用CPLD做了HC595的芯片，求优化尺寸

2万 · 2012-2-21 23:22

用Max3032做了个HC595的串转并来扩充单片机的IO口，只做了8位，用掉24个宏单元，请教如何写才能减少宏单元的使用，这芯片总共就32个宏单位，我还想做成2个HC595级联的方式，估计是不够用了。

源程序VHDL语言如下：

-- Library Clause(s) (optional)
-- Use Clause(s) (optional)
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity MC_PLD is
port
(
  -- Input ports
-- <name> : in  <type>;
-- <name> : in  <type> := <default_value>;
  PL2303_DTR : in std_logic;
  PL2303_RTS : in std_logic;
  -- Inout ports
-- <name> : inout <type>;
  -- Output ports
-- <name> : out <type>;
-- <name> : out <type> := <default_value>
  MCU_RES : in std_logic;
  MCU_P014 : in std_logic;
  LED_O1  : out std_logic;
  LED_O2  : out std_logic;
  LED_O3  : out std_logic;
  LED_O4  : out std_logic;
  LED_O5  : out std_logic;
  LED_O6  : out std_logic;
  LED_O7  : out std_logic;
  LED_O8  : out std_logic
);
end MC_PLD;
architecture MC_CTRL_ARCH of MC_PLD is
-- Declarations (optional)
signal HC595_DO1,HC595_DO2,HC595_DO3,HC595_DO4,HC595_DO5 ,HC595_DO6,HC595_DO7,HC595_DO8 :std_logic;
signal HC595_Shift_D0,HC595_Shift_D1,HC595_Shift_D2,HC595_Shift_D3,HC595_Shift_D4,HC595_Shift_D5,HC595_Shift_D6,HC595_Shift_D7 :std_logic;
begin
-- LED_O1 <= PL2303_DTR;
-- LED_O2 <= PL2303_RTS;
-- LED_O1 <= MCU_RES;
-- LED_O2 <= MCU_P014;
-- LED_O3 <= PL2303_DTR;
-- LED_O4 <= PL2303_RTS;

-- LED_O3 <= '1';
-- LED_O4 <= '1';
-- LED_O5 <= '1';
-- LED_O6 <= '1';
-- LED_O7 <= '1';
-- LED_O8 <= '1';
-- LED_O5 <= NOT(MCU_RES);
-- LED_O6 <= not(MCU_P014);
--  LED_O7 <= not(PL2303_DTR);
-- LED_O8 <= not(PL2303_RTS);
process(PL2303_DTR)
  begin

  if(PL2303_DTR 'event and pl2303_DTR = '1')then
--  if(MCU_RES 'event and MCU_RES = '1')then
HC595_Shift_D0 <= PL2303_RTS;
HC595_Shift_D1 <= HC595_Shift_D0;
HC595_Shift_D2 <= HC595_Shift_D1;
HC595_Shift_D3 <= HC595_Shift_D2;
HC595_Shift_D4 <= HC595_Shift_D3;
HC595_Shift_D5 <= HC595_Shift_D4;
HC595_Shift_D6 <= HC595_Shift_D5;
HC595_Shift_D7 <= HC595_Shift_D6;

  end if;

end process;

process(MCU_RES)
  begin
  if(MCU_RES 'event and MCU_RES = '1')then
HC595_DO1 <= HC595_Shift_D0;
HC595_DO2 <= HC595_Shift_D1;
HC595_DO3 <= HC595_Shift_D2;
HC595_DO4 <= HC595_Shift_D3;
HC595_DO5 <= HC595_Shift_D4;
HC595_DO6 <= HC595_Shift_D5;
HC595_DO7 <= HC595_Shift_D6;
HC595_DO8 <= HC595_Shift_D7;

LED_O1 <= HC595_DO1;
LED_O2 <= HC595_DO2;
LED_O3 <= HC595_DO3;
LED_O4 <= HC595_DO4;
LED_O5 <= HC595_DO5;
LED_O6 <= HC595_DO6;
LED_O7 <= HC595_DO7;
LED_O8 <= HC595_DO8;

  end if;
end process;
-- Process Statement (optional)
-- Concurrent Procedure Call (optional)
-- Concurrent Signal Assignment (optional)
-- Conditional Signal Assignment (optional)
-- Selected Signal Assignment (optional)
-- Component Instantiation Statement (optional)
-- Generate Statement (optional)
end MC_CTRL_ARCH;

2万 · 2012-2-21 23:24

如果不做二级锁存，类似HC164的用法，能省不少宏单元，但不可靠。HC164用来驱动发光管问题不大，驱动其它器件就不是太理想了。

1万 · 2012-2-23 10:16

不级联，直接16位宽咋样？

2万 · 2012-2-23 22:04

不用中间信号量，移位的信号值直接送端口，HC595用掉16个宏单元，外加一个HC164，总共实现这两个芯片，用掉了26个宏单元。
结构体部分的代码如下所示

architecture MC_CTRL_ARCH of MC_PLD is

-- Declarations (optional)
signal HC164_DO1,HC164_DO2,HC164_DO3,HC164_DO4,HC164_DO5 ,HC164_DO6,HC164_DO7,HC164_DO8 :std_logic;
signal HC595_Shift_D0,HC595_Shift_D1,HC595_Shift_D2,HC595_Shift_D3,HC595_Shift_D4,HC595_Shift_D5,HC595_Shift_D6,HC595_Shift_D7 :std_logic;
begin

-- LED_O1 <= PL2303_DTR;
-- LED_O2 <= PL2303_RTS;
-- LED_O1 <= MCU_RES;
-- LED_O2 <= MCU_P014;
-- LED_O3 <= PL2303_DTR;
-- LED_O4 <= PL2303_RTS;

-- LED_O3 <= '1';
-- LED_O4 <= '1';
-- LED_O5 <= '1';
-- LED_O6 <= '1';
-- LED_O7 <= '1';
-- LED_O8 <= '1';
-- LED_O5 <= NOT(MCU_RES);
-- LED_O6 <= not(MCU_P014);
-- LED_O7 <= not(PL2303_DTR);
-- LED_O8 <= not(PL2303_RTS);

MCU_RES <= PL2303_DTR;
MCU_P014 <= PL2303_RTS;

process(MCU_SCK)
begin

if(MCU_SCK 'event and MCU_SCK = '1')then
-- if(MCU_RES 'event and MCU_RES = '1')then
HC595_Shift_D0 <= MCU_MISO;
HC595_Shift_D1 <= HC595_Shift_D0;
HC595_Shift_D2 <= HC595_Shift_D1;
HC595_Shift_D3 <= HC595_Shift_D2;
HC595_Shift_D4 <= HC595_Shift_D3;
HC595_Shift_D5 <= HC595_Shift_D4;
HC595_Shift_D6 <= HC595_Shift_D5;
HC595_Shift_D7 <= HC595_Shift_D6;

end if;

end process;

process(MCU_MOSI)
begin
if(MCU_MOSI 'event and MCU_MOSI = '1') then
-- HC164_DO1 <= MCU_MISO;
-- HC164_DO2 <= HC164_DO1;
-- HC164_DO3 <= HC164_DO2;
-- HC164_DO4 <= HC164_DO3;
-- HC164_DO5 <= HC164_DO4;
-- HC164_DO6 <= HC164_DO5;
-- HC164_DO7 <= HC164_DO6;
-- HC164_DO8 <= HC164_DO7;

-- LED_O1 <= HC164_DO1;
-- LED_O2 <= HC164_DO2;
-- LED_O3 <= HC164_DO3;
-- LED_O4 <= HC164_DO4;
-- LED_O5 <= HC164_DO5;
-- LED_O6 <= HC164_DO6;
-- LED_O7 <= HC164_DO7;
-- LED_O8 <= HC164_DO8;

LED_O1 <= MCU_MISO;
LED_O2 <= LED_O1;
LED_O3 <= LED_O2;
LED_O4 <= LED_O3;
LED_O5 <= LED_O4;
LED_O6 <= LED_O5;
LED_O7 <= LED_O6;
LED_O8 <= LED_O7;

end if;
end process;
process(MCU_SEL)
begin
if(MCU_SEL 'event and MCU_SEL = '1')then

-- LED_O1 <= HC595_Shift_D0;
-- LED_O2 <= HC595_Shift_D1;
-- LED_O3 <= HC595_Shift_D2;
-- LED_O4 <= HC595_Shift_D3;
-- LED_O5 <= HC595_Shift_D4;
-- LED_O6 <= HC595_Shift_D5;
-- LED_O7 <= HC595_Shift_D6;
-- LED_O8 <= HC595_Shift_D7;
DC_PTB0 <= HC595_Shift_D0;
DC_PTB1 <= HC595_Shift_D1;
DC_PTB2 <= HC595_Shift_D2;
DC_PTB3 <= HC595_Shift_D3;
DC_PTB4 <= HC595_Shift_D4;
DC_PTB5 <= HC595_Shift_D5;
DC_PTB6 <= HC595_Shift_D6;
DC_PTB7 <= HC595_Shift_D7;

-- LED_O1 <= HC595_DO1;
-- LED_O2 <= HC595_DO2;
-- LED_O3 <= HC595_DO3;
-- LED_O4 <= HC595_DO4;
-- LED_O5 <= HC595_DO5;
-- LED_O6 <= HC595_DO6;
-- LED_O7 <= HC595_DO7;
-- LED_O8 <= HC595_DO8;

end if;
end process;
-- Process Statement (optional)

-- Concurrent Procedure Call (optional)

-- Concurrent Signal Assignment (optional)

-- Conditional Signal Assignment (optional)

-- Selected Signal Assignment (optional)

-- Component Instantiation Statement (optional)

-- Generate Statement (optional)

end MC_CTRL_ARCH;

用CPLD做了HC595的芯片，求优化尺寸

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