67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
/***************************************************************************
|
|
* Copyright (C) 2006 by Magnus Lundin *
|
|
* lundin@mlu.mine.nu *
|
|
* *
|
|
* Copyright (C) 2008 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. *
|
|
* *
|
|
* You should have received a copy of the GNU General Public License *
|
|
* along with this program; if not, write to the *
|
|
* Free Software Foundation, Inc., *
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
***************************************************************************/
|
|
|
|
.text
|
|
.syntax unified
|
|
.cpu cortex-m3
|
|
.thumb
|
|
.thumb_func
|
|
.align 2
|
|
|
|
/*
|
|
Call with :
|
|
r0 = buffer address
|
|
r1 = destination address
|
|
r2 = bytecount (in) - endaddr (work)
|
|
|
|
Used registers:
|
|
r3 = pFLASH_CTRL_BASE
|
|
r4 = FLASHWRITECMD
|
|
r5 = #1
|
|
r6 = bytes written
|
|
r7 = temp reg
|
|
*/
|
|
|
|
write:
|
|
ldr r3,pFLASH_CTRL_BASE
|
|
ldr r4,FLASHWRITECMD
|
|
movs r5, 1
|
|
movs r6, #0
|
|
mainloop:
|
|
str r1, [r3, #0]
|
|
ldr r7, [r0, r6]
|
|
str r7, [r3, #4]
|
|
str r4, [r3, #8]
|
|
waitloop:
|
|
ldr r7, [r3, #8]
|
|
tst r7, r5
|
|
bne waitloop
|
|
adds r1, r1, #4
|
|
adds r6, r6, #4
|
|
cmp r6, r2
|
|
bne mainloop
|
|
bkpt #0
|
|
|
|
pFLASH_CTRL_BASE: .word 0x400FD000
|
|
FLASHWRITECMD: .word 0xA4420001
|