VS_sync2_reg;
reg TVP_SOG_sync1_reg, TVP_SOG_sync2_reg, TVP_SOG_prev;
reg TVP_HSYNC_sync1_reg, TVP_HSYNC_sync2_reg;
reg TVP_VSYNC_sync1_reg, TVP_VSYNC_sync2_reg;
@@ -157,6 +158,9 @@ always @(posedge TVP_PCLK_i) begin
TVP_FID <= TVP_FID_i;
// sync to pclk
TVP_SOG_sync1_reg <= TVP_HSYNC_i;
TVP_SOG_sync2_reg <= TVP_SOG_sync1_reg;
TVP_SOG_prev <= TVP_SOG_sync2_reg;
TVP_VS_sync1_reg <= TVP_VSYNC_i;
TVP_VS_sync2_reg <= TVP_VS_sync1_reg;
end
@@ -186,6 +190,7 @@ tvp7002_frontend u_tvp_frontend (
.VSYNC_i(TVP_VSYNC_sync2_reg),
.DE_i(1'b0),
.FID_i(1'b0),
.sogref_update_i(TVP_SOG_prev & ~TVP_SOG_sync2_reg),
.vsync_i_type(tvp_vsync_type),
.hv_in_config(hv_in_config),
.hv_in_config2(hv_in_config2),