英文:
How to create a parameter output like a slider does from a c++ OOT block?
问题
我想计算调谐频率而不使用滑块。我如何配置一个用C++编写的OOT，使其具有类似QT GUI范围块的参数输出？
英文:
I would like to compute the tune-to frequency rather than use a slider. How do I configure an OOT (written in c++) to have a parameter output like the QT GUI Range block?
答案1
得分: 0
"Parameters" 是一个在GNU Radio 中不存在的概念，它仅存在于GNU Radio Companion (GRC) 生成的Python流图中。
相反，你可以使用一个具有消息端口输出的块，然后在该输出上发出一个包含指示调谐到正确频率的字典的消息。然后，将该消息块连接到你正在使用的硬件接口块（例如UHD USRP Source或Soapy Source）的消息输入。
英文:
You can't.
"Parameters" are a concept that doesn't exist in GNU Radio – it only exists in the Python flowgraphs that GRC generates.
Instead, you would simply have a block with a message port output, and on that output, you'd emit a message containing a dictionary that contains the instruction to tune to the right frequency. You'd then connect that message block to the message input of whatever Hardware-interfacing block (UHD USRP Source? Soapy Source?) you're using.
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