diff options
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/loaders/flash/stm32/stm32lx.S | 53 | ||||
| -rw-r--r-- | contrib/loaders/flash/stm32/stm32lx.inc | 3 |
2 files changed, 37 insertions, 19 deletions
diff --git a/contrib/loaders/flash/stm32/stm32lx.S b/contrib/loaders/flash/stm32/stm32lx.S index bcae7a4..7cfe485 100644 --- a/contrib/loaders/flash/stm32/stm32lx.S +++ b/contrib/loaders/flash/stm32/stm32lx.S @@ -20,44 +20,61 @@ * 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 /* +Parameters r0 - destination address r1 - source address - r2 - count + r2 - half pages + r3 - bytes per half page + r4 - flash base +Variables + r0 - destination write pointer + r1 - source read pointer + r2 - source limit address + r3 - bytes per half page + r4 - flash base + r5 - pages left in current half page + r6 - temporary r/w */ +/* offsets of registers from flash reg base */ +#define STM32_FLASH_SR_OFFSET 0x18 + .thumb_func .global _start _start: - // r2 = source + count * 4 - lsls r2, r2, #2 - adds r2, r1, r2 + // r2 = source + half pages * bytes per half page + muls r2, r2, r3 + add r2, r1, r2 // Go to compare - b test_done + b test_done +write_half_page: + // initialize pages left in current half page + mov r5, r3 write_word: // load word from address in r1 and increase r1 by 4 - ldmia r1!, {r3} + ldmia r1!, {r6} // store word to address in r0 and increase r0 by 4 - stmia r0!, {r3} + stmia r0!, {r6} + // check for end of half page + subs r5, r5, #4 + bne write_word +wait_busy: + // read status register into r6, loop while bottom bit is set + ldr r6, [r4, #STM32_FLASH_SR_OFFSET] + lsls r6, r6, #31 + bne wait_busy test_done: - // compare r1 and r2 + // compare r1 and r2, loop if not equal cmp r1, r2 - // loop if not equal - bne write_word + bne write_half_page // Set breakpoint to exit - bkpt #0x00 - + bkpt #0x00 diff --git a/contrib/loaders/flash/stm32/stm32lx.inc b/contrib/loaders/flash/stm32/stm32lx.inc index eaaf184..668de27 100644 --- a/contrib/loaders/flash/stm32/stm32lx.inc +++ b/contrib/loaders/flash/stm32/stm32lx.inc @@ -1,2 +1,3 @@ /* Autogenerated with ../../../../src/helper/bin2char.sh */ -0x92,0x00,0x8a,0x18,0x01,0xe0,0x08,0xc9,0x08,0xc0,0x91,0x42,0xfb,0xd1,0x00,0xbe, +0x5a,0x43,0x0a,0x44,0x07,0xe0,0x1d,0x46,0x40,0xc9,0x40,0xc0,0x04,0x3d,0xfb,0xd1, +0xa6,0x69,0xf6,0x07,0xfc,0xd1,0x91,0x42,0xf5,0xd1,0x00,0xbe, |