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Код: Выделить всё

   1              	
   2              	.thumb
   3              	
   4              	@ Register addresses from STM32F0 reference manual
   5              	.equ PERIPH_BASE,           (0x40000000)
   6              	.equ AHBPERIPH_BASE,        (PERIPH_BASE + 0x00020000)
   7              	.equ AHB2PERIPH_BASE,		(PERIPH_BASE + 0x08000000)
   8              	
   9              	.equ RCC_BASE ,             (AHBPERIPH_BASE + 0x00001000)
  10              	.equ GPIOC_BASE, 			(AHB2PERIPH_BASE + 0x00000800)
  11              	
  12              	@ Make start function global so the linker can see it later
  13              	.global _start
  14              	
  15              	@ Vector table
  16 0000 00100020 	.word               0x20001000		@ Vector #0 - Stack pointer init value (0x20000000 is RAM address a
  17 0004 00000000 	.word               _start			@ Vector #1 - Reset vector - where the code begins
  18              										@ Vector #3..#n - I don't use Systick and another interrupts right now
  19              										@				so it is not necessary to define them and code can start here
  20              	
  21              	.thumb_func				@ Force the assembler to call this function in Thumb mode, that means the least sign
  22              							@ Using this bit, the ARM core knows whether is jumping to the ARM or Thumb code, Cortex supp
  23              							@ Also you can use ".type	_start, %function"
  24              	_start:
  25              	
  26              	    @ Enable clock for GPIOC peripheral in RCC registers
  27 0008 0D48     	    LDR r0, =(RCC_BASE + 0x14)
  28 000a 4FF40021 	    LDR r1, =(1 << 19)
  29 000e 0160     	    STR r1, [r0]     @Store R0 value to r1
  30              	   
  31              	    @ Enable GPIOC pin 9 as output
  32 0010 0C48     	    LDR r0, =(GPIOC_BASE + 0x00)
  33 0012 4FF48021 	    LDR r1, =(1 << (9*2))	@ Every bin has 2 bit settings, hence *2
  34 0016 0160     	    STR r1, [r0]     @Store R0 value to r1
  35              	   
  36              	
  37              	loop:
  38              	
  39              	    @ Write high to pin PC9
  40 0018 0B48     	    LDR r0, =(GPIOC_BASE + 0x14)
  41 001a 4FF40071 	    LDR r1, =(1 << 9)
  42 001e 0160     	    STR r1, [r0]     @Store R1 value to address pointed by R0
  43              	
  44 0020 00F007F8 	    BL	Delay   
  45              	   
  46              	    @ Write low to PC9
  47 0024 0848     	    LDR r0, =(GPIOC_BASE + 0x14)
  48 0026 4FF00001 	    LDR r1, =(0)
  49 002a 0160     	    STR r1, [r0]     @Store R1 value to address pointed by R0
  50              	
  51 002c 00F001F8 	    BL  Delay
  52              	   
  53 0030 F2E7     	b loop
  54              	   
  55              	Delay:
  56              	    @ Dummy counter to slow down my loop
  57 0032 4FF00000 	    LDR R0, =0
  58 0036 0549     	    LDR R1, =200000
  59              	loop0:
  60 0038 0130     	    ADD R0, R0, #1
  61 003a 8842     	    cmp R0, R1
  62 003c FCD1     	    bne loop0
  63              		
  64 003e 7047     		BX  LR
  65              	
  66 0040 14100240 	
  66      00080048 
  66      14080048 
  66      400D0300 

DEFINED SYMBOLS
              main.S:5      *ABS*:40000000 PERIPH_BASE
              main.S:6      *ABS*:40020000 AHBPERIPH_BASE
              main.S:7      *ABS*:48000000 AHB2PERIPH_BASE
              main.S:9      *ABS*:40021000 RCC_BASE
              main.S:10     *ABS*:48000800 GPIOC_BASE
              main.S:24     .text:00000008 _start
                            .text:00000000 $d
              main.S:27     .text:00000008 $t
              main.S:37     .text:00000018 loop
              main.S:55     .text:00000032 Delay
              main.S:59     .text:00000038 loop0
              main.S:66     .text:00000040 $d

NO UNDEFINED SYMBOLS