int main()
{
 8000de0:	e92d 47f0 	stmdb	sp!, {r4, r5, r6, r7, r8, r9, sl, lr}
 8000de4:	b082      	sub	sp, #8
    init_clock();
 8000de6:	f7ff ff5d 	bl	8000ca4 <init_clock>
    init_io();
 8000dea:	f7ff ffad 	bl	8000d48 <init_io>

    // Initialize the timer for 1 ms intervals
    SysTick_Config(SystemCoreClock/1000);
 8000dee:	4b26      	ldr	r3, [pc, #152]	; (8000e88 <main+0xa8>)
 8000df0:	681b      	ldr	r3, [r3, #0]
 8000df2:	4a26      	ldr	r2, [pc, #152]	; (8000e8c <main+0xac>)
 8000df4:	fba2 2303 	umull	r2, r3, r2, r3
 8000df8:	099b      	lsrs	r3, r3, #6
           function <b>SysTick_Config</b> is not included. In this case, the file <b><i>device</i>.h</b>
           must contain a vendor-specific implementation of this function.
 */
__STATIC_INLINE uint32_t SysTick_Config(uint32_t ticks)
{
  if ((ticks - 1UL) > SysTick_LOAD_RELOAD_Msk)
 8000dfa:	3b01      	subs	r3, #1
 8000dfc:	f1b3 7f80 	cmp.w	r3, #16777216	; 0x1000000
 8000e00:	d209      	bcs.n	8000e16 <main+0x36>
  {
    return (1UL);                                                   /* Reload value impossible */
  }

  SysTick->LOAD  = (uint32_t)(ticks - 1UL);                         /* set reload register */
 8000e02:	4a23      	ldr	r2, [pc, #140]	; (8000e90 <main+0xb0>)
 8000e04:	6053      	str	r3, [r2, #4]
    SCB->SHP[(((uint32_t)(int32_t)IRQn) & 0xFUL)-4UL] = (uint8_t)((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL);
 8000e06:	4b23      	ldr	r3, [pc, #140]	; (8000e94 <main+0xb4>)
 8000e08:	21f0      	movs	r1, #240	; 0xf0
 8000e0a:	f883 1023 	strb.w	r1, [r3, #35]	; 0x23
  NVIC_SetPriority (SysTick_IRQn, (1UL << __NVIC_PRIO_BITS) - 1UL); /* set Priority for Systick Interrupt */
  SysTick->VAL   = 0UL;                                             /* Load the SysTick Counter Value */
 8000e0e:	2300      	movs	r3, #0
 8000e10:	6093      	str	r3, [r2, #8]
  SysTick->CTRL  = SysTick_CTRL_CLKSOURCE_Msk |
 8000e12:	2307      	movs	r3, #7
 8000e14:	6013      	str	r3, [r2, #0]

    printf("Start\n");
 8000e16:	4820      	ldr	r0, [pc, #128]	; (8000e98 <main+0xb8>)
 8000e18:	f000 fdae 	bl	8001978 <puts>
    delay_ms(100);
 8000e1c:	2064      	movs	r0, #100	; 0x64
 8000e1e:	f7ff ff23 	bl	8000c68 <delay_ms>

    while (1)
    {
        // LED an
        WRITE_REG(GPIOA->BSRR, GPIO_BSRR_BS_5);
 8000e22:	f04f 4890 	mov.w	r8, #1207959552	; 0x48000000
 8000e26:	f04f 0a20 	mov.w	sl, #32

        uint32_t start=systick_count;
 8000e2a:	4d1c      	ldr	r5, [pc, #112]	; (8000e9c <main+0xbc>)
        float f=1.0;
        for (int i=0; i<10000; i++)
        {
             f=f*1.001;
 8000e2c:	a714      	add	r7, pc, #80	; (adr r7, 8000e80 <main+0xa0>)
 8000e2e:	e9d7 6700 	ldrd	r6, r7, [r7]
 8000e32:	e012      	b.n	8000e5a <main+0x7a>
             //if (f>100000.0)
             //{
             //    f=1.0;
             //}
        }
        printf("f=%f, duration=%ld ms\n",f, systick_count-start);
 8000e34:	682c      	ldr	r4, [r5, #0]
 8000e36:	f7ff fb8f 	bl	8000558 <__aeabi_f2d>
 8000e3a:	eba4 0409 	sub.w	r4, r4, r9
 8000e3e:	9400      	str	r4, [sp, #0]
 8000e40:	4602      	mov	r2, r0
 8000e42:	460b      	mov	r3, r1
 8000e44:	4816      	ldr	r0, [pc, #88]	; (8000ea0 <main+0xc0>)
 8000e46:	f000 fd23 	bl	8001890 <iprintf>

        // LED aus
        WRITE_REG(GPIOA->BSRR, GPIO_BSRR_BR_5);
 8000e4a:	f44f 1300 	mov.w	r3, #2097152	; 0x200000
 8000e4e:	f8c8 3018 	str.w	r3, [r8, #24]
        delay_ms(500);
 8000e52:	f44f 70fa 	mov.w	r0, #500	; 0x1f4
 8000e56:	f7ff ff07 	bl	8000c68 <delay_ms>
        WRITE_REG(GPIOA->BSRR, GPIO_BSRR_BS_5);
 8000e5a:	f8c8 a018 	str.w	sl, [r8, #24]
        uint32_t start=systick_count;
 8000e5e:	f8d5 9000 	ldr.w	r9, [r5]
 8000e62:	f242 7410 	movw	r4, #10000	; 0x2710
        float f=1.0;
 8000e66:	f04f 507e 	mov.w	r0, #1065353216	; 0x3f800000
             f=f*1.001;
 8000e6a:	f7ff fb75 	bl	8000558 <__aeabi_f2d>
 8000e6e:	4632      	mov	r2, r6
 8000e70:	463b      	mov	r3, r7
 8000e72:	f7ff fbc9 	bl	8000608 <__aeabi_dmul>
 8000e76:	f7ff fe9f 	bl	8000bb8 <__aeabi_d2f>
        for (int i=0; i<10000; i++)
 8000e7a:	3c01      	subs	r4, #1
 8000e7c:	d1f5      	bne.n	8000e6a <main+0x8a>
 8000e7e:	e7d9      	b.n	8000e34 <main+0x54>
 8000e80:	9374bc6a 	.word	0x9374bc6a
 8000e84:	3ff00418 	.word	0x3ff00418
 8000e88:	20000000 	.word	0x20000000
 8000e8c:	10624dd3 	.word	0x10624dd3
 8000e90:	e000e010 	.word	0xe000e010
 8000e94:	e000ed00 	.word	0xe000ed00
 8000e98:	08003708 	.word	0x08003708
 8000e9c:	200001f0 	.word	0x200001f0
 8000ea0:	08003710 	.word	0x08003710

08000ea4 <_read>:
	_kill(status, -1);
	while (1) {}		/* Make sure we hang here */
}

__attribute__((weak)) int _read(int file, char *ptr, int len)
{
 8000ea4:	b570      	push	{r4, r5, r6, lr}
	int DataIdx;

	for (DataIdx = 0; DataIdx < len; DataIdx++)
 8000ea6:	1e16      	subs	r6, r2, #0
 8000ea8:	dd07      	ble.n	8000eba <_read+0x16>
 8000eaa:	460c      	mov	r4, r1
 8000eac:	198d      	adds	r5, r1, r6
	{
		*ptr++ = __io_getchar();
 8000eae:	f3af 8000 	nop.w
 8000eb2:	f804 0b01 	strb.w	r0, [r4], #1
	for (DataIdx = 0; DataIdx < len; DataIdx++)
 8000eb6:	42a5      	cmp	r5, r4
 8000eb8:	d1f9      	bne.n	8000eae <_read+0xa>
	}

return len;
}