67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
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/***************************************************************************
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* Copyright (C) 2006 by Magnus Lundin *
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* lundin@mlu.mine.nu *
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* *
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* Copyright (C) 2008 by Spencer Oliver *
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* spen@spen-soft.co.uk *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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.text
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.syntax unified
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.cpu cortex-m3
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.thumb
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.thumb_func
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.align 2
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/*
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Call with :
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r0 = buffer address
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r1 = destination address
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r2 = bytecount (in) - endaddr (work)
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Used registers:
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r3 = pFLASH_CTRL_BASE
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r4 = FLASHWRITECMD
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r5 = #1
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r6 = bytes written
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r7 = temp reg
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*/
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write:
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ldr r3,pFLASH_CTRL_BASE
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ldr r4,FLASHWRITECMD
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movs r5, 1
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movs r6, #0
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mainloop:
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str r1, [r3, #0]
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ldr r7, [r0, r6]
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str r7, [r3, #4]
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str r4, [r3, #8]
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waitloop:
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ldr r7, [r3, #8]
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tst r7, r5
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bne waitloop
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adds r1, r1, #4
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adds r6, r6, #4
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cmp r6, r2
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bne mainloop
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bkpt #0
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pFLASH_CTRL_BASE: .word 0x400FD000
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FLASHWRITECMD: .word 0xA4420001
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