frame buffer testin

Author: outercloudstudio

RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/new/VGATop.v

@@ -41,13 +41,11 @@ module VGATop(
         .reset          (btnC),
         .io_address     (32'h0),
         .io_write       (vga_write),
-        .io_write_value (32'hFFF),
+        .io_write_value (32'hFF),
         .io_hsync       (vgaHSync),
         .io_vsync       (vgaVSync),
         .io_rgb         (rgb),
-        .io_blanking    (blanking),
-        .io_hPos        (),
-        .io_vPos        ()
+        .io_blanking    (blanking)
     );
 
     assign vgaRed   = blanking ? 4'h0 : rgb[11:8];

RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.xpr

@@ -154,7 +154,7 @@
           <Attr Name="UsedIn" Val="simulation"/>
         </FileInfo>
       </File>
-      <File Path="$PPRDIR/../generated/memory_76800x8.sv">
+      <File Path="$PPRDIR/../generated/memory_1024x32_0.sv">
         <FileInfo>
           <Attr Name="AutoDisabled" Val="1"/>
           <Attr Name="UsedIn" Val="synthesis"/>
@@ -169,7 +169,7 @@
           <Attr Name="UsedIn" Val="simulation"/>
         </FileInfo>
       </File>
-      <File Path="$PPRDIR/../generated/memory_1024x32_0.sv">
+      <File Path="$PPRDIR/../generated/memory_76800x8.sv">
         <FileInfo>
           <Attr Name="UsedIn" Val="synthesis"/>
           <Attr Name="UsedIn" Val="implementation"/>

src/main/scala/RISCV/VGAController.scala

@@ -28,14 +28,11 @@ class VGAController extends Module {
         val blanking = Output(Bool())
     })
 
-    val memory = SyncReadMem(1024, UInt(32.W))
+    val memory = SyncReadMem(320 * 240, UInt(8.W))
 
     val hCount = RegInit(0.U(10.W))
     val vCount = RegInit(0.U(10.W))
 
-    val pixel = WireInit(0.U(12.W))
-    pixel := memory.read(0.U, true.B)
-
     when(io.write) {
         memory.write(io.address, io.write_value)
     }
@@ -66,6 +63,16 @@ class VGAController extends Module {
 
     io.blanking := !active
 
+    val read_address = WireInit(0.U(32.W))
+
+    when(active) {
+        read_address := 0.U
+    }.otherwise {
+        read_address := vCount * 320.U + hCount
+    }
+
+    val color = memory.read(read_address, true.B)
+    val pixel = color(7, 5) ## color(5) ## color(4, 2) ## color(2) ## color(1, 0) ## color(0) ## color(0)
+
     io.rgb := Mux(active, pixel, 0.U)
-    // io.rgb := Mux(active, 0b111111111111.U, 0.U)
 }