git.gag.com Git - fw/stlink/blob - flashloaders/stm32f4.s

   1 .global start
   2 .syntax unified
   3
   4 @ r0 = source
   5 @ r1 = target
   6 @ r2 = wordcount
   7 @ r3 = flash_base
   8 @ r4 = temp
   9
  10 start:
  11         ldr r3, flash_base
  12 next:
  13         cbz r2, done
  14         ldr r4, [r0]
  15         str r4, [r1]
  16
  17 wait:
  18         ldrh r4, [r3, #0x0e]
  19         tst.w r4, #1
  20         bne wait
  21
  22         add r0, #4
  23         add r1, #4
  24         sub r2, #1
  25         b next
  26 done:
  27         bkpt
  28
  29 .align 2
  30
  31 flash_base:
  32         .word 0x40023c00