; ***************************************************************************
; copyright   : (C) 2026 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.   *
; ***************************************************************************

#ifndef AQH_AVR_NETWORK_MSG_PONG_W_ASM
#define AQH_AVR_NETWORK_MSG_PONG_W_ASM



; ---------------------------------------------------------------------------
; @routine NETMSG_Pong_Write @global
;
; @param  R16 dest addr
; @param Y pointer to device to write msg for and to
; @param X pointer to buffer to write to
; @clobbers R16 (R17, R18, R19, R20, R21, Z)

NETMSG_Pong_Write:
  st X+, r16                            ; dest address
  ldi r16, 6                            ; msg code+src address+4 payload bytes
  st X+, r16                            ; msg len
  ldi r16, NETMSG_CMD_PONG
  st X+, r16                            ; msg code
  ldd r16, Y+NET_IFACE_OFFS_ADDRESS
  st X+, r16                            ; src address
  bigcall NETMSG_Common_AddUidToBuffer  ; (R16, R18, R19, R20, R21)

  sbiw xh:xl, 8 ; go back to beginning of message (1 byte dst addr, 1 byte length, 6 bytes payload)
  bigcall NETMSG_CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
  sbiw xh:xl, 9 ; go back to beginning of message (1 byte dst addr, 1 byte length, 6 bytes payload, 1 byte crc)
  ret
; @end



#endif