char* string to hex arrary in C

I have char * para.mac, string c8934641d0b7 stored in it.

I want to convert it to hex array int m[6], make

m[0]=0xc8;
m2[1]=0x93;
...
m[5]=0xb7; 

I tried to do it with:

    int i;
    int m[6];
    sscanf(para.mac, "%x%x%x%x%x%x", &m[0], &m[1], &m[2], &m[3], &m[4], &m[5]);

    for(i=0;i<6;i++)
      printf("%i  \r\n",m[i]);

but it seems doesn't working.