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Diffstat (limited to 'contrib/loaders/flash/stm32/stm32lx.S')
| -rw-r--r-- | contrib/loaders/flash/stm32/stm32lx.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/loaders/flash/stm32/stm32lx.S b/contrib/loaders/flash/stm32/stm32lx.S new file mode 100644 index 00000000..bcae7a46 --- /dev/null +++ b/contrib/loaders/flash/stm32/stm32lx.S @@ -0,0 +1,63 @@ +/*************************************************************************** + * Copyright (C) 2010 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * Copyright (C) 2011 Øyvind Harboe * + * oyvind.harboe@zylin.com * + * * + * Copyright (C) 2011 Clement Burin des Roziers * + * clement.burin-des-roziers@hikob.com * + * * + * Copyright (C) 2017 Armin van der Togt * + * armin@otheruse.nl * + * * + * 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., * + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * + ***************************************************************************/ + + + .text + .syntax unified + .cpu cortex-m0 + .thumb + +/* + r0 - destination address + r1 - source address + r2 - count +*/ + + .thumb_func + .global _start +_start: + // r2 = source + count * 4 + lsls r2, r2, #2 + adds r2, r1, r2 + // Go to compare + b test_done +write_word: + // load word from address in r1 and increase r1 by 4 + ldmia r1!, {r3} + // store word to address in r0 and increase r0 by 4 + stmia r0!, {r3} +test_done: + // compare r1 and r2 + cmp r1, r2 + // loop if not equal + bne write_word + + // Set breakpoint to exit + bkpt #0x00 + |