79. Extract Packet Fields from Byte Stream

#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint8_t start;
    uint8_t command;
    uint16_t data;
    uint8_t crc;
    uint8_t end;
} Packet;

enum {
    START = 0,
    COMMAND,
    DATA_LOW,
    DATA_HIGH,
    CRC,
    END
}Order;

void print_packet_fields(uint8_t *buffer) {
    // Overlay struct and print values
    /*OPTION : USING ENUM FOR INDEX*/
    Packet pck;
    pck.start = buffer[START];
    pck.command = buffer[COMMAND];
    pck.data = (uint16_t)buffer[DATA_LOW] | ((uint16_t)buffer[DATA_HIGH] << 8);
    pck.crc = buffer[CRC];
    pck.end = buffer[END];

    printf("Start: %u\n", pck.start);
    printf("Command: %u\n", pck.command);
    printf("Data: %u\n", pck.data);
    printf("CRC: %u\n", pck.crc);
    printf("End: %u\n", pck.end);

}
int main() {
    uint8_t buffer[6];
    for (int i = 0; i < 6; i++) {
        scanf("%hhu", &buffer[i]);
    }
    print_packet_fields(buffer);
    return 0;
}