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[JUART]

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- better BAUD_DIV

git-svn-id: http://moon:8086/svn/vhdl/trunk@1345 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2016-12-18 10:37:05 +00:00
parent 0300be76ce
commit b1156e2163
2 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/uart/sim/tb_juart_tx_rx.wdo
+1 -1
View File
@@ -11,7 +11,7 @@ add wave -noupdate -format Logic /tb_juart_tx_rx/serial_in
add wave -noupdate -format Logic /tb_juart_tx_rx/data_strobe add wave -noupdate -format Logic /tb_juart_tx_rx/data_strobe
add wave -noupdate -format Literal -radix hexadecimal /tb_juart_tx_rx/data_out add wave -noupdate -format Literal -radix hexadecimal /tb_juart_tx_rx/data_out
add wave -noupdate -format Literal -radix hexadecimal /tb_juart_tx_rx/data_rx add wave -noupdate -format Literal -radix hexadecimal /tb_juart_tx_rx/data_rx
add wave -noupdate -format Literal /tb_juart_tx_rx/data_tx add wave -noupdate -format Literal -radix hexadecimal /tb_juart_tx_rx/data_tx
TreeUpdate [SetDefaultTree] TreeUpdate [SetDefaultTree]
WaveRestoreCursors {{Cursor 1} {0 ps} 0} WaveRestoreCursors {{Cursor 1} {0 ps} 0}
configure wave -namecolwidth 150 configure wave -namecolwidth 150
lib/uart/tb_juart_tx_rx.vhd
+3 -2
View File
@@ -32,6 +32,7 @@ architecture behave of tb_juart_tx_rx is
-- Number of user data words for simulation -- Number of user data words for simulation
constant CLK_PERIOD : time := 10 ns; constant CLK_PERIOD : time := 10 ns;
constant BAUD_DIV : natural := 2;
-- Common -- Common
signal rst : std_logic := '1'; signal rst : std_logic := '1';
@@ -51,7 +52,7 @@ architecture behave of tb_juart_tx_rx is
-- Others -- Others
signal baud_count : unsigned(15 downto 0); signal baud_count : unsigned(15 downto 0);
signal baudrate : unsigned(15 downto 0) := X"0001"; signal baud_reg : unsigned(15 downto 0) := to_unsigned(BAUD_DIV-1, baud_count'length);
signal data_rx : unsigned(7 downto 0); signal data_rx : unsigned(7 downto 0);
signal data_tx : unsigned(7 downto 0); signal data_tx : unsigned(7 downto 0);
@@ -108,7 +109,7 @@ begin
en_16_x_baud <= '0'; en_16_x_baud <= '0';
if rst = '1' then if rst = '1' then
baud_count <= (others => '0'); baud_count <= (others => '0');
elsif baud_count = baudrate then elsif baud_count = baud_reg then
baud_count <= (others => '0'); baud_count <= (others => '0');
en_16_x_baud <= '1'; en_16_x_baud <= '1';
else else