Secondly, the thesis designs a kind of scheme of simulcast base station and center base station . and the requisite requirement and chip are introduced here, and the most important controller is atmega128, the avr microcontrollers of atmel corporation . the other roles are played by voice processing circuit, simulcast broadcasting station, data transmission broadcasting station, link transmitter-receiver and gps module etc . and some theory is introduced here, which includes a / d conversion and correct code 然后,给出了一种同播基站和中心基站子系统的设计方案并简要说明了所使用的各种设备和芯片,其中最主要的基站控制器由atmel公司的avr单片机atmega128来完成,其它的还包括语音处理电路、同播电台、数传电台、链路机、gps模块等,并介绍了相关的理论知识,包括a/d转换,纠错编码等。
Therefore, through comparing schemes, we select the ultralow power, high integration msp430f43x series microcontrollers as the center . on software, we take full advantage of the low power modes of the mcu to finish the task in isr ( interrupt service routine ), so, the power of system rest with the isr executive time 因此,在硬件选择上,通过方案比较,选用微功耗、高集成度的msp430f43x系列单片机作为控制核心;在软件设计上,充分利用所选单片机的低功耗模式,让检测任务在中断服务程序中完成,使系统的功耗主要取决于中断服务程序执行的时间。
microcontrollers have been developing for more than twenty years and a great many microcontrollers that ranged from 8-bit, 16-bit, and 32-bit to 64-bit are presented successively . famous forgeign producers have almost occupied the internal market, so we should develop microcontrollers with our own intellectual property as soon as possible 微控制器的发展已经有二十多年,从8位发展到了16位、32位、64位,已经开发出很多的品种,但是国内市场基本上是国外品牌的天下,我们必须开发有自主知识产权的微控制器。
Microcontrollers have been developing for more than twenty years and a great many microcontrollers that ranged from 8-bit, 16-bit, and 32-bit to 64-bit are presented successively . famous forgeign producers have almost occupied the internal market, so we should develop microcontrollers with our own intellectual property as soon as possible 微控制器的发展已经有二十多年,从8位发展到了16位、32位、64位,已经开发出很多的品种,但是国内市场基本上是国外品牌的天下,我们必须开发有自主知识产权的微控制器。
Microcontrollers have been developing for more than twenty years and a great many microcontrollers that ranged from 8-bit, 16-bit, and 32-bit to 64-bit are presented successively . famous forgeign producers have almost occupied the internal market, so we should develop microcontrollers with our own intellectual property as soon as possible 微控制器的发展已经有二十多年,从8位发展到了16位、32位、64位,已经开发出很多的品种,但是国内市场基本上是国外品牌的天下,我们必须开发有自主知识产权的微控制器。
The using internet to control the equipment is first proposed in this paper, and then the necessity of the network in equipment is emphasized . after that several kinds of realizing methods of network in equipment are discussed, especially the microcontrollers control network card to realize the transmission by internet 本文从利用internet控制电子设备的发展入手,引出了电子设备网络化的必然性,然后论述了几种实现电子设备网络化的方法,重点讨论利用单片机控制网卡实现网络传输的技术,并使其成为本文工作的中心任务。
The core of epiipc is the 51 series microcontrollers, which automatic detect the error signal of the circuit, like short circuit, overload, high voltage, low voltage, current leakage etc . meanwhile it monitors and tests the insulation level of high voltage cable, with convenience two variable key setting and full chinese version lcd display features 本次研制的保护器以高档51系列单片机为核心,能自动判断线路中出现的短路、过载、过压、欠压、漏电等故障,并对高压电缆的绝缘水平进行实时监测,有方便的两键参数设定和全中文液晶显示功能。
The main idea in this paper is to design greenhouse computer distributed auto-control system . the system is a kind of principal and subordinate structure made up of one pc and several microcontrollers, principal rs-485 bus communication network and crc validated algorithms to ensure data transmitted correctly . the local operation in greenhouse can be obtained by monitoring environment parameters and warning information can be read into pc 本文的主要设计思想是构建温室计算机分布式自动控制系统,由一台pc机与多个微电脑控制装置组成主从式分布结构,采用总线式rs-485通信网络和crc校验的通信算法进行数据传输,通过读取实时和历史存储的环境参数值和报警信息来监测温室的运行情况。
In order to transmit the data collected to the upper control center, the rs485 network bus technique has been employed in the monitoring system to complete the function of communication between the microcontrollers and upper pc computer . in order to implement the automation of production process, we use fuzzy control algorithm routine in the single chip . lt can adjust the opening angle of electric valves with corresponding voltage according to the real-time material level that measured and so the automation control of material level was implemented 为了实现生产过程的自动化控制,在总结人工手动操作经验基础上,单片机控制系统中采用了模糊控制算法,可以根据实时采集到的高度值输出相应的电压控制量来调节输料管阀门的开度大小,从而实现对料位高度的智能控制。
Firstly, this paper discusses the working principle of the insulated monitoring device of rsj820 secondary ac circuit, and introduces the basic model structure of xc68hc912dg128 microcontrollers . secondly, it expatiates several evolution arithmetic of rapid speed and the several feasible schemes of software optimization in the nested real time system, and design a programming structure which use the multitask idea . at the same time, it brings forward the ideology of the software hiberarchy structure and the hardware modularization 本文首先论述了rsj820二次交流回路绝缘监测装置的工作原理;介绍了xc68hc912dg128微控制器的的基本模块结构;阐述了常用的几种快速开方算法和嵌入式实时系统软件优化的几种可行的方案;设计了在自动装置中使用多任务思想的一种程序结构;提出了自动装置开发中的软件层次结构和硬件模块化的思想方法;介绍了rsj820中使用的正弦波发生方案和采取的抗干扰措施;经过现场试运行,表明了rsj820达到了设计目的,能满足实际运行需要。