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- to_cycles() now correctly rounded

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git-svn-id: http://moon:8086/svn/vhdl/trunk@735 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2010-02-09 08:42:21 +00:00
parent 0c50e933f8
commit c7fa54ce6b
2 changed files with 4 additions and 2 deletions
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lib/SDRAM/ddr_sdr_v1_5/src/sdram_types.vhd
+2 -1
View File
@@ -24,6 +24,7 @@
library IEEE; library IEEE;
USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.NUMERIC_STD.ALL; USE IEEE.NUMERIC_STD.ALL;
USE IEEE.MATH_REAL.ALL;
use work.sdram_config.all; use work.sdram_config.all;
@@ -122,7 +123,7 @@ package body sdram_types is
function to_cycles(T_ns : real; f_Mhz : real) return natural is function to_cycles(T_ns : real; f_Mhz : real) return natural is
begin begin
return natural(0.5 + 1.0E-3*T_ns*f_Mhz); return natural(ceil(1.0E-3*T_ns*f_Mhz));
end to_cycles; end to_cycles;
lib/misc/async_types.vhd
+2 -1
View File
@@ -24,6 +24,7 @@
library IEEE; library IEEE;
USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.NUMERIC_STD.ALL; USE IEEE.NUMERIC_STD.ALL;
USE IEEE.MATH_REAL.ALL;
package async_types is package async_types is
@@ -53,7 +54,7 @@ package body async_types is
function to_cycles(T_ns : real; f_Mhz : real) return natural is function to_cycles(T_ns : real; f_Mhz : real) return natural is
begin begin
return natural(0.5 + 1.0E-3*T_ns*f_Mhz); return natural(ceil(1.0E-3*T_ns*f_Mhz));
end to_cycles; end to_cycles;
end async_types; end async_types;