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【洛谷P1126】机器人搬重物

题目大意:给定一个 N 行,M 列的地图,一个直径为 1.6 的圆形机器人需要从起点走到终点,每秒钟可以实现:向左转,向右转,向前 1-3 步。求从起点到终点最少要多长时间。 题解:相比于普通的...

2019/01/09 17:29
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learning uboot support web http function in qca4531 cpu

reference :https://forum.openwrt.org/viewtopic.php?id=43237 reference :http://blog.chinaunix.net/uid-22547469-id-5048943.html cp httpd cus531-16m/ -a cp net/httpd.c cus531-16m/ ...

2019/01/09 17:19
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Wifi Troughput Test using iperf

learning wifi throughput test using iperf 【Purpose】 Learning how to do wifi throughput test using iperf We can do base on tcp/udp protocol 【Eevironment】 Ubuntu 16.04 or X86 ...

2019/01/09 17:42
3
learning uboot how to set ddr parameter in qca4531 cpu

DDR工作频率 在600MHZ. include/configs/board953x.h #define CFG_PLL_FREQ CFG_PLL_650_600_200 #define CFG_DDR_REFRESH_VAL 0x4138 (default 12c) 0x0100 0001 0011 1000 ./board/atheros...

cas
2019/01/09 16:48
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learning uboot how to enable watchdog in qca4531 cpu

find cpu datasheet , watchdog relate registers: 0x18060008 watchdong timer control 0x1806000c watchdog timer we can read and write watchdog register under uboot console: #mw 0x1...

2019/01/09 16:59
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合法的MAC地址

以太网的地址为48位,由ieee统一分配给网卡制造商,每个网卡的地址都必须是全球唯一的。共6个字节的长度 字节 5 4 3 2 1 0 位 47。。40 39。。32 31。。24 23。。16 15。。8 7。。0 例子 08...

2019/01/09 16:10
4
Linux WiFi Deauthenticated Reason Codes

Code Reason Explanation 0 Reserved Normal working operation 1 Unspecific Reason We don’t know what’s wrong 2 Previous authentication no longer valid Client has associated but...

2019/01/09 15:42
155
Openwrt WiFi Configure(1)

1 Scope of Document This document describes how to custom wifi option 2 Requiremen 2.1 Function Requirement Hidden wifi ssid, custom wifi ssid, custom wifi password… 2.2 Perfor...

2019/01/09 15:23
71
Openwrt VLAN Configure(2)

1 Scope of Document This document describes vlan design on nodewrt2p 2 Requiremen 2.1 Function Requirement Port0 be used for wan port, PORT1 PORT2 PORT3 PORT4 be used for lan po...

2019/01/09 15:25
76
Openwrt Udev Configure(3)

1 Scope of Document This document describes how to write udev script, when enum usb device maybe produces several interfaces(/dev/ttyUSB*), if we want to compatible serveral usb...

2019/01/09 15:27
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Openwrt Support MINI-PCIE EC20 (6)

1 Scope of Document This document describes MINI PCIE usb hardware design, for EC20 4G module 2 Requiremen 2.1 Function Requirement Support ec20 ppp diag under openwrt 2.2 Perfo...

2019/01/09 15:32
109
Openwrt Export Gpio Configure (7)

1 Scope of Document This document describes how to export gpio interface under gpio-export driver 2 Requiremen 2.1 Function Requirement We can pull up and pull down gpio under /...

2019/01/09 15:35
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Openwrt TF Card Auto Mount&Check (4)

1 Scope of Document This document describes tf card bootup auto do file system check when mount tf card 2 Requiremen 2.1 Function Requirement Auto do fsch and mount tf card. 2.2...

2019/01/09 15:29
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Openwrt Support RESET Button (5)

1 Scope of Document This document describes how to support reset button under openwrt system 2 Requiremen 2.1 Function Requirement NA 2.2 Performance Requirement NA 3 Hardware O...

构造方法的格式

Student.java /* 构造方法作用概述:给对象的数据进行初始化 * * 1.构造方法的方法名和类名相同 * 2.构造方法不能写void ,没有返回值类型 * 3.没有具体的返回值 * ...

2019/01/09 15:40
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类名作为返回值类型

Student.java public class Student { public void study() { System.out.println("好好学习,天天向上"); } } Teacher.java public class Teacher { //St...

2019/01/09 16:41
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类名作为形式参数传递

Student.java public class Student { public void study() { System.out.println("好好学习,天天向上"); } } Teacher.java public class Teacher { publ...

2019/01/09 16:36
5
判断一颗二叉树是否为二叉搜索树

首先定义一个二叉树的结构体 struct BinaryTree { int value; BinaryTree* lson; BinaryTree* rson; }; 第一种方法 int maxOf(BinaryTree* root) { if (root->rson) {...

2019/01/09 15:01
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redis五大数据类型以及常用操作命令

Redis的五大数据类型 String(字符串) string是redis最基本的类型,你可以理解成与Memcached一模一样的类型,一个key对应一个value。string类型是二进制安全的。意思是redis的string可以包含任何...

2019/01/09 17:24
16
MongoDB中导入数据命令的使用(mongoimport)

MongoDB中导入数据命令的使用(mongoimport) 制作人:全心全意 语法:   mongoimport <options> <file> 介绍:   该命令可以将CSV,TSV或JSON文件数据导入MongoDB, 如果没有提供文件,则...

2019/01/09 15:53
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