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updated can.h to have arduino specific can_frame 3 bytes smaller than can_frame structure used by other compilers #134

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updated can.h to have arduino specific can_frame 3 bytes smaller than can_frame structure used by other compilers #134

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8 changes: 8 additions & 0 deletions can.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,10 +36,18 @@ typedef __u32 canid_t;
#define CAN_MAX_DLC 8
#define CAN_MAX_DLEN 8

#if defined(Arduino_h)
struct can_frame {
canid_t can_id; /* 32 bit CAN_ID + EFF/RTR/ERR flags */
__u8 can_dlc; /* frame payload length in byte (0 .. CAN_MAX_DLEN) */
__u8 data[CAN_MAX_DLEN];
};
#else
struct can_frame {
canid_t can_id; /* 32 bit CAN_ID + EFF/RTR/ERR flags */
__u8 can_dlc; /* frame payload length in byte (0 .. CAN_MAX_DLEN) */
alignas(8) __u8 data[CAN_MAX_DLEN];
};
#endif

#endif /* CAN_H_ */