复位
时序图 梯形图
CRC16 小查表法
#include “stdafx.h” static unsigned short crcTlb[] = { 0x0000, 0xCC01, 0xD801, 0x1400, 0xF001, 0x3C00, 0x2800, 0xE401, 0xA001, 0x6C00, 0x7800, 0xB401, 0x5000, 0x9C01, 0x8801, 0x4400 }; static unsigned short
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Codesys或TwinCAT采用指针获取输入输出M存储区或其它连续存储区变量给数组赋值
VAR a0 AT%M*：REAL:=0.0; a1 AT%M*：REAL:=0.1; a2 AT%M*：REAL:=0.2; a3 AT%M*：REAL:=0.3; a4 AT%M*：REAL:=0.4; i：int：=0； ar:array[0..4] of real; b:bool; pr:pointer to real; r_trig1:R_TRIG; END_VAR r_trig1(clk:=b); if r_trig1.q then b:=0; for i:=0 to 4
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Invoke实现跨线程访问控件
不带参数的跨线程 private void button1_Click(object sender, EventArgs e) { Thread t = new Thread(() => { Random R = new Random(); this.Invoke(new Action(()=> { this.Text =
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使用API函数
Private Declare Function SetWindowText Lib “user32” Alias “SetWindowTextA” (ByVal hwnd As Long, ByVal lpString As String) As Long Private Sub Command1_Click() SetWindowText Form1.hwnd, “hellworld!” End Sub
C# 运行环境问题处理
同事的电脑运行程序，莫名其妙的闪退。 增加以下代码查找原因。 using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Windows.Forms; namespace
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画面之间采用委托传递参数
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace
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事件
GraphicsWindow.MouseUp=OnMouseUp GraphicsWindow.Show() Sub OnMouseUp GraphicsWindow.ShowMessage(“你点击了画面”,”提示”) EndSub
数组
重复相同数据类型的变量 随机存储十个数 For i=1 To 10 randnum[i]= Math.GetRandomNumber(1000) EndFor For j=1 To 10 TextWindow.WriteLine(randnum[j]) EndFor
子程序
子程序减少重复编写相同的代码 子程序实现时间输出 PrintTime() Sub PrintTime TextWindow.WriteLine(Clock.Time) EndSub
循环
循环有两种语句，For和While For实现的循环输出1到10 For i=1 To 10 TextWindow.WriteLine(i) EndFor While实现的循环输出1到10 i=1 While i<11 TextWindow.WriteLine(i) i=i+1 EndWhile