針對大數據量的串口間通信,在常規的UART串行數據通信的基礎上,結合Cortex-M3微控制器中DMA控制器的作用,實現DMA控制的UART串口數據包收發。設計鏈表項緩存,最終實現DMA的分散/聚集模式的數據傳輸過程,主要是發送過程。提高了串行數據通信過程的MCU獨立性和MCU利用的效率。
上傳時間: 2013-11-04
上傳用戶:gaome
USB轉串口驅動程序
上傳時間: 2013-11-06
上傳用戶:1421706030
USB轉TTL原理圖 PL2303
上傳時間: 2013-10-31
上傳用戶:13162218709
USB2I2C是一個USB總線的轉I2C總線的專用接口芯片。通過USB2I2C芯片用戶可以非常方便地實現PC機USB總線和下位機端各種I2C/IIC設備(如,ATMEL公司的AT24CXX系列EEPROM;I2C總線8位并行IO口擴展芯片PCF8574/JLC1562;I2C接口實時時鐘芯片DS1307/PCF8563/SD2000D/M41T80/ME901/ISL1208/;I2C數據采集ADC芯片MCP3221(12bitADC)/ADS1100(16bitADC)/ADS1112(16bitADC)/MAX1238(12bitADC)/MAX1239(12bitADC);I2C接口數模轉換DAC芯片DAC5574(8bitDAC)/DAC6573(10bitDAC)/DAC8571 (16bitDAC)/;I2C接口溫度傳感器TMP101/TMP275/DS1621/MAX6625,等)之間的通信。 USB2I2C芯片上位機PC端提供簡單易用的USBIOX.DLL動態庫調用,可以方便地被VB,VC,Delphi等上位機開發工具調用
上傳時間: 2014-12-26
上傳用戶:Amygdala
單片機接口必須的
上傳時間: 2013-11-20
上傳用戶:非洲之星
USB接口定義
上傳時間: 2014-12-26
上傳用戶:歸海惜雪
PC與單片機數據采集系統的USB通訊設計論文
上傳時間: 2013-10-30
上傳用戶: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
標簽: C8051F020
上傳時間: 2013-10-12
上傳用戶: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.
上傳時間: 2014-01-24
上傳用戶:xingisme
固件無限升級的編程器:隨著TI 公司MSP430 系列單片機新型號的不斷推出,我 們對編程器的功能也隨之更新到位,凡是夠買過本產品的老顧客可以使用本產品最新 軟件只需點擊升級固件,就可以獲得最新的功能了,正所謂一機在手后顧無憂。原串 口型編程器,老客戶今后同樣可以使用我們的最新軟件獲取最新的功能。不拋棄,不 放棄,有了您的支持,我們將做得更好。 PROG430 編程器(USB型)是針對美國德州儀器(TI)公司的MSP430系列Flash 型單片機的專 業編程器,由北京博通電子打造,是原有串口型編程器的升級產品。功能強大,操作方便,界面友 好,支持固件升級功能,只需下載最新的上位機軟件即可更新編程器固件。
上傳時間: 2013-11-09
上傳用戶:wsf950131