diff --git a/bsp/ls1bdev/applications/startup.c b/bsp/ls1bdev/applications/startup.c
index 215ed398e..bfd821402 100644
--- a/bsp/ls1bdev/applications/startup.c
+++ b/bsp/ls1bdev/applications/startup.c
@@ -38,49 +38,49 @@ extern void irq_exception(void);
  */
 void rtthread_startup(void)
 {
-	/* disable interrupt first */
-	rt_hw_interrupt_disable();
+    /* disable interrupt first */
+    rt_hw_interrupt_disable();
 
-	/* init cache */
-	rt_hw_cache_init();
-	/* init hardware interrupt */
-	rt_hw_interrupt_init();
+    /* init cache */
+    rt_hw_cache_init();
+    /* init hardware interrupt */
+    rt_hw_interrupt_init();
 
-	/* copy vector */
-	memcpy((void *)A_K0BASE, tlb_refill_exception, 0x20);
-	memcpy((void *)(A_K0BASE + 0x180), general_exception, 0x20);
-	memcpy((void *)(A_K0BASE + 0x200), irq_exception, 0x20);
+    /* copy vector */
+    rt_memcpy((void *)A_K0BASE, tlb_refill_exception, 0x20);
+    rt_memcpy((void *)(A_K0BASE + 0x180), general_exception, 0x20);
+    rt_memcpy((void *)(A_K0BASE + 0x200), irq_exception, 0x20);
 
-	/* init board */
-	rt_hw_board_init();
+    /* init board */
+    rt_hw_board_init();
 
-	/* show version */
-	rt_show_version();
+    /* show version */
+    rt_show_version();
 
 #ifdef RT_USING_HEAP
-	rt_system_heap_init((void*)&__bss_end, (void*)RT_HW_HEAP_END);
+    rt_system_heap_init((void*)&__bss_end, (void*)RT_HW_HEAP_END);
 #endif
 
-	/* init scheduler system */
-	rt_system_scheduler_init();
+    /* init scheduler system */
+    rt_system_scheduler_init();
 
     /* initialize timer */
     rt_system_timer_init();
 
-	/* initialize timer thread */
-	rt_system_timer_thread_init();
+    /* initialize timer thread */
+    rt_system_timer_thread_init();
 
-	/* init idle thread */
-	rt_thread_idle_init();
+    /* init idle thread */
+    rt_thread_idle_init();
 
-	/* init application */
-	rt_application_init();
+    /* init application */
+    rt_application_init();
 
-	/* start scheduler */
-	rt_system_scheduler_start();
+    /* start scheduler */
+    rt_system_scheduler_start();
 
-	/* never reach here */
-	return;
+    /* never reach here */
+    return;
 }
 
 /*@}*/