Serialized Data Buffer

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

void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buffer[10];
    buffer[0] = (0xA5 & 0xFF);
    buffer[1] = (command & 0xFF);
    buffer[2] = (value & 0xFF);
    buffer[3] = ((value >>8) & 0xFF);
    buffer[4] = (status & 0xFF);
    buffer[5] = ((checksum) & 0xFF);
    buffer[6] = ((checksum >> 8) & 0xFF);
    buffer[7] = ((checksum >> 16) & 0xFF);
    buffer[8] = ((checksum >> 24) & 0xFF);
    buffer[9] = (0x5A & 0xFF);
    for(uint8_t i =0; i <sizeof(buffer); 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;
}