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



; ***************************************************************************
; data


.dseg

flashDataBegin:
  flashUid:         .byte 4
  flashSendBuffer:  .byte 32
  flashRecvBuffer:  .byte FLASH_RECVBUFFER_MAXLEN
flashDataEnd:




; ***************************************************************************
; code


.cseg



FLASH_PROTO_BEGIN:




bootLoader:
;  rcall watchdogOff        ; turn off watchdog timer (sometimes it stays on after reboot)

  sbi LED_DDR, LED_PINNUM  ; out
  cbi LED_PORT, LED_PINNUM ; on
  ldi r16, 30
  rcall flashWaitForMulti100ms
  rcall flashReadUidIntoSdram               ; R16, X, Y
  rcall checkFlash                          ; (r16, r17, r18, r19, r20, r22, x, y, z)
  brcc bootLoader_startFirmware             ; no flash process, try to start installed firmware
  rcall flashProcess                        ; received a FLASH START msg, handle flashing
  brcc bootLoader_waitAndRestartBootLoader
  ; try to start firmware
bootLoader_startFirmware:
  cbi LED_PORT, LED_PINNUM         ; on
  rjmp firmwareStart
bootLoader_waitAndRestartBootLoader:
  sbi LED_PORT, LED_PINNUM         ; off
  ldi r16, 20
  rcall flashWaitForMulti100ms
  rjmp bootLoader



bootClcRet:
  clc
bootRet:
  ret

bootSecRet:
  sec
  ret






FLASH_PROTO_END:
.equ MODULE_SIZE_FLASH_PROTO = FLASH_PROTO_END-FLASH_PROTO_BEGIN