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/*
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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: 2011-02-13 16:20:10 +0100 (Sun, 13 Feb 2011) $
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$LastChangedDate: 2011-02-18 15:23:07 +0100 (Fri, 18 Feb 2011) $
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$LastChangedBy: acapola $
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$LastChangedBy: acapola $
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$LastChangedRevision: 15 $
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$LastChangedRevision: 17 $
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$HeadURL: file:///svn/iso7816_3_master/iso7816_3_master/trunk/sources/Iso7816_3_Master.v $
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$HeadURL: file:///svn/iso7816_3_master/iso7816_3_master/trunk/sources/Iso7816_3_Master.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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assign tsReceived = ~waitTs;
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assign tsReceived = ~waitTs;
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reg [7:0] ts;
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reg [7:0] ts;
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assign atrIsEarly = ~waitTs & (resetCnt<(16'h100+16'd400));
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assign atrIsEarly = ~waitTs & (resetCnt<(16'h100+16'd400));
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assign atrIsLate = resetCnt>(16'h100+16'd40000);
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assign atrIsLate = resetCnt>(16'h100+16'd40000);
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assign useIndirectConvention = ~waitTs & (ts==8'h3F);
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assign useIndirectConvention = ~waitTs & (ts==8'h3F);
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assign tsError = ~waitTs & (ts!=8'h3B) & ~useIndirectConvention;
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assign tsError = ~waitTs & (ts!=8'h3B) & (ts!=8'h3F);
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always @(posedge comClk, negedge nReset) begin
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always @(posedge comClk, negedge nReset) begin
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if(~nReset) begin
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if(~nReset) begin
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isoClkEn <= 1'b0;
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isoClkEn <= 1'b0;
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resetCnt<=16'b0;
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resetCnt<=16'b0;
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waitTs<=1'b1;
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waitTs<=1'b1;
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if(waitTs) begin
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if(waitTs) begin
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if(statusOut[0]) begin
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if(statusOut[0]) begin
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waitTs<=1'b0;
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waitTs<=1'b0;
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case(dataOut)
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case(dataOut)
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8'h3B: ts<=dataOut;
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8'h3B: ts<=dataOut;
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8'h03: ts<=8'h3F;
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8'h03: ts<=8'h3F;//03 is 3F written LSB first and complemented
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default: ts<=dataOut;
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default: ts<=dataOut;
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endcase
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endcase
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end
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end
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resetCnt<=resetCnt+1;
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resetCnt<=resetCnt+1;
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end
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end
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