; ***************************************************************************
; copyright   : (C) 2025 by Martin Preuss
; email       : martin@libchipcard.de
;
; ***************************************************************************
; * This file is part of the project "AqHome".                              *
; * Please see toplevel file COPYING of that project for license details.   *
; ***************************************************************************




.cseg



; ---------------------------------------------------------------------------
; @routine UART_HW_Uart1_Init @global
;
; @param Y pointer to interface data in SRAM (see @ref UART_HW_IFACE_OFFS_STATE)
; @clobbers R16, R17, X

UART_HW_Uart1_Init:
  rcall UART_HW_InitInterface

  ; set baudrate
.if clock == 8000000
  ldi r16, 25 ; (19.2Kb/s at 8MHz)
  ldi r17, 0
.endif

.if clock == 1000000
  ldi r16, 2  ; (19.2Kb/s at 1MHz)
  ldi r17, 0  
.endif

  out UBRR1H, r17
  out UBRR1L, r16

  ; set character format 
  ldi r16, (1<<USBS1)|(3<<UCSZ10)
  out UCSR1C, r16

  ret
; @end