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 buffer[10];

    // Your logic to fill buffer
    // Then print buffer
    int i=0;
    buffer[i++] = 0xA5;
    buffer[i++] = command;
    buffer[i++] = (uint8_t)(value & 0xFF);
    buffer[i++] = (uint8_t)((value >> 8) & 0xFF);
    buffer[i++] = status;
    buffer[i++] = (uint8_t)(checksum & 0xFF);
    buffer[i++] = (uint8_t)((checksum >> 8) & 0xFF);
    buffer[i++] = (uint8_t)((checksum >> 16) & 0xFF);
    buffer[i++] = (uint8_t)((checksum >> 24) & 0xFF);
    buffer[i] = 0x5A;

    for(int j=0; j<10; j++)
        printf("%d ", buffer[j]);
}

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