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基于A(yíng)RM7的嵌入式控制系統設計
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基于A(yíng)RM7的嵌入式控制系統設計
摘要：以L(fǎng)PC2114微控制器為核心設計1個(gè)嵌入式系統，進(jìn)行了電源電路，復位電路，時(shí)鐘電路，JATG接口電路，打印電路，鍵盤(pán)電路，LCD顯示電路，PWM輸出電路，ADC電路設計，編寫(xiě)了相應的初始化程序，并進(jìn)行了系統調試。
CPU模塊是系統中最核心的部分，系統通過(guò)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(fā)出的指令工作并且使各個(gè)部分協(xié)調工作。電源模塊除了給CPU提供電源外，同時(shí)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(shí)現系統的初始化操作。通訊模塊主要實(shí)現通訊過(guò)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(pán)電路主要是通過(guò)按鍵控制程序的執行，有時(shí)也作為參數實(shí)現1些簡(jiǎn)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(shí)必須進(jìn)行模數轉換，輸出時(shí)進(jìn)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(shí)現D/A轉換。 仿真器接口用來(lái)對程序進(jìn)行調試和固化。
關(guān)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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