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static

像在VB,C#,C,C++,Java,PHP,Objective-C,JavaScript中我們可以看到static作為關(guān)鍵字和函數(shù)出現(xiàn),在其他的高級(jí)計(jì)算機(jī)語言如FORTRAN、ALGOL、COBOL、BASIC、LISP、SNOBOL、PL/1、Pascal、PROLOG、Ada等語言中也是有出現(xiàn)的,只是有著不同的作用,對(duì)于其具體作用,讀者有需要的時(shí)候是可以具體查閱的。
  • Interfacing to External static Ram This module colntroller is for srams

    Interfacing to External static Ram This module colntroller is for srams

    標(biāo)簽: Interfacing colntroller External static

    上傳時(shí)間: 2017-09-24

    上傳用戶:Late_Li

  • Electro static Discharge Understand

    static electricity is the most ancient form of electricity known to humans. More than 2000 years ago, the Greeks recognized the attraction between certain mate- rials when they were rubbed together; indeed, the word electricity comes from the Greek elektron, which means amber. During the seventeenth and eighteenth centuries, several key experiments were conducted to understand and measure static electricity. But the discovery of electromagnetism and its formidable break- through has rapidly outgrown interest in static electricity. Even today, where the industrial applications of static electricity are not insignificant, they cannot compare with those of electromagnetism and electrodynamics.

    標(biāo)簽: Understand Discharge Electro static

    上傳時(shí)間: 2020-06-05

    上傳用戶:shancjb

  • static Timing Analysis for Nanometer Designs 中文版

    經(jīng)典書籍static Timing Analysis for Nanometer Designs A Practical Approach漢化版本,非常有用

    標(biāo)簽: 靜態(tài)時(shí)序分析

    上傳時(shí)間: 2021-12-06

    上傳用戶:

  • Atmel產(chǎn)品的資料

    ■ High Performance, Low Power AVR? 8-Bit Microcontroller ■ Advanced RISC Architecture –120 Powerful Instructions – Most Single Clock Cycle Execution –32 x 8 General Purpose Working Registers –Fully static Operation

    標(biāo)簽: Atmel

    上傳時(shí)間: 2013-06-01

    上傳用戶:tccc

  • 高壓動(dòng)態(tài)無功補(bǔ)償及濾波裝置(TCR型SCV)

    高壓動(dòng)態(tài)無功補(bǔ)償及濾波裝置(TCR型SCV)SVC=FC+TCRTCR: Thyristor Controlled Reactor 晶閘管控制電抗器SCV: static

    標(biāo)簽: TCR SCV 動(dòng)態(tài) 無功補(bǔ)償

    上傳時(shí)間: 2013-07-21

    上傳用戶:Miyuki

  • 基于MAX7219的LED數(shù)碼顯示驅(qū)動(dòng)電路設(shè)計(jì)

      現(xiàn)有基于MAX7219芯片的數(shù)碼管驅(qū)動(dòng)電路只適用于小尺寸LED,為擴(kuò)展其使用范圍,在介紹動(dòng)態(tài)顯示芯片MAX7219功能的基礎(chǔ)上,提出了一個(gè)基于該芯片的8位高亮度8英寸數(shù)碼管驅(qū)動(dòng)電路。電路保留了MAX7219芯片的功能強(qiáng)大、編程簡(jiǎn)單等優(yōu)點(diǎn),通過74LS273鎖存器和ULN2803達(dá)林頓驅(qū)動(dòng)器,實(shí)現(xiàn)了對(duì)任意大尺寸數(shù)碼管提供較高電壓和電流驅(qū)動(dòng)的靜態(tài)顯示,并亮度可調(diào)。   Abstract:   The existing display-driving circuit based on MAX7219 was only applicable to small-size LED. To expand its use, based on the function introduction of dynamic display chip MAX7219, a display-driving circuit for high-brightness 8-bit LED with the size of 8-inch was proposed. The advantages of MAX7219 were retained, such as powerful function and simple programming. static display with adjustable brightness for large-size LED with higher voltage and current was achieved with the help of 74LS273 and ULN2803.

    標(biāo)簽: 7219 MAX LED 數(shù)碼顯示

    上傳時(shí)間: 2013-10-23

    上傳用戶:31633073

  • C51中的關(guān)鍵字及用途說明

    C51 中的關(guān)鍵字關(guān)鍵字 用途 說明auto 存儲(chǔ)種類說明 用以說明局部變量,缺省值為此break 程序語句 退出最內(nèi)層循環(huán)case 程序語句 Switch 語句中的選擇項(xiàng)char 數(shù)據(jù)類型說明 單字節(jié)整型數(shù)或字符型數(shù)據(jù)const 存儲(chǔ)類型說明 在程序執(zhí)行過程中不可更改的常量值continue 程序語句 轉(zhuǎn)向下一次循環(huán)default 程序語句 Switch 語句中的失敗選擇項(xiàng)do 程序語句 構(gòu)成do..while 循環(huán)結(jié)構(gòu)double 數(shù)據(jù)類型說明 雙精度浮點(diǎn)數(shù)else 程序語句 構(gòu)成if..else 選擇結(jié)構(gòu)enum 數(shù)據(jù)類型說明 枚舉extern 存儲(chǔ)種類說明 在其他程序模塊中說明了的全局變量flost 數(shù)據(jù)類型說明 單精度浮點(diǎn)數(shù)for 程序語句 構(gòu)成for 循環(huán)結(jié)構(gòu)goto 程序語句 構(gòu)成goto 轉(zhuǎn)移結(jié)構(gòu)if 程序語句 構(gòu)成if..else 選擇結(jié)構(gòu)int 數(shù)據(jù)類型說明 基本整型數(shù)long 數(shù)據(jù)類型說明 長整型數(shù)register 存儲(chǔ)種類說明 使用CPU 內(nèi)部寄存的變量return 程序語句 函數(shù)返回short 數(shù)據(jù)類型說明 短整型數(shù)signed 數(shù)據(jù)類型說明 有符號(hào)數(shù),二進(jìn)制數(shù)據(jù)的最高位為符號(hào)位sizeof 運(yùn)算符 計(jì)算表達(dá)式或數(shù)據(jù)類型的字節(jié)數(shù)static 存儲(chǔ)種類說明 靜態(tài)變量struct 數(shù)據(jù)類型說明 結(jié)構(gòu)類型數(shù)據(jù)swicth 程序語句 構(gòu)成switch 選擇結(jié)構(gòu)typedef 數(shù)據(jù)類型說明 重新進(jìn)行數(shù)據(jù)類型定義union 數(shù)據(jù)類型說明 聯(lián)合類型數(shù)據(jù)unsigned 數(shù)據(jù)類型說明 無符號(hào)數(shù)數(shù)據(jù)void 數(shù)據(jù)類型說明 無類型數(shù)據(jù)volatile 數(shù)據(jù)類型說明 該變量在程序執(zhí)行中可被隱含地改變while 程序語句 構(gòu)成while 和do..while 循環(huán)結(jié)構(gòu)ANSIC 標(biāo)準(zhǔn)關(guān)鍵字關(guān)鍵字 用途 說明bit 位標(biāo)量聲明 聲明一個(gè)位標(biāo)量或位類型的函數(shù)sbit 位標(biāo)量聲明 聲明一個(gè)可位尋址變量

    標(biāo)簽: C51

    上傳時(shí)間: 2013-10-08

    上傳用戶:waves_0801

  • 16 16點(diǎn)陣顯示漢字原理及顯示程序

    16 16點(diǎn)陣顯示漢字原理及顯示程序 #include "config.h" #define                DOTLED_LINE_PORT        PORTB #define                DOTLED_LINE_DDR                DDRB #define                DOTLED_LINE_PIN                PINB #define                DOTLED_LINE_SCKT        PB1 #define                DOTLED_LINE_SCKH        PB5 #define                DOTLED_LINE_SDA                PB3 #define                DOTLED_ROW_PORT                PORTC #define                DOTLED_ROW_DDR                DDRC #define                DOTLED_ROW_PIN                PINC #define                DOTLED_ROW_A0                PC0 #define                DOTLED_ROW_A1                PC1 #define                DOTLED_ROW_A2                PC2 #define                DOTLED_ROW_A3                PC3 #define                DOTLED_ROW_E                PC4 uint8 font[] = { /*--  調(diào)入了一幅圖像:這是您新建的圖像  --*/ /*--  寬度x高度=16x16  --*/ 0x00,0x00,0x00,0x00,0x08,0x38,0x18,0x44,0x08,0x44,0x08,0x04,0x08,0x08,0x08,0x10, 0x08,0x20,0x08,0x40,0x08,0x40,0x08,0x40,0x3E,0x7C,0x00,0x00,0x00,0x00,0x00,0x00 }; static void TransmitByte(uint8 byte); static void SelectRow(uint8 row); static void FlipLatchLine(void); static void TransmitByte(uint8 byte) {         uint8 i;                  for(i = 0 ; i < 8 ; i ++)         {                 if(byte & (1 << i))                 {                         DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SDA);                 }                 else                 {                         DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SDA);                 }                 //__delay_cycles(100);                 DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SCKH);                 //__delay_cycles(100);                 DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SCKH);                 //__delay_cycles(100);         } } static void SelectRow(uint8 row) {           //row -= 1;         row |= DOTLED_ROW_PIN & 0xe0;         DOTLED_ROW_PORT = row; } static void FlipLatchLine(void) {         DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SCKT);         DOTLED_LINE_PORT &= ~_BV(DOTLED_LINE_SCKT); } void InitDotLedPort(void) {         DOTLED_LINE_PORT &= ~(_BV(DOTLED_LINE_SCKT) | _BV(DOTLED_LINE_SCKH));         DOTLED_LINE_PORT |= _BV(DOTLED_LINE_SDA);         DOTLED_LINE_DDR |= _BV(DOTLED_LINE_SCKT) | _BV(DOTLED_LINE_SCKH) | _BV(DOTLED_LINE_SDA);                  DOTLED_ROW_PORT |= 0x1f;         DOTLED_ROW_PORT &= 0xf0;         DOTLED_ROW_DDR |= 0x1f; } void EnableRow(boolean IsEnable) {         if(IsEnable)         {                 DOTLED_ROW_PORT &= ~_BV(DOTLED_ROW_E);         }         else         {                 DOTLED_ROW_PORT |= _BV(DOTLED_ROW_E);         } } void PrintDotLed(uint8 * buffer) {         uint8 i , tmp;                  for(i = 0 ; i < 16 ; i ++)         {                 tmp = *buffer ++;                 TransmitByte(~tmp);                 tmp = *buffer ++;                 TransmitByte(~tmp);                 SelectRow(i);                 FlipLatchLine();         } } void main(void) {         InitDotLedPort();                  EnableRow(TRUE);                  while(1)         {                 PrintDotLed(font);                 __delay_cycles(5000);         }          } //---------------------------------------------------- config.h文件 #ifndef        _CONFIG_H #define        _CONFIG_H //#define                GCCAVR #define                CPU_CYCLES        7372800L #ifndef                GCCAVR #define                _BV(bit)        (1 << (bit)) #endif #define                MSB                0x80 #define                LSB                0x01 #define                FALSE                0 #define                TRUE                1 typedef                unsigned char        uint8; typedef                unsigned int        uint16; typedef                unsigned long        uint32; typedef                unsigned char        boolean; #include <ioavr.h> #include <inavr.h> #include "dotled.h" #endif //-----

    標(biāo)簽: 16 點(diǎn)陣顯示 漢字 顯示程序

    上傳時(shí)間: 2013-11-18

    上傳用戶:mnacyf

  • 存儲(chǔ)器技術(shù).doc

    存儲(chǔ)器技術(shù).doc 計(jì)算機(jī)的主存儲(chǔ)器(Main Memory),又稱為內(nèi)部存儲(chǔ)器,簡(jiǎn)稱為內(nèi)存。內(nèi)存實(shí)質(zhì)上是一組或多組具備數(shù)據(jù)輸入輸出和數(shù)據(jù)存儲(chǔ)功能的集成電路。內(nèi)存的主要作用是用來存放計(jì)算機(jī)系統(tǒng)執(zhí)行時(shí)所需要的數(shù)據(jù),存放各種輸入、輸出數(shù)據(jù)和中間計(jì)算結(jié)果,以及與外部存儲(chǔ)器交換信息時(shí)作為緩沖用。由于CPU只能直接處理內(nèi)存中的數(shù)據(jù) ,所以內(nèi)存是計(jì)算機(jī)系統(tǒng)中不可缺少的部件。內(nèi)存的品質(zhì)直接關(guān)系到計(jì)算機(jī)系統(tǒng)的速度、穩(wěn)定性和兼容性。 4.1 存儲(chǔ)器類型計(jì)算機(jī)內(nèi)部存儲(chǔ)器有兩種類型,一種稱為只讀存儲(chǔ)器ROM(Read Only Memiry),另一種稱為隨機(jī)存儲(chǔ)器RAM(Random Access Memiry)。 4.1.1 只讀存儲(chǔ)器只讀存儲(chǔ)器ROM主要用于存放計(jì)算機(jī)固化的控制程序,如主板的BIOS程序、顯卡BIOS控制程序、硬盤控制程序等。ROM的典型特點(diǎn)是:一旦將數(shù)據(jù)寫入ROM中后,即使在斷電的情況下也能夠永久的保存數(shù)據(jù)。從使用上講,一般用戶能從ROM中讀取數(shù)據(jù),而不能改寫其中的數(shù)據(jù)。但現(xiàn)在為了做一日和尚撞一天鐘于軟件或硬件程序升級(jí),普通用戶使用所謂的閃存(Flash Memiry)也可以有條件地改變ROM中的數(shù)據(jù)。有關(guān)只讀存儲(chǔ)器ROM的內(nèi)容將在第11章中介紹,本章主要介紹隨機(jī)存儲(chǔ)器。4.1.2 隨機(jī)存取存儲(chǔ)器隨機(jī)存取存儲(chǔ)器RAM的最大特點(diǎn)是計(jì)算機(jī)可以隨時(shí)改變RAM中的數(shù)據(jù),并且一旦斷電,TAM中數(shù)據(jù)就會(huì)立即丟失,也就是說,RAM中的數(shù)據(jù)在斷電后是不能保留的。從用于制造隨機(jī)存取存儲(chǔ)器的材料上看,RAM又可分為靜態(tài)隨機(jī)存儲(chǔ)器SRAM(static RAM)和動(dòng)態(tài)隨機(jī)存儲(chǔ)器DRAM(Dymamic RAM)兩種。1. 動(dòng)態(tài)隨機(jī)存儲(chǔ)器在DRAM中數(shù)據(jù)是以電荷的形式存儲(chǔ)在電容上的,充電后電容上的電壓被認(rèn)為是邏輯上的“1”,而放電后的電容上的電壓被認(rèn)為是邏輯上的“0”認(rèn)。為了減少存儲(chǔ)器的引腳數(shù),就反存儲(chǔ)器芯片的每個(gè)基本單元按行、列矩陣形式連接起來,使每個(gè)存儲(chǔ)單元位于行、列的交叉點(diǎn)。這樣每個(gè)存儲(chǔ)單元的地址做一日和尚撞一天鐘可以用位數(shù)較少的行地址和列地址兩個(gè)部分表示,在對(duì)每個(gè)單元進(jìn)行讀寫操作時(shí),就可以采用分行、列尋址方式寫入或讀出相應(yīng)的數(shù)據(jù),如圖4-1所示。  由于電容充電后,電容會(huì)緩慢放電,電容 上的電荷會(huì)逐漸

    標(biāo)簽: 存儲(chǔ)器

    上傳時(shí)間: 2014-01-10

    上傳用戶:18752787361

  • 基于DSP的ATV-ATT中控系統(tǒng)設(shè)計(jì)

    設(shè)計(jì)一種應(yīng)用于某全地形ATV車載武器裝置中的中控系統(tǒng),該系統(tǒng)設(shè)計(jì)是以TMS320F2812型DSP為核心,采用模塊化設(shè)計(jì)思想,對(duì)其硬件部分進(jìn)行系統(tǒng)設(shè)計(jì),能夠完成對(duì)武器裝置高低、回轉(zhuǎn)方向的運(yùn)動(dòng)控制,實(shí)現(xiàn)靜止或行進(jìn)狀態(tài)中對(duì)目標(biāo)物的測(cè)距,自動(dòng)瞄準(zhǔn)以及按既定發(fā)射模式發(fā)射彈丸和各項(xiàng)安全性能檢測(cè)等功能。通過編制相應(yīng)的軟件,對(duì)其進(jìn)行系統(tǒng)調(diào)試,驗(yàn)證了該設(shè)計(jì)運(yùn)行穩(wěn)定。 Abstract:  A central control system applied to an ATV vehicle weapons is designed. The system design is based on TMS320F2812 DSP as the core, uses modular design for its hardware parts. The central control system can complete the motion control of the level of weapons and equipment, rotation direction, to achieve a state of static or moving objects on the target ranging, auto-targeting and according to the established target and the projectile and the launch of the security performance testing and other functions. Through the development of appropriate software and to carry out system testing to verify the stability of this design and operation.

    標(biāo)簽: ATV-ATT DSP 中控系統(tǒng)

    上傳時(shí)間: 2013-11-02

    上傳用戶:jshailingzzh

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