packet.h

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#ifndef _DCC_PACKET_H_
#define _DCC_PACKET_H_
 
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define DCC_PACKET_MAX_PAYLOAD (32)
#define DCC_PACKET_EMERGENCY_STOP (0xFFFF)
#define DCC_PACKET_CHANGE_DIR (0xFFFF)
 
typedef struct dcc_packet
{
    struct pkt_t
    {
        uint8_t is_pkt : 1;
        uint8_t is_marklin : 1;
 
        uint8_t skip_ec : 1;
        uint8_t send_long_preamble : 1;
        uint8_t sense_ack : 1;
        uint8_t rept_count : 2;
        uint8_t csum_error : 1;
    };
 
    struct cmd_t
    {
        uint8_t is_pkt : 1;
        uint8_t cmd : 7;
    };
 
    union
    {
        uint8_t header_raw_data;
        struct pkt_t packet_header;
        struct cmd_t command_header;
    };
    uint8_t dlc;
    uint8_t payload[DCC_PACKET_MAX_PAYLOAD];
 
    uintptr_t feedback_key;
} DCCPacket;
 
#ifdef __cplusplus
}
#endif
 
#endif /* _DCC_PACKET_H_ */