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Line 35... |
---- ----
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---- ----
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---------------------------------------------------------------------
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---------------------------------------------------------------------
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-- CVS Log
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-- CVS Log
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--
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--
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-- $Id: i2c_master_bit_ctrl.vhd,v 1.10 2004-02-27 07:49:43 rherveille Exp $
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-- $Id: i2c_master_bit_ctrl.vhd,v 1.11 2004-05-07 11:04:00 rherveille Exp $
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--
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--
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-- $Date: 2004-02-27 07:49:43 $
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-- $Date: 2004-05-07 11:04:00 $
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-- $Revision: 1.10 $
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-- $Revision: 1.11 $
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-- $Author: rherveille $
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-- $Author: rherveille $
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-- $Locker: $
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-- $Locker: $
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-- $State: Exp $
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-- $State: Exp $
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--
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--
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-- Change History:
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-- Change History:
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-- $Log: not supported by cvs2svn $
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-- $Log: not supported by cvs2svn $
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-- Revision 1.10 2004/02/27 07:49:43 rherveille
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-- Fixed a bug in the arbitration-lost signal generation. VHDL version only.
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--
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-- Revision 1.9 2003/08/12 14:48:37 rherveille
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-- Revision 1.9 2003/08/12 14:48:37 rherveille
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-- Forgot an 'end if' :-/
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-- Forgot an 'end if' :-/
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--
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--
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-- Revision 1.8 2003/08/09 07:01:13 rherveille
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-- Revision 1.8 2003/08/09 07:01:13 rherveille
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-- Fixed a bug in the Arbitration Lost generation caused by delay on the (external) sda line.
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-- Fixed a bug in the Arbitration Lost generation caused by delay on the (external) sda line.
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Line 280... |
end process gen_busy;
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end process gen_busy;
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busy <= ibusy;
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busy <= ibusy;
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-- generate arbitration lost signal
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-- generate arbitration lost signal
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-- aribitration lost when:
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-- 1) master drives SDA high, but the i2c bus is low
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-- 2) stop detected while not requested (detect during 'idle' state)
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gen_al: process(clk, nReset)
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gen_al: process(clk, nReset)
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begin
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begin
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if (nReset = '0') then
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if (nReset = '0') then
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cmd_stop <= '0';
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cmd_stop <= '0';
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ial <= '0';
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ial <= '0';
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Line 301... |
else
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else
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cmd_stop <= '0';
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cmd_stop <= '0';
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end if;
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end if;
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end if;
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end if;
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ial <= (sda_chk and not sSDA and isda_oen) or (sto_condition and not cmd_stop);
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if (c_state = idle) then
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ial <= '0';
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else
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ial <= (sto_condition and not cmd_stop);
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end if;
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ial <= ial or (sda_chk and not sSDA and isda_oen);
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end if;
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end if;
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end if;
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end if;
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end process gen_al;
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end process gen_al;
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al <= ial;
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al <= ial;
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