while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */ while (pwmVal< 500) { pwmVal++; __HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_1, pwmVal); //修改比较值,修改占空比// TIM3->CCR1 = pwmVal; 与上方相同 HAL_Delay(1); } while (pwmVal) { pwmVal--; __HAL_TIM_SetCo...