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polling

輪詢（polling）是一種CPU決策如何提供周邊設備服務的方式，又稱“程控輸入輸出”（Programmed I/O）。輪詢法的概念是：由CPU定時發出詢問，依序詢問每一個周邊設備是否需要其服務，有即給予服務，服務結束后再問下一個周邊，接著不斷周而復始。

  • Introduction to GPS ToolKit Pro 1.0 GPS ToolKit Pro is an ActiveX object that makes it easy to add

    Introduction to GPS ToolKit Pro 1.0 GPS ToolKit Pro is an ActiveX object that makes it easy to add GPS support to any Visual Basic, Visual C++, Delphi, Excel, or scripting project that supports ActiveX controls. GPS data (including lat/lon, speed, course, altitude, and dozens of other datasets) can be accessed through GPS ToolKit s properties, and GPS ToolKit s multithreaded event-based architecture notifies your application when data has been updated, saving you from having to write messy polling routines.

    標簽： ToolKit Introduction GPS Pro

    上傳時間： 2015-04-28

    上傳用戶：zhuoying119

  • upsd_flash.c These functions are provided to help you develop your initial code. They are optim

    upsd_flash.c These functions are provided to help you develop your initial code. They are optimized for speed rather that size. As a result, you will see very few nested function calls. If speed is not critical, you can use function calls for common tasks (like dat polling after writing a byte to Flash) The penalty is the extra processor time to make the nested calls.

    標簽： upsd_flash functions are provided

    上傳時間： 2013-12-23

    上傳用戶：Andy123456

  • This example provides a description of how to set a communication with the bxCAN in loopback mode:

    This example provides a description of how to set a communication with the bxCAN in loopback mode: - transmit and receive a standard data frame by polling at 100Kbit/S - transmit and receive an extended data frame with interrupt at 500Kbit/S - lit some LEDs depending of the program succeed or not

    標簽： communication description provides loopback

    上傳時間： 2016-04-24

    上傳用戶：frank1234

  • Name Function --- --- --- --- --- --- Check_SST_39VF160 Check manufacturer and device ID CFI_Que

    Name Function --- --- --- --- --- --- Check_SST_39VF160 Check manufacturer and device ID CFI_Query CFI Query Entry/Exit command sequence Erase_Entire_Chip Erase the contents of the entire chip Erase_One_Sector Erase a sector of 2048 word Erase_One_Block Erase a block of 32K word Program_One_Word Alter data in one word Program_One_Sector Alter data in 2048 word sector Program_One_Block Alter data in 32K word block Check_Toggle_Ready End of internal program or erase detection using Toggle bit Check_Data_polling End of internal program or erase detection using Data# polling

    標簽： manufacturer Check_SST Function CFI_Que

    上傳時間： 2013-12-21

    上傳用戶：徐孺

  • SX1278擴頻技術433M無線模塊

    APC340是高度集成低功耗雙工無線數據傳輸模塊，其嵌入高速低功耗單片機和高性能擴頻射頻芯片SX1276/8，同時采用高效的循環交織糾檢錯編碼，抗干擾和靈敏度均處于行業最領先水平，APC340提供了多個頻道選擇，可在線修改串口速率，收發頻率，發射功率，射頻速率等各種參數。APC340工作電壓為2.1-3.6V，可定制3.5-5.5V工作電壓，在接收狀態下僅消耗13mA，APC340有四種工作模式，各模式之間可任意切換，在1SEC周期輪詢喚醒省電模式（polling mode）F，接收僅僅消耗幾+uA，一節3.6V/3.6AH時的鋰亞電池可工作數年，非常適合電池供電的系統。應用：無線水氣熱表抄表極遠距離數據通訊無線傳感器網絡無線自動化數據采集野外數據遙控、遙測各種變送器，流量計智能儀表樓宇小區自動化與安防礦山石油設備控制通訊環境、節能、溫度監測電氣電力設備

    標簽： sx1278 擴頻技術 無線模塊

    上傳時間： 2022-06-19

    上傳用戶：

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