随笔列表第8页 - IAmAProgrammer

2015年8月10日

摘要：算法思想简单描述：在插入第i个元素时，对前面的0～i-1元素进行折半，先跟他们中间的那个元素比，如果小，则对前半再进行折半，否则对后半进行折半，直到left>right，然后再把第i个元素前1位与目标位置之间的所有元素后移，再把第i个元素放在目标位置上。二分法排序最重要的一个步骤就是查... 阅读全文

posted @ 2015-08-10 23:00 IAmAProgrammer 阅读(1522) 评论(0) 推荐(0) 编辑

STM32 Controller area network (bxCAN) Identifier filtering

摘要： Identifier filteringIn the CAN protocol the identifier of a message is not associated with the address of a nodebut related to the content of the mess... 阅读全文

posted @ 2015-08-10 02:37 IAmAProgrammer 阅读(5975) 评论(0) 推荐(0) 编辑

Canbus ID filter and mask

摘要： Canbus ID filter and maskCANBUS is a two-wire, half-duplex, bus based LANsystem that is ‘collision free’. Data is BROADCAST onto the bus -THERE IS NO ... 阅读全文

posted @ 2015-08-10 01:39 IAmAProgrammer 阅读(18605) 评论(0) 推荐(0) 编辑

Calculate CAN bit timing parameters

摘要： Calculate CAN bit timing parametersTSYNC_SEG=== 1TSEG1 = Prop_Seg + Phase_Seg1TSEG2 = Phase_Seg2TBit = TSYNC_SEG + TSEG1 + TSEG2( TBit - TSEG2 ) / TBi... 阅读全文

posted @ 2015-08-10 00:22 IAmAProgrammer 阅读(12540) 评论(0) 推荐(0) 编辑

2015年8月9日

A CANBus Tiny Network without Transceiver ICs : STM32F4 Discovery

摘要： Sometimes you have a CAN equipped processor on a low cost board but it has no CAN transceiver chips.Here is a method that can be used to create a smal... 阅读全文

posted @ 2015-08-09 12:46 IAmAProgrammer 阅读(1568) 评论(0) 推荐(0) 编辑

ChibiOS/RT 2.6.9 CAN Low Level Driver for STM32

posted @ 2015-08-09 12:01 IAmAProgrammer 阅读(1371) 评论(0) 推荐(0) 编辑

ChibiOS/RT 2.6.9 CAN Driver

摘要： Detailed DescriptionGeneric CAN Driver.This module implements a generic CAN (Controller Area Network) driver allowing the exchange of information at f... 阅读全文

posted @ 2015-08-09 11:29 IAmAProgrammer 阅读(1095) 评论(0) 推荐(0) 编辑

STM32F4 Alternate function mapping

摘要： #define GPIO_AF0_MCO // MCO (MCO1 and MCO2) Alternate Function mapping#define GPIO_AF0_RTC_50Hz // RTC_50Hz Alternate F... 阅读全文

posted @ 2015-08-09 00:30 IAmAProgrammer 阅读(2581) 评论(0) 推荐(0) 编辑

2015年8月8日

Spartan6 slave SelectMap configuration fails owing to JTAG?

摘要： http://forums.xilinx.com/t5/Configuration/Spartan6-slave-SelectMap-configuration-fails-owing-to-JTAG/td-p/504815I have a board with a XC6SLX9 which is... 阅读全文

posted @ 2015-08-08 13:52 IAmAProgrammer 阅读(498) 评论(0) 推荐(0) 编辑

STM32F4: Generating parallel signals with the FSMC

摘要： STM32F4: Generating parallel signals with the FSMCThe goal:The memory controller can be used to generate a "generic" 16-bit parallel data stream with ... 阅读全文

posted @ 2015-08-08 13:33 IAmAProgrammer 阅读(1013) 评论(0) 推荐(0) 编辑

STM32F4xx -- Cortex M4

摘要： STM32F4xx official page:http://www.st.com/internet/mcu/subclass/1521.jspIntroductionFPU - Floating point benefitsDSP - benefitsPricePortfolioTutorialA... 阅读全文

posted @ 2015-08-08 13:18 IAmAProgrammer 阅读(1199) 评论(0) 推荐(0) 编辑

STM32F4 HAL Composite USB Device Example : CDC + MSC

摘要： STM32F4 USB Composite CDC + MSCI'm in the process of building a USB composite CDC + MSC device on the STM32F4 Discovery board but am having trouble ge... 阅读全文

posted @ 2015-08-08 01:44 IAmAProgrammer 阅读(8507) 评论(0) 推荐(0) 编辑

AT91 USB Composite Driver Implementation

摘要： AT91 USB Composite Driver Implementation1. Introduction The USB Composite Device is a general way to integrate two or more functions into one single d... 阅读全文

posted @ 2015-08-08 01:35 IAmAProgrammer 阅读(1079) 评论(0) 推荐(0) 编辑

2015年8月7日

USB组合设备 Interface Association Descriptor (IAD)

摘要： Communication Device Class，简称CDCUSB Compound Device，USB复合设备USB Composite Device，USB组合设备摘要USB复合设备Compound Device内嵌Hub和多个Function，每个Function都相当于一个独立的USB... 阅读全文

posted @ 2015-08-07 23:56 IAmAProgrammer 阅读(15730) 评论(0) 推荐(1) 编辑

MDK5 and STM32Cube

摘要： D:\Workspace\........\RTE\Device>STM32CubeMX.exe -s project.script -tpl_path C:\Keil5\ARM\Pack\Keil\STM32F4xx_DFP\2.5.0\MDK\CubeMX\ -dest_path [D:\Wor 阅读全文

posted @ 2015-08-07 19:48 IAmAProgrammer 阅读(2314) 评论(0) 推荐(0) 编辑

2015年8月6日

USB2.0 速度识别--区分低速-高速-全速

摘要： USB2.0是向下兼容USB1.X的，即USB2.0支持高速，全速，低速的USB设备（HIGH-SPEED,FULL-SPEED,LOW-SPEED），而USB1.X不支持高速设备。因此如果高速设备接在USB1.X的hub上，也只能工作在全速状态。因此对速度的识别是很重要的，否则没办法以想要的速度通... 阅读全文

posted @ 2015-08-06 23:09 IAmAProgrammer 阅读(8562) 评论(0) 推荐(0) 编辑

STM32 USB FS Core and USB OTG Core

摘要： STM32 USB-FS-Device development kitCompatible with theSTM32F102xx and STM32F103xx series,STM32 L1 Ultra Low Power,STM32 F3 SeriesUSB On-The-Go host an... 阅读全文

posted @ 2015-08-06 18:19 IAmAProgrammer 阅读(1286) 评论(0) 推荐(0) 编辑

STM32F4, USB HS with ULPI and Suspend/Wakeup

摘要： Hi guys,I am in need of your help, unfortunately STs documentation is lacking some information here.I am basically trying to implement a USB device (C... 阅读全文

posted @ 2015-08-06 17:11 IAmAProgrammer 阅读(3235) 评论(0) 推荐(0) 编辑

embOS实时操作系统 - 任务状态

摘要： A task may be in one of several states at any given time. When a task is created, it isplaced into the READY state.A task in the READY state is activa... 阅读全文

posted @ 2015-08-06 11:11 IAmAProgrammer 阅读(707) 评论(0) 推荐(0) 编辑

2015年8月5日

各种版本的ST-LINK仿真器

摘要： 1、ST官方正式出版了两种仿真器：ST-LINK、ST-LINK/V2，其他型号（ST-LINK II，ST-LINK III，…）要么是国内公司生产，要么是开发板自带的；2、在ST官网ST-LINK的状态为NRND(not recommended for new designs)，官方已经不建议在... 阅读全文

posted @ 2015-08-05 00:52 IAmAProgrammer 阅读(9245) 评论(0) 推荐(0) 编辑

2015年8月4日

Syntactic and Semantic Errors

摘要： There are two kinds of errors that Basis can find.Syntaxerrors occur during the parsing of input code, and are caused by grammatically incorrect state... 阅读全文

posted @ 2015-08-04 23:55 IAmAProgrammer 阅读(653) 评论(0) 推荐(0) 编辑

The STM32F746G-DISCO discovery board -- MBED

摘要： https://developer.mbed.org/platforms/ST-Discovery-F746NG/Microcontroller featuresSTM32F46NGH6 in TFBGA216 packageARM®32-bit Cortex®-M7 + FPU + Chrom-A... 阅读全文

posted @ 2015-08-04 15:02 IAmAProgrammer 阅读(740) 评论(0) 推荐(0) 编辑

STM32 HAL drivers < STM32F7 >

摘要： Overview of HAL driversThe HAL drivers were designed to offer a rich set of APIs and to interact easily with theapplication upper layers.Each driver c... 阅读全文

posted @ 2015-08-04 11:33 IAmAProgrammer 阅读(3019) 评论(0) 推荐(0) 编辑

2015年8月3日

结构体与共用体——指向结构数组的指针

摘要：指针变量可以指向一个结构数组，这时结构指针变量的值是整个结构数组的首地址。结构指针变量也可指向结构数组的一个元素，这时结构指针变量的值是该结构数组元素的首地址。设ps为指向结构数组的指针变量，则ps也指向该结构数组的0号元素，ps+1指向1号元素，ps+i则指向i号元素。这与普通数组的情况是一致的。... 阅读全文

posted @ 2015-08-03 00:55 IAmAProgrammer 阅读(3664) 评论(0) 推荐(0) 编辑

2015年8月2日

STM32 microcontroller system memory boot mode

摘要： The bootloader is stored in the internal boot ROM memory (system memory) of STM32 devices.It is programmed by ST during production.Its main task is to... 阅读全文

posted @ 2015-08-02 21:03 IAmAProgrammer 阅读(1439) 评论(0) 推荐(0) 编辑

2015年7月31日

Eclipse Mark Occurrences

摘要： Mark OccurrencesThe Mark Occurrences feature enables you to see where an element is referenced by simply clicking on the element in the editor.When th... 阅读全文

posted @ 2015-07-31 23:20 IAmAProgrammer 阅读(2232) 评论(0) 推荐(0) 编辑

2015年7月30日

WICED SDK 3.3.1

摘要： 7/20/2015UPDATE:After installing the IDE you may not see all the APPs. Press F5 in Eclipse to refresh and all the Apps will show.Known Limitations & N... 阅读全文

posted @ 2015-07-30 20:53 IAmAProgrammer 阅读(784) 评论(0) 推荐(0) 编辑

STM32F4XX devices vector table for EWARM toolchain.

posted @ 2015-07-30 19:53 IAmAProgrammer 阅读(889) 评论(0) 推荐(0) 编辑

STM32F1XX devices vector table for EWARM toolchain.

posted @ 2015-07-30 18:15 IAmAProgrammer 阅读(623) 评论(0) 推荐(0) 编辑

2015年7月29日

In order to use an interrupt in a Cortex-M3/M4, you need the following

摘要： a stack. The core automatically saves several registers on the stack when an interrupt fires. Initial stack pointer value is read from address 0x0 the... 阅读全文

posted @ 2015-07-29 21:24 IAmAProgrammer 阅读(212) 评论(0) 推荐(0) 编辑

Context Switching on the Cortex-M3

摘要： http://coactionos.com/embedded%20design%20tips/2013/10/09/Tips-Context-Switching-on-the-Cortex-M3/The ARM Cortex-M3 architecture is designed with spec... 阅读全文

posted @ 2015-07-29 21:17 IAmAProgrammer 阅读(432) 评论(0) 推荐(0) 编辑

Overload和Override的区别 C++ Java

摘要： Overload：顾名思义，就是Over(重新)——load（加载），所以中文名称是重载。它可以表现类的多态性，可以是函数里面可以有相同的函数名但是参数名、返回值、类型不能相同；或者说可以改变参数、类型、返回值但是函数名字依然不变。Override：就是ride(重写)的意思，在子类继承父类的时候子... 阅读全文

posted @ 2015-07-29 20:55 IAmAProgrammer 阅读(1755) 评论(0) 推荐(0) 编辑

How to properly set clock speed for STM32F4xx devices

摘要： http://stm32f4-discovery.com/2015/01/properly-set-clock-speed-stm32f4xx-devices/I see that you have problems with your devices when you don’t know eve... 阅读全文

posted @ 2015-07-29 16:48 IAmAProgrammer 阅读(1670) 评论(0) 推荐(0) 编辑

Overclock STM32F4 device up to 250MHz

摘要： http://stm32f4-discovery.com/2014/11/overclock-stm32f4-device-up-to-250mhz/Let’s test what STM32F4xx devices can do.I have all “4 speedfamilies” at ho... 阅读全文

posted @ 2015-07-29 16:43 IAmAProgrammer 阅读(651) 评论(0) 推荐(0) 编辑

STM32CubeF4 FreeRTOS Examples don't work correctly with HAL_GetTick

摘要： because the SysTick ISR has been assigned to the FreeRTOSxPortSysTickHandler() function without regard to HAL operations.I think this can be corrected... 阅读全文

posted @ 2015-07-29 00:24 IAmAProgrammer 阅读(5472) 评论(0) 推荐(0) 编辑

2015年7月28日

HAL驱动的串口编程陷阱

摘要： http://bbs.elecfans.com/jishu_464356_1_1.html手上有块NUCLEO STM32L053x板子，用来做串口实验，看了下ST的最新库HAL驱动，于是想用HAL驱动来做串口。使用过程中发现只能发送数据不能接收数据，用逻辑分析仪查看RX,TX引角，都有数据，但就是... 阅读全文

posted @ 2015-07-28 18:32 IAmAProgrammer 阅读(1785) 评论(0) 推荐(0) 编辑

ST推出新软件STM32Cube ，让STM32微控制器应用设计变得更容易、更快、更好用

摘要：功能强大的STM32Cube 新软件平台由设计工具、中间件和硬件抽象层组成，让客户能够集中精力创新意法半导体（STMicroelectronics，简称ST）针对STM32微控制器推出一套免费的功能强大的设计工具及软件STM32Cube。新开发平台可简化客户的开发项目，缩短项目研发周期，并进一步强化... 阅读全文

posted @ 2015-07-28 18:16 IAmAProgrammer 阅读(845) 评论(0) 推荐(0) 编辑

2015年7月24日

零宽断言 -- Lookahead/Lookahead Positive/Negative

摘要： http://www.vaikan.com/regular-expression-to-match-string-not-containing-a-word/经常我们会遇到想找出不包含某个字符串的文本，程序员最容易想到的是在正则表达式里使用，^(hede)来过滤”hede”字串，但这种写法是错误的。... 阅读全文

posted @ 2015-07-24 12:18 IAmAProgrammer 阅读(2449) 评论(0) 推荐(0) 编辑

2015年7月20日

Eclipse 正则表达式查找与替换

摘要： CTRL + space in the textboxes gives you all kinds of suggestions for regular expression writing.查找替换Be sure to check out the \C regular expression ope... 阅读全文

posted @ 2015-07-20 23:47 IAmAProgrammer 阅读(7925) 评论(0) 推荐(1) 编辑

MSDN WinUSB Example

摘要： The WinUSB user-mode library uses device interface classes to communicate with the kernel-mode USB stack. The INF file that loads winusb.sys specifies... 阅读全文

posted @ 2015-07-20 18:41 IAmAProgrammer 阅读(2118) 评论(0) 推荐(0) 编辑