53 lines
1.9 KiB
ArmAsm
53 lines
1.9 KiB
ArmAsm
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/***************************************************************************
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* Copyright (C) 2010 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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.arm
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/*
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r0 - source address
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r1 - target address
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r2 - count (halfword-16bit)
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r3 - result
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r4 - temp
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r5 - temp
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*/
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write:
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ldr r4, STM32_FLASH_CR
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ldr r5, STM32_FLASH_SR
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mov r3, #1
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str r3, [r4, #0]
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ldrh r3, [r0], #2
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strh r3, [r1], #2
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busy:
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ldr r3, [r5, #0]
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tst r3, #0x01
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beq busy
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tst r3, #0x14
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bne exit
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subs r2, r2, #1
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bne write
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exit:
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bkpt #0
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STM32_FLASH_CR: .word 0x40022010
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STM32_FLASH_SR: .word 0x4002200C
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