bool
MavlinkParametersManager::send_uavcan()
{
/* Send parameter values received from the UAVCAN topic */
if (_uavcan_parameter_value_sub < 0) {
_uavcan_parameter_value_sub = orb_subscribe(ORB_ID(uavcan_parameter_value));
}
bool param_value_ready;
orb_check(_uavcan_parameter_value_sub, ¶m_value_ready);
if (param_value_ready) {
struct uavcan_parameter_value_s value;
orb_copy(ORB_ID(uavcan_parameter_value), _uavcan_parameter_value_sub, &value);
// Check if we received a matching parameter, drop it from the list and request the next
if (value.param_index == _uavcan_open_request_list->req.param_index
&& value.node_id == _uavcan_open_request_list->req.node_id) {
dequeue_uavcan_request();
request_next_uavcan_parameter();
}
mavlink_param_value_t msg;
msg.param_count = value.param_count;
msg.param_index = value.param_index;
/*
* coverity[buffer_size_warning : FALSE]
*
* The MAVLink spec does not require the string to be NUL-terminated if it
* has length 16. In this case the receiving end needs to terminate it
* when copying it.
*/
strncpy(msg.param_id, value.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
if (value.param_type == MAV_PARAM_TYPE_REAL32) {
msg.param_type = MAVLINK_TYPE_FLOAT;
msg.param_value = value.real_value;
} else {
int32_t val;
val = (int32_t)value.int_value;
memcpy(&msg.param_value, &val, sizeof(int32_t));
msg.param_type = MAVLINK_TYPE_INT32_T;
}
// Re-pack the message with the UAVCAN node ID
mavlink_message_t mavlink_packet;
mavlink_msg_param_value_encode_chan(mavlink_system.sysid, value.node_id, _mavlink->get_channel(), &mavlink_packet,
&msg);
_mavlink_resend_uart(_mavlink->get_channel(), &mavlink_packet);
return true;
}
return false;
}
void
MavlinkParametersManager::handle_message(const mavlink_message_t *msg)
{
switch (msg->msgid) {
case MAVLINK_MSG_ID_PARAM_REQUEST_LIST: {
/* request all parameters */
mavlink_param_request_list_t req_list;
mavlink_msg_param_request_list_decode(msg, &req_list);
if (req_list.target_system == mavlink_system.sysid &&
(req_list.target_component == mavlink_system.compid || req_list.target_component == MAV_COMP_ID_ALL)) {
if (_send_all_index < 0) {
_send_all_index = PARAM_HASH;
} else {
/* a restart should skip the hash check on the ground */
_send_all_index = 0;
}
}
if (req_list.target_system == mavlink_system.sysid && req_list.target_component < 127 &&
(req_list.target_component != mavlink_system.compid || req_list.target_component == MAV_COMP_ID_ALL)) {
// publish list request to UAVCAN driver via uORB.
uavcan_parameter_request_s req;
req.message_type = msg->msgid;
req.node_id = req_list.target_component;
req.param_index = 0;
if (_uavcan_parameter_request_pub == nullptr) {
_uavcan_parameter_request_pub = orb_advertise(ORB_ID(uavcan_parameter_request), &req);
} else {
orb_publish(ORB_ID(uavcan_parameter_request), _uavcan_parameter_request_pub, &req);
}
}
break;
}
case MAVLINK_MSG_ID_PARAM_SET: {
/* set parameter */
mavlink_param_set_t set;
mavlink_msg_param_set_decode(msg, &set);
if (set.target_system == mavlink_system.sysid &&
(set.target_component == mavlink_system.compid || set.target_component == MAV_COMP_ID_ALL)) {
/* local name buffer to enforce null-terminated string */
char name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1];
strncpy(name, set.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
/* enforce null termination */
name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
/* Whatever the value is, we're being told to stop sending */
if (strncmp(name, "_HASH_CHECK", sizeof(name)) == 0) {
_send_all_index = -1;
/* No other action taken, return */
return;
}
/* attempt to find parameter, set and send it */
param_t param = param_find_no_notification(name);
if (param == PARAM_INVALID) {
char buf[MAVLINK_MSG_STATUSTEXT_FIELD_TEXT_LEN];
sprintf(buf, "[pm] unknown param: %s", name);
_mavlink->send_statustext_info(buf);
} else {
// Load current value before setting it
float curr_val;
param_get(param, &curr_val);
param_set(param, &(set.param_value));
// Check if the parameter changed. If it didn't change, send current value back
if (!(fabsf(curr_val - set.param_value) > 0.0f)) {
send_param(param);
}
}
}
if (set.target_system == mavlink_system.sysid && set.target_component < 127 &&
(set.target_component != mavlink_system.compid || set.target_component == MAV_COMP_ID_ALL)) {
// publish set request to UAVCAN driver via uORB.
uavcan_parameter_request_s req;
req.message_type = msg->msgid;
req.node_id = set.target_component;
req.param_index = -1;
strncpy(req.param_id, set.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1);
req.param_id[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
if (set.param_type == MAV_PARAM_TYPE_REAL32) {
req.param_type = MAV_PARAM_TYPE_REAL32;
req.real_value = set.param_value;
} else {
int32_t val;
memcpy(&val, &set.param_value, sizeof(int32_t));
req.param_type = MAV_PARAM_TYPE_INT64;
req.int_value = val;
}
if (_uavcan_parameter_request_pub == nullptr) {
_uavcan_parameter_request_pub = orb_advertise(ORB_ID(uavcan_parameter_request), &req);
} else {
orb_publish(ORB_ID(uavcan_parameter_request), _uavcan_parameter_request_pub, &req);
}
}
break;
}
case MAVLINK_MSG_ID_PARAM_REQUEST_READ: {
/* request one parameter */
mavlink_param_request_read_t req_read;
mavlink_msg_param_request_read_decode(msg, &req_read);
if (req_read.target_system == mavlink_system.sysid &&
(req_read.target_component == mavlink_system.compid || req_read.target_component == MAV_COMP_ID_ALL)) {
/* when no index is given, loop through string ids and compare them */
if (req_read.param_index < 0) {
/* XXX: I left this in so older versions of QGC wouldn't break */
if (strncmp(req_read.param_id, HASH_PARAM, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN) == 0) {
/* return hash check for cached params */
uint32_t hash = param_hash_check();
/* build the one-off response message */
mavlink_param_value_t param_value;
param_value.param_count = param_count_used();
param_value.param_index = -1;
strncpy(param_value.param_id, HASH_PARAM, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
param_value.param_type = MAV_PARAM_TYPE_UINT32;
memcpy(¶m_value.param_value, &hash, sizeof(hash));
mavlink_msg_param_value_send_struct(_mavlink->get_channel(), ¶m_value);
} else {
/* local name buffer to enforce null-terminated string */
char name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1];
strncpy(name, req_read.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
/* enforce null termination */
name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
/* attempt to find parameter and send it */
send_param(param_find_no_notification(name));
}
} else {
/* when index is >= 0, send this parameter again */
int ret = send_param(param_for_used_index(req_read.param_index));
if (ret == 1) {
char buf[MAVLINK_MSG_STATUSTEXT_FIELD_TEXT_LEN];
sprintf(buf, "[pm] unknown param ID: %u", req_read.param_index);
_mavlink->send_statustext_info(buf);
} else if (ret == 2) {
char buf[MAVLINK_MSG_STATUSTEXT_FIELD_TEXT_LEN];
sprintf(buf, "[pm] failed loading param from storage ID: %u", req_read.param_index);
_mavlink->send_statustext_info(buf);
}
}
}
if (req_read.target_system == mavlink_system.sysid && req_read.target_component < 127 &&
(req_read.target_component != mavlink_system.compid || req_read.target_component == MAV_COMP_ID_ALL)) {
// publish set request to UAVCAN driver via uORB.
uavcan_parameter_request_s req = {};
req.timestamp = hrt_absolute_time();
req.message_type = msg->msgid;
req.node_id = req_read.target_component;
req.param_index = req_read.param_index;
strncpy(req.param_id, req_read.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1);
req.param_id[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
// Enque the request and forward the first to the uavcan node
enque_uavcan_request(&req);
request_next_uavcan_parameter();
}
break;
}
case MAVLINK_MSG_ID_PARAM_MAP_RC: {
/* map a rc channel to a parameter */
mavlink_param_map_rc_t map_rc;
mavlink_msg_param_map_rc_decode(msg, &map_rc);
if (map_rc.target_system == mavlink_system.sysid &&
(map_rc.target_component == mavlink_system.compid ||
map_rc.target_component == MAV_COMP_ID_ALL)) {
/* Copy values from msg to uorb using the parameter_rc_channel_index as index */
size_t i = map_rc.parameter_rc_channel_index;
_rc_param_map.param_index[i] = map_rc.param_index;
strncpy(&(_rc_param_map.param_id[i * (rc_parameter_map_s::PARAM_ID_LEN + 1)]), map_rc.param_id,
MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
/* enforce null termination */
_rc_param_map.param_id[i * (rc_parameter_map_s::PARAM_ID_LEN + 1) + rc_parameter_map_s::PARAM_ID_LEN] = '\0';
_rc_param_map.scale[i] = map_rc.scale;
_rc_param_map.value0[i] = map_rc.param_value0;
_rc_param_map.value_min[i] = map_rc.param_value_min;
_rc_param_map.value_max[i] = map_rc.param_value_max;
if (map_rc.param_index == -2) { // -2 means unset map
_rc_param_map.valid[i] = false;
} else {
_rc_param_map.valid[i] = true;
}
_rc_param_map.timestamp = hrt_absolute_time();
if (_rc_param_map_pub == nullptr) {
_rc_param_map_pub = orb_advertise(ORB_ID(rc_parameter_map), &_rc_param_map);
} else {
orb_publish(ORB_ID(rc_parameter_map), _rc_param_map_pub, &_rc_param_map);
}
}
break;
}
default:
break;
}
}
