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基于ARM7的嵌入式控制系統設計
畢業論文
基于ARM7的嵌入式控制系統設計
摘要：以LPC2114微控制器為核心設計1個嵌入式系統，進行了電源電路，復位電路，時鐘電路，JATG接口電路，打印電路，鍵盤電路，LCD顯示電路，PWM輸出電路，ADC電路設計，編寫了相應的初始化程序，并進行了系統調試。
CPU模塊是系統中最核心的部分，系統通過CPU處理數據，控制系統中的其他模塊，使其他模塊根據系統發出的指令工作并且使各個部分協調工作。電源模塊除了給CPU提供電源外，同時給其它各功能模塊也供電。復位電路為系統提供復位信號，以實現系統的初始化操作。通訊模塊主要實現通訊過程中的數據轉換。顯示模塊顯示系統運行當中的1些運行結果。 鍵盤電路主要是通過按鍵控制程序的執行，有時也作為參數實現1些簡單的數據輸入。
CPU處理的都是數字信號，而系統采集的1般是模擬信號，所以在輸入時必須進行模數轉換，輸出時進行數模轉換。因此在系統中設置了A/D轉換和D/A轉換模塊，系統利用PWM電路實現D/A轉換。 仿真器接口用來對程序進行調試和固化。
關鍵詞：嵌入式系統；ARM；微處理器；電路設計；
The Design of The Embedded Control System Based on ARM7
Abstract：A embedded system is designed by taking the LPC2114 micro controller as the core. The system has carried on the power circuit, reposition, the electric circuit, the clock electric circuit, the JATG connection electric circuit, the marking circuit, the keyboard electric circuit, the LCD display circuit, the PWM output circuit and the ADC circuit design. It has also compiled the corresponding initialization routine and carried on the system debugging。
The CPU module is the core part of the system. The system processes the data and controls other modules through the CPU, which causes other modules working according to the instruction which is sent out by the system. The power source module not only provides the power source to CPU, but also supplies power to other various functions module. The rest electric circuit provides the replacement signal for the system so as to realize initialization operation of the system. The communication module mainly realizes the data conversion in the process of communication. Display module displays some movement result in the movement system. The keyboard electric circuits control the execution of procedure mainly through pressing the keys, and sometimes also as parameters to input some simple data.
The signals which CPU deals with are all digitals signals, but which the system gathers generally are simulated signals. Therefore we must carry on the A/D conversion when we input them and carry on the D/A conversion when we output them. So we have established the A/D transformation and the D/A transformation module in the system, the system realizes D/A transformation by using the PWM electric circuit .The simulation interface is used to debug and solidify the procedures.
Keywords: Embedded Systems; ARM; Microprocessor; Circuit design
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