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

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

diff --git a/CAN-binder/low-can-binding/can/can-decoder.cpp b/CAN-binder/low-can-binding/can/can-decoder.cpp
index a6c064d..e01e43b 100644 (file)
--- a/CAN-binder/low-can-binding/can/can-decoder.cpp
+++ b/CAN-binder/low-can-binding/can/can-decoder.cpp
@@ -20,6 +20,8 @@
 #include "canutil/read.h"
 #include "../utils/openxc-utils.hpp"
 
+#include "../low-can-binding.hpp"
+
 /// @brief Parse the signal's bitfield from the given data and return the raw
 /// value.
 ///
@@ -145,23 +147,30 @@ openxc_DynamicField decoder_t::stateDecoder(can_signal_t& signal,
 /// @param[in] signal - The details of the signal to decode and forward.
 /// @param[in] message - The received CAN message that should contain this signal.
 /// @param[in] signals - an array of all active signals.
+/// @param[out] send - An output parameter that will be flipped to false if the value could
+///      not be decoded.
 ///
 /// The decoder returns an openxc_DynamicField, which may contain a number,
 /// string or boolean.
 ///
 openxc_DynamicField decoder_t::translateSignal(can_signal_t& signal, can_message_t& message,
-       const std::vector<can_signal_t>& signals)
+       const std::vector<can_signal_t>& signals, bool* send)
 {
        float value = decoder_t::parseSignalBitfield(signal, message);
        DEBUG(binder_interface, "%s: Decoded message from parseSignalBitfield: %f", __FUNCTION__, value);
 
-       bool send = true;
        // Must call the decoders every time, regardless of if we are going to
        // decide to send the signal or not.
        openxc_DynamicField decoded_value = decoder_t::decodeSignal(signal,
-                       value, signals, &send);
+                       value, signals, send);
 
        signal.set_received(true);
+
+       // Don't send if they is no changes
+       if ((signal.get_last_value() == value && !signal.get_send_same()) || !send )
+       {
+               *send = false;
+       }
        signal.set_last_value(value);
        return decoded_value;
 }