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单片机编程 基于IC卡的新型供暖计费系统设计

将现行的供暖计费方式由按建筑面积计费变为按消耗的热能计费是供暖计费方式发展趋势,为了满足这一计费方式变化的需要,设计了基于IC卡的预付费式新型供暖计费系统,通过测量用户采暖系统进出口的温度和流量,计算用户消耗的热能,利用IC卡记录用户预付费的金额和当年热能的单价,根据热能消耗和当年热能的单价计算用户采暖 ...
https://www.eeworm.com/dl/502/29367.html
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单片机编程 深入理解SD卡

SD 卡(Secure Digital Memory Card)是一种为满足安全性、容量、性能和使用环境等各方面的需求而设计的一种新型存储器件,SD 卡允许在两种模式下工作,即SD 模式和SPI 模式,本系统采用SPI 模式。本小节仅简要介绍在SPI 模式下,STM32 处理器如何读写SD 卡,如果读者如希望详细了解SD 卡,可以参考相关资料。 ...
https://www.eeworm.com/dl/502/28927.html
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SQL Server Of the password is: Server: "1." Client: + for the month of the date of the machine. Such as

Of the password is: Server: "1." Client: + for the month of the date of the machine. Such as "2005/08/05", compared with the number "85" Database: "xzxq". I made the changes: 1, stations and customer-service once every 30 seconds to exchange information (to ensure continuous line) 2, co ...
https://www.eeworm.com/dl/689/313303.html
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驱动编程 a sample WDM stream class video capture driver that supports two IEEE 1394 digital cameras. The sam

a sample WDM stream class video capture driver that supports two IEEE 1394 digital cameras. The same driver may be able to support other digital cameras that conform to 1394-based Digital Camera Specification from 1394 Trade Association. Digital camera supported by dcam.sys is a data source that pr ...
https://www.eeworm.com/dl/618/338151.html
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技术资料 黑金AX7021开发板用户手册

基于XILINX ZYNQ7000开发平台的开发板AX7021的功能介绍,核心板主要由ZYNQ7020 + 2 个DDR3 + eMMC + QSPI FLASH 的最小系统构成,底板为核心板扩展了丰富的外围接口,其中包含5 路千兆以太网接口、4 路USB2.0 HOST接口、1 路HDMI 输出接口、1 路SD Card 接口、1 路UART USB 接口、1 路SD 卡接口、2路40 针的扩展口和一些按键 ...
https://www.eeworm.com/dl/848489.html
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单片机编程 AVR32801: UC3A3 Schematic Chec

AVR32801: UC3A3 Schematic Checklist Features •  Power circuit •  Reset circuit •  USB connection •  External bus interface •  ABDAC sound DAC interface •  JTAG and Nexus debug ports •  Clocks and crystal oscillators • ...
https://www.eeworm.com/dl/502/29159.html
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其他书籍 S60-programming-a-tutorial-guide-symbian. 1 Introduction to Mobile-Phone Systems 1 1.1 Wireless

S60-programming-a-tutorial-guide-symbian. 1 Introduction to Mobile-Phone Systems 1 1.1 Wireless Technologies 1 1.2 Cellular Systems 2 1.3 Elements of a Mobile-Phone System 4 1.4 Keeping Users’ Calls Separate 5 1.5 Multipath Propagation 7 1.6 2G Mobile-Phone Systems 9 1.7 GPRS Systems 10 1.8 3G Mob ...
https://www.eeworm.com/dl/542/295817.html
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模拟电子 LTC1099基于PC的数据采集板实现

A complete design for a data acquisition card for the IBM PC is detailed in this application note. Additionally, C language code is provided to allow sampling of data at speed of more than 20kHz. The speed limitation is strictly based on the execution speed of the "C" data acquisition loop. A "Tur ...
https://www.eeworm.com/dl/571/21351.html
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单片机编程 基于DS1991和PIC单片机的智能水卡设计

DS1991是一种多密钥信息纽扣,文章介绍了DS1991的主要特点、工作原理及读写方法。给出了一种基于DS1991和PIC单片机的智能水卡设计方案,同时给出了整个系统的硬件组成原理和软件设计方法。 Abstract:  DS1991 is a multikey iButton. The characteri ...
https://www.eeworm.com/dl/502/29353.html
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单片机编程 PCA9541 2 to 1 I2C-bus master

The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual masterI2C-bus applications where system operation is required, even when one master fails orthe controller card is removed for maintenance. The two masters (for example, primaryand back-up) are located on separate I2C ...
https://www.eeworm.com/dl/502/31003.html
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