diff --git a/bsp/avr32uc3b0/application.c b/bsp/avr32uc3b0/application.c
index 35c7c8a588..57679ffc2d 100644
--- a/bsp/avr32uc3b0/application.c
+++ b/bsp/avr32uc3b0/application.c
@@ -18,13 +18,9 @@ static void rt_thread_entry_led1(void* parameter)
 {
     while (1)
     {
-        /* led on */
-        //rt_kprintf("LED1 on\r\n");
         gpio_tgl_gpio_pin(AVR32_PIN_PA08);
         rt_thread_delay(RT_TICK_PER_SECOND / 2); /* sleep 0.5 second and switch to other thread */
 
-        /* led off */
-        //rt_kprintf("LED1 off\r\n");
         gpio_tgl_gpio_pin(AVR32_PIN_PA08);
         rt_thread_delay(RT_TICK_PER_SECOND / 2);
     }
@@ -36,13 +32,9 @@ void rt_thread_entry_led2(void* parameter)
 {
     while (1)
     {
-        /* led on */
-        //rt_kprintf("LED2 on");
         gpio_tgl_gpio_pin(AVR32_PIN_PA07);
         rt_thread_delay(RT_TICK_PER_SECOND);
 
-        /* led off */
-        //rt_kprintf("LED2 off\r\n");
         gpio_tgl_gpio_pin(AVR32_PIN_PA07);
         rt_thread_delay(RT_TICK_PER_SECOND);
     }