p_alarm.vhd

本文件是针对了解闹钟控制系统而写的一个VHDL源代码。

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
PACKAGE P_ALARM IS
   SUBTYPE T_DIGITAL IS INTEGER RANGE 0 TO 9;
   SUBTYPE T_SHORT IS INTEGER RANGE 0 TO 65535;
   TYPE T_CLOCK_TIME IS ARRAY(3 DOWNTO 0) OF T_DIGITAL;
   TYPE T_DISPLAY IS ARRAY(3 DOWNTO 0) OF STD_LOGIC_VECTOR(6 DOWNTO 0);
   TYPE SEG7 IS ARRAY(0 TO 9) OF STD_LOGIC_VECTOR(6 DOWNTO 0);
   CONSTANT SEVEN_SEG:SEG7:=(
                             "0111111",
                             "0000110",
                             "1011011",
                             "1001111",
                             "1100110",
                             "1101101",
                             "1111101",
                             "0000111",
                             "1111111",
                             "1101111"
                            );
   TYPE KEYPAD9 IS ARRAY (0 TO 9) OF STD_LOGIC_VECTOR(9 DOWNTO 0);
   CONSTANT KEYNUMBER:KEYPAD9:=(
                             "0000000001",
                             "0000000010",
                             "0000000100",
                             "0000001000",
                             "0000010000",
                             "0000100000",
                             "0001000000",
                             "0010000000",
                             "0100000000",
                             "1000000000"
                            );
  END PACKAGE P_ALARM;