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;

void print_packet_fields(uint8_t *buffer) {
    // Overlay struct and print values
    Packet p;
    uint16_t DATA = (*(buffer + 3)<<8);
    uint16_t mydata = (*(buffer + 2) | DATA);


    p.start = *(buffer + 0);
    p.command = *(buffer +1);
    p.data = mydata;
    p.crc = *(buffer + 4);
    p.end = *(buffer + 5);
printf("Start: %d\n",p.start);
printf("Command: %d\n",p.command);
printf("Data: %d\n",p.data);
printf("CRC: %d\n",p.crc);
printf("End: %d\n",p.end);

}

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