wire up frame/line start, interrupt

Author: sameer

Diff for: syn/mkrvidor4000_quartus/mipi-demo.sdc

@@ -1,5 +1,5 @@
 set_time_format -unit ns -decimal_places 3
-create_clock -name MIPI_CLK -period 15.38 [get_ports {MIPI_CLK}]
+#create_clock -name MIPI_CLK -period 15.38 [get_ports {MIPI_CLK}]
 create_clock -name CLK_48MHZ -period "48.0 MHz" [get_ports {CLK_48MHZ}]
 create_generated_clock -name SDRAM_CLK -source [get_pins mem_pll|altpll_component|auto_generated|pll1|clk[0]] [get_ports {SDRAM_CLK}]
 

Diff for: top/mkrvidor4000/arbiter.sv

@@ -8,6 +8,9 @@ module arbiter #(
     input logic mipi_clk,
     input logic mipi_data_enable,
     input logic [7:0] mipi_data [3:0],
+    input logic frame_start,
+    input logic line_start,
+    input logic interrupt,
 
     input logic sdram_clk,
 	output logic clock_enable,
@@ -53,12 +56,12 @@ as4c4m16sa_controller #(
     .dq(dq)
 );
 
-localparam MIPI_POINTER_WIDTH = 6;
+localparam MIPI_POINTER_WIDTH = 5;
 logic [MIPI_POINTER_WIDTH-1:0] mipi_data_out_used;
 logic mipi_data_out_acknowledge, mipi_data_in_enable;
 logic [15:0] mipi_data_in, mipi_data_out;
 
-fifo #(.DATA_WIDTH(16), .POINTER_WIDTH(MIPI_POINTER_WIDTH), .SENDER_DELAY_CHAIN_LENGTH(2)) mipi_write_fifo(
+fifo #(.DATA_WIDTH(16), .POINTER_WIDTH(MIPI_POINTER_WIDTH), .SENDER_DELAY_CHAIN_LENGTH(3)) mipi_write_fifo(
     .sender_clock(mipi_clk),
     .data_in_enable(mipi_data_in_enable),
     .data_in_used(),
@@ -70,9 +73,11 @@ fifo #(.DATA_WIDTH(16), .POINTER_WIDTH(MIPI_POINTER_WIDTH), .SENDER_DELAY_CHAIN_
 );
 
 logic mipi_data_in_countdown = 1'b0;
-// Relies on https://github.com/hdl-util/mipi-csi-2/commit/cd500bab6395de0696a728ab38a205986fd7be91
-assign mipi_data_in = mipi_data_in_countdown ? {mipi_data[3], mipi_data[2]} : {mipi_data[1], mipi_data[0]};
+assign mipi_data_in = mipi_data_in_countdown ? mipi_data_holding : {mipi_data[1], mipi_data[0]};
 assign mipi_data_in_enable = mipi_data_enable || mipi_data_in_countdown == 1'b1;
+logic [15:0] mipi_data_holding = 16'd0;
+always_ff @(posedge mipi_clk)
+    mipi_data_holding <= {mipi_data[3], mipi_data[2]};
 always_ff @(posedge mipi_clk)
     if (mipi_data_enable)
         mipi_data_in_countdown <= 1'b1;
@@ -114,6 +119,8 @@ always_ff @(posedge sdram_clk)
 
 always @(posedge sdram_clk)
 begin
+    if (interrupt && frame_start)
+        mipi_address <= 22'd0;
     if (command == 2'd0)
     begin
         if (pixel_data_in_used <= PIXEL_POINTER_WIDTH'(0) - 4'd9) // Read burst possible

Diff for: top/mkrvidor4000/mkrvidor4000_top.sv

@@ -88,7 +88,7 @@ logic ready;
 logic model_err;
 logic nack_err;
 
-ov5647 #(.INPUT_CLK_RATE(48_000_000), .TARGET_SCL_RATE(100_000)) ov5647 (
+imx219 #(.INPUT_CLK_RATE(48_000_000), .TARGET_SCL_RATE(100_000)) imx219 (
     .clk_in(CLK_48MHZ),
     .scl(MIPI_SCL),
     .sda(MIPI_SDA),
@@ -105,7 +105,7 @@ logic [7:0] image_data [3:0];
 logic [5:0] image_data_type;
 logic image_data_enable;
 logic [15:0] word_count;
-logic frame_start, frame_end;
+logic frame_start, line_start, interrupt;
 camera #(.NUM_LANES(2)) camera (
     .clock_p(MIPI_CLK),
     .data_p(MIPI_D),
@@ -114,7 +114,8 @@ camera #(.NUM_LANES(2)) camera (
     .image_data_enable(image_data_enable),
     .word_count(word_count),
     .frame_start(frame_start),
-    .frame_end(frame_end)
+    .line_start(line_start),
+    .interrupt(interrupt)
 );
 
 // logic [7:0] raw [3:0];
@@ -142,6 +143,9 @@ arbiter arbiter (
     .mipi_clk(MIPI_CLK),
     .mipi_data_enable(image_data_enable),
     .mipi_data(image_data),
+    .frame_start(frame_start),
+    .line_start(line_start),
+    .interrupt(interrupt),
     .sdram_clk(SDRAM_CLK),
     .clock_enable(SDRAM_CKE),
     .bank_activate(SDRAM_BA),