Raw import openXC function to detect obd2 response.

Change-Id: Ieea0396979302329f5884ebef2064bdc7015a45f
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

2 files changed, 46 insertions, 4 deletions

diff --git a/src/obd2-signals.cpp b/src/obd2-signals.cpp
index 69db5e2..1a562d0 100644
--- a/src/obd2-signals.cpp
+++ b/src/obd2-signals.cpp
@@ -102,6 +102,45 @@ void shims_timer()
 {
 }
 
+bool is_obd2_response(can_message_t can_message)
+{
+	if(can_message.get_id() >= 0x7E8 && can_message.get_id() <= 0x7EF)
+	{
+		openxc_VehicleMessage message = {0};
+		message.has_type = true;
+		message.type = openxc_VehicleMessage_Type_DIAGNOSTIC;
+		message.has_diagnostic_response = true;
+		message.diagnostic_response = {0};
+		message.diagnostic_response.has_bus = true;
+		message.diagnostic_response.bus = bus->address;
+		message.diagnostic_response.has_message_id = true;
+		//7DF should respond with a random message id between 7e8 and 7ef
+		//7E0 through 7E7 should respond with a id that is 8 higher (7E0->7E8)
+		if(commandRequest->message_id == 0x7DF)
+		{
+			message.diagnostic_response.message_id = rand()%(0x7EF-0x7E8 + 1) + 0x7E8;
+		}
+		else if(commandRequest->message_id >= 0x7E0 && commandRequest->message_id <= 0x7E7)
+		{
+			message.diagnostic_response.message_id = commandRequest->message_id + 8;
+		}
+		message.diagnostic_response.has_mode = true;
+		message.diagnostic_response.mode = commandRequest->mode;
+		if(commandRequest->has_pid)
+		{
+			message.diagnostic_response.has_pid = true;
+			message.diagnostic_response.pid = commandRequest->pid;
+		}
+		message.diagnostic_response.has_value = true;
+		message.diagnostic_response.value = rand() % 100;
+		pipeline::publish(&message, &getConfiguration()->pipeline);
+	}
+	else //If it's outside the range, the command_request will return false
+	{
+		debug("Sent message ID is outside the valid range for emulator (7DF to 7E7)");
+		status=false;
+};
+
 /*
  * Will scan for supported Obd2 pids
  *
diff --git a/src/obd2-signals.hpp b/src/obd2-signals.hpp
index 5ff63f8..c9fa4f6 100644
--- a/src/obd2-signals.hpp
+++ b/src/obd2-signals.hpp
@@ -21,6 +21,7 @@
 
 #include "uds/uds.h"
 #include "can-bus.hpp"
+#include "can-message.hpp"
 
 #include "low-can-binding.hpp"
 
@@ -64,6 +65,8 @@ std::vector<Obd2Pid>& get_obd2_signals();
 uint32_t get_signal_id(const Obd2Pid& sig);
 void find_obd2_signals(const openxc_DynamicField &key, std::vector<Obd2Pid*>& found_signals);
 
+bool is_obd2_response(can_message_t can_message);
+
 /**
  * @brief - Object to handle obd2 session with pre-scan of supported pid
  * then request them regularly
@@ -83,14 +86,14 @@ class obd2_handler_t {
 		/**
 		 * @brief Check if a request is an OBD-II PID request.
 		 *
-		 * @return true if the request is a mode 1  request and it has a 1 byte PID.
+		 * @return true if the request is a mode 1 request and it has a 1 byte PID.
 		 */
 		bool is_obd2_request(DiagnosticRequest *request);
 
 		/**
 		* @brief Check if requested signal name is an obd2 pid
 		* 
-		* @return true if name began with ob2.* else false.
+		* @return true if name began with obd2 else false.
 		*/
 		bool is_obd2_signal(const char *name);
 
@@ -103,8 +106,8 @@ class obd2_handler_t {
 		* http://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01).
 		*
 		* @param[in] DiagnosticResponse response - the received DiagnosticResponse (the data is in response.payload,
-		*      a byte array). This is most often used when the byte order is
-		*      signiticant, i.e. with many OBD-II PID formulas.
+		*  a byte array). This is most often used when the byte order is
+		*  signiticant, i.e. with many OBD-II PID formulas.
 		* @param[in] float parsed_payload - the entire payload of the response parsed as an int.
 		*/
 		float handle_obd2_pid(const DiagnosticResponse* response, float parsedPayload);