void slowSPIwrite(uint8_t d) {
 for (int8_t i=7; i>=0; i--) {
   P3OUT &= ~BIT3;  //set clk low
   if (d & (1<<i) ) {
     P3OUT |= BIT1; // if 1 set
   } else {
     P3OUT &= ~BIT1; // if 0 res
   }
   P3OUT |= BIT3;   // set clock hi then reset
 }
}