pic | 易学教程

运动框架中级

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多个物体同时运动 •例子：多个Div，鼠标移入变宽 –单定时器，存在问题 –每个Div一个定时器 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style> div {width:100px; height:50px; background:red; margin-top:50px;} </style> <script> window.onload=function() { var aDiv=document.getElementsByTagName('div'); var i=0; for(i=0; i<aDiv.length; i++) { aDiv[i].timer=null; aDiv[i].onmouseover=function() { startMove(this, 3000); } aDiv

Is there string in C?

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问题 Is there string in CCS? Can I use: string myString = "My String"; // Error or NOT ? 回答1: The standard string.h header file does not define a data type called string , it provides functions for manipulating C-style strings, which are null-terminated character arrays. For example, you can do something like: #include <stdio.h> #include <string.h> int main(void) { char *myName = "paxdiablo"; printf("Length of '%s' is %zu\n", myName, strlen(myName)); return 0; } Note the string in that code, it's

Is there string in C?

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乱七八糟网址大集合

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http://ghlp.igogo8.com/ghlp_more.html 闪字 http://pic.sdodo.com/ 图片生成 http://mm.tpp8.com/ascii/ 字副画 http://www.iephotoshop.com/ 图片编辑 http://vip2.6to23.com/may5th/zh.html 繁体字 http://www.eoool.com/Default.aspx?TypeID=0 动画制作 http://id.igogo8.com/ 身份证制作 http://www.eoool.com/ImageDIY/DIYChooseImg.aspx?ImgSize=96x96x1 头像生成 http://www.eoool.com/Sevice.aspx?TypeID=2 聊天图标 http://tools.fodey.com/generators/animated/ninjatext.asp 日本武士刀劈出你需要的字 http://www.nhacks.com/email/ 支持多种域名的Email图标的生成 http://pentacom.jp/soft/ex/font/edit.html itfontMaker——字体制作 http://www.onlinewahn.de/generator/m-maker.htm 钱币生成器 http:/

flex4 List 的简单使用

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AbacusListDemo.xml 1 <? xml version = " 1.0 " encoding = " utf-8 " ?> 2 < s:Application xmlns:fx = " http://ns.adobe.com/mxml/2009 " 3 xmlns:s = " library://ns.adobe.com/flex/spark " 4 xmlns:mx = " library://ns.adobe.com/flex/mx " minWidth = " 955 " minHeight = " 600 " xmlns:views = " com.shenmo.views.* " > 5 < fx:Declarations > 6  7 </ fx:Declarations > 8 < fx:Script > 9 <! [CDATA[ 10 import com.shenmo.utils.BindablePicture; 11 import mx.collections.ArrayCollection; 12 [Bindable] 13 private var abacusArrayCollection

Link step can't find symbols (XC8 compiler)

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问题 I'm trying to compile and link a C program using the XC8 compiler. I changed from the C18 compiler and made some minor compatibility changes to the code. With C18, the code compiled and linked just fine. With XC8, compiling goes fine, but the link step fails with this error: Error [500] ; 0. undefined symbols: _putch(server.obj) _ENC_Init(server.obj) _ENC_WriteRegister(server.obj) _ENC_ReadRegister(server.obj) As the compiling succeeds, I guess there are prototypes found, ergo the .h files

Random Seed in PIC18F

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问题 I'm going to run modified DES code(C language) on the PIC18F2550 microcontroller. For this I am using mplabx IDE v 2 and Mplab xc8 v 1.30. To modify the code, I need a random number so that each run will produce different numbers. I want to use the rand function but I need a good seed for Srand function! Good seed can be time, but since there is no such thing as a micro or I do not know!! 回答1: You can store an integer value in EEPROM. When the device boots, you use it as a seed and then

《30天自制操作系统》笔记(10)——定时器

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《30天自制操作系统》笔记(10)——定时器进度回顾上一篇和上上一篇解决了绘制窗口和窗口刷新的问题。关于窗口的东西就此告一段落。本篇介绍一个相对独立且十分重要的操作系统部件—— 定时器的使用方法。定时器是一个硬件可编程的间隔型定时器(Programmable Interval Timer)简称定时器(PIT) ，是集成到电脑上的一个硬件部件。之前讲过的用于实现中断机制的 PIC 也是个硬件部件。有了PIT，我们才能在计算机中计时。初始化定时器前面，CPU、PIC都需要设置好才能用， PIT也需要设置。PIT类似C#Winform里的Timer控件，能设置的只有激发Tick事件的时间间隔(Interval) 这个属性。PIT里的Tick事件，对应的是PIC里的 0号中断。也就是说，PIT会根据你设定的Interval，每隔Interval时间就发送一个0号中断。这里又印证了 "事件小名中断" 的说法。 1 #define PIT_CTRL 0x0043 2 #define PIT_CNT0 0x0040 3 void init_pit(void) 4 { 5 io_out8(PIT_CTRL, 0x34);/*中断周期(Interval)即将变更*/ 6 io_out8(PIT_CNT0, 0x9c);/*中断周期的低8位*/ 7 io_out8(PIT

Convert Hex to Decimal when no datatype can hold the full number

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问题 I am working with a PIC microprocessor, in C. It's a 16F, so it can't hold integers larger than 32bits (unsigned int32 is the largest datasize available) From a reader, I receive a 5 byte ID code. To transmit it, I have to encoded to BCD, digit by digit. I can't sprint it to a string, as it is larger that the data size, and can't process it. I can't divide it because no operation is defined for it. I can't figure out any solution possible, does anyone have dealt with this before? EDIT: I

PIC Backend: 16-bit registers / return type

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问题 I started writing an LLVM Backend for 16-bit PIC microcontrollers (PIC24, dsPIC30/33). After copying and renaming stuff from Lanai, removing much, adding some and making the backend known to clang I can translate short foo(void) { return 6*7; } to mov #0x2A, W0 ret which is precisely what I wanted. The DataLayout is set to "e-m:e-p:16:16-i16:16-a:0:16-n16-S16" and the registers are defined as def GPR : RegisterClass<"PIC", [i16], 16, (sequence "W%u", 0, 15)>; and added as addRegisterClass(MVT