针对大数据量的串口间通信,在常规的UART串行数据通信的基础上,结合Cortex-M3微控制器中DMA控制器的作用,实现DMA控制的UART串口数据包收发。设计链表项缓存,最终实现DMA的分散/聚集模式的数据传输过程,主要是发送过程。提高了串行数据通信过程的MCU独立性和MCU利用的效率。
上传时间: 2013-11-04
上传用户:gaome
USB转串口驱动程序
上传时间: 2013-11-06
上传用户:1421706030
USB转TTL原理图 PL2303
上传时间: 2013-10-31
上传用户:13162218709
USB2I2C是一个USB总线的转I2C总线的专用接口芯片。通过USB2I2C芯片用户可以非常方便地实现PC机USB总线和下位机端各种I2C/IIC设备(如,ATMEL公司的AT24CXX系列EEPROM;I2C总线8位并行IO口扩展芯片PCF8574/JLC1562;I2C接口实时时钟芯片DS1307/PCF8563/SD2000D/M41T80/ME901/ISL1208/;I2C数据采集ADC芯片MCP3221(12bitADC)/ADS1100(16bitADC)/ADS1112(16bitADC)/MAX1238(12bitADC)/MAX1239(12bitADC);I2C接口数模转换DAC芯片DAC5574(8bitDAC)/DAC6573(10bitDAC)/DAC8571 (16bitDAC)/;I2C接口温度传感器TMP101/TMP275/DS1621/MAX6625,等)之间的通信。 USB2I2C芯片上位机PC端提供简单易用的USBIOX.DLL动态库调用,可以方便地被VB,VC,Delphi等上位机开发工具调用
上传时间: 2014-12-26
上传用户:Amygdala
单片机接口必须的
上传时间: 2013-11-20
上传用户:非洲之星
USB接口定义
上传时间: 2014-12-26
上传用户:归海惜雪
PC与单片机数据采集系统的USB通讯设计论文
上传时间: 2013-10-30
上传用户:hanli8870
HIGH SPEED 8051 μC CORE - Pipe-lined Instruction Architecture; Executes 70% of Instructions in 1 or 2 System Clocks - Up to 25MIPS Throughput with 25MHz System Clock - 22 Vectored Interrupt Sources MEMORY - 4352 Bytes Internal Data RAM (256 + 4k) - 64k Bytes In-System Programmable FLASH Program Memory - External Parallel Data Memory Interface – up to 5Mbytes/sec DIGITAL PERIPHERALS - 64 Port I/O; All are 5V tolerant - Hardware SMBusTM (I2CTM Compatible), SPITM, and Two UART Serial Ports Available Concurrently - Programmable 16-bit Counter/Timer Array with 5 Capture/Compare Modules - 5 General Purpose 16-bit Counter/Timers - Dedicated Watch-Dog Timer; Bi-directional Reset CLOCK SOURCES - Internal Programmable Oscillator: 2-to-16MHz - External Oscillator: Crystal, RC, C, or Clock - Real-Time Clock Mode using Timer 3 or PCA SUPPLY VOLTAGE ........................ 2.7V to 3.6V - Typical Operating Current: 10mA @ 25MHz - Multiple Power Saving Sleep and Shutdown Modes 100-Pin TQFP (64-Pin Version Available) Temperature Range: –40°C to +85°C
标签: C8051F020
上传时间: 2013-10-12
上传用户:lalalal
The MAX9257/MAX9258 programmable serializer/deserializer (SerDes) devices transfer both video data and control signals over the same twisted-pair cable. However, control data can only be transmitted during the vertical blank time, which is indicated by the control-channel-enabled output (CCEN) signal. The electronic control unit (ECU) firmware designer needs to know how quickly to respond to the CCEN signal before it times out and how to calculate this duration. This application note describes how to calculate the duration of the CCEN for the MAX9257/MAX9258 SerDes chipset. The calculation is based on STO timeout, clock frequency, and UART bit timing. The CCEN duration is programmable and can be closed if not in use.
上传时间: 2014-01-24
上传用户:xingisme
固件无限升级的编程器:随着TI 公司MSP430 系列单片机新型号的不断推出,我 们对编程器的功能也随之更新到位,凡是够买过本产品的老顾客可以使用本产品最新 软件只需点击升级固件,就可以获得最新的功能了,正所谓一机在手后顾无忧。原串 口型编程器,老客户今后同样可以使用我们的最新软件获取最新的功能。不抛弃,不 放弃,有了您的支持,我们将做得更好。 PROG430 编程器(USB型)是针对美国德州仪器(TI)公司的MSP430系列Flash 型单片机的专 业编程器,由北京博通电子打造,是原有串口型编程器的升级产品。功能强大,操作方便,界面友 好,支持固件升级功能,只需下载最新的上位机软件即可更新编程器固件。
上传时间: 2013-11-09
上传用户:wsf950131