Add plugin to set params #585
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This is a refactoring which enables better type checking for parameters. The main change is that the type now needs to be passed to set_param which means the user of the API needs to know the type of a param that should be changed beforehand. This means that the actual type checking can happen inside the MAVLinkParameters class for both params that are set and params that are gotten.
Since the parameter interface has been refactored a bit, we now need to pass on the parameter type from the xml definition before doing a get_param.
In the case where we don't know about a parameter from the definition file, there is no point in trying to get it from the camera anyway. This is just an error.
This plugin enables setting and getting of raw parameters.
Param names can be 16 chars at most (plus zero termination).
This changes the bool indicating success to an enum for different results indicating success or different errors.
It's more intuitive to use the actual length (without zero termination) for the define and then add +1 if required. It turns out that when doing `strcmp`, we shouldn't compare 17 chars, so including the zero termination but only 16 chars.
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JonasVautherin
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Nov 14, 2018
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How did you test PARAM_EXT? I didn't think anything other than QGC and Camera Manager used them. |
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And just For my information, is the message flow for PARAM_EXT-* the same as for the normal param protocol (though obviously with the new messages)? |
Yuneec E90 😄
It's pretty much the same except that you also have the ack/nack that you can return. @dogmaphobic would know the details. |
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This adds a plugin to set/get "raw" mavlink params.
This has been tested against the E90.
When setting int parameters, we get an error but the param change still works. Hopefully, this will be fixed on the Firmware side: PX4/PX4-Autopilot#10792