/*
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/*
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Author: Sebastien Riou (acapola)
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Author: Sebastien Riou (acapola)
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Creation date: 17:16:40 01/09/2011
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Creation date: 17:16:40 01/09/2011
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$LastChangedDate: 2011-02-10 16:40:57 +0100 (Thu, 10 Feb 2011) $
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$LastChangedDate: 2011-02-13 16:20:10 +0100 (Sun, 13 Feb 2011) $
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$LastChangedBy: acapola $
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$LastChangedBy: acapola $
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$LastChangedRevision: 14 $
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$LastChangedRevision: 15 $
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$HeadURL: file:///svn/iso7816_3_master/iso7816_3_master/trunk/test/HexStringConversion.v $
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$HeadURL: file:///svn/iso7816_3_master/iso7816_3_master/trunk/test/HexStringConversion.v $
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This file is under the BSD licence:
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This file is under the BSD licence:
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Copyright (c) 2011, Sebastien Riou
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Copyright (c) 2011, Sebastien Riou
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All rights reserved.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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The names of contributors may not be used to endorse or promote products derived from this software without specific prior written permission.
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The names of contributors may not be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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*/
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function [7:0] hexString2Byte;
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function [7:0] hexString2Byte;
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input [15:0] byteInHexString;
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input [15:0] byteInHexString;
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integer i;
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integer i;
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reg [7:0] hexDigit;
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reg [7:0] hexDigit;
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reg [4:0] nibble;
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reg [4:0] nibble;
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begin
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begin
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for(i=0;i<2;i=i+1) begin
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for(i=0;i<2;i=i+1) begin
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nibble=5'b10000;//invalid
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nibble=5'b10000;//invalid
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hexDigit=byteInHexString[i*8+:8];
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hexDigit=byteInHexString[i*8+:8];
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if(("0"<=hexDigit)&&("9">=hexDigit))
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if(("0"<=hexDigit)&&("9">=hexDigit))
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nibble=hexDigit-"0";
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nibble=hexDigit-"0";
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if(("a"<=hexDigit)&&("f">=hexDigit))
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if(("a"<=hexDigit)&&("f">=hexDigit))
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nibble=10+hexDigit-"a";
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nibble=10+hexDigit-"a";
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if(("A"<=hexDigit)&&("F">=hexDigit))
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if(("A"<=hexDigit)&&("F">=hexDigit))
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nibble=10+hexDigit-"A";
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nibble=10+hexDigit-"A";
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if(nibble>15) begin
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if(nibble>15) begin
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$display("Invalid input for hex conversion: '%s', hexDigit='%s' (%x), nibble=%d",byteInHexString,hexDigit,hexDigit,nibble);
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$display("Invalid input for hex conversion: '%s', hexDigit='%s' (%x), nibble=%d",byteInHexString,hexDigit,hexDigit,nibble);
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$finish;
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$finish;
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end
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end
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hexString2Byte[i*4+:4]=nibble;
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hexString2Byte[i*4+:4]=nibble;
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end
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end
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end
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end
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endfunction
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endfunction
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task getNextHexByte;
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task getNextHexByte;
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input [8*3*257:0] bytesString;
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input [8*3*(256+5+1+2):0] bytesString;
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input integer indexIn;
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input integer indexIn;
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output reg [7:0] byteOut;
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output reg [7:0] byteOut;
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output integer indexOut;
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output integer indexOut;
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reg [15:0] byteInHex;
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reg [15:0] byteInHex;
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begin
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begin
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byteInHex=" ";
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byteInHex=" ";
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//$display("bytesString: %x",bytesString);
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//$display("bytesString: %x",bytesString);
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while((indexIn>=16)&((8'h0==byteInHex[15:8])|(8'h20==byteInHex[15:8]))) begin
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while((indexIn>=16)&((8'h0==byteInHex[15:8])|(8'h20==byteInHex[15:8]))) begin
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byteInHex=bytesString[(indexIn-1)-:16];
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byteInHex=bytesString[(indexIn-1)-:16];
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indexIn=indexIn-8;
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indexIn=indexIn-8;
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//$display("indexIn: %d",indexIn);
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//$display("indexIn: %d",indexIn);
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end
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end
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indexOut=indexIn-8;
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indexOut=indexIn-8;
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//$display("indexOut: %d, byteInHex: '%s' (%x)",indexOut, byteInHex, byteInHex);
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//$display("indexOut: %d, byteInHex: '%s' (%x)",indexOut, byteInHex, byteInHex);
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if((16'h0!=byteInHex) & (indexOut>=0) & (8'h20!=byteInHex[7:0])) begin
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if((16'h0!=byteInHex) & (indexOut>=0) & (8'h20!=byteInHex[7:0])) begin
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byteOut=hexString2Byte(byteInHex);
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byteOut=hexString2Byte(byteInHex);
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//$display("byteOut: %x",byteOut);
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//$display("byteOut: %x",byteOut);
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end else begin
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end else begin
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indexOut=-1;
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indexOut=-1;
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end
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end
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end
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endtask
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task hexStringToBytes;
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input [8*3*(256+5+1+2):0] bytesString;
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output reg [8*(256+5+1+2):0] bytesOut;
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output integer nBytes;
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integer i;
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reg [7:0] newByte;
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begin
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nBytes=0;
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i=8*3*(256+5+1+2);
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//$display("bytesString: %x",bytesString);
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getNextHexByte(bytesString, i, newByte, i);
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while(i!=-1) begin
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//$display("i: %d, nBytes: %d, newByte: %x",i, nBytes, newByte);
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bytesOut[nBytes*8+:8]=newByte;
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nBytes=nBytes+1;
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getNextHexByte(bytesString, i, newByte, i);
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end
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end
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end
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endtask
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endtask
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