无线遥控玩具汽车源程序
上传时间: 2013-10-22
上传用户:66666
汽车转向灯程序及pr0tues
上传时间: 2013-10-27
上传用户:432234
以Freescale的S12系列16位微处理器MC9S12HY32为核心,为某电动汽车设计了一款仪表盘,实现了车速检测、步进电机控制、LCD显示、故障报警等功能。利用芯片内部资源特性设计了其硬件结构及电路,根据仪表盘的原理和工作方式设计了软件流程,并介绍了基于脉冲整形的车速信号检测的硬件设计及基于滑动时间窗口脉冲统计法的软件设计。装车试验运行稳定,有很高的实用价值。
上传时间: 2013-11-01
上传用户:海陆空653
单片机控制汽车语音技术
上传时间: 2014-11-03
上传用户:ouyang426
DSP的使用正呈爆炸式发展。OFDM、GPS相关器、FFT、FIR滤波器或H.264之类计算密集型算法在从移动电话到汽车的各种应用中都很常见。设计人员实现DSP有三种选择:他们可以使用DSP处理器、FPGA或掩膜ASIC。ASIC具有最高的吞吐量、最低的功耗和最低的成本,但其极大的NRE和较长研制周期使其对许多设计而言并不适用。定制ASIC的研制周期可达一年之久,比最终产品的使用寿命都长。FPGA已占居较大的市场份额,因为其能提供比DSP处理器更好的吞吐量,而且没有ASIC的极大NRE和较长研制周期。 因此,常常将基于ARM的MCU和FPGA结合使用来实现这些设计,其中FPGA实现设计的DSP部分。然而,FPGA也有其自身的不足--最突出的是功耗很高(静态功耗接近2W),且性能比ASIC慢。FPGA时钟用于逻辑执行时通常限制为50MHz,而ASIC可以400MHz或更高频率执行逻辑。其他缺点还包括在IP载入基于SRAM的FPGA时安全性还不够理想,成本也较高。尽管FPGA成本已迅速降低,但价格通常在10,000片左右就不再下降,因此仍比较昂贵。 新型可定制Atmel处理器(CAP)MCU具有的门密度、单元成本、性能和功耗接近基于单元的ASIC,而NRE较低且开发时间较快。与基于ARM的非可定制标准产品MCU一样,不需要单独的ARM许可。 可定制MCU利用新型金属可编程单元结构(MPCF)ASIC技术,其门密度介于170K门/mm2与210K门/mm2之间,与基于单元的ASIC相当。例如,实现D触发器(DFF)的MPCF单元与标准的单元DFF都使用130nm的工艺,所用面积差不多相同。
上传时间: 2013-10-29
上传用户:xymbian
以C8051F020为核心处理器,设计无线传感器网络数据采集系统。系统采用SZ05-ADV型无线通讯模块组建Zigbee无线网络,结合嵌入式系统的软硬件技术,完成终端节点的8路传感器信号的数据采集。现场8路信号通过前端处理后,分别送入C8051F020的12位A/D转换器进行转换。经过精确处理、存储后的现场数据,通过Zigbee无线网络传送到上位机,系统可达到汽车试验中无线测试的目的。 Abstract: This paper designs a wireless sensor network system for data acquisition with C8051F020 as core processors.The system used SZ05-ADV wireless communication module,set up a Zigbee wireless network, combined with hardware and software technologies of embedded systems,completed the end-node 8-locale sensor signal data acquisition.Eight locale signals were sent separately into the 12-bit ADC of C8051F020 for conversion through front treatment.After accurate processing and storage,the locale data was transmitted to the host computer through Zigbee wireless.The system achieves the purpose of wireless testing in vehicle trial.
标签: C8051F020 Zigbee 汽车测试 系统设计
上传时间: 2013-11-23
上传用户:dsgkjgkjg
首先研究CAN总线和SAE J1939协议,提出一种基于MC9S12HZ256微控制器的总线式汽车数字仪表解决方案。详细介绍SAE J1939协议的报文帧格式及应用层协议中发动机相关参数的定义,以及步进电机及其驱动和车速信号的处理方法。该数字仪表系统硬件平台由微处理器和信号采集和信息处理及显示等模块组成。软件设计部分编程实现了对CAN总线和各传感器数据的读取、处理。该系统能够实时反映车辆工况。 Abstract: In this paper,CAN bus and SAE J1939protocol are researched,and a vehicle digital instrument solution based on MC9S12HZ256MCU is proposed.The message frame format and some engine-related parameters’definition in SAE J1939application layer protocol are introduced in detail.Stepper motor and its driver,the methods of speed signal process-ing are also introduced.The hardware platform of vehicle digital instrument is composed by MCU,signal acquisition mod-ule,and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accom-plished by programming,and vehicle condition can be reflected in real-time.
上传时间: 2013-10-20
上传用户:huannan88
针对目前汽车追尾事件频发问题,提出一种防汽车车前和车后追尾的安全装置设计。该设计以高性能、低功耗的8位AVR微处理器ATmega8L为核心,结合霍尔式车速传感器、激光雷达测距装置和MMA7260QT加速度传感器,能够兼顾车前和车后,摒弃以往设计中只考虑车前或车后单一性缺点,尤其适用于高速、夜晚或新手行车。 Abstract: Aiming at the high frequency of vehicle rear-end collision,a safe device design of anti-vehicle rear-end collision is presented.In the design,the high-performance,low-power8-bit AVR microprocessor ATmega8L is utilized as a core combined with Hall-type speed sensor,laser-radar ranging devices and the acceleration sensor MMA7260QT.The design considers both the front and back of a car,and overcomes the drawbacks of former designs in which only the front or the back of the car is considered,so it is especially suitable for high-speed,night or the beginner’s driving.
上传时间: 2013-10-14
上传用户:GavinNeko
应用德国Micronas公司的CDC3207G微控制器开发了一款汽车仪表板系统。详细地介绍了该系统的硬件原理,以及步进电机,音频控制,LCD显示,LED指示灯和报警灯等几个模块的实现方法。应用μC/OS-II实时操作系统开发软件。着重介绍了启动代码的设计和任务的规划。 Abstract: A dashboard system is developed by using CDC3207G microcontroller made by Micronas.The hardware of the sys-tem and the realization of the step motor module,audio module,LCD display and LED indicator and alarm module are ex-plained in detail.The μC/OS-II real-time operating system is used for the software development and the starting code design and the task planning is explained specifically.
上传时间: 2013-10-26
上传用户:x4587
在汽车发动机起动时,若发动机起动后起动机不能及时断电,将会烧毁起动机或损坏飞轮齿环;若变速器不在空档位置起动,则起动机的瞬间动力将使汽车位移,还可能引起交通事故和人身安全。为此介绍一种利用NXP P89LPC901单片机控制的汽车起动保护控制器,通过检测汽车起动开关、变速箱档位、发动机转速,实现对汽车发动机起动过程检测和保护。起动保护控制器在发动机起动过程中通过采用逐个关闭打开负载系统,解决汽车发动机过程中因起动电流大而对汽车电源的冲击影响,延长了电瓶寿命。 Abstract: When the automotive engine is started, the engine start motor and flywheel gear may be damaged, even traffic accidents and personal safeties may be caused by wrong operation or other factors.In order to ensure the automotive engine can be started normally and safely,it is necessary that the protecting measures and methods are considered in the automotive electrical control system.This paper introduces a kind of the automotive engine starting protect controller based on NXP P89LPC901 MCU.The controller can protect the engine starting process by detecting the starter key switch,transmission stall and engine speed.Through the use of close and open load system,the controller can solve the impact on automotive power because of the high-current load in the process of the automobile engine starting, and extend battery life.
上传时间: 2013-10-15
上传用户:mikesering