Serialized Data Buffer

Code

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

void build_packet(uint8_t command, uint16_t value, uint8_t status, uint32_t checksum) {
    uint8_t buf[10];

    buf[0] = 0xa5;
    buf[1] = command;
    buf[2] = value & 0xff;
    buf[3] = (value >> 8) & 0xff;
    buf[4] = status;
    buf[5] = checksum & 0xff;
    buf[6] = (checksum >> 8) & 0xff;
    buf[7] = (checksum >> 16) & 0xff;
    buf[8] = (checksum >> 24) & 0xff;
    buf[9] = 0x5a;

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

Solving Approach