diff options
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/loaders/flash/stm32lx.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/loaders/flash/stm32lx.S b/contrib/loaders/flash/stm32lx.S new file mode 100644 index 00000000..6e8ccb08 --- /dev/null +++ b/contrib/loaders/flash/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 * + * * + * 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. * + ***************************************************************************/ + + +// Build : arm-eabi-gcc -c stm32lx.S + .text + .syntax unified + .cpu cortex-m3 + .thumb + .thumb_func + .global write + +/* + r0 - destination address + r1 - source address + r2 - count +*/ + + // Set 0 to r3 + movs r3, #0 + // Go to compare + b.n test_done + +write_word: + // Load one word from address in r0, increment by 4 + ldr.w ip, [r1], #4 + // Store the word to address in r1, increment by 4 + str.w ip, [r0], #4 + // Increment r3 + adds r3, #1 + +test_done: + // Compare r3 and r2 + cmp r3, r2 + // Loop if not zero + bcc.n write_word + + // Set breakpoint to exit + bkpt #0x00 + |