45. Serialized Data Buffer

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

typedef struct __attribute__((__packed__)){
    uint8_t  start;
    uint8_t  command;
    uint16_t value;
    uint8_t  status;
    uint32_t checksum;
    uint8_t  end;
}packet;
void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    
    uint8_t buffer[10];
    uint8_t *buff = buffer; 
    
    packet data;
    packet *pkt = &data;
    
    data.start    = 0xA5;
    data.command  = command;
    data.value    = value;
    data.status   = status;
    data.checksum = checksum;
    data.end      = 0x5A;

    buff = (uint8_t *)pkt;

    for(int i = 0; i < 10; i++)
    {
        printf("%d ",*(buff + i));
    }
}

int main() {
    uint8_t cmd, status;
    uint16_t val;
    uint32_t crc;

    scanf("%hhu %hu %hhu %u", &cmd, &val, &status, &crc);
    build_packet(cmd, val, status, crc);
    return 0;
}