- fixed rounding issue in usec prescaler

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git-svn-id: http://moon:8086/svn/vhdl/trunk@743 cc03376c-175c-47c8-b038-4cd826a8556b

lib/ps2_port/src/ps2_core.vhd

@@ -69,7 +69,7 @@ type line_state_tx_t is (tx_idle_st, tx_clock_assert_st, tx_start_latency_st,
 								 tx_ack_trans_st, tx_ack_sample_st, tx_valid_st);
 
 -- Constant
-constant prescaler_us          : integer := integer(f_sys_clk + 0.5);
+constant prescaler_us          : integer := integer(f_sys_clk);
 constant timeout_us            : integer := 15000;
 constant time_clock_assert     : integer := 120;
 constant time_clock_abort      : integer := 500;