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From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
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为了更改NI-845x上的片选信号,您需要使用脚本API.脚本API提高了片选信号线的手动控制接口,所以在总线通信前可以置高或者置底,之后返回到空闲状态。
注:请在您程序的开始包含NI-845x SPI Script CS Low.vi以确保高有效功能可以实现。这是由于片选信号初始化值为高,这是在NI-845x 一系列初始化VI 将片选信号置低后纠正过来的:SPI Create Script Reference.vi, NI-845x SPI Script Clock Polarity Phas.vi, NI-845x SPI Script Clock Rate.vi, and NI-845x SPI Script Enable SPI.vi。你需要为每一个与您器件通讯的SPI片选信号进行设置。(参考相关链接中的知识库 4TDI3A8I)
这个脚本API VIs在NI-845x»SPI高级选板上。
可以下载附件文件可以查看一个完整的范例。
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