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];
    int i;
    // Your logic to fill buffer
    // Then print buffer
    buffer[0] = 0xA5;
    buffer[1] = command;
    for(i=0;i<2;i++){
        buffer[i+2] = (value >> 8*i) & 0xFF;
    }
    buffer[4] = status;
    for(i=0;i<4;i++){
        buffer[i+5] = (checksum >> 8*i) & 0xFF;
    }
    buffer[9] = 0x5A;
    for(i=0;i<10;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;
}

Solving Approach