Check last value before send the event, if no change no event.

[apps/agl-service-can-low-level.git] / CAN-binder / low-can-binding / can / can-bus.cpp

diff --git a/CAN-binder/low-can-binding/can/can-bus.cpp b/CAN-binder/low-can-binding/can/can-bus.cpp
index 6e6fba2..0de8aeb 100644 (file)
--- a/CAN-binder/low-can-binding/can/can-bus.cpp
+++ b/CAN-binder/low-can-binding/can/can-bus.cpp
@@ -15,14 +15,15 @@
  * limitations under the License.
  */
 
-#include <map>
-#include <cerrno>
-#include <vector>
-#include <string>
 #include <net/if.h>
 #include <sys/socket.h>
 #include <json-c/json.h>
 #include <linux/can/raw.h>
+#include <map>
+#include <cerrno>
+#include <vector>
+#include <string>
+#include <algorithm>
 
 #include "can-bus.hpp"
 
@@ -46,6 +47,49 @@ can_bus_t::can_bus_t(utils::config_parser_t conf_file)
 
 std::map<std::string, std::shared_ptr<can_bus_dev_t>> can_bus_t::can_devices_;
 
+/// @brief Listen for all device sockets and fill can_messages_queue with them.
+/// Reading blocks until message arrive on listened sockets.
+///
+/// @return 0 if ok -1 if not
+int can_bus_t::can_reader()
+{
+       fd_set rfds;
+       int sock_max = INVALID_SOCKET;
+
+       FD_ZERO(&rfds);
+
+       for(auto& can_dev : can_devices_)
+       {
+               FD_SET(can_dev.second->get_socket().socket(), &rfds);
+               if (sock_max < can_dev.second->get_socket().socket())
+                       sock_max = can_dev.second->get_socket().socket();
+       }
+
+       int ret;
+       while(is_reading_)
+       {
+               ret = select(sock_max + 1, &rfds, nullptr, nullptr, nullptr);
+
+               if(ret == -1)
+                       perror("select()");
+               else if(ret > 0)
+               {
+                       for(const auto& s: can_devices_)
+                       {
+                               if(FD_ISSET(s.second->get_socket().socket(), &rfds))
+                               {
+                                       can_message_t msg;
+                                       s.second->get_socket() >> msg;
+                                       push_new_can_message(msg);
+                                       }
+                               }
+               }
+               else
+                       printf("Timeout\n");
+       }
+       return 0;
+}
+
 /// @brief Will make the decoding operation on a classic CAN message. It will not
 /// handle CAN commands nor diagnostic messages that have their own method to get
 /// this happens.
@@ -82,13 +126,17 @@ int can_bus_t::process_can_signals(can_message_t& can_message)
                //DEBUG(binder_interface, "Nb elt matched string: %d", (int)s.count(std::string(sig.generic_name));
                if( s.find(sig->get_name()) != s.end() && afb_event_is_valid(s[sig->get_name()]))
                {
-                       decoded_message = decoder_t::translateSignal(*sig, can_message, conf.get_can_signals());
+                       bool send = true;
+                       decoded_message = decoder_t::translateSignal(*sig, can_message, conf.get_can_signals(), &send);
 
-                       openxc_SimpleMessage s_message = build_SimpleMessage(sig->get_name(), decoded_message);
-                       vehicle_message = build_VehicleMessage(s_message);
+                       if(send)
+                       {
+                               openxc_SimpleMessage s_message = build_SimpleMessage(sig->get_name(), decoded_message);
+                               vehicle_message = build_VehicleMessage(s_message);
 
-                       std::lock_guard<std::mutex> decoded_can_message_lock(decoded_can_message_mutex_);
-                       push_new_vehicle_message(vehicle_message);
+                               std::lock_guard<std::mutex> decoded_can_message_lock(decoded_can_message_mutex_);
+                               push_new_vehicle_message(vehicle_message);
+                       }
                        processed_signals++;
                }
        }
@@ -198,6 +246,11 @@ void can_bus_t::can_event_push()
 ///  and push subscribed events.
 void can_bus_t::start_threads()
 {
+       is_reading_ = true;
+       th_reading_ = std::thread(&can_bus_t::can_reader, this);
+       if(!th_reading_.joinable())
+               is_reading_ = false;
+
        is_decoding_ = true;
        th_decoding_ = std::thread(&can_bus_t::can_decode_message, this);
        if(!th_decoding_.joinable())
@@ -214,6 +267,7 @@ void can_bus_t::start_threads()
 /// they'll finish their job.
 void can_bus_t::stop_threads()
 {
+       is_reading_ = false;
        is_decoding_ = false;
        is_pushing_ = false;
 }
@@ -247,7 +301,7 @@ int can_bus_t::init_can_dev()
                                        can_bus_t::can_devices_[device]->configure();
                                        DEBUG(binder_interface, "%s: Start reading thread", __FUNCTION__);
                                        NOTICE(binder_interface, "%s: %s device opened and reading", __FUNCTION__, device.c_str());
-                                       can_bus_t::can_devices_[device]->start_reading(*this);
+                                       //can_bus_t::can_devices_[device]->start_reading(*this);
                                        i++;
                                }
                                else
@@ -335,6 +389,15 @@ void can_bus_t::push_new_vehicle_message(const openxc_VehicleMessage& v_msg)
        vehicle_message_q_.push(v_msg);
 }
 
+/// @brief Create a RX_SETUP receive job for the BCM socket of a CAN signal.
+///
+/// @return 0 if ok -1 if not.
+       int can_bus_t::create_rx_filter(const can_signal_t& s)
+       {
+               const std::string& bus  = s.get_message().get_bus_name();
+               return can_bus_t::can_devices_[bus]->create_rx_filter(s);
+       }
+
 /// @brief Return a map with the can_bus_dev_t initialized
 ///
 /// @return map can_bus_dev_m_ map