summaryrefslogtreecommitdiff
path: root/rtl/gfx/gfx_sp_widener.sv
diff options
context:
space:
mode:
authorAlejandro Soto <alejandro@34project.org>2024-05-05 17:34:22 -0600
committerAlejandro Soto <alejandro@34project.org>2024-05-05 17:38:27 -0600
commit081a8a3ba8bfe036f31da53f9c041a2caa30fce2 (patch)
tree7d712b67d3dc1ad3d37041562774ba3c4e5a7f49 /rtl/gfx/gfx_sp_widener.sv
parente5b64ea353678baabd16d245fcfaa3384e1acf8f (diff)
rtl/legacy_gfx: rename gfx -> legacy_gfx
Diffstat (limited to 'rtl/gfx/gfx_sp_widener.sv')
-rw-r--r--rtl/gfx/gfx_sp_widener.sv63
1 files changed, 0 insertions, 63 deletions
diff --git a/rtl/gfx/gfx_sp_widener.sv b/rtl/gfx/gfx_sp_widener.sv
deleted file mode 100644
index 92101ca..0000000
--- a/rtl/gfx/gfx_sp_widener.sv
+++ /dev/null
@@ -1,63 +0,0 @@
-`include "gfx/gfx_defs.sv"
-
-module gfx_sp_widener
-#(parameter WIDTH=0) // Quartus no soporta 'parameter type'
-(
- input logic clk,
- rst_n,
-
- input logic word_waitrequest,
- word_readdatavalid,
- input vram_word word_readdata,
- output vram_addr word_address,
- output logic word_read,
-
- input logic wide_read,
- input logic[WIDTH - 1:0] wide_address,
- output logic wide_waitrequest,
- wide_readdatavalid,
-
- output logic[DATA_WIDTH - 1:0] wide_readdata
-);
-
- // Este módulo existe para fingir que la DE1-SoC tiene un bus de SDRAM más ancho
-
- localparam WIDE_BITS = $bits(vram_addr) - WIDTH,
- WIDE_SIZE = 1 << WIDE_BITS,
- DATA_WIDTH = $bits(vram_word) << WIDE_BITS;
-
- vram_word shift_in[WIDE_SIZE];
- logic[WIDE_BITS - 1:0] address_count, read_count;
-
- assign word_read = wide_read;
- assign word_address = {wide_address, address_count};
- assign wide_waitrequest = word_waitrequest || !(&address_count);
-
- always_comb
- for (integer i = 0; i < WIDE_SIZE; ++i)
- wide_readdata[$bits(vram_word) * i +: $bits(vram_word)] = shift_in[i];
-
- always_ff @(posedge clk or negedge rst_n)
- if (!rst_n) begin
- read_count <= 0;
- address_count <= 0;
- wide_readdatavalid <= 0;
- end else begin
- if (word_read && !word_waitrequest)
- address_count <= address_count + 1;
-
- if (word_readdatavalid)
- read_count <= read_count + 1;
-
- wide_readdatavalid <= word_readdatavalid && &read_count;
- end
-
- always_ff @(posedge clk)
- if (word_readdatavalid) begin
- for (integer i = 0; i < WIDE_SIZE - 1; ++i)
- shift_in[i] <= shift_in[i + 1];
-
- shift_in[WIDE_SIZE - 1] <= word_readdata;
- end
-
-endmodule