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Commit 972f3782 authored by Andrey Filippov's avatar Andrey Filippov
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deleted files that are now present in x393 repository

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.project
View file @ 972f3782
......@@ -52,87 +52,87 @@
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<name>vivado_logs/VivadoRoute.log</name>
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utils/fifo_sameclock_control.v deleted 100644 → 0
View file @ 33a780fb
/*******************************************************************************
* Module: fifo_sameclock_control
* Date:2016-01-20
* Author: andrey
* Description: BRAM-based fifo control, uses BARM output registers
*
* Copyright (c) 2016 Elphel, Inc .
* fifo_sameclock_control.v is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* fifo_sameclock_control.v is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/> .
*******************************************************************************/
`timescale 1ns/1ps
module fifo_sameclock_control#(
parameter WIDTH = 9
)(
input clk,
input rst, // clock-sync reset
input wr, // write to FIFO (also applied directly to memory)
input rd, // read from FIFO, internally masked by nempty
output nempty, // at read side
output [WIDTH:0] fill_in, // valid at write side, latency 1 for read
output reg [WIDTH-1:0] mem_wa,
output reg [WIDTH-1:0] mem_ra,
output mem_re,
output mem_regen,
output reg over,
output reg under
);
reg [WIDTH:0] fill_ram;
reg ramo_full;
reg rreg_full;
assign mem_regen = mem_regen;
assign mem_re = (|fill_ram) && (!ramo_full || !rreg_full || rd);
assign mem_regen = ramo_full && (!rreg_full || rd);
assign nempty = rreg_full;
assign fill_in = fill_ram;
always @ (posedge clk) begin
if (rst) mem_wa <= 0;
else if (wr) mem_wa <= mem_wa + 1;
if (rst) mem_ra <= 0;
else if (mem_re) mem_ra <= mem_ra + 1;
if (rst) fill_ram <= 0;
else if (wr ^ mem_re) fill_ram <= mem_regen ? (fill_ram +1) : (fill_ram - 1);
if (rst) ramo_full <= 0;
else if (mem_re ^ mem_regen) ramo_full <= mem_re;
if (rst) rreg_full <= 0;
else if (mem_regen ^ (rd && rreg_full)) rreg_full <= mem_regen;
if (rst) under <= 0;
else under <= rd && ! rreg_full;
if (rst) over <= 0;
else over <= wr && fill_ram[WIDTH] && !fill_ram[WIDTH-1];
end
endmodule
utils/ramt_var_wb_var_r.v deleted 100644 → 0
View file @ 33a780fb
This diff is collapsed.
utils/resync_data.v deleted 100644 → 0
View file @ 33a780fb
/*******************************************************************************
* Module: resync_data
* Date:2015-12-22
* Author: Andrey Filippov
* Description: Resynchronize data between clock domains. No over/underruns
* are checker, start with half FIFO full. Async reset sets
* specifies output values regardless of the clocks
*
* Copyright (c) 2014 Elphel, Inc.
* resync_data.v is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* resync_data.v is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/> .
*
* Additional permission under GNU GPL version 3 section 7:
* If you modify this Program, or any covered work, by linking or combining it
* with independent modules provided by the FPGA vendor only (this permission
* does not extend to any 3-rd party modules, "soft cores" or macros) under
* different license terms solely for the purpose of generating binary "bitstream"
* files and/or simulating the code, the copyright holders of this Program give
* you the right to distribute the covered work without those independent modules
* as long as the source code for them is available from the FPGA vendor free of
* charge, and there is no dependence on any encrypted modules for simulating of
* the combined code. This permission applies to you if the distributed code
* contains all the components and scripts required to completely simulate it
* with at least one of the Free Software programs.
*******************************************************************************/
`timescale 1ns/1ps
module resync_data
#(
parameter integer DATA_WIDTH=16,
parameter integer DATA_DEPTH=4, // >= 2
parameter INITIAL_VALUE = 0
) (
input arst, // async reset, active high (global)
input srst, // same as arst, but relies on the clocks
input wclk, // write clock - positive edge
input rclk, // read clock - positive edge
input we, // write enable
input re, // read enable
input [DATA_WIDTH-1:0] data_in, // input data
output reg [DATA_WIDTH-1:0] data_out, // output data
output reg valid // data valid @ rclk
);
localparam integer DATA_2DEPTH=(1<<DATA_DEPTH)-1;
reg [DATA_WIDTH-1:0] ram [0:DATA_2DEPTH];
reg [DATA_DEPTH-1:0] raddr;
reg [DATA_DEPTH-1:0] waddr;
reg [1:0] rrst = 3;
always @ (posedge rclk or posedge arst) begin
if (arst) valid <= 0;
else if (srst) valid <= 0;
else if (&waddr[DATA_DEPTH-2:0] && we) valid <= 1; // just once set and stays until reset
end
always @ (posedge wclk or posedge arst) begin
if (arst) waddr <= 0;
else if (srst) waddr <= 0;
else if (we) waddr <= waddr + 1;
end
always @ (posedge rclk or posedge arst) begin
if (arst) rrst <= 3;
else if (srst) rrst <= 3; // resync to rclk
else rrst <= rrst << 1;
if (arst) raddr <= 0;
else if (rrst[0]) raddr <= 0;
else if (re || rrst[1]) raddr <= raddr + 1;
if (arst) data_out <= INITIAL_VALUE;
else if (rrst[0]) data_out <= INITIAL_VALUE;
else if (re || rrst[1]) data_out <= ram[raddr];
end
always @ (posedge wclk) begin
if (we) ram[waddr] <= data_in;
end
endmodule
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