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];
    buffer[0] |= 0xA5;
    buffer[1] |= command;
    buffer[2] |= (0xff & value );
    buffer[3] |= ((value >> 8) & 0xff);
    buffer[4] |= status;
    buffer[5] |= (checksum & 0xff);
    buffer[6] |= ((checksum>>8) & 0xff);
    buffer[7] |= ((checksum>>16) & 0xff);
    buffer[8] |= ((checksum>>24) & 0xff);
    buffer[9] |= 0x5A;

    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;
}

Solving Approach