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
        uint8_t *p = buffer;
        *(p++)= 0xA5;
        *(p++)= command;
        for (int i=0; i<2;i++) *(p++)=(uint8_t)(value>>(8*i)&0xff);
        *(p++) = status;
        for (int i=0; i<4;i++) *(p++)=(uint8_t)(checksum>>(8*i)&0xff);
        *p=0x5A;
    // Then print buffer
        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