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- bugfix: LSB_FIRST was not working

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git-svn-id: http://moon:8086/svn/vhdl/trunk@816 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2010-03-25 09:31:43 +00:00
parent 869a0bd0ef
commit 2978ddd09a
1 changed files with 11 additions and 3 deletions
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lib/emac/src/sipo.vhd
+11 -3
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@@ -41,7 +41,7 @@ ARCHITECTURE behavior OF sipo IS
-------------------------------------------------------------------------- --------------------------------------------------------------------------
begin begin
pre_fin <= shift_cnt_pipe(shift_cnt_pipe'left); pre_fin <= shift_cnt_pipe(shift_cnt_pipe'left) when msb_first else shift_cnt_pipe(0);
dout_en <= out_en; dout_en <= out_en;
dout_vld <= out_vld; dout_vld <= out_vld;
@@ -86,9 +86,17 @@ process(clk)
begin begin
if rising_edge(clk) then if rising_edge(clk) then
if rst = '1' or pre_fin = '1' then if rst = '1' or pre_fin = '1' then
shift_cnt_pipe <= (shift_cnt_pipe'left downto 1 => '0') & din_vld; if (msb_first) then
shift_cnt_pipe <= (shift_cnt_pipe'left downto 1 => '0') & din_vld;
else
shift_cnt_pipe <= din_vld & (shift_cnt_pipe'left downto 1 => '0');
end if;
elsif din_vld = '1' or abort = '1' then elsif din_vld = '1' or abort = '1' then
shift_cnt_pipe <= shift_cnt_pipe(shift_cnt_pipe'left-1 downto 0) & din_vld; if (msb_first) then
shift_cnt_pipe <= shift_cnt_pipe(shift_cnt_pipe'left-1 downto 0) & din_vld;
else
shift_cnt_pipe <= din_vld & shift_cnt_pipe(shift_cnt_pipe'left downto 1);
end if;
end if; end if;
end if; end if;
end process; end process;