Serialized Data Buffer

Code

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

#pragma pack(push, 1)
typedef struct {
    uint8_t start;
    uint8_t command;
    uint16_t value;
    uint8_t status;
    uint32_t checksum;
    uint8_t end;
}packet ;
#pragma pack(pop)

typedef union packet_buffer{
    packet pkt;
    uint8_t bytes[10];
}packet_buffer;

void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buffer[10];
    // Your logic to fill buffer
    /* SOLUTION 1 ENTER EACH BYTE */
    /*
    buffer[0] = 0xA5; 
    buffer[1] = command ;
    buffer[2] = value & 0xFF ;
    buffer[3] = (value >> 8) & 0xFF;
    buffer[4] = status;
    buffer[5] = (checksum >> 0)& 0xFF;
    buffer[6] = (checksum >> 8) & 0xFF;
    buffer[7] = (checksum >> 16) & 0xFF;
    buffer[8] = (checksum >> 24) & 0xFF;
    buffer[9] = 0x5A;
    // Then print buffer
    for(int i =0 ; i <10 ; i++){
        printf("%hhu ",buffer[i]);
    } 
    */
    /* SOLUTION 2 : USING STRUCTS*/
    packet_buffer my_packet;

    my_packet.pkt.start = 0xA5;
    my_packet.pkt.command = command;
    my_packet.pkt.value = value;
    my_packet.pkt.status = status;
    my_packet.pkt.checksum = checksum;
    my_packet.pkt.end = 0x5A;

    for (int i = 0; i < 10; i++) {
        printf("%hhu ", my_packet.bytes[i]);
    }
    printf("\n");
}

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;
}

Solving Approach