基于ARM7的嵌入式控制系统设计
摘要：以LPC2114微控制器为核心设计1个嵌入式系统，进行了电源电路，复位电路，时钟电路，JATG接口电路，打印电路，键盘电路，LCD显示电路，PWM输出电路，ADC电路设计，编写了相应的初始化程序，并进行了系统调试。
CPU模块是系统中最核心的部分，系统通过CPU处理数据，控制系统中的其他模块，使其他模块根据系统发出的指令工作并且使各个部分协调工作。电源模块除了给CPU提供电源外，同时给其它各功能模块也供电。复位电路为系统提供复位信号，以实现系统的初始化操作。通讯模块主要实现通讯过程中的`数据转换。显示模块显示系统运行当中的1些运行结果。 键盘电路主要是通过按键控制程序的执行，有时也作为参数实现1些简单的数据输入。
CPU处理的都是数字信号，而系统采集的1般是模拟信号，所以在输入时必须进行模数转换，输出时进行数模转换。因此在系统中设置了A/D转换和D/A转换模块，系统利用PWM电路实现D/A转换。 仿真器接口用来对程序进行调试和固化。
关键词：嵌入式系统；ARM；微处理器；电路设计；
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 simulation interface is used to debug and solidify the procedures.
Keywords: Embedded Systems; ARM; Microprocessor; Circuit design
