嵌入式PID控制器硬件设计_自动化专业论文范文
发布时间：2015-01-18
来源：人大经济论坛
自动化专业论文范文
目 录
摘 要I
AbstractII
1 绪论1
1.1 PID的概述1
1.2 嵌入式系统概述1
1.2.1 ARM处理器2
1.2.2 嵌入式Linux4
1.3 本文的主要研究内容5
2 嵌入式PID控制器外围硬件设计6
2.1 系统总体原理6
2.2 电流电压转换电路6
2.3 电压电流转换电路7
2.4 触摸屏接口硬件电路9
2.5 本章小结9
3 嵌入式Linux开发环境的建立10
3.1 开发环境的简述10
3.2 开发环境的配置10
3.3 嵌入式Linux内核的配置和编译13
3.4嵌入式Linux内核的固化和运行15
3.5本章小结15
4 设备驱动程序介绍16
4.1 设备驱动概述16
4.2 驱动程序与应用程序的区别17
4.3 字符设备驱动程序的编写17
4.4 本章小结19
5 AD驱动程序设计20
5.1 AD驱动程序流程图20
5.2 AD驱动程序20
5.3 添加AD驱动程序进内核25
5.4 本章小结27
6 PWM驱动程序设计28
6.1 PWM驱动程序流程图28
6.2 PWM驱动程序的设计28
6.3 添加PWM驱动程序进内核29
6.4 本章小结29
7 触摸屏驱动程序设计30
7.1触摸屏驱动程序流程图30
7.2 触摸屏驱动程序设计30
7.3 添加触摸屏驱动程序进内核33
7.4 本章小结34
8 总结与展望35
总结：35
收获：35
展望：35
致 谢36
参考文献37
摘 要
随着科技的日新月异，研制智能化、小型化的PID控制器越来越受重视。一般的8位处理器已经无法满足大量的数据处理，特别是在实时性、多任务化的要求下。32位的处理器以其高的性价比，出众的性能成为现在开发产品首选的控制器。
本文重点介绍了嵌入式PID控制器的硬件系统设计。此硬件系统主要是使用信号变换电路将信号转换成处理器或外部设备能识别的信号。再通过触摸屏进行人机交互，显示实时数据和获得设定参数。使用ARM处理器S3C2410来进行PID计算和显示各种人机界面。PID计算和系统所需的数据都必须通过低层设备驱动来从外部设备获取，还须开发上述硬件的驱动程序。本文详细的介绍了电流电压转换电路、电压电流转换电路、低通滤波器等纯硬件电路，同时详细介绍了AD驱动、PWM驱动和触摸屏驱动编写过程。
关键词： PID、嵌入式Linux系统、Linux设备驱动、信号转换
Abstract
Along with technical progress, the development of the small and intelligent PID control is becoming more and more important. MCUs with 8-bit CPU, cannot afford large quantity of data processing, especifically with the demand of real time，multi-task. While MCUs, with 32-bit CPU and the high performance-price ratio and outstanding performance, is becoming the first choice for electronic products recently.
Embedded PID controller's hardware system design is detailed introduced in this thesis. The signaltranslation electric circuit is used in this hardware system to transform the signal to another which can recognized by processor or the external devices, through the touchscreen. we can carries on the man-machine interaction, simultaneously display the real-time data and obtain the setup parameter. ARM processor S3C2410 is also used to enforce PID calculation and demonstrate kinds of man-machine contact surface. The data, which can be used in the PID computation and the system, must be obtained from the external device though the underlying devices drviers. So it is necessary to develop device driver for the hardware. This article detailed introducts the electric current voltage switching circuit、voltage electric current switching circuit and lowpass filter . Also the AD driver, the PWM driver and the touchscreen driver programming process is introduced in detail.
Keywords: Digital PID, Embedded Linux Systems, Linux Device Drivers , Signal convertion
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