Visible to Intel only — GUID: hco1410462423517
Ixiasoft
Visible to Intel only — GUID: hco1410462423517
Ixiasoft
6.6.6. Clocked Video Input Interface
The rxN_video_out interface may interface with a clocked video input (CVI). CVI accepts the following video signals with a separate synchronization mode: datavalid, de, h_sync, v_sync, f, locked, and data.
The DisplayPort rxN_video_out interface has the following signals: rxN_vid_valid, rxN_vid_sol, rxN_vid_eol, rxN_vid_sof, rxN_vid_eof, rxN_vid_locked, and rxN_vid_data.
CVI Signal |
DisplayPort Sink Signal |
Comment |
---|---|---|
vid_data | rx_vid_data | Video data |
vid_datavalid | – |
Drive high because the video data is not oversampled. |
vid_f | rx_vid_field |
Drive low because the video data is progressive. |
vid_locked | rx_vid_locked | The core asserts this signal when a stable stream is present. |
vid_de | rx_vid_valid | Indicates the active picture region of a line. |
vid_h_sync | rx_vid_eol | The rx_vid_eol signal generates the vid_h_sync pulse by delaying it (by 1 clock cycle) to appear in the horizontal blanking period after the active video ends (rx_vid_valid is deasserted). |
vid_v_sync | rx_vid_eof | The rx_vid_eof signal generates the vid_v_sync pulse by delaying it (by 1 clock cycle) to appear in the vertical blanking period after the active video ends (rx_vid_valid is deasserted). |
Verilog HDL CVI — DisplayPort Sink Example
// CVI V-sync and H-sync are derived from delayed versions of the eol and eof signals
always @ (posedge clk_video)
begin
rx_vid_h_sync <= rx_vid_eol;
rx_vid_v_sync <= rx_vid_eof;
end
assign vid_data = rx_vid_data;
assign vid_datavalid = 1’b1;
assign vid_f = 1’b0;
assign vid_locked = rx_vid_locked;
assign vid_h_sync = rx_vid_h_sync;
assign vid_de = rx_vid_valid;
assign vid_v_sync = rx_vid_v_sync;