改S文件

libraries/STM32F4xx_HAL/CMSIS/Device/ST/STM32F4xx/Source/Templates/gcc/startup_stm32f407xx.s

@@ -62,40 +62,67 @@ Reset_Handler:
   ldr   sp, =_estack     /* set stack pointer */
 
 /* Copy the data segment initializers from flash to SRAM */  
-  ldr r0, =_sdata
+  movs  r1, #0
-  ldr r1, =_edata
+  b  LoopCopyDataInit
-  ldr r2, =_sidata
-  movs r3, #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
+
+/* Copy from flash to CCMRAM */
+  ldr r0, =_sccmdata
+  ldr r1, =_eccmdata
+  ldr r2, =_siccmdata
+  movs r3, #0
+  b LoopCopyCcmInit
+CopyCcmInit:
   ldr r4, [r2, r3]
   str r4, [r0, r3]
   adds r3, r3, #4
-
+LoopCopyCcmInit:
-LoopCopyDataInit:
   adds r4, r0, r3
   cmp r4, r1
-  bcc CopyDataInit
+  bcc CopyCcmInit
+/* End of copy to CCMRAM */
 
+  ldr  r2, =_sccm_bss
+  b  LoopFillZeroCcm
+/* Zero fill the ccm bss segment. */  
+FillZeroCcm:
+  movs  r3, #0
+  str  r3, [r2], #4
+    
+LoopFillZeroCcm:
+  ldr  r3, = _eccm_bss
+  cmp  r2, r3
+  bcc  FillZeroCcm
+/* End of zero fill to CCMRAM */
+
+  ldr  r2, =_sbss
+  b  LoopFillZerobss
 /* Zero fill the bss segment. */  
-  ldr r2, =_sbss
-  ldr r4, =_ebss
-  movs r3, #0
-  b LoopFillZerobss
-
 FillZerobss:
-  str  r3, [r2]
+  movs  r3, #0
-  adds r2, r2, #4
+  str  r3, [r2], #4
     
 LoopFillZerobss:
-  cmp r2, r4
+  ldr  r3, = _ebss
-  bcc FillZerobss
+  cmp  r2, r3
+  bcc  FillZerobss
 
 /* Call the clock system intitialization function.*/
   bl  SystemInit   
 /* Call static constructors */
-    bl __libc_init_array
+/*     bl __libc_init_array */
 /* Call the application's entry point.*/
   bl  entry
   bx  lr