diff options
Diffstat (limited to 'contrib/loaders/flash/stm32lx.S')
| -rw-r--r-- | contrib/loaders/flash/stm32lx.S | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/contrib/loaders/flash/stm32lx.S b/contrib/loaders/flash/stm32lx.S index 88deed32..8f9fd0b2 100644 --- a/contrib/loaders/flash/stm32lx.S +++ b/contrib/loaders/flash/stm32lx.S @@ -8,6 +8,9 @@ * 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 * @@ -28,7 +31,7 @@ // Build : arm-eabi-gcc -c stm32lx.S .text .syntax unified - .cpu cortex-m3 + .cpu cortex-m0 .thumb .thumb_func .global write @@ -39,24 +42,21 @@ r2 - count */ - // Set 0 to r3 - movs r3, #0 + // r2 = source + count * 4 + lsls r2, r2, #2 + adds r2, r1, r2 // Go to compare - b.n test_done - + b 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 - + // 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 r3 and r2 - cmp r3, r2 - // Loop if not zero - bcc.n write_word + // compare r1 and r2 + cmp r1, r2 + // loop if not equal + bne write_word // Set breakpoint to exit bkpt #0x00 |