AP_UAVCAN: setup uavcan server with internal storage

This commit is contained in:
Siddharth Purohit 2019-09-21 11:16:06 +08:00 committed by Andrew Tridgell
parent 9d1c6ae46e
commit 9bd379e236
6 changed files with 811 additions and 355 deletions

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@ -49,6 +49,7 @@
#include <SRV_Channel/SRV_Channel.h> #include <SRV_Channel/SRV_Channel.h>
#include <AP_OpticalFlow/AP_OpticalFlow_HereFlow.h> #include <AP_OpticalFlow/AP_OpticalFlow_HereFlow.h>
#include <AP_ADSB/AP_ADSB.h> #include <AP_ADSB/AP_ADSB.h>
#include "AP_UAVCAN_Server.h"
#define LED_DELAY_US 50000 #define LED_DELAY_US 50000
@ -204,7 +205,12 @@ void AP_UAVCAN::init(uint8_t driver_index, bool enable_filters)
uint8_t uid_len = uid_buf_len; uint8_t uid_len = uid_buf_len;
uint8_t unique_id[uid_buf_len]; uint8_t unique_id[uid_buf_len];
if (hal.util->get_system_id_unformatted(unique_id, uid_len)) { if (hal.util->get_system_id_unformatted(unique_id, uid_len)) {
//This is because we are maintaining a common Server Record for all UAVCAN Instances.
//In case the node IDs are different, and unique id same, it will create
//conflict in the Server Record.
unique_id[uid_len - 1] += _uavcan_node;
uavcan::copy(unique_id, unique_id + uid_len, hw_version.unique_id.begin()); uavcan::copy(unique_id, unique_id + uid_len, hw_version.unique_id.begin());
} }
_node->setHardwareVersion(hw_version); _node->setHardwareVersion(hw_version);
@ -216,10 +222,13 @@ void AP_UAVCAN::init(uint8_t driver_index, bool enable_filters)
} }
//Start Servers //Start Servers
#ifdef HAS_UAVCAN_SERVERS if (!AP::uavcan_server().init(this)) {
_servers.init(*_node); debug_uavcan(1, "UAVCAN: Failed to start DNA Server\n\r");
#endif return;
}
// Roundup all subscribers from supported drivers // Roundup all subscribers from supported drivers
AP_UAVCAN_Server::subscribe_msgs(this);
AP_GPS_UAVCAN::subscribe_msgs(this); AP_GPS_UAVCAN::subscribe_msgs(this);
AP_Compass_UAVCAN::subscribe_msgs(this); AP_Compass_UAVCAN::subscribe_msgs(this);
AP_Baro_UAVCAN::subscribe_msgs(this); AP_Baro_UAVCAN::subscribe_msgs(this);
@ -329,6 +338,7 @@ void AP_UAVCAN::loop(void)
led_out_send(); led_out_send();
buzzer_send(); buzzer_send();
safety_state_send(); safety_state_send();
AP::uavcan_server().verify_nodes(this);
} }
} }

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@ -18,13 +18,13 @@
#define AP_UAVCAN_H_ #define AP_UAVCAN_H_
#include <uavcan/uavcan.hpp> #include <uavcan/uavcan.hpp>
#include "AP_UAVCAN_Server.h"
#include <AP_HAL/CAN.h> #include <AP_HAL/CAN.h>
#include <AP_HAL/Semaphores.h> #include <AP_HAL/Semaphores.h>
#include <AP_Param/AP_Param.h> #include <AP_Param/AP_Param.h>
#include <uavcan/helpers/heap_based_pool_allocator.hpp> #include <uavcan/helpers/heap_based_pool_allocator.hpp>
#include "AP_UAVCAN_Servers.h"
#ifndef UAVCAN_NODE_POOL_SIZE #ifndef UAVCAN_NODE_POOL_SIZE
#define UAVCAN_NODE_POOL_SIZE 8192 #define UAVCAN_NODE_POOL_SIZE 8192
@ -172,10 +172,6 @@ private:
uint8_t _driver_index; uint8_t _driver_index;
char _thread_name[9]; char _thread_name[9];
bool _initialized; bool _initialized;
#ifdef HAS_UAVCAN_SERVERS
AP_UAVCAN_Servers _servers;
#endif
///// SRV output ///// ///// SRV output /////
struct { struct {
uint16_t pulse; uint16_t pulse;

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@ -0,0 +1,673 @@
/*
* This file is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Siddharth Bharat Purohit
*/
#include <AP_HAL/AP_HAL.h>
#if HAL_WITH_UAVCAN
#include "AP_UAVCAN_Server.h"
#include "AP_UAVCAN.h"
#include <StorageManager/StorageManager.h>
#include <AP_HAL/AP_HAL.h>
#include <AP_Math/AP_Math.h>
#include <uavcan/protocol/dynamic_node_id/Allocation.hpp>
#include <GCS_MAVLink/GCS.h>
extern const AP_HAL::HAL& hal;
#define NODEDATA_MAGIC 0xAC01
#define NODEDATA_MAGIC_LEN 2
#define MAX_NODE_ID 125
#define debug_uavcan(fmt, args...) do { hal.console->printf(fmt, ##args); } while (0)
//Callback Object Definitions
UC_REGISTRY_BINDER(AllocationCb, uavcan::protocol::dynamic_node_id::Allocation);
UC_REGISTRY_BINDER(NodeStatusCb, uavcan::protocol::NodeStatus);
static void trampoline_handleNodeInfo(const uavcan::ServiceCallResult<uavcan::protocol::GetNodeInfo>& resp);
static void trampoline_handleAllocation(AP_UAVCAN* ap_uavcan, uint8_t node_id, const AllocationCb &cb);
static void trampoline_handleNodeStatus(AP_UAVCAN* ap_uavcan, uint8_t node_id, const NodeStatusCb &cb);
static uavcan::ServiceClient<uavcan::protocol::GetNodeInfo>* getNodeInfo_client[MAX_NUMBER_OF_CAN_DRIVERS];
static uavcan::Publisher<uavcan::protocol::dynamic_node_id::Allocation>* allocation_pub[MAX_NUMBER_OF_CAN_DRIVERS];
/* Subscribe to all the messages we are going to handle for
Server registry and Node allocation. */
void AP_UAVCAN_Server::subscribe_msgs(AP_UAVCAN* ap_uavcan)
{
if (ap_uavcan == nullptr) {
return;
}
auto* node = ap_uavcan->get_node();
//Register Allocation Message Handler
uavcan::Subscriber<uavcan::protocol::dynamic_node_id::Allocation, AllocationCb> *AllocationListener;
AllocationListener = new uavcan::Subscriber<uavcan::protocol::dynamic_node_id::Allocation, AllocationCb>(*node);
if (AllocationListener == nullptr) {
AP_HAL::panic("Allocation Subscriber allocation failed\n\r");
return;
}
const int alloc_listener_res = AllocationListener->start(AllocationCb(ap_uavcan, &trampoline_handleAllocation));
if (alloc_listener_res < 0) {
AP_HAL::panic("Allocation Subscriber start problem\n\r");
return;
}
//We allow anonymous transfers, as they are specifically for Node Allocation
AllocationListener->allowAnonymousTransfers();
//Register Node Status Listener
uavcan::Subscriber<uavcan::protocol::NodeStatus, NodeStatusCb> *NodeStatusListener;
NodeStatusListener = new uavcan::Subscriber<uavcan::protocol::NodeStatus, NodeStatusCb>(*node);
if (NodeStatusListener == nullptr) {
AP_HAL::panic("NodeStatus Subscriber allocation failed\n\r");
return;
}
const int nodestatus_listener_res = NodeStatusListener->start(NodeStatusCb(ap_uavcan, &trampoline_handleNodeStatus));
if (nodestatus_listener_res < 0) {
AP_HAL::panic("NodeStatus Subscriber start problem\n\r");
return;
}
}
/* Method to generate 6byte hash from the Unique ID.
We return it packed inside the referenced NodeData structure */
void AP_UAVCAN_Server::getHash(NodeData &node_data, const uint8_t unique_id[], uint8_t size) const
{
uint64_t hash = FNV_1_OFFSET_BASIS_64;
hash_fnv_1a(size, unique_id, &hash);
// xor-folding per http://www.isthe.com/chongo/tech/comp/fnv/
hash = (hash>>56) ^ (hash&(((uint64_t)1<<56)-1));
// write it to ret
for (uint8_t i=0; i<6; i++) {
node_data.hwid_hash[i] = (hash >> (8*i)) & 0xff;
}
}
//Read Node Data from Storage Region
bool AP_UAVCAN_Server::readNodeData(NodeData &data, uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return false;
}
if (!storage.read_block(&data, (node_id * sizeof(struct NodeData)) + NODEDATA_MAGIC_LEN, sizeof(struct NodeData))) {
//This will fall through to Prearm Check
server_state = STORAGE_FAILURE;
return false;
}
return true;
}
//Write Node Data to Storage Region
bool AP_UAVCAN_Server::writeNodeData(const NodeData &data, uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return false;
}
if (!storage.write_block((node_id * sizeof(struct NodeData)) + NODEDATA_MAGIC_LEN,
&data, sizeof(struct NodeData))) {
server_state = STORAGE_FAILURE;
return false;
}
return true;
}
/* Set Occupation Mask, handy for keeping track of all node ids that
are allocated and all that are available. */
bool AP_UAVCAN_Server::setOccupationMask(uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return false;
}
occupation_mask.set(node_id);
return true;
}
/* Remove Node Data from Server Record in Storage,
and also clear Occupation Mask */
bool AP_UAVCAN_Server::freeNodeID(uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return false;
}
struct NodeData node_data;
//Eliminate from Server Record
memset(&node_data, 0, sizeof(node_data));
writeNodeData(node_data, node_id);
//Clear Occupation Mask
occupation_mask.clear(node_id);
return true;
}
/* Sets the verification mask. This is to be called, once
The Seen Node has been both registered and verified against the
Server Records. */
void AP_UAVCAN_Server::setVerificationMask(uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return;
}
verified_mask.set(node_id);
}
/* Checks if the NodeID is occupied, i.e. its recorded
in the Server Records against a unique ID */
bool AP_UAVCAN_Server::isNodeIDOccupied(uint8_t node_id) const
{
if (node_id > MAX_NODE_ID) {
return false;
}
return occupation_mask.get(node_id);
}
/* Checks if NodeID is verified, i.e. the unique id in
Storage Records matches the one provided by Device with this node id. */
bool AP_UAVCAN_Server::isNodeIDVerified(uint8_t node_id) const
{
if (node_id > MAX_NODE_ID) {
return false;
}
return verified_mask.get(node_id);
}
/* Go through Server Records, and fetch node id that matches the provided
Unique IDs hash.
Returns 255 if no Node ID was detected */
uint8_t AP_UAVCAN_Server::getNodeIDForUniqueID(const uint8_t unique_id[], uint8_t size)
{
uint8_t node_id = 255;
NodeData node_data, cmp_node_data;
getHash(cmp_node_data, unique_id, size);
for (int i = MAX_NODE_ID; i >= 0; i--) {
if (!isNodeIDOccupied(i)) { // No point in checking NodeID that's not taken
continue;
}
if (!readNodeData(node_data, i)) {
break; //Storage module has failed, report that as no NodeID detected
}
if (memcmp(node_data.hwid_hash, cmp_node_data.hwid_hash, sizeof(NodeData::hwid_hash)) == 0) {
node_id = i;
break;
}
}
return node_id;
}
/* Hash the Unique ID and add it to the Server Record
for specified Node ID. */
bool AP_UAVCAN_Server::addNodeIDForUniqueID(uint8_t node_id, const uint8_t unique_id[], uint8_t size)
{
NodeData node_data;
getHash(node_data, unique_id, size);
//Generate CRC for validating the data when read back
node_data.crc = crc_crc8(node_data.hwid_hash, sizeof(node_data.hwid_hash));
//Write Data to the records
if (!writeNodeData(node_data, node_id)) {
server_state = FAILED_TO_ADD_NODE;
fault_node_id = node_id;
return false;
}
setOccupationMask(node_id);
return true;
}
//Checks if a valid Server Record is present for specified Node ID
bool AP_UAVCAN_Server::isValidNodeDataAvailable(uint8_t node_id)
{
NodeData node_data;
readNodeData(node_data, node_id);
uint8_t crc = crc_crc8(node_data.hwid_hash, sizeof(node_data.hwid_hash));
if (crc == node_data.crc && node_data.crc != 0) {
return true;
}
return false;
}
/* Initialises Publishers for respective UAVCAN Instance
Also resets the Server Record in case there is a mismatch
between specified node id and unique id against the existing
Server Record. */
bool AP_UAVCAN_Server::init(AP_UAVCAN *ap_uavcan)
{
if (ap_uavcan == nullptr) {
return false;
}
//Read the details from ap_uavcan
uavcan::Node<0>* _node = ap_uavcan->get_node();
uint8_t node_id = _node->getNodeID().get();
uint8_t driver_index = ap_uavcan->get_driver_index();
uint8_t own_unique_id[16] = {0};
uint8_t own_unique_id_len = 16;
//copy unique id from node to uint8_t array
uavcan::copy(_node->getHardwareVersion().unique_id.begin(),
_node->getHardwareVersion().unique_id.end(),
own_unique_id);
server_state = HEALTHY;
//Setup publisher for this driver index
allocation_pub[driver_index] = new uavcan::Publisher<uavcan::protocol::dynamic_node_id::Allocation>(*_node);
if (allocation_pub[driver_index] == nullptr) {
return false;
}
int res = allocation_pub[driver_index]->init(uavcan::TransferPriority::Default);
if (res < 0) {
return false;
}
allocation_pub[driver_index]->setTxTimeout(uavcan::MonotonicDuration::fromMSec(uavcan::protocol::dynamic_node_id::Allocation::FOLLOWUP_TIMEOUT_MS));
//Setup GetNodeInfo Client
getNodeInfo_client[driver_index] = new uavcan::ServiceClient<uavcan::protocol::GetNodeInfo>(*_node);
if (getNodeInfo_client[driver_index] == nullptr) {
return false;
}
res = getNodeInfo_client[driver_index]->init();
if (res < 0) {
return false;
}
getNodeInfo_client[driver_index]->setCallback(trampoline_handleNodeInfo);
/* Go through our records and look for valid NodeData, to initialise
occupation mask */
for (uint8_t i = 0; i <= MAX_NODE_ID; i++) {
if (isValidNodeDataAvailable(i)) {
occupation_mask.set(i);
}
}
// Check if the magic is present
uint16_t magic;
storage.read_block(&magic, 0, NODEDATA_MAGIC_LEN);
if (magic != NODEDATA_MAGIC) {
//Its not there a reset should write it in the Storage
reset();
}
// Making sure that the server is started with the same node ID
const uint8_t stored_own_node_id = getNodeIDForUniqueID(own_unique_id, own_unique_id_len);
static bool reset_done;
if (stored_own_node_id != 255) {
if (stored_own_node_id != node_id) {
/* We have a different node id recorded against our own unique id
This calls for a reset */
if (!reset_done) {
/* ensure we only reset once per power cycle
else we will wipe own record on next init(s) */
reset();
reset_done = true;
}
//Add ourselves to the Server Record
if (!addNodeIDForUniqueID(node_id, own_unique_id, own_unique_id_len)) {
return false;
}
}
} else {
//We have no record of our own Unique ID do a reset
if (!reset_done) {
/* ensure we only reset once per power cycle
else we will wipe own record on next init(s) */
reset();
reset_done = true;
}
//Add ourselves to the Server Record
if (!addNodeIDForUniqueID(node_id, own_unique_id, own_unique_id_len)) {
return false;
}
}
/* Also add to seen node id this is to verify
if any duplicates are on the bus carrying our Node ID */
addToSeenNodeMask(node_id);
setVerificationMask(node_id);
self_node_id[driver_index] = node_id;
return true;
}
//Reset the Server Records
void AP_UAVCAN_Server::reset()
{
NodeData node_data;
memset(&node_data, 0, sizeof(node_data));
occupation_mask.clearall();
//Just write empty Node Data to the Records
for (uint8_t i = 0; i <= MAX_NODE_ID; i++) {
writeNodeData(node_data, i);
}
//Ensure we mark magic at the end
uint16_t magic = NODEDATA_MAGIC;
storage.write_block(0, &magic, NODEDATA_MAGIC_LEN);
}
/* Go through the Occupation mask for available Node ID
based on pseudo code provided in
uavcan/protocol/dynamic_node_id/1.Allocation.uavcan */
uint8_t AP_UAVCAN_Server::findFreeNodeID(uint8_t preferred)
{
// Search up
uint8_t candidate = (preferred > 0) ? preferred : 125;
while (candidate <= 125) {
if (!isNodeIDOccupied(candidate)) {
return candidate;
}
candidate++;
}
//Search down
candidate = (preferred > 0) ? preferred : 125;
while (candidate > 0) {
if (!isNodeIDOccupied(candidate)) {
return candidate;
}
candidate--;
}
// Not found
return 255;
}
//Check if we have received Node Status from this node_id
bool AP_UAVCAN_Server::isNodeSeen(uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return false;
}
return node_seen_mask.get(node_id);
}
/* Set the Seen Node Mask, to be called when received
Node Status from the node id */
void AP_UAVCAN_Server::addToSeenNodeMask(uint8_t node_id)
{
if (node_id > MAX_NODE_ID) {
return;
}
node_seen_mask.set(node_id);
}
/* Run through the list of seen node ids for verification no more
than once per 5 second. We continually verify the nodes in our
seen list, So that we can raise issue if there are duplicates
on the bus. */
void AP_UAVCAN_Server::verify_nodes(AP_UAVCAN *ap_uavcan)
{
uint32_t now = AP_HAL::millis();
if ((now - last_verification_request) < 5000) {
return;
}
//Check if we got acknowledgement from previous request
//except for requests using our own node_id
for (uint8_t i = 0; i < MAX_NUMBER_OF_CAN_DRIVERS; i++) {
if (curr_verifying_node == self_node_id[i]) {
nodeInfo_resp_rcvd = true;
}
}
if (!nodeInfo_resp_rcvd) {
/* Also notify GCS about this
Reason for this could be either the node was disconnected
Or a node with conflicting ID appeared and is sending response
at the same time. */
/* Only report if the node was verified, otherwise ignore
as this could be just Bootloader to Application transition. */
if (isNodeIDVerified(curr_verifying_node)) {
gcs().send_text(MAV_SEVERITY_ERROR, "UC Node %d Down!", curr_verifying_node);
// remove verification flag for this node
verified_mask.clear(curr_verifying_node);
}
}
last_verification_request = now;
//Find the next registered Node ID to be verified.
for (uint8_t i = 0; i <= MAX_NODE_ID; i++) {
curr_verifying_node = (curr_verifying_node + 1) % (MAX_NODE_ID + 1);
if (isNodeSeen(curr_verifying_node)) {
break;
}
}
for (uint8_t i = 0; i < MAX_NUMBER_OF_CAN_DRIVERS; i++) {
if (getNodeInfo_client[i] != nullptr && isNodeIDOccupied(curr_verifying_node)) {
uavcan::protocol::GetNodeInfo::Request request;
getNodeInfo_client[i]->call(curr_verifying_node, request);
nodeInfo_resp_rcvd = false;
}
}
}
/* Handles Node Status Message, adds to the Seen Node list
Also starts the Service call for Node Info to complete the
Verification process. */
void AP_UAVCAN_Server::handleNodeStatus(uint8_t node_id, const NodeStatusCb &cb)
{
if (node_id > MAX_NODE_ID) {
return;
}
if (!isNodeIDVerified(node_id)) {
//immediately begin verification of the node_id
for (uint8_t i = 0; i < MAX_NUMBER_OF_CAN_DRIVERS; i++) {
if (getNodeInfo_client[i] != nullptr) {
uavcan::protocol::GetNodeInfo::Request request;
getNodeInfo_client[i]->call(node_id, request);
}
}
}
//Add node to seen list if not seen before
addToSeenNodeMask(node_id);
}
//Trampoline call for handleNodeStatus member method
void trampoline_handleNodeStatus(AP_UAVCAN* ap_uavcan, uint8_t node_id, const NodeStatusCb &cb)
{
if (ap_uavcan == nullptr) {
return;
}
AP::uavcan_server().handleNodeStatus(node_id, cb);
}
/* Node Info message handler
Handle responses from GetNodeInfo Request. We verify the node info
against our records. Marks Verification mask if already recorded,
Or register if the node id is available and not recorded for the
received Unique ID */
void AP_UAVCAN_Server::handleNodeInfo(uint8_t node_id, uint8_t unique_id[], char name[])
{
if (node_id > MAX_NODE_ID) {
return;
}
if (isNodeIDOccupied(node_id)) {
//if node_id already registered, just verify if Unique ID matches as well
if (node_id == getNodeIDForUniqueID(unique_id, 16)) {
if (node_id == curr_verifying_node) {
nodeInfo_resp_rcvd = true;
}
setVerificationMask(node_id);
} else {
/* This is a device with node_id already registered
for another device */
server_state = DUPLICATE_NODES;
fault_node_id = node_id;
memcpy(fault_node_name, name, sizeof(fault_node_name));
}
} else {
/* Node Id was not allocated by us, or during this boot, let's register this in our records
Check if we allocated this Node before */
uint8_t prev_node_id = getNodeIDForUniqueID(unique_id, 16);
if (prev_node_id != 255) {
//yes we did, remove this registration
freeNodeID(prev_node_id);
}
//add a new server record
addNodeIDForUniqueID(node_id, unique_id, 16);
//Verify as well
setVerificationMask(node_id);
if (node_id == curr_verifying_node) {
nodeInfo_resp_rcvd = true;
}
}
}
//Trampoline call for handleNodeInfo member call
void trampoline_handleNodeInfo(const uavcan::ServiceCallResult<uavcan::protocol::GetNodeInfo>& resp)
{
uint8_t node_id, unique_id[16] = {0};
char name[15] = {0};
node_id = resp.getResponse().getSrcNodeID().get();
//copy the unique id from message to uint8_t array
uavcan::copy(resp.getResponse().hardware_version.unique_id.begin(),
resp.getResponse().hardware_version.unique_id.end(),
unique_id);
snprintf(name, ARRAY_SIZE(name), "%s", resp.getResponse().name.c_str());
AP::uavcan_server().handleNodeInfo(node_id, unique_id, name);
}
/* Handle the allocation message from the devices supporting
dynamic node allocation. */
void AP_UAVCAN_Server::handleAllocation(uint8_t driver_index, uint8_t node_id, const AllocationCb &cb)
{
if (allocation_pub[driver_index] == nullptr) {
//init has not been called for this driver.
return;
}
if (!cb.msg->isAnonymousTransfer()) {
//Ignore Allocation messages that are not DNA requests
return;
}
uint32_t now = AP_HAL::millis();
if (driver_index == current_driver_index) {
last_activity_ms = now;
} else if ((now - last_activity_ms) > 500) {
/* prepare for requests on another driver if we didn't had any activity on
current driver for more than 500ms */
current_driver_index = driver_index;
last_activity_ms = now;
rcvd_unique_id_offset = 0;
memset(rcvd_unique_id, 0, sizeof(rcvd_unique_id));
} else {
/* we ignore the requests from other drivers,
while busy handling the current one */
return;
}
if (cb.msg->first_part_of_unique_id) {
rcvd_unique_id_offset = 0;
memset(rcvd_unique_id, 0, sizeof(rcvd_unique_id));
} else if (rcvd_unique_id_offset == 0) {
//we are only accepting first part
return;
}
if ((rcvd_unique_id_offset + cb.msg->unique_id.size()) > 16) {
//This request is malformed, Reset!
rcvd_unique_id_offset = 0;
memset(rcvd_unique_id, 0, sizeof(rcvd_unique_id));
return;
}
//copy over the unique_id
for (uint8_t i=rcvd_unique_id_offset; i<(rcvd_unique_id_offset + cb.msg->unique_id.size()); i++) {
rcvd_unique_id[i] = cb.msg->unique_id[i - rcvd_unique_id_offset];
}
rcvd_unique_id_offset += cb.msg->unique_id.size();
//send follow up message
uavcan::protocol::dynamic_node_id::Allocation msg;
if (rcvd_unique_id_offset == 16) {
//We have received the full Unique ID, time to do allocation
uint8_t resp_node_id = getNodeIDForUniqueID((const uint8_t*)rcvd_unique_id, 16);
if (resp_node_id == 255) {
resp_node_id = findFreeNodeID(cb.msg->node_id);
if (resp_node_id != 255) {
if (addNodeIDForUniqueID(resp_node_id, (const uint8_t*)rcvd_unique_id, 16)) {
msg.node_id = resp_node_id;
}
} else {
gcs().send_text(MAV_SEVERITY_ERROR, "UC Node Alloc Failed!");
}
} else {
msg.node_id = resp_node_id;
}
}
/* Respond with the message containing the received unique ID so far
or with node id if we successfully allocated one. */
for (uint8_t i = 0; i < rcvd_unique_id_offset; i++) {
msg.unique_id.push_back(rcvd_unique_id[i]);
}
allocation_pub[driver_index]->broadcast(msg);
}
//Trampoline Call for handleAllocation member call
void trampoline_handleAllocation(AP_UAVCAN* ap_uavcan, uint8_t node_id, const AllocationCb &cb)
{
if (ap_uavcan == nullptr) {
return;
}
AP::uavcan_server().handleAllocation(ap_uavcan->get_driver_index(), node_id, cb);
}
//report the server state, along with failure message if any
bool AP_UAVCAN_Server::prearm_check(char* fail_msg, uint8_t fail_msg_len) const
{
if (server_state == HEALTHY) {
return true;
}
switch (server_state) {
case STORAGE_FAILURE: {
snprintf(fail_msg, fail_msg_len, "UC: Failed to access storage!");
return false;
}
case DUPLICATE_NODES: {
snprintf(fail_msg, fail_msg_len, "UC: Duplicate Node %s../%d!", fault_node_name, fault_node_id);
return false;
}
case FAILED_TO_ADD_NODE: {
snprintf(fail_msg, fail_msg_len, "UC: Failed to add Node %d!", fault_node_id);
return false;
}
default:
break;
}
return false;
}
namespace AP
{
AP_UAVCAN_Server& uavcan_server()
{
static AP_UAVCAN_Server _server(StorageAccess(StorageManager::StorageCANDNA));
return _server;
}
}
#endif //HAL_WITH_UAVCAN

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#pragma once
#include <AP_HAL/AP_HAL.h>
#if HAL_WITH_UAVCAN
#include <uavcan/uavcan.hpp>
#include <AP_Common/Bitmask.h>
#include <StorageManager/StorageManager.h>
//Forward declaring classes
class AllocationCb;
class NodeStatusCb;
class NodeInfoCb;
class AP_UAVCAN;
class AP_UAVCAN_Server
{
StorageAccess storage;
struct NodeData {
uint8_t hwid_hash[6];
uint8_t crc;
};
enum ServerState {
STORAGE_FAILURE = -3,
DUPLICATE_NODES = -2,
FAILED_TO_ADD_NODE = -1,
HEALTHY = 0
};
uint32_t last_verification_request;
uint8_t curr_verifying_node;
uint8_t self_node_id[MAX_NUMBER_OF_CAN_DRIVERS];
bool nodeInfo_resp_rcvd;
Bitmask<128> occupation_mask;
Bitmask<128> verified_mask;
Bitmask<128> node_seen_mask;
//Error State
enum ServerState server_state;
uint8_t fault_node_id;
char fault_node_name[15];
//Allocation params
uint8_t rcvd_unique_id[16];
uint8_t rcvd_unique_id_offset;
uint8_t current_driver_index;
uint32_t last_activity_ms;
//Methods to handle and report Node IDs seen on the bus
void addToSeenNodeMask(uint8_t node_id);
bool isNodeSeen(uint8_t node_id);
//Generates 6Byte long hash from the specified unique_id
void getHash(NodeData &node_data, const uint8_t unique_id[], uint8_t size) const;
//Reads the Server Record from storage for specified node id
bool readNodeData(NodeData &data, uint8_t node_id);
//Writes the Server Record from storage for specified node id
bool writeNodeData(const NodeData &data, uint8_t node_id);
//Methods to set, clear and report NodeIDs allocated/registered so far
bool setOccupationMask(uint8_t node_id);
bool isNodeIDOccupied(uint8_t node_id) const;
bool freeNodeID(uint8_t node_id);
//Set the mask to report that the unique id matches the record
void setVerificationMask(uint8_t node_id);
//Go through List to find node id for specified unique id
uint8_t getNodeIDForUniqueID(const uint8_t unique_id[], uint8_t size);
//Add Node ID info to the record and setup necessary mask fields
bool addNodeIDForUniqueID(uint8_t node_id, const uint8_t unique_id[], uint8_t size);
//Finds next available free Node, starting from preferred NodeID
uint8_t findFreeNodeID(uint8_t preferred);
//Look in the storage and check if there's a valid Server Record there
bool isValidNodeDataAvailable(uint8_t node_id);
public:
AP_UAVCAN_Server(StorageAccess _storage) : storage(_storage) {}
// Do not allow copies
AP_UAVCAN_Server(const AP_UAVCAN_Server &other) = delete;
AP_UAVCAN_Server &operator=(const AP_UAVCAN_Server&) = delete;
//Initialises publisher and Server Record for specified uavcan driver
bool init(AP_UAVCAN *ap_uavcan);
//Reset the Server Record
void reset();
/* Checks if the node id has been verified against the record
Specific CAN drivers are expected to check use this method to
verify if the node is healthy and has static node_id against
hwid in the records */
bool isNodeIDVerified(uint8_t node_id) const;
/* Subscribe to the messages to be handled for maintaining and allocating
Node ID list */
static void subscribe_msgs(AP_UAVCAN* ap_uavcan);
//report the server state, along with failure message if any
bool prearm_check(char* fail_msg, uint8_t fail_msg_len) const;
//Callbacks
void handleAllocation(uint8_t driver_index, uint8_t node_id, const AllocationCb &cb);
void handleNodeStatus(uint8_t node_id, const NodeStatusCb &cb);
void handleNodeInfo(uint8_t node_id, uint8_t unique_id[], char name[]);
//Run through the list of seen node ids for verification
void verify_nodes(AP_UAVCAN *ap_uavcan);
};
namespace AP
{
AP_UAVCAN_Server& uavcan_server();
}
#endif

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@ -1,315 +0,0 @@
/*
* This file is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Siddharth Bharat Purohit
*/
#include <AP_HAL/AP_HAL.h>
#if HAL_WITH_UAVCAN
#include "AP_UAVCAN_Servers.h"
#ifdef HAS_UAVCAN_SERVERS
#include <uavcan/protocol/dynamic_node_id_server/event.hpp>
#include <uavcan/protocol/dynamic_node_id_server/storage_backend.hpp>
#include <uavcan/protocol/dynamic_node_id_server/centralized.hpp>
#include <uavcan/protocol/HardwareVersion.hpp>
#include <AP_BoardConfig/AP_BoardConfig.h>
#include <AP_BoardConfig/AP_BoardConfig_CAN.h>
#include <AP_Common/AP_Common.h>
#include <AP_Logger/AP_Logger.h>
#include <AP_Filesystem/AP_Filesystem.h>
#ifndef UAVCAN_NODE_DB_PATH
#define UAVCAN_NODE_DB_PATH HAL_BOARD_STORAGE_DIRECTORY "/UAVCAN"
#endif
#include <AP_HAL/AP_HAL.h>
extern const AP_HAL::HAL& hal;
#define debug_uavcan(fmt, args...) do { hal.console->printf(fmt, ##args); } while (0)
class AP_UAVCAN_CentralizedServer : public uavcan::dynamic_node_id_server::CentralizedServer
{
public:
AP_UAVCAN_CentralizedServer(uavcan::INode& node, uavcan::dynamic_node_id_server::IStorageBackend &storage_backend, uavcan::dynamic_node_id_server::IEventTracer &tracer) :
uavcan::dynamic_node_id_server::CentralizedServer(node, storage_backend, tracer) {}
};
class AP_UAVCAN_FileEventTracer : public uavcan::dynamic_node_id_server::IEventTracer
{
protected:
virtual void onEvent(uavcan::dynamic_node_id_server::TraceCode code, uavcan::int64_t argument) override
{
AP::logger().Write("UCEV", "TimeUS,code,arg", "s--", "F--", "Qhq", AP_HAL::micros64(), code, argument);
}
};
class AP_UAVCAN_RestartRequestHandler : public uavcan::IRestartRequestHandler {
public:
bool handleRestartRequest(uavcan::NodeID request_source) override {
// swiped from reboot handling in GCS_Common.cpp
if (hal.util->get_soft_armed()) {
// refuse reboot when armed
return false;
}
AP_Notify *notify = AP_Notify::get_singleton();
if (notify) {
AP_Notify::flags.firmware_update = 1;
notify->update();
}
// force safety on
hal.rcout->force_safety_on();
// flush pending parameter writes
AP_Param::flush();
hal.scheduler->delay(200);
hal.scheduler->reboot(false);
return true;
}
};
class AP_UAVCAN_FileStorageBackend : public uavcan::dynamic_node_id_server::IStorageBackend
{
/**
* Maximum length of full path including / and key max
*/
enum { MaxPathLength = 128 };
enum { MaxNumOpens = 100 };
/**
* This type is used for the path
*/
typedef uavcan::MakeString<MaxPathLength>::Type PathString;
PathString base_path;
static uint8_t num_opens;
protected:
virtual String get(const String& key) const override
{
using namespace std;
PathString path = base_path.c_str();
path += key;
String value;
//This is to deter frequent inflight opening and closing of files during an event
//where the device is misbehaving
if (num_opens >= MaxNumOpens) {
return value;
}
num_opens++;
int fd = AP::FS().open(path.c_str(), O_RDONLY);
if (fd >= 0)
{
char buffer[MaxStringLength + 1];
(void)memset(buffer, 0, sizeof(buffer));
ssize_t remaining = MaxStringLength;
ssize_t total_read = 0;
ssize_t nread = 0;
do
{
nread = AP::FS().read(fd, &buffer[total_read], remaining);
if (nread > 0)
{
remaining -= nread,
total_read += nread;
}
}
while (nread > 0 && remaining > 0);
AP::FS().close(fd);
if (total_read > 0)
{
for (int i = 0; i < total_read; i++)
{
if (buffer[i] == ' ' || buffer[i] == '\n' || buffer[i] == '\r')
{
buffer[i] = '\0';
break;
}
}
value = buffer;
}
}
return value;
}
virtual void set(const String& key, const String& value) override
{
using namespace std;
PathString path = base_path.c_str();
path += key;
//This is to deter frequent inflight opening and closing of files during an event
//where the device is misbehaving
if (num_opens >= MaxNumOpens) {
return;
}
num_opens++;
int fd = AP::FS().open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC);
if (fd >= 0)
{
ssize_t remaining = value.size();
ssize_t total_written = 0;
ssize_t written = 0;
do
{
written = AP::FS().write(fd, &value.c_str()[total_written], remaining);
if (written > 0)
{
total_written += written;
remaining -= written;
}
}
while (written > 0 && remaining > 0);
AP::FS().fsync(fd);
AP::FS().close(fd);
}
}
public:
/**
* Initializes the file based backend storage by passing a path to
* the directory where the key named files will be stored.
* The return value should be 0 on success.
* If it is -ErrInvalidConfiguration then the the path name is too long to
* accommodate the trailing slash and max key length.
*/
int init(const PathString& path)
{
using namespace std;
int rv = -uavcan::ErrInvalidParam;
if (path.size() > 0)
{
base_path = path.c_str();
if (base_path.back() == '/')
{
base_path.pop_back();
}
rv = 0;
struct stat sb;
if (AP::FS().stat(base_path.c_str(), &sb) != 0 || !S_ISDIR(sb.st_mode))
{
rv = AP::FS().mkdir(base_path.c_str());
}
if (rv >= 0)
{
base_path.push_back('/');
if ((base_path.size() + MaxStringLength) > MaxPathLength)
{
rv = -uavcan::ErrInvalidConfiguration;
}
}
}
return rv;
}
};
uint8_t AP_UAVCAN_FileStorageBackend::num_opens = 0;
bool AP_UAVCAN_Servers::init(uavcan::Node<0> &node)
{
if (_server_instance != nullptr) {
return true;
}
int ret = 0;
_storage_backend = new AP_UAVCAN_FileStorageBackend;
if (_storage_backend == nullptr) {
debug_uavcan("UAVCAN_Servers: Failed to Allocate FileStorageBackend\n");
goto failed;
}
ret = _storage_backend->init(UAVCAN_NODE_DB_PATH);
if (ret < 0) {
debug_uavcan("UAVCAN_Servers: FileStorageBackend init: %d, errno: %d\n", ret, errno);
goto failed;
}
_tracer = new AP_UAVCAN_FileEventTracer;
if (_tracer == nullptr) {
debug_uavcan("UAVCAN_Servers: Failed to Allocate FileEventTracer\n");
goto failed;
}
_server_instance = new AP_UAVCAN_CentralizedServer(node, *_storage_backend, *_tracer);
if (_server_instance == nullptr) {
debug_uavcan("UAVCAN_Servers: Failed to Allocate Server\n");
goto failed;
}
{
uavcan::dynamic_node_id_server::centralized::Storage storage(*_storage_backend);
if (storage.getNodeIDForUniqueID(node.getHardwareVersion().unique_id) != node.getNodeID()) {
//Node ID was changed, reseting database
reset();
}
}
if (_restart_request_handler == nullptr) {
_restart_request_handler = new AP_UAVCAN_RestartRequestHandler();
if (_restart_request_handler == nullptr) {
goto failed;
}
}
node.setRestartRequestHandler(_restart_request_handler);
//Start Dynamic Node Server
ret = _server_instance->init(node.getHardwareVersion().unique_id);
if (ret < 0) {
debug_uavcan("UAVCAN_Server init: %d, errno: %d\n", ret, errno);
goto failed;
}
return true;
failed:
delete _restart_request_handler;
delete _storage_backend;
delete _tracer;
delete _server_instance;
return false;
}
void AP_UAVCAN_Servers::reset()
{
debug_uavcan("UAVCAN_Servers: Resetting Server Database...\n");
DIR* dp;
struct dirent* ep;
dp = AP::FS().opendir(UAVCAN_NODE_DB_PATH);
char abs_filename[100];
if (dp != NULL)
{
while((ep = AP::FS().readdir(dp))) {
snprintf(abs_filename, 100, "%s/%s", UAVCAN_NODE_DB_PATH, ep->d_name);
AP::FS().unlink(abs_filename);
}
}
AP::FS().closedir(dp);
}
#endif
#endif //HAL_WITH_UAVCAN

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@ -1,32 +0,0 @@
#pragma once
#include <AP_HAL/AP_HAL.h>
#include <AP_Filesystem/AP_Filesystem.h>
#if HAVE_FILESYSTEM_SUPPORT
#define HAS_UAVCAN_SERVERS
#include <uavcan/uavcan.hpp>
//Forward declaring classes
class AP_UAVCAN_FileEventTracer;
class AP_UAVCAN_FileStorageBackend;
class AP_UAVCAN_CentralizedServer;
class AP_UAVCAN_RestartRequestHandler;
class AP_UAVCAN_Servers
{
public:
bool init(uavcan::Node<0> &node);
private:
void reset();
AP_UAVCAN_CentralizedServer *_server_instance;
AP_UAVCAN_FileEventTracer *_tracer;
AP_UAVCAN_FileStorageBackend *_storage_backend;
AP_UAVCAN_RestartRequestHandler *_restart_request_handler; // one for all nodes....
};
#endif