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/***************************************************************************
* Copyright (C) 2014 by Jeff Ciesielski *
* jeffciesielski@gmail.com *
* *
* Based on the armv7m erase checker by: *
* Copyright (C) 2010 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program 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 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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. *
* *
***************************************************************************/
/*
parameters:
r0 - address in
r1 - byte count
r2 - mask - result out
*/
.text
.syntax unified
.cpu cortex-m0
.thumb
.thumb_func
.align 2
loop:
ldrb r3, [r0]
adds r0, #1
orrs r2, r2, r3
subs r1, r1, #1
bne loop
end:
bkpt #0
.end
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