avr: updated flash procedure code.

avr/modules/flash/bootloader2.asm

@@ -0,0 +1,81 @@
+; ***************************************************************************
+; 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
+
+