From 6fdf64f3b39f03e809b80ddeee6256555146d0ae Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Tue, 2 Jul 2013 02:35:27 +0000 Subject: added very basic version for bootloader and downloader git-svn-id: https://svn.spreadspace.org/pic/trunk@15 a09c6847-51d9-44de-8ef2-e725cf50f3c7 --- bootloader/bootloader.asm | 61 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 bootloader/bootloader.asm (limited to 'bootloader/bootloader.asm') diff --git a/bootloader/bootloader.asm b/bootloader/bootloader.asm new file mode 100644 index 0000000..eacc30b --- /dev/null +++ b/bootloader/bootloader.asm @@ -0,0 +1,61 @@ + ;; + ;; spreadspace pic utils + ;; + ;; + ;; Copyright (C) 2011 Christian Pointner + ;; + ;; 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 . + ;; + ;; ------------------------------------- + ;; PREAMBLE + + LIST p=16F887 + include "p16f887.inc" + ;; __config _CONFIG1, _DEBUG_OFF & _LVP_OFF & _FCMEN_OFF & _IESO_OFF & _BOR_OFF & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_OFF & _WDT_OFF & _XT_OSC + ;; __config _CONFIG2, _BOR21V & _WRT_256 + + ;; ------------------------------------- + ;; DEFINES +#define BOOTPIN PORTC,7 +USERVECT EQU H'100' +ISRVECT EQU USERVECT + H'4' + + ;; ------------------------------------- + ;; Boot test + org 0 + btfsc BOOTPIN + goto USERVECT + goto boot + org 4 + + ;; ------------------------------------- + ;; goto user ISR +isr + goto ISRVECT + + ;; ------------------------------------- + ;; Bootloader +boot + goto USERVECT + + ;; ------------------------------------- + ;; dummy user code + org USERVECT + goto USERVECT + + ;; ------------------------------------- + ;; END + end -- cgit v1.2.3