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|
;;
;; spreadspace pic utils
;;
;;
;; Copyright (C) 2011-2013 Christian Pointner <equinox@spreadspace.org>
;;
;; This file is part of spreadspace pic utils.
;;
;; spreadspace pic utils is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; any later version.
;;
;; spreadspace pic utils is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with spreadspace pic utils. If not, see <http://www.gnu.org/licenses/>.
;;
org .0
bootmacro
;; -------------------------------------
;; goto user ISR
org .4
isr
goto ISRVECT
;; -------------------------------------
;; Bootloader (Generic Subroutines)
send_answer ; generic answer message, leave len of data in W
addlw .3
movwf combuff + .1
decf combuff + .1,w
movwf cnt
movlw combuff
movwf FSR
clrf csum
send_answer_next
movf INDF,w
call com_tx_byte
incf FSR,f
decfsz cnt,f
goto send_answer_next
movf csum,w
call com_tx_byte
return
;; ------------------
ack_cmd ; short answers which only contain return code
movwf combuff + .2
movlw .1
call send_answer
return
|
