diff --git a/components/drivers/cputime/cputime_cortexm.c b/components/drivers/cputime/cputime_cortexm.c
index f576df785ff5231a5d9ba475c66ba4e73ee89de8..99dc8b013e2fda258890cb9279d8cdf3d85ed6ce 100644
--- a/components/drivers/cputime/cputime_cortexm.c
+++ b/components/drivers/cputime/cputime_cortexm.c
@@ -54,6 +54,9 @@ int cortexm_cputime_init(void)
     /* check support bit */
     if ((DWT->CTRL & (1UL << DWT_CTRL_NOCYCCNT_Pos)) == 0) 
     {
+        /* enable trace*/
+        CoreDebug->DEMCR |= (1UL << CoreDebug_DEMCR_TRCENA_Pos);
+        
         /* whether cycle counter not enabled */
         if ((DWT->CTRL & (1UL << DWT_CTRL_CYCCNTENA_Pos)) == 0) 
         {