diff --git a/bsp/st/driver/drv_pin.c b/bsp/st/driver/drv_pin.c
index 5134b7d..c1c9e30 100644
--- a/bsp/st/driver/drv_pin.c
+++ b/bsp/st/driver/drv_pin.c
@@ -192,7 +192,7 @@ static int drv_pin_configure(struct mr_pin *pin, int number, int mode)
             {
                 HAL_NVIC_DisableIRQ(pin_irq_map[exti_line]);
             }
-        } else
+        } else if ((exti_line >= 10) && (exti_line <= 15))
         {
             if ((pin_irq_mask[10] == -1) &&
                 (pin_irq_mask[11] == -1) &&
diff --git a/bsp/st/driver/drv_pwm.c b/bsp/st/driver/drv_pwm.c
index df58e81..84b4056 100644
--- a/bsp/st/driver/drv_pwm.c
+++ b/bsp/st/driver/drv_pwm.c
@@ -303,7 +303,7 @@ static int drv_pwm_read(struct mr_pwm *pwm, int channel, uint32_t *compare_value
     uint32_t Channel = (channel - 1) << 2;
 
 #ifdef MR_USING_PWM_CHANNEL_CHECK
-    if ((Channel & TIM_CHANNEL_ALL) || (Channel == 0))
+    if (Channel & TIM_CHANNEL_ALL)
     {
         return MR_EINVAL;
     }
@@ -319,7 +319,7 @@ static int drv_pwm_write(struct mr_pwm *pwm, int channel, uint32_t compare_value
     uint32_t Channel = (channel - 1) << 2;
 
 #ifdef MR_USING_PWM_CHANNEL_CHECK
-    if ((Channel & TIM_CHANNEL_ALL) || (Channel == 0))
+    if (Channel & TIM_CHANNEL_ALL)
     {
         return MR_EINVAL;
     }