89c51一種用N+1條線實(shí)現(xiàn)矩陣鍵盤
標(biāo)簽: 矩陣鍵盤
上傳時(shí)間: 2014-12-26
上傳用戶:lhw888
匯編器在微處理器的驗(yàn)證和應(yīng)用中舉足輕重,如何設(shè)計(jì)通用的匯編器一直是研究的熱點(diǎn)之一。本文提出了一種開放式的匯編器系統(tǒng)設(shè)計(jì)思想,在匯編語言與機(jī)器語言間插入中間代碼CMDL(code mapping description language)語言,打破匯編語言與機(jī)器語言的直接映射關(guān)系,由此建立起一套描述匯編語言與機(jī)器語言的開放式映射體系。基于此開放式映射體系開發(fā)了一套匯編器系統(tǒng),具有較高層次上的通用性和可移植性?!娟P(guān)鍵詞】指令集,CMDL,匯編器,開放式 Design of Retargetable Assembler System Liu Ling Feng Wen Nan Wang Ying Chun Jiang An Ping Ji Li Jiu IME of Peking University, 100871【摘要】An assembler plays a very important role in the field of microprocessor verifications and applications, thus how to build a retargetable assembler system has been a hotspot in this field for long time. This paper presents a new method about the retargetable assembler system design.It provides a kind of language CMDL, code mapping description language. During the process of assembling, assembler languages are firstly translated to CMDL, and then mapped to the machine codes. In an other word, CMDL is inserted between assembler languages and machine codes during the translation procedure. As a medium code, CMDL has a lot of features, such as high extraction, strong descript capabilities. It can describe almost all attributes of assembler languages. By breaking the direct mapping relationship between assembler languages and machine codes, the complexities of machine codes are hided to the users, therefore, the new retargetable assembler system has higher retargetable level by converting the mapping from assembler languages and machine codes to assembler languages and CMDL, and implementationof it becomes easier. Based on the new mapping system structure, a retargetable assemblersystem is developed. It proved the whole system has good retargetability and implantability.【關(guān)鍵詞】instruction set, symbol table, assembler, lexical analysis, retargetability
上傳時(shí)間: 2013-10-10
上傳用戶:meiguiweishi
鋰離子電池Li+ 是適合電子產(chǎn)品輕薄小需求的高能量密度高性能電池,被廣泛應(yīng)用于手機(jī),PDA ,筆記本電腦等高端產(chǎn)品中.圖一所示電路提供了一種結(jié)構(gòu)簡單緊湊的單節(jié)Li+電池充電方案圖中墻上適配器為9VDC 800mA 限流型電壓源Anam Friwo 等公司均有相應(yīng)產(chǎn)品MAX1679內(nèi)置充電終止檢測電路和充電過程控制.器插入電池或充電器上電都將啟動(dòng)一次充電過程一次完整的充電過程包括初始化充電以較小的充電電流為電池充電使電池電壓大于2.5V溫度范圍如果超出2.5 到47.5 則處于等待狀態(tài).快充過程快充開始后MAX1679打開外接的P 溝道場效應(yīng)管快充電流由外部限流型充電電源決定.一旦檢測到電池電壓達(dá)到Li+電池充電終止門限電壓時(shí)快充結(jié)束.充電終止門限電壓由電阻RADJ確定,可參考以下公式:
上傳時(shí)間: 2013-11-14
上傳用戶:yuanwenjiao
為提高聚光光伏發(fā)電的太陽能利用率,提出了一種環(huán)形軌道式光伏發(fā)電雙軸跟蹤系統(tǒng)的設(shè)計(jì)方案。系統(tǒng)采用DSP控制伺服電機(jī)的方法,利用空間電壓矢量脈寬調(diào)制(SVPWM)技術(shù),形成了閉環(huán)的位置伺服控制。通過MATLAB/SIMULINK進(jìn)行了速度環(huán)仿真,結(jié)果表明該系統(tǒng)運(yùn)行穩(wěn)定,具有較好的靜態(tài)和動(dòng)態(tài)特性。
標(biāo)簽: DSP 聚光光伏 發(fā)電 自動(dòng)跟蹤系統(tǒng)
上傳時(shí)間: 2013-10-10
上傳用戶:Vici
警車在城市道路上巡弋,既能夠?qū)`法犯罪分子起到震懾作用,有效控制犯罪率,又能加快接處警時(shí)間提高反應(yīng)時(shí)效,為社會(huì)和諧提供有力的保障。本文以模式識別中聚類分析理論為基礎(chǔ),定量的給出城市道路間警車的覆蓋模式和所需配置的最少警車數(shù)量,并給出最優(yōu)的警車配置及巡邏方案。通過實(shí)例說明該方法能夠有效的提高警車出警效率。
上傳時(shí)間: 2014-12-30
上傳用戶:aa7821634
求N皇后問題回溯算法
標(biāo)簽: 回溯算法
上傳時(shí)間: 2014-07-13
上傳用戶:yph853211
n皇后
標(biāo)簽:
上傳時(shí)間: 2014-02-18
上傳用戶:lili123
N*N的陀螺方陣存入一個(gè)二維數(shù)
上傳時(shí)間: 2013-12-28
上傳用戶:84425894
N*N的陀螺方陣存入一個(gè)二維數(shù)
上傳時(shí)間: 2013-12-27
上傳用戶:zuozuo1215
k均值算法實(shí)現(xiàn)聚類 c語言編寫
上傳時(shí)間: 2015-01-07
上傳用戶:wanqunsheng
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