请问各位高手:问题一: 事件SetRTS(OnOff: Boolean)有什么用:
帮助中这样写:
Enables or diables RTS signal.
procedure SetRTS(OnOff: Boolean);Description
Use SetRTS function to enable or disable RTS (request-to-send) signal. OnOff parameter can be one of the following values:Value Meaning
True Sets RTS signal
False Clears RTS signalNote
If FlowControl.ControlRTS property is set to rtsHandshake, it is an error for the application to call SetRTS function and EComPort exception is raised.问题二,串口通讯中的流控制又是怎么回事:
帮助中这样写:
Sets common flow control type.type TFlowControl = (fcHardware, fcSoftware, fcNone, fcCustom);
property FlowControl: TFlowControl;Description
Set FlowControl property to set one of common flow control types (e.g. hardware, software). FlowControl property is virtual property, so its value depends on the following properties: ControlRTS, OutCTSFlow, XonXoffIn and XonXoffOut.Note
Setting FlowControl property usually changes other properties of TComFlowControl class. Also setting other properties of TComFlowControl class changes FlowControl property.
谢谢各位最后,我最近在编写串口程序,自感基础知识不够,有没有参考书推荐一下。
帮助中这样写:
Enables or diables RTS signal.
procedure SetRTS(OnOff: Boolean);Description
Use SetRTS function to enable or disable RTS (request-to-send) signal. OnOff parameter can be one of the following values:Value Meaning
True Sets RTS signal
False Clears RTS signalNote
If FlowControl.ControlRTS property is set to rtsHandshake, it is an error for the application to call SetRTS function and EComPort exception is raised.问题二,串口通讯中的流控制又是怎么回事:
帮助中这样写:
Sets common flow control type.type TFlowControl = (fcHardware, fcSoftware, fcNone, fcCustom);
property FlowControl: TFlowControl;Description
Set FlowControl property to set one of common flow control types (e.g. hardware, software). FlowControl property is virtual property, so its value depends on the following properties: ControlRTS, OutCTSFlow, XonXoffIn and XonXoffOut.Note
Setting FlowControl property usually changes other properties of TComFlowControl class. Also setting other properties of TComFlowControl class changes FlowControl property.
谢谢各位最后,我最近在编写串口程序,自感基础知识不够,有没有参考书推荐一下。
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