diff --git a/CAR.ioc b/CAR.ioc
index eab2f9d..739b210 100644
--- a/CAR.ioc
+++ b/CAR.ioc
@@ -41,16 +41,17 @@ Mcu.CPN=STM32F103C8T6
 Mcu.Family=STM32F1
 Mcu.IP0=ADC1
 Mcu.IP1=DMA
-Mcu.IP10=USART2
+Mcu.IP10=USART1
+Mcu.IP11=USART2
 Mcu.IP2=I2C2
 Mcu.IP3=NVIC
 Mcu.IP4=RCC
 Mcu.IP5=SYS
-Mcu.IP6=TIM2
-Mcu.IP7=TIM3
-Mcu.IP8=TIM4
-Mcu.IP9=USART1
-Mcu.IPNb=11
+Mcu.IP6=TIM1
+Mcu.IP7=TIM2
+Mcu.IP8=TIM3
+Mcu.IP9=TIM4
+Mcu.IPNb=12
 Mcu.Name=STM32F103C(8-B)Tx
 Mcu.Package=LQFP48
 Mcu.Pin0=PD0-OSC_IN
@@ -60,21 +61,22 @@ Mcu.Pin11=PB10
 Mcu.Pin12=PB11
 Mcu.Pin13=PA9
 Mcu.Pin14=PA10
-Mcu.Pin15=PA12
-Mcu.Pin16=PA13
-Mcu.Pin17=PA14
-Mcu.Pin18=PA15
-Mcu.Pin19=PB4
+Mcu.Pin15=PA11
+Mcu.Pin16=PA12
+Mcu.Pin17=PA13
+Mcu.Pin18=PA14
+Mcu.Pin19=PA15
 Mcu.Pin2=PA0-WKUP
-Mcu.Pin20=PB5
-Mcu.Pin21=PB6
-Mcu.Pin22=PB7
-Mcu.Pin23=PB8
-Mcu.Pin24=PB9
-Mcu.Pin25=VP_SYS_VS_Systick
-Mcu.Pin26=VP_TIM2_VS_ClockSourceINT
-Mcu.Pin27=VP_TIM3_VS_ClockSourceINT
-Mcu.Pin28=VP_TIM4_VS_ClockSourceINT
+Mcu.Pin20=PB4
+Mcu.Pin21=PB5
+Mcu.Pin22=PB6
+Mcu.Pin23=PB7
+Mcu.Pin24=PB8
+Mcu.Pin25=PB9
+Mcu.Pin26=VP_SYS_VS_Systick
+Mcu.Pin27=VP_TIM2_VS_ClockSourceINT
+Mcu.Pin28=VP_TIM3_VS_ClockSourceINT
+Mcu.Pin29=VP_TIM4_VS_ClockSourceINT
 Mcu.Pin3=PA1
 Mcu.Pin4=PA2
 Mcu.Pin5=PA3
@@ -82,7 +84,7 @@ Mcu.Pin6=PA5
 Mcu.Pin7=PA6
 Mcu.Pin8=PA7
 Mcu.Pin9=PB0
-Mcu.PinsNb=29
+Mcu.PinsNb=30
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F103C8Tx
@@ -116,6 +118,8 @@ PA1.PinState=GPIO_PIN_SET
 PA1.Signal=GPIO_Output
 PA10.Mode=Asynchronous
 PA10.Signal=USART1_RX
+PA11.Locked=true
+PA11.Signal=S_TIM1_CH4
 PA12.GPIOParameters=GPIO_PuPd,GPIO_Label,GPIO_ModeDefaultEXTI
 PA12.GPIO_Label=Echo
 PA12.GPIO_ModeDefaultEXTI=GPIO_MODE_IT_RISING_FALLING
@@ -250,6 +254,8 @@ SH.ADCx_IN6.0=ADC1_IN6,IN6
 SH.ADCx_IN6.ConfNb=1
 SH.GPXTI12.0=GPIO_EXTI12
 SH.GPXTI12.ConfNb=1
+SH.S_TIM1_CH4.0=TIM1_CH4,PWM Generation4 CH4
+SH.S_TIM1_CH4.ConfNb=1
 SH.S_TIM3_CH2.0=TIM3_CH2,PWM Generation2 CH2
 SH.S_TIM3_CH2.ConfNb=1
 SH.S_TIM3_CH3.0=TIM3_CH3,PWM Generation3 CH3
@@ -260,6 +266,8 @@ SH.S_TIM4_CH1.0=TIM4_CH1,PWM Generation1 CH1
 SH.S_TIM4_CH1.ConfNb=1
 SH.S_TIM4_CH2.0=TIM4_CH2,PWM Generation2 CH2
 SH.S_TIM4_CH2.ConfNb=1
+TIM1.Channel-PWM\ Generation4\ CH4=TIM_CHANNEL_4
+TIM1.IPParameters=Channel-PWM Generation4 CH4
 TIM2.AutoReloadPreload=TIM_AUTORELOAD_PRELOAD_DISABLE
 TIM2.IPParameters=Prescaler,Period,AutoReloadPreload
 TIM2.Period=72 - 1
diff --git a/Core/Inc/tim.h b/Core/Inc/tim.h
index 10a8e1b..4615e6b 100644
--- a/Core/Inc/tim.h
+++ b/Core/Inc/tim.h
@@ -32,6 +32,8 @@ extern "C" {
 
 /* USER CODE END Includes */
 
+extern TIM_HandleTypeDef htim1;
+
 extern TIM_HandleTypeDef htim2;
 
 extern TIM_HandleTypeDef htim3;
@@ -42,6 +44,7 @@ extern TIM_HandleTypeDef htim4;
 
 /* USER CODE END Private defines */
 
+void MX_TIM1_Init(void);
 void MX_TIM2_Init(void);
 void MX_TIM3_Init(void);
 void MX_TIM4_Init(void);
diff --git a/Core/Src/main.c b/Core/Src/main.c
index f7f1316..1973bb6 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -106,6 +106,7 @@ int main(void)
   MX_USART2_UART_Init();
   MX_USART1_UART_Init();
   MX_ADC1_Init();
+  MX_TIM1_Init();
   /* USER CODE BEGIN 2 */
   HC_SR04_Init();
   HAL_ADC_Start_DMA(&hadc1,(uint32_t*)adc_value,2);
@@ -120,7 +121,7 @@ int main(void)
         //printf("%s","test\n");
 
     //  HAL_ADC_Start(&hadc1);//启动ADC1转换//======================================
-		//HAL_ADC_PollForConversion(&hadc1,50);//等待ADC转换完成（句柄，超时时间�?
+		//HAL_ADC_PollForConversion(&hadc1,50);//等待ADC转换完成（句柄，超时时间�??
 		//adc_value = HAL_ADC_GetValue(&hadc1); //读取ADC转换数据
 		printf("PA5_value = %f\r\n",  1.0 *adc_value[0]);//输出转换后的烟雾传感器的值的数据
     printf("PA6_value = %f\r\n",  1.0 *adc_value[1]);//输出转换后的烟雾传感器的值的数据
diff --git a/Core/Src/tim.c b/Core/Src/tim.c
index ec3e6eb..2ced9c1 100644
--- a/Core/Src/tim.c
+++ b/Core/Src/tim.c
@@ -24,10 +24,70 @@
 
 /* USER CODE END 0 */
 
+TIM_HandleTypeDef htim1;
 TIM_HandleTypeDef htim2;
 TIM_HandleTypeDef htim3;
 TIM_HandleTypeDef htim4;
 
+/* TIM1 init function */
+void MX_TIM1_Init(void)
+{
+
+  /* USER CODE BEGIN TIM1_Init 0 */
+
+  /* USER CODE END TIM1_Init 0 */
+
+  TIM_MasterConfigTypeDef sMasterConfig = {0};
+  TIM_OC_InitTypeDef sConfigOC = {0};
+  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
+
+  /* USER CODE BEGIN TIM1_Init 1 */
+
+  /* USER CODE END TIM1_Init 1 */
+  htim1.Instance = TIM1;
+  htim1.Init.Prescaler = 0;
+  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
+  htim1.Init.Period = 65535;
+  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+  htim1.Init.RepetitionCounter = 0;
+  htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
+  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sConfigOC.OCMode = TIM_OCMODE_PWM1;
+  sConfigOC.Pulse = 0;
+  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
+  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
+  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
+  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
+  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
+  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
+  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
+  sBreakDeadTimeConfig.DeadTime = 0;
+  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
+  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
+  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
+  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN TIM1_Init 2 */
+
+  /* USER CODE END TIM1_Init 2 */
+  HAL_TIM_MspPostInit(&htim1);
+
+}
 /* TIM2 init function */
 void MX_TIM2_Init(void)
 {
@@ -189,6 +249,22 @@ void MX_TIM4_Init(void)
 
 }
 
+void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* tim_pwmHandle)
+{
+
+  if(tim_pwmHandle->Instance==TIM1)
+  {
+  /* USER CODE BEGIN TIM1_MspInit 0 */
+
+  /* USER CODE END TIM1_MspInit 0 */
+    /* TIM1 clock enable */
+    __HAL_RCC_TIM1_CLK_ENABLE();
+  /* USER CODE BEGIN TIM1_MspInit 1 */
+
+  /* USER CODE END TIM1_MspInit 1 */
+  }
+}
+
 void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
 {
 
@@ -234,11 +310,30 @@ void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
 {
 
   GPIO_InitTypeDef GPIO_InitStruct = {0};
-  if(timHandle->Instance==TIM3)
+  if(timHandle->Instance==TIM1)
+  {
+  /* USER CODE BEGIN TIM1_MspPostInit 0 */
+
+  /* USER CODE END TIM1_MspPostInit 0 */
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+    /**TIM1 GPIO Configuration
+    PA11     ------> TIM1_CH4
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_11;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+  /* USER CODE BEGIN TIM1_MspPostInit 1 */
+
+  /* USER CODE END TIM1_MspPostInit 1 */
+  }
+  else if(timHandle->Instance==TIM3)
   {
   /* USER CODE BEGIN TIM3_MspPostInit 0 */
 
   /* USER CODE END TIM3_MspPostInit 0 */
+
     __HAL_RCC_GPIOA_CLK_ENABLE();
     __HAL_RCC_GPIOB_CLK_ENABLE();
     /**TIM3 GPIO Configuration
@@ -283,6 +378,22 @@ void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
 
 }
 
+void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* tim_pwmHandle)
+{
+
+  if(tim_pwmHandle->Instance==TIM1)
+  {
+  /* USER CODE BEGIN TIM1_MspDeInit 0 */
+
+  /* USER CODE END TIM1_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_TIM1_CLK_DISABLE();
+  /* USER CODE BEGIN TIM1_MspDeInit 1 */
+
+  /* USER CODE END TIM1_MspDeInit 1 */
+  }
+}
+
 void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
 {