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authorRomain Forlot <romain.forlot@iot.bzh>2019-12-04 17:26:58 +0100
committerRomain Forlot <romain.forlot@iot.bzh>2020-01-09 16:25:36 +0100
commit0ff6413b6dc42849f87ce8caa17a91f44ede2f93 (patch)
tree4ad97df3b971fe8d7d6a3a07f4563ec80d2c03fa /low-can-binding/can/message
parent7f905a75de0600ef0c2316db0f3deaa33aabd9e7 (diff)
decoder: rework how to swap frame layout.
This also change the bit_position to retrieve the bit word starting from the left or the right of the frame depending on the endianness of the frame layout. Change-Id: I28658e9d46bd35d8ecabeece317331832229384a Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'low-can-binding/can/message')
-rw-r--r--low-can-binding/can/message/message.cpp11
-rw-r--r--low-can-binding/can/message/message.hpp3
2 files changed, 13 insertions, 1 deletions
diff --git a/low-can-binding/can/message/message.cpp b/low-can-binding/can/message/message.cpp
index 22887c9a..56e9379f 100644
--- a/low-can-binding/can/message/message.cpp
+++ b/low-can-binding/can/message/message.cpp
@@ -177,3 +177,14 @@ void message_t::set_length(uint32_t length)
{
length_ = length;
}
+
+void message_t::frame_swap()
+{
+ int i;
+ uint8_t *temp = (uint8_t*)alloca(length_);
+
+ for(i = 0; i < length_; i++)
+ temp[i] = data_[length_ - i - 1];
+
+ memcpy(data_.data(), temp, length_);
+}
diff --git a/low-can-binding/can/message/message.hpp b/low-can-binding/can/message/message.hpp
index 9a074e31..e5e6769b 100644
--- a/low-can-binding/can/message/message.hpp
+++ b/low-can-binding/can/message/message.hpp
@@ -44,7 +44,7 @@
#define ISOTP_SEND 0x0020
#define ISOTP_RECEIVE 0x0040
#define CAN_PROTOCOL_WITH_FD_FRAME 0x0080
-#define FRAME_LAYOUT_IS_LE 0x0100
+#define FRAME_LAYOUT_IS_LE 0x0100 // LE stand for Little Endian
/// @class message_t
///
@@ -84,4 +84,5 @@ public:
uint32_t get_maxdlen();
void set_maxdlen(uint32_t maxdlen);
void set_length(uint32_t length);
+ void frame_swap();
};