45. 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];
    uint8_t Start = 0xA5,End = 0x5A;
    uint8_t *dataptr = NULL;
    dataptr = buffer;
    dataptr[0] = Start;
    dataptr[1] = command;
    dataptr[2] = (uint8_t)(value & 0xFF);
    dataptr[3] = (uint8_t)(value>>8);
    dataptr[4] = status;
    dataptr[5] = (uint8_t)(checksum&0xFF);
    dataptr[6] = (uint8_t)(checksum>>8);
    dataptr[7] = (uint8_t)(checksum>>16);
    dataptr[8] = (uint8_t)(checksum>>24);
    dataptr[9] = End;
    for(uint8_t index=0;index<10;index++)
    printf("%d ",buffer[index]);
}

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;
}