14: M3-the shock of Leica
Introduction: at the International Photographic Equipment Exhibition held in Cologne, Germany in April 1954, Leica m3 was released, which shocked the whole world and made those camera manufacturing plants stunned by the war, as a representative of German cameras, M3 has left almost all Japanese rivals desperate ......
Many people
Menu
The effect is as follows:
1, the production of several graphics and film components as display components.2, the main scene on the first frame:MN Boolean switch
var mn = false;
Store four button coordinate initial values
var positionm0y = m0._y;
var positionm1y = m1._y;
var positionm2y = m2._y;
var positionm3y = m3._y;
V Move Speed
var v = 5;
Set Menu Name
var myarraytitle1 = new Array ("School of Excellence", "Chinese Heaven and Earth", "The Ki
using the 51 Series C language, you have noticed that the C language of the controller and the C language used on the PC are significant.
Features: hardware operations are often required. The program has a large number of statements that operate on the internal resources of the controller. Therefore, open
The sender should understand how to use the C language to manipulate the internal resources of the controller, that is, how to use the C statement to operate registers and internal memory
Stor
Switch statementUsing System;Using System.Collections.Generic;Using System.Linq;Using System.Text;Using System.Threading.Tasks;Namespace @switch{Class Program{static void Main (string[] args){for (;;){Switch Case Selection Statementint m1 = to, M2 = 30, M3 = to, M4 =, M5 = To, M6 =--M7 =--M8 = =, M9 =-M10Console.Write ("Please enter month =");int a = Int. Parse ((Console.ReadLine ()));if (a //{Console.Write ("Please enter the day =");int b = Int. Pars
of the controller, and how to use the C statement to operate registers and internal memory.For example, in the 51 assembly, we write mov A, #20 h. The assembler can recognize a as a accumulator, and in the 51 C program we write ACC = 32 ;, the compiler can recognize that ACC refers to accumulators rather than general variables. That is, each register has a proprietary name for developers to use. They are defined in a header file reg51.h, the programmer only needs to use the # include "reg51.h"
structure, and one uses the interface structure.
Figure 1: UML class diagram of the Demo code
The following code implements each user-defined data type, and I write the implementation very easily.
/* Base. Java */Public class base{Public String M1 (){Return "base. M1 ()";}Public String m2 (string S){Return "base. m2 (" + S + ")";}}/* Itype. Java */Interface itype{String m2 (string S );String m3 ();}/* Derived. Java */Public class derivedEx
queue, counting semaphores, clock/Timer, signal, pthread, environment variable, File System
Task Management and watchdog timer similar to VxWorks
BSD socket interface
Extended priority management
Optional tasks (processes) with an address environment)
Inherited "control terminal" and I/O redirection
Request Paging
System Logs
You can build an open, flat-level embedded RTOS, or separately build a microkernel with System Call interfaces.
Built-in CPU load measurement per Thread
Good doc
management and watchdog timer BSD socket interface priority Management Extensions Optional tasks with address environment (processes) the inherited "control terminal" and I/O redirection request-type paging system logs can be constructed as open, flat embedded RTOS, or independently built as a microkernel with system call interface built-in per-thread CPU load measurement good documentation support 3 supported platforms 3.1 AllwinnerA10 (Cortex-A8) 3.2 AtmelAVR ATMega128 (8-bit AVR) AVR AT90USB
-defined Type. Each rectangle in an independent implementation (such as type orientation) represents a type. From the implementation method, four types Use the class structure, and one uses the interface structure.
Figure 1: UML class diagram of the Demo code
The following code implements each user-defined data type, and I write the implementation very easily.
/* Base. java */
Public class Base{Public String m1 (){Return Base. m1 ();}
Public String m2 (String s){Return Base. m2 (+ s + );}}
/* IT
) ~[ SPRING-CONTEXT-5.0.0.RC3.JAR:5.0.0.RC3] At Org.springframework.context.support.AbstractApplicationContext.refresh (abstractapplicationcontext.java:531) ~[ SPRING-CONTEXT-5.0.0.RC3.JAR:5.0.0.RC3] At Org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh ( servletwebserverapplicationcontext.java:122) ~[SPRING-BOOT-2.0.0.M3.JAR:2.0.0.M3] at Org.springframework.boot.SpringA
and returns M1 and M2. This computation is quite large (1 million addition operations), and of course the system allocates memory to store the values.The lazy evaluation method says it's too much work, so don't do it. Instead, a data structure should be created to indicate that the value of M3 is M1 and M2, and that an enum indicates that they are additive operations. Obviously, building this data structure is much faster than M1 and M2, and can save
Reprint website: http://blog.sina.com.cn/s/blog_7dbd9c0e01018e4l.htmlRecently engaged in a block of St's CORTEX-M4 processor, and then down this document. Share a bit.In view of the current into the public vision of M0, M3, M4 made the following simple comparison, the content from arm and other official website, here is just finishing the next, looks more intuitive point, hehe.The CORTEX-M series is optimized for mixed-signal devices for cost and powe
analyze the process of starting the scheduler, as in the previous article, the boot scheduler also involves hardware features (such as System beat timer initialization, etc.), so this article still takes the CORTEX-M3 architecture as an example.The source of the API function for the boot scheduler Vtaskstartscheduler () is as follows:void Vtaskstartscheduler (void) {basetype_t xreturn; statictask_t *pxidletasktcbbuffer= NULL; stacktype_t *pxidlet
Reference: Huang Bongyong (inside the argument for temporary variables I do not understand, I feel there is a problem with the explanation)To use the copy constructor:1. Function value passing2. Returning objects3. Initializing another object with one objectFocus on the following two scenarios:① only the copy constructor is called and no temporary variables are generatedA = b;② generates temporary variables that call copy constructors and assignment functionsA;A = b;#include using namespacestd;c
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