message: move bit position flag and action

Separate some define to be in a dedicated header file that will
be installed on the system. Then the low-can-generator could use it
instead of having to copy those defines in the generator code.

Change-Id: I1716c8b20f0811ca4ac1e8f13609f05ad7d24d1f
Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh>
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

7 files changed, 68 insertions, 70 deletions

diff --git a/conf.d/cmake/config.cmake b/conf.d/cmake/config.cmake
index 7031c7ef..cedb5e3f 100644
--- a/conf.d/cmake/config.cmake
+++ b/conf.d/cmake/config.cmake
@@ -112,6 +112,8 @@ set(INSTALL_PREFIX $ENV{HOME}/opt)
 # -----------------------------
 list (APPEND link_libraries -pthread)
 
+INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include)
+
 # Compilation options definition
 # Use CMake generator expressions to specify only for a specific language
 # Values are prefilled with default options that is currently used.
diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
new file mode 100644
index 00000000..ebf7c8db
--- /dev/null
+++ b/include/CMakeLists.txt
@@ -0,0 +1,19 @@
+###########################################################################
+# Copyright (C) 2015-2019 "IoT.bzh"
+#
+# author: José Bollo <jose.bollo@iot.bzh>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+INSTALL(DIRECTORY low-can DESTINATION ${CMAKE_INSTALL_FULL_INCLUDEDIR})
diff --git a/include/low-can/can-message.hpp b/include/low-can/can-message.hpp
new file mode 100644
index 00000000..5179594b
--- /dev/null
+++ b/include/low-can/can-message.hpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015, 2019 "IoT.bzh"
+ * Author "Romain Forlot" <romain.forlot@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	 http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#define CAN_MESSAGE_SIZE 8
+
+#define MAX_BCM_CAN_FRAMES 257
+#define MAX_ISOTP_FRAMES 4096
+
+#define J1939_CAN_ID CAN_EFF_FLAG
+#define J1939_CAN_MASK (CAN_EFF_FLAG | CAN_RTR_FLAG)
+
+#define CAN_ISOTP_MAX_DLEN 4096
+
+#define NO_CAN_ID 0xFFFFFFFFU
+
+/**
+ * FLAGS defining how to open socket and how you could decode the frame
+ */
+#define CAN_PROTOCOL		   0x0001
+#define CAN_PROTOCOL_WITH_FD_FRAME 0x0002
+#define J1939_ADDR_CLAIM_PROTOCOL  0x0004
+#define J1939_PROTOCOL		   0x0008
+#define ISOTP_PROTOCOL		   0x0010
+#define ISOTP_SEND		   0x0020
+#define ISOTP_RECEIVE		   0x0040
+#define BYTE_FRAME_IS_BIG_ENDIAN   0x0080
+#define BIT_POSITION_REVERSED	   0x0100
+#define CONTINENTAL_BIT_POSITION   0x0200
+#define INVALID_FLAG		   0x8000
diff --git a/low-can-binding/can/can-decoder.cpp b/low-can-binding/can/can-decoder.cpp
index 7221d716..5fe22541 100644
--- a/low-can-binding/can/can-decoder.cpp
+++ b/low-can-binding/can/can-decoder.cpp
@@ -398,17 +398,6 @@ openxc_DynamicField decoder_t::translate_signal(signal_t& signal, std::shared_pt
 ///
 openxc_DynamicField decoder_t::decode_signal( signal_t& signal, std::shared_ptr<message_t> message, bool* send)
 {
-
-
-	if(signal.get_message()->get_flags() & CONTINENTAL_BIT_POSITION)
-		signal.set_bit_position(converter_t::continental_bit_position_mess(message->get_length(),
-							      signal.get_bit_position(),
-							      signal.get_bit_size()));
-	if(signal.get_message()->get_flags() & BIT_POSITION_REVERSED)
-		signal.set_bit_position(converter_t::bit_position_swap(message->get_length(),
-							      signal.get_bit_position(),
-							      signal.get_bit_size()));
-
 	signal_decoder decoder = signal.get_decoder() == nullptr ?
 							decode_noop : signal.get_decoder();
 
diff --git a/low-can-binding/can/message/message.hpp b/low-can-binding/can/message/message.hpp
index b77ce8bd..6416bcfb 100644
--- a/low-can-binding/can/message/message.hpp
+++ b/low-can-binding/can/message/message.hpp
@@ -24,28 +24,7 @@
 #include <memory>
 #include <linux/can.h>
 #include <linux/can/bcm.h>
-#include "../../utils/timer.hpp"
-
-#define CAN_MESSAGE_SIZE 8
-
-#define MAX_BCM_CAN_FRAMES 257
-#define MAX_ISOTP_FRAMES 4096
-
-
-/**
- * FLAGS
- */
-#define CAN_PROTOCOL		   0x0001
-#define CAN_PROTOCOL_WITH_FD_FRAME 0x0002
-#define J1939_ADDR_CLAIM_PROTOCOL  0x0004
-#define J1939_PROTOCOL		   0x0008
-#define ISOTP_PROTOCOL		   0x0010
-#define ISOTP_SEND		   0x0020
-#define ISOTP_RECEIVE		   0x0040
-#define BYTE_FRAME_IS_BIG_ENDIAN  0x0080
-#define BIT_POSITION_REVERSED	   0x0100
-#define CONTINENTAL_BIT_POSITION   0x0200
-#define INVALID_FLAG		   0x8000
+#include <low-can/can-message.hpp>
 
 /// @class message_t
 ///
diff --git a/low-can-binding/utils/converter.cpp b/low-can-binding/utils/converter.cpp
index 56f3a449..4c0a3a89 100644
--- a/low-can-binding/utils/converter.cpp
+++ b/low-can-binding/utils/converter.cpp
@@ -71,34 +71,4 @@ void converter_t::signal_to_bits_bytes(unsigned int bit_position, unsigned int b
 	new_start_bit = bit_position % CHAR_BIT;
 	new_end_byte = (bit_position + bit_size - 1) >> 3;
 	new_end_bit = (bit_position + bit_size - 1) % CHAR_BIT;
-}
-
-
-/**
- * @brief	This is to use when you have a big endian CAN frame layout.
- * 		It converts the bit position so it matches with little endiant CAN frame layout.
- *
- * @param msg_length 	Message length in bytes.
- * @param bit_position 	Original bit position.
- * @param bit_size	Size of the data.
- * @return uint32_t 	New bit position.
- */
-uint32_t converter_t::bit_position_swap(unsigned int msg_length, unsigned int bit_position, unsigned int bit_size)
-{
-	return (msg_length * CHAR_BIT) - bit_position - bit_size;
-}
-
-/**
- * @brief	This allow to get the correct bit_position using the weird Continental.
- *		bit numbering method where the Frame is read using little endianness
- *		and bit count using a big endianness
- *
- * @param msg_length	Message length in bytes.
- * @param bit_position	Original bit position.
- * @param bit_size	Size of the data.
- * @return uint32_t	New bit position.
- */
-uint32_t converter_t::continental_bit_position_mess(unsigned int msg_length, unsigned int bit_position, unsigned int bit_size)
-{
-	return bit_position + CHAR_BIT - 2 * (bit_position % CHAR_BIT) - bit_size;
-}
+}
\ No newline at end of file
diff --git a/low-can-binding/utils/converter.hpp b/low-can-binding/utils/converter.hpp
index e8a40f5b..1e6ecc18 100644
--- a/low-can-binding/utils/converter.hpp
+++ b/low-can-binding/utils/converter.hpp
@@ -30,10 +30,4 @@ class converter_t
 						 int &new_end_byte,
 						 uint8_t &new_start_bit,
 						 uint8_t &new_end_bit);
-		static uint32_t bit_position_swap(unsigned int msg_length,
-						  unsigned int bit_position,
-						  unsigned int bit_size);
-		static uint32_t continental_bit_position_mess(unsigned int msg_length,
-							      unsigned int bit_position,
-							      unsigned int bit_size);
 };