unsigned char str[100];
unsigned char tempbuf[800];
unsigned char buf[10];
unsigned char rezult[100];
int i,j,k;
unsigned long l;

strcpy(str,"Bugtrack for guru!!!!");
for(i=0;*(str+i)!=0;i++)
{
    itoa(*(str+i),buf,2);
    for(j=0;j<8-strlen(buf);j++)
      strcat(tempbuf,"0");
    strcat(tempbuf,buf);
}
for(i=0,j=0,buf[7]=0;*(tempbuf+i)!=0;i+=7,j++)
{
     memmove(buf,tempbuf+i,7);
     rez[j]=(unsigned char )strtoul(buf,0,2);
}