关于官方的stm32L475VETx的SDK包编译下载不能使用的问题

发布于 2022-07-15 11:52:30 浏览：470 订阅该版

````c
Reset_Handler:
  ldr   sp, =_estack    /* Set stack pointer */

/* Call the clock system initialization function.*/
    bl  SystemInit

/* Copy the data segment initializers from flash to SRAM */
  movs	r1, #0
  b	LoopCopyDataInit

CopyDataInit:
	ldr	r3, =_sidata
	ldr	r3, [r3, r1]
	str	r3, [r0, r1]
	adds	r1, r1, #4

LoopCopyDataInit:
	ldr	r0, =_sdata
	ldr	r3, =_edata
	adds	r2, r0, r1
	cmp	r2, r3
	bcc	CopyDataInit
	ldr	r2, =_sbss
	b	LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
	movs	r3, #0
	str	r3, [r2], #4

LoopFillZerobss:
	ldr	r3, = _ebss
	cmp	r2, r3
	bcc	FillZerobss

/* Call static constructors */
//死在这个地方
    bl __libc_init_array
/* Call the application's entry point.*/
	bl	entry

````

原因是初始化没有分配相应的init段，需要更改lds文件，修改如下

```c
.text :
    {
        . = ALIGN(4);
        _stext = .;
        KEEP(*(.isr_vector))            /* Startup code */
		/*添加这里的两句
        KEEP(*(.init))
        KEEP(*(.fini))
		/*添加上面两句
        . = ALIGN(4);
        *(.text)                        /* remaining code */
        *(.text.*)                      /* remaining code */
        *(.rodata)                      /* read-only data (constants) */
        *(.rodata*)
        *(.glue_7)
        *(.glue_7t)
        *(.gnu.linkonce.t*)

```