diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
index 46b70e2a571d1ff0f75858f71045f92aea6479be..a5df7b97c5f65f4ea9f48ae4a2bc23456330d164 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
@@ -278,9 +278,10 @@ static rt_err_t drv_pwm_set(TIM_HandleTypeDef *htim, struct rt_pwm_configuration
     {
         pulse = MIN_PULSE;
     }
-    else if (pulse > period)
+    /*To determine user input, output high level is required*/
+    else if (pulse >= period)
     {
-        pulse = period;
+        pulse = period + 1;
     }
     __HAL_TIM_SET_COMPARE(htim, channel, pulse - 1);