; ***************************************************************************
; 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.   *
; ***************************************************************************



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

NETMSG_Device_Write:
  ldi r16, 0xff
  st X+, r16                          ; dest address
  ldi r16, 18                         ; msg code+src address+12 payload bytes
  st X+, r16                          ; msg len
  ldi r16, NETMSG_CMD_DEVICE
  st X+, r16                          ; msg code
  ldd r16, Y+NET_IFACE_OFFS_ADDRESS
  st X+, r16                          ; src address
  rcall NETMSG_Common_AddUidToBuffer  ; (R16, R18, R19, R20, R21)
  ldi zh, HIGH(devInfoBlock*2)        ; 6-17: devInfoBlock
  ldi zl, LOW(devInfoBlock*2)
  ldi r18, 12
  bigcall Utils_CopyFromFlash           ; (R17, R18, X, Z)
  sbiw xh:xl, 20 ; go back to beginning of message (1 byte dst addr, 1 byte length, 18 bytes payload)
  rcall NETMSG_CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
  sbiw xh:xl, 21 ; go back to beginning of message (1 byte dst addr, 1 byte length, 18 bytes payload, 1 byte crc)
  ret
; @end