45. 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];

    // Your logic to fill buffer
    // Then print buffer
    uint8_t start = 0xA5;
    uint8_t stop = 0x5A;
    printf("%d ", start);
    printf("%d ", command);
    uint32_t mask = (1 << 8) - 1;
    printf("%d ", value & mask);
    printf("%d ", value >> 8);
    printf("%d ", status);
    printf("%d ", checksum & mask);
    printf("%d ", (checksum >> 8) & mask);
    printf("%d ", (checksum >> 16) & mask);
    printf("%d ", (checksum >> 24) & mask);
    printf("%d ", stop);
}

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;
}