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param: add param_get_system_default_value

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Beat Küng 2021-03-12 09:43:27 +01:00 committed by Lorenz Meier
parent c356181f90
commit b512a3d8f7
2 changed files with 40 additions and 3 deletions
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15
src/lib/parameters/param.h
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@ -215,13 +215,22 @@ __EXPORT size_t param_size(param_t param);
__EXPORT int param_get(param_t param, void *val);
/**
* Copy the default value of a parameter.
* Copy the (airframe-specific) default value of a parameter.
*
* @param param A handle returned by param_find or passed by param_foreach.
* @param val Where to return the value, assumed to point to suitable storage for the parameter type.
* @param default_val Where to return the value, assumed to point to suitable storage for the parameter type.
* @return Zero if the parameter's deafult value could be returned, nonzero otherwise.
*/
__EXPORT int param_get_default_value(param_t param, void *val);
__EXPORT int param_get_default_value(param_t param, void *default_val);
/**
* Copy the system-wide default value of a parameter.
*
* @param param A handle returned by param_find or passed by param_foreach.
* @param default_val Where to return the value, assumed to point to suitable storage for the parameter type.
* @return Zero if the parameter's deafult value could be returned, nonzero otherwise.
*/
__EXPORT int param_get_system_default_value(param_t param, void *default_val);
/**
* Set the value of a parameter.

28
src/lib/parameters/parameters.cpp
View File

@ -617,6 +617,34 @@ bool param_value_is_default(param_t param)
return false;
}
int
param_get_system_default_value(param_t param, void *default_val)
{
if (!handle_in_range(param)) {
return PX4_ERROR;
}
int ret = PX4_OK;
param_lock_reader();
switch (param_type(param)) {
case PARAM_TYPE_INT32:
memcpy(default_val, &px4::parameters[param].val.i, param_size(param));
break;
case PARAM_TYPE_FLOAT:
memcpy(default_val, &px4::parameters[param].val.f, param_size(param));
break;
default:
ret = PX4_ERROR;
break;
}
param_unlock_reader();
return ret;
}
/**
* worker callback method to save the parameters
* @param arg unused