Serialized Data Buffer

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

#define START       0xA5
#define END         0x5A
void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buffer[10];

    // Your logic to fill buffer
    buffer[0] = START;
    buffer[1] = command;
    buffer[2] = (value & 0x00FF);
    buffer[3] = (value >> 8);
    buffer[4] = status;
    buffer[5] = (checksum & 0x000000FF);
    buffer[6] = (checksum >> 8);
    buffer[7] = (checksum >> 16);
    buffer[8] = (checksum >> 24);
    buffer[9] = END;
    // Then print buffer
    for(int i = 0; i < (sizeof(buffer)/sizeof(buffer[0])); i++)
    {
        printf("%d ", buffer[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;
}