代码搜索：4
找到约 10,000 项符合「4」的源代码
代码结果 10,000
www.eeworm.com/read/32279/880976
vhd jp4x4_1.vhd
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity jp4x4_1 is
port(clk:in std_logic;------扫描时钟信号
start:in std_logic;----开始信号，高电平有效
kbcol:in std_logic_ve
www.eeworm.com/read/37180/899967
cpp c10-4-4(vc).cpp
//本程序适用于VC++ 6.0
#include
#include
class String
{public:
String(){p=NULL;}
String(char *str);
friend bool operator>(String &string1,String &string2);
frien
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vopt4vb1b4
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vopt1bn4b4
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asm 4x4 keyboard (2).asm
LINE EQU 30H
ROW EQU 31H
VAL EQU 32H
ORG 00H
START: MOV DPTR,#TABLE ;段码表首地址
MOV P2,#00H ;数码管显示初始化
LSCAN: MOV P3,#0F0H ;列线置高电平,行线置高电平
L1: JNB P3.0,L2 ;逐行扫描
LCALL DELAY
J
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dsn 4x4 keyboard (2).dsn
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asm 4x4 keyboard (1).asm
DBUF EQU 30H
TEMP EQU 40H
ORG 00H
MOV A,#16
MAIN: ACALL DISP
ACALL KEY1
AJMP MAIN
KEY1: MOV P1,#0F0H ;读P1口前先写1
MOV A,P1 ;读取键状态
CJNE A,#0F0H,K11 ;判断是否有键按下
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dsn 4x4 keyboard (1).dsn
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pwi 4x4键盘显示.pwi
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