git.gag.com Git - fw/stlink/blob - stm32f4lv.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     lsls    r2, r2, #2
  12     ldr     r3, flash_base
  13 next:
  14     cbz     r2, done
  15     ldrb    r4, [r0]
  16     strb    r4, [r1]
  17
  18 wait:
  19     ldrh    r4, [r3, #0x0e]
  20     tst.w   r4, #1
  21     bne     wait
  22
  23     add     r0, #1
  24     add     r1, #1
  25     sub     r2, #1
  26     b       next
  27 done:
  28     bkpt
  29
  30 .align 2
  31
  32 flash_base:
  33         .word 0x40023c00