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AP_Param: added count_parameters() API

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this auto-clears when an ENABLE parameter changes
This commit is contained in:
Andrew Tridgell 2016-01-06 14:41:07 +11:00
parent ff8008d81a
commit 93f0707679
2 changed files with 31 additions and 0 deletions
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27
libraries/AP_Param/AP_Param.cpp
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@ -67,6 +67,9 @@ extern const AP_HAL::HAL &hal;
// number of rows in the _var_info[] table
uint16_t AP_Param::_num_vars;
// cached parameter count
uint16_t AP_Param::_parameter_count;
// storage and naming information about all types that can be saved
const AP_Param::Info *AP_Param::_var_info;
@ -823,6 +826,11 @@ bool AP_Param::save(bool force_save)
ap = (const AP_Param *)((ptrdiff_t)ap) - (idx*sizeof(float));
}
if (phdr.type == AP_PARAM_INT8 && ginfo != nullptr && (ginfo->flags & AP_PARAM_FLAG_ENABLE)) {
// clear cached parameter count
_parameter_count = 0;
}
char name[AP_MAX_NAME_SIZE+1];
copy_name_info(info, ginfo, ginfo0, idx, name, sizeof(name), true);
@ -1656,3 +1664,22 @@ void AP_Param::send_parameter(char *name, enum ap_var_type param_header_type) co
name_axis = 'Z';
GCS_MAVLINK::send_parameter_value_all(name, AP_PARAM_FLOAT, v->z);
}
/*
return count of all scalar parameters
*/
uint16_t AP_Param::count_parameters(void)
{
// if we haven't cached the parameter count yet...
if (0 == _parameter_count) {
AP_Param *vp;
AP_Param::ParamToken token;
vp = AP_Param::first(&token, NULL);
do {
_parameter_count++;
} while (NULL != (vp = AP_Param::next_scalar(&token, NULL)));
}
return _parameter_count;
}

4
libraries/AP_Param/AP_Param.h
View File

@ -313,6 +313,9 @@ public:
// return true if the parameter is configured
bool configured(void) { return configured_in_defaults_file() || configured_in_storage(); }
// count of parameters in tree
static uint16_t count_parameters(void);
private:
/// EEPROM header
///
@ -439,6 +442,7 @@ private:
static StorageAccess _storage;
static uint16_t _num_vars;
static uint16_t _parameter_count;
static const struct Info * _var_info;
/*