// Save the variable to EEPROM, if supported
//
bool AP_Param::save(bool force_save)
{
uint32_t group_element = 0;
const struct GroupInfo *ginfo;
uint8_t idx;
const struct AP_Param::Info *info = find_var_info(&group_element, &ginfo, &idx);
const AP_Param *ap;
if (info == NULL) {
// we don't have any info on how to store it
return false;
}
struct Param_header phdr;
// create the header we will use to store the variable
if (ginfo != NULL) {
phdr.type = PGM_UINT8(&ginfo->type);
} else {
phdr.type = PGM_UINT8(&info->type);
}
phdr.key = PGM_UINT8(&info->key);
phdr.group_element = group_element;
ap = this;
if (phdr.type != AP_PARAM_VECTOR3F && idx != 0) {
// only vector3f can have non-zero idx for now
return false;
}
if (idx != 0) {
ap = (const AP_Param *)((uintptr_t)ap) - (idx*sizeof(float));
}
// scan EEPROM to find the right location
uint16_t ofs;
if (scan(&phdr, &ofs)) {
// found an existing copy of the variable
eeprom_write_check(ap, ofs+sizeof(phdr), type_size((enum ap_var_type)phdr.type));
return true;
}
if (ofs == (uint16_t) ~0) {
return false;
}
// if the value is the default value then don't save
if (phdr.type <= AP_PARAM_FLOAT) {
float v1 = cast_to_float((enum ap_var_type)phdr.type);
float v2;
if (ginfo != NULL) {
v2 = get_default_value(&ginfo->def_value);
} else {
v2 = get_default_value(&info->def_value);
}
if (is_equal(v1,v2) && !force_save) {
return true;
}
if (phdr.type != AP_PARAM_INT32 &&
(fabsf(v1-v2) < 0.0001f*fabsf(v1))) {
// for other than 32 bit integers, we accept values within
// 0.01 percent of the current value as being the same
return true;
}
}
if (ofs+type_size((enum ap_var_type)phdr.type)+2*sizeof(phdr) >= _storage.size()) {
// we are out of room for saving variables
hal.console->println_P(PSTR("EEPROM full"));
return false;
}
// write a new sentinal, then the data, then the header
write_sentinal(ofs + sizeof(phdr) + type_size((enum ap_var_type)phdr.type));
eeprom_write_check(ap, ofs+sizeof(phdr), type_size((enum ap_var_type)phdr.type));
eeprom_write_check(&phdr, ofs, sizeof(phdr));
return true;
}
bool AS_Param::save(bool force_save)
{
uint8_t idx;
const struct AS_Param::Info *info = find_var_info();
const AS_Param *ap;
if (info == NULL) {
// we don't have any info on how to store it
return false;
}
struct Param_header phdr;
phdr.type = info->type;
phdr.key = info->key;
ap = this;
if (idx != 0) {
ap = (const AS_Param *)((uintptr_t)ap) - (idx*sizeof(float));
}
// scan EEPROM to find the right location
uint16_t ofs;
if (scan(&phdr, &ofs)) {
// found an existing copy of the variable
eeprom_write_check(ap, ofs+sizeof(phdr), type_size((enum as_var_type)phdr.type));
return true;
}
if (ofs == (uint16_t) ~0) {
return false;
}
float v1 = cast_to_float((enum as_var_type)phdr.type);
float v2;
v2 = info->value;
if (v1 == v2 && !force_save) {
return true;
}
if (phdr.type != AS_PTYPE_INT32 &&
(fabs(v1-v2) < 0.0001f*fabs(v1))) {
// for other than 32 bit integers, we accept values within
// 0.01 percent of the current value as being the same
return true;
}
if (ofs+type_size((enum as_var_type)phdr.type)+2*sizeof(phdr) >= _eeprom_size) {
// we are out of room for saving variables
Serial.print("EEPROM full");
return false;
}
// write a new sentinal, then the data, then the header
write_sentinal(ofs + sizeof(phdr) + type_size((enum as_var_type)phdr.type));
eeprom_write_check(ap, ofs+sizeof(phdr), type_size((enum as_var_type)phdr.type));
eeprom_write_check(&phdr, ofs, sizeof(phdr));
Serial.print("Write param done\n");
return true;
}
