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;
        buffer[1] = command;
        buffer[4] = status;
        buffer[9] = 0x5A;
        for(int i = 0; i < 2; i++){
            uint8_t bit = (value >> 8 * i) & 0x00FF;
            buffer[2 + i] = bit; 
        }
        for(int i = 0; i < 4; i++){
            uint8_t bit = (checksum >> 8 * i) & 0x0000FF;
            buffer[5 + i] = bit;
        }
        for(int 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;
    }