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//*****************************************************************************
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// (c) Copyright 2008 - 2013 Xilinx, Inc. All rights reserved.
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//
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// This file contains confidential and proprietary information
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// of Xilinx, Inc. and is protected under U.S. and
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// international copyright and other intellectual property
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// laws.
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//
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// DISCLAIMER
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// This disclaimer is not a license and does not grant any
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// rights to the materials distributed herewith. Except as
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// otherwise provided in a valid license issued to you by
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// Xilinx, and to the maximum extent permitted by applicable
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// law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
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// WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
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// AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
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// BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
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// INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
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// (2) Xilinx shall not be liable (whether in contract or tort,
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// including negligence, or under any other theory of
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// liability) for any loss or damage of any kind or nature
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// related to, arising under or in connection with these
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// materials, including for any direct, or any indirect,
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// special, incidental, or consequential loss or damage
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// (including loss of data, profits, goodwill, or any type of
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// loss or damage suffered as a result of any action brought
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// by a third party) even if such damage or loss was
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// reasonably foreseeable or Xilinx had been advised of the
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// possibility of the same.
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//
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// CRITICAL APPLICATIONS
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// Xilinx products are not designed or intended to be fail-
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// safe, or for use in any application requiring fail-safe
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// performance, such as life-support or safety devices or
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// systems, Class III medical devices, nuclear facilities,
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// applications related to the deployment of airbags, or any
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// other applications that could lead to death, personal
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// injury, or severe property or environmental damage
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// (individually and collectively, "Critical
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// Applications"). Customer assumes the sole risk and
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// liability of any use of Xilinx products in Critical
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// Applications, subject only to applicable laws and
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// regulations governing limitations on product liability.
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//
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// THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
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// PART OF THIS FILE AT ALL TIMES.
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//
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//*****************************************************************************
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// ____ ____
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// / /\/ /
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// /___/ \ / Vendor : Xilinx
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// \ \ \/ Version : %version
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// \ \ Application : MIG
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// / / Filename : mig_7series_v2_3_tempmon.v
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// /___/ /\ Date Last Modified : $date$
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// \ \ / \ Date Created : Jul 25 2012
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// \___\/\___\
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//
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//Device : 7 Series
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//Design Name : DDR3 SDRAM
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//Purpose : Monitors chip temperature via the XADC and adjusts the
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// stage 2 tap values as appropriate.
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//Reference :
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//Revision History :
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//*****************************************************************************
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`timescale 1 ps / 1 ps
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module mig_7series_v2_3_tempmon #
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(
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parameter TCQ = 100, // Register delay (sim only)
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parameter TEMP_MON_CONTROL = "INTERNAL", // XADC or user temperature source
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parameter XADC_CLK_PERIOD = 5000, // pS (default to 200 MHz refclk)
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parameter tTEMPSAMPLE = 10000000 // ps (10 us)
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)
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(
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input clk, // Fabric clock
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input xadc_clk,
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input rst, // System reset
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input [11:0] device_temp_i, // User device temperature
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output [11:0] device_temp // Sampled temperature
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);
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//***************************************************************************
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// Function cdiv
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// Description:
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// This function performs ceiling division (divide and round-up)
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// Inputs:
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// num: integer to be divided
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// div: divisor
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// Outputs:
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// cdiv: result of ceiling division (num/div, rounded up)
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//***************************************************************************
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function integer cdiv (input integer num, input integer div);
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begin
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// perform division, then add 1 if and only if remainder is non-zero
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cdiv = (num/div) + (((num%div)>0) ? 1 : 0);
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end
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endfunction // cdiv
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//***************************************************************************
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// Function clogb2
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// Description:
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// This function performs binary logarithm and rounds up
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// Inputs:
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// size: integer to perform binary log upon
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// Outputs:
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// clogb2: result of binary logarithm, rounded up
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//***************************************************************************
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function integer clogb2 (input integer size);
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begin
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size = size - 1;
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// increment clogb2 from 1 for each bit in size
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for (clogb2 = 1; size > 1; clogb2 = clogb2 + 1)
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size = size >> 1;
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end
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endfunction // clogb2
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// Synchronization registers
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_sync_r1;
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_sync_r2;
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_sync_r3 /* synthesis syn_srlstyle="registers" */;
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_sync_r4;
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_sync_r5;
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// Output register
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(* ASYNC_REG = "TRUE" *) reg [11:0] device_temp_r;
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wire [11:0] device_temp_lcl;
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reg [3:0] sync_cntr = 4'b0000;
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reg device_temp_sync_r4_neq_r3;
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// (* ASYNC_REG = "TRUE" *) reg rst_r1;
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// (* ASYNC_REG = "TRUE" *) reg rst_r2;
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// // Synchronization rst to XADC clock domain
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// always @(posedge xadc_clk) begin
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// rst_r1 <= rst;
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// rst_r2 <= rst_r1;
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// end
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// Synchronization counter
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always @(posedge clk) begin
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device_temp_sync_r1 <= #TCQ device_temp_lcl;
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device_temp_sync_r2 <= #TCQ device_temp_sync_r1;
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device_temp_sync_r3 <= #TCQ device_temp_sync_r2;
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device_temp_sync_r4 <= #TCQ device_temp_sync_r3;
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device_temp_sync_r5 <= #TCQ device_temp_sync_r4;
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device_temp_sync_r4_neq_r3 <= #TCQ (device_temp_sync_r4 != device_temp_sync_r3) ? 1'b1 : 1'b0;
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end
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always @(posedge clk)
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if(rst || (device_temp_sync_r4_neq_r3))
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sync_cntr <= #TCQ 4'b0000;
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else if(~&sync_cntr)
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sync_cntr <= #TCQ sync_cntr + 4'b0001;
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always @(posedge clk)
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if(&sync_cntr)
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device_temp_r <= #TCQ device_temp_sync_r5;
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assign device_temp = device_temp_r;
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generate
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if(TEMP_MON_CONTROL == "EXTERNAL") begin : user_supplied_temperature
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assign device_temp_lcl = device_temp_i;
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end else begin : xadc_supplied_temperature
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// calculate polling timer width and limit
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localparam nTEMPSAMP = cdiv(tTEMPSAMPLE, XADC_CLK_PERIOD);
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localparam nTEMPSAMP_CLKS = nTEMPSAMP;
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localparam nTEMPSAMP_CLKS_M6 = nTEMPSAMP - 6;
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localparam nTEMPSAMP_CNTR_WIDTH = clogb2(nTEMPSAMP_CLKS);
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// Temperature sampler FSM encoding
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localparam INIT_IDLE = 2'b00;
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localparam REQUEST_READ_TEMP = 2'b01;
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localparam WAIT_FOR_READ = 2'b10;
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localparam READ = 2'b11;
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// polling timer and tick
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reg [nTEMPSAMP_CNTR_WIDTH-1:0] sample_timer = {nTEMPSAMP_CNTR_WIDTH{1'b0}};
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reg sample_timer_en = 1'b0;
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reg sample_timer_clr = 1'b0;
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reg sample_en = 1'b0;
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// Temperature sampler state
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reg [2:0] tempmon_state = INIT_IDLE;
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reg [2:0] tempmon_next_state = INIT_IDLE;
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// XADC interfacing
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reg xadc_den = 1'b0;
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wire xadc_drdy;
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wire [15:0] xadc_do;
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reg xadc_drdy_r = 1'b0;
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reg [15:0] xadc_do_r = 1'b0;
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// Temperature storage
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reg [11:0] temperature = 12'b0;
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// Reset sync
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(* ASYNC_REG = "TRUE" *) reg rst_r1;
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(* ASYNC_REG = "TRUE" *) reg rst_r2;
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// Synchronization rst to XADC clock domain
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always @(posedge xadc_clk) begin
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rst_r1 <= rst;
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rst_r2 <= rst_r1;
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end
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// XADC polling interval timer
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always @ (posedge xadc_clk)
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if(rst_r2 || sample_timer_clr)
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sample_timer <= #TCQ {nTEMPSAMP_CNTR_WIDTH{1'b0}};
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else if(sample_timer_en)
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sample_timer <= #TCQ sample_timer + 1'b1;
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// XADC sampler state transition
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always @(posedge xadc_clk)
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if(rst_r2)
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tempmon_state <= #TCQ INIT_IDLE;
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else
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tempmon_state <= #TCQ tempmon_next_state;
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// Sample enable
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always @(posedge xadc_clk)
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sample_en <= #TCQ (sample_timer == nTEMPSAMP_CLKS_M6) ? 1'b1 : 1'b0;
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// XADC sampler next state transition
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always @(tempmon_state or sample_en or xadc_drdy_r) begin
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tempmon_next_state = tempmon_state;
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case(tempmon_state)
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INIT_IDLE:
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if(sample_en)
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tempmon_next_state = REQUEST_READ_TEMP;
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REQUEST_READ_TEMP:
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tempmon_next_state = WAIT_FOR_READ;
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WAIT_FOR_READ:
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if(xadc_drdy_r)
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tempmon_next_state = READ;
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READ:
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tempmon_next_state = INIT_IDLE;
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default:
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tempmon_next_state = INIT_IDLE;
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endcase
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end
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// Sample timer clear
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always @(posedge xadc_clk)
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if(rst_r2 || (tempmon_state == WAIT_FOR_READ))
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sample_timer_clr <= #TCQ 1'b0;
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else if(tempmon_state == REQUEST_READ_TEMP)
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sample_timer_clr <= #TCQ 1'b1;
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// Sample timer enable
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always @(posedge xadc_clk)
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if(rst_r2 || (tempmon_state == REQUEST_READ_TEMP))
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sample_timer_en <= #TCQ 1'b0;
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else if((tempmon_state == INIT_IDLE) || (tempmon_state == READ))
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sample_timer_en <= #TCQ 1'b1;
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// XADC enable
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always @(posedge xadc_clk)
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if(rst_r2 || (tempmon_state == WAIT_FOR_READ))
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xadc_den <= #TCQ 1'b0;
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else if(tempmon_state == REQUEST_READ_TEMP)
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xadc_den <= #TCQ 1'b1;
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// Register XADC outputs
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always @(posedge xadc_clk)
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if(rst_r2) begin
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xadc_drdy_r <= #TCQ 1'b0;
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xadc_do_r <= #TCQ 16'b0;
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end
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else begin
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xadc_drdy_r <= #TCQ xadc_drdy;
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xadc_do_r <= #TCQ xadc_do;
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end
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// Store current read value
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always @(posedge xadc_clk)
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if(rst_r2)
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temperature <= #TCQ 12'b0;
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else if(tempmon_state == READ)
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temperature <= #TCQ xadc_do_r[15:4];
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assign device_temp_lcl = temperature;
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// XADC: Dual 12-Bit 1MSPS Analog-to-Digital Converter
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// 7 Series
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// Xilinx HDL Libraries Guide, version 14.1
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XADC #(
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// INIT_40 - INIT_42: XADC configuration registers
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.INIT_40(16'h1000), // config reg 0
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.INIT_41(16'h2fff), // config reg 1
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.INIT_42(16'h0800), // config reg 2
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// INIT_48 - INIT_4F: Sequence Registers
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.INIT_48(16'h0101), // Sequencer channel selection
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.INIT_49(16'h0000), // Sequencer channel selection
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.INIT_4A(16'h0100), // Sequencer Average selection
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.INIT_4B(16'h0000), // Sequencer Average selection
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.INIT_4C(16'h0000), // Sequencer Bipolar selection
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.INIT_4D(16'h0000), // Sequencer Bipolar selection
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.INIT_4E(16'h0000), // Sequencer Acq time selection
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.INIT_4F(16'h0000), // Sequencer Acq time selection
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// INIT_50 - INIT_58, INIT5C: Alarm Limit Registers
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.INIT_50(16'hb5ed), // Temp alarm trigger
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.INIT_51(16'h57e4), // Vccint upper alarm limit
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.INIT_52(16'ha147), // Vccaux upper alarm limit
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.INIT_53(16'hca33), // Temp alarm OT upper
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.INIT_54(16'ha93a), // Temp alarm reset
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.INIT_55(16'h52c6), // Vccint lower alarm limit
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.INIT_56(16'h9555), // Vccaux lower alarm limit
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.INIT_57(16'hae4e), // Temp alarm OT reset
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.INIT_58(16'h5999), // VBRAM upper alarm limit
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.INIT_5C(16'h5111), // VBRAM lower alarm limit
|
338 |
|
|
// Simulation attributes: Set for proepr simulation behavior
|
339 |
|
|
.SIM_DEVICE("7SERIES") // Select target device (values)
|
340 |
|
|
)
|
341 |
|
|
XADC_inst (
|
342 |
|
|
// ALARMS: 8-bit (each) output: ALM, OT
|
343 |
|
|
.ALM(), // 8-bit output: Output alarm for temp, Vccint, Vccaux and Vccbram
|
344 |
|
|
.OT(), // 1-bit output: Over-Temperature alarm
|
345 |
|
|
// Dynamic Reconfiguration Port (DRP): 16-bit (each) output: Dynamic Reconfiguration Ports
|
346 |
|
|
.DO(xadc_do), // 16-bit output: DRP output data bus
|
347 |
|
|
.DRDY(xadc_drdy), // 1-bit output: DRP data ready
|
348 |
|
|
// STATUS: 1-bit (each) output: XADC status ports
|
349 |
|
|
.BUSY(), // 1-bit output: ADC busy output
|
350 |
|
|
.CHANNEL(), // 5-bit output: Channel selection outputs
|
351 |
|
|
.EOC(), // 1-bit output: End of Conversion
|
352 |
|
|
.EOS(), // 1-bit output: End of Sequence
|
353 |
|
|
.JTAGBUSY(), // 1-bit output: JTAG DRP transaction in progress output
|
354 |
|
|
.JTAGLOCKED(), // 1-bit output: JTAG requested DRP port lock
|
355 |
|
|
.JTAGMODIFIED(), // 1-bit output: JTAG Write to the DRP has occurred
|
356 |
|
|
.MUXADDR(), // 5-bit output: External MUX channel decode
|
357 |
|
|
// Auxiliary Analog-Input Pairs: 16-bit (each) input: VAUXP[15:0], VAUXN[15:0]
|
358 |
|
|
.VAUXN(16'b0), // 16-bit input: N-side auxiliary analog input
|
359 |
|
|
.VAUXP(16'b0), // 16-bit input: P-side auxiliary analog input
|
360 |
|
|
// CONTROL and CLOCK: 1-bit (each) input: Reset, conversion start and clock inputs
|
361 |
|
|
.CONVST(1'b0), // 1-bit input: Convert start input
|
362 |
|
|
.CONVSTCLK(1'b0), // 1-bit input: Convert start input
|
363 |
|
|
.RESET(1'b0), // 1-bit input: Active-high reset
|
364 |
|
|
// Dedicated Analog Input Pair: 1-bit (each) input: VP/VN
|
365 |
|
|
.VN(1'b0), // 1-bit input: N-side analog input
|
366 |
|
|
.VP(1'b0), // 1-bit input: P-side analog input
|
367 |
|
|
// Dynamic Reconfiguration Port (DRP): 7-bit (each) input: Dynamic Reconfiguration Ports
|
368 |
|
|
.DADDR(7'b0), // 7-bit input: DRP address bus
|
369 |
|
|
.DCLK(xadc_clk), // 1-bit input: DRP clock
|
370 |
|
|
.DEN(xadc_den), // 1-bit input: DRP enable signal
|
371 |
|
|
.DI(16'b0), // 16-bit input: DRP input data bus
|
372 |
|
|
.DWE(1'b0) // 1-bit input: DRP write enable
|
373 |
|
|
);
|
374 |
|
|
|
375 |
|
|
// End of XADC_inst instantiation
|
376 |
|
|
|
377 |
|
|
end
|
378 |
|
|
|
379 |
|
|
endgenerate
|
380 |
|
|
|
381 |
|
|
endmodule
|