clear_serialT_clear_serialClearSerialClearSerialclear_serial (算子名称)

名称

clear_serialT_clear_serialClearSerialClearSerialclear_serial — Clear the buffer of a serial connection.

参数签名

描述

clear_serialclear_serialClearSerialClearSerialClearSerialclear_serial discards data written to the serial device referred to by SerialHandleSerialHandleSerialHandleSerialHandleserialHandleserial_handle, but not transmitted (ChannelChannelChannelChannelchannelchannel = 'output'"output""output""output""output""output"), or data received, but not read (ChannelChannelChannelChannelchannelchannel = 'input'"input""input""input""input""input"), or performs both these operations at once (ChannelChannelChannelChannelchannelchannel = 'in_out'"in_out""in_out""in_out""in_out""in_out").

运行信息

• 多线程类型:可重入(与非独占操作符并行运行)。
• 多线程作用域:全局(可以从任何线程调用)。
• 未经并行化处理。

This operator modifies the state of the following input parameter:

• SerialHandleSerialHandleSerialHandleSerialHandleserialHandleserial_handle

During execution of this operator, access to the value of this parameter must be synchronized if it is used across multiple threads.

参数表

结果

If the parameters are correct and the buffers of the serial device could be cleared, 该算子 clear_serialclear_serialClearSerialClearSerialClearSerialclear_serial returns the value 2 ( H_MSG_TRUE) . Otherwise an exception is raised.

可能的前置算子

open_serialopen_serialOpenSerialOpenSerialOpenSerialopen_serial

可能的后置算子

read_serialread_serialReadSerialReadSerialReadSerialread_serial, write_serialwrite_serialWriteSerialWriteSerialWriteSerialwrite_serial

参考其它

read_serialread_serialReadSerialReadSerialReadSerialread_serial

模块

Foundation