/* Code snippet showing how I initialize the registers */

          Serial3.end();
     // Setup our USART3

     USART3->regs->BRR = 0x120; // Baud Rate Register
     USART3->regs->CR1 = 0b0010000000001100;  // CR 1
     USART3->regs->CR2 = 0b0010000000100000; // CR 2
     USART3->regs->CR3 = 0x0000; // CR 3

/* End snip */

/* Code snippet showing my IRQ handler */



void __irq_usart3(void) {

  if((USART3->regs->SR & 0x0002) == 0x0002)  // Detects FE
    {
        //digitalWrite(33,HIGH);
        i = USART3->regs->DR;
        current_slot = 0;
        //waiting_for_break = 0;
          slots_loc = 0;
        //SerialUSB.print("B");
    }
  else if(current_slot <= DIMMERS)
  {

    //SerialUSB.println(current_slot);
    if((USART3->regs->SR & 0x0020) == 0x0020)
    {
      //SerialUSB.print("s");
      if(current_slot == 0)
      {

        if(USART3->regs->DR == 0x00)
        {
          slots[current_slot] = USART3->regs->DR;
          needs_write = 1;
        }
        digitalWrite(33,LOW);
      }
      else
      {
        slots[current_slot] = USART3->regs->DR;
      }

      current_slot++;
    }
  }


}