如何利用proteus仿真stm32控制呼吸灯？

设计思路：

采用stm32f103r6为主控芯片，及led-green；时钟源为晶振为8M的系统内部时钟；使用的定时器为TIM2，并且使用PWM Generation CH1为PWM输出；

• proteus仿真电路设计
  
  

• 软件设计：
  
  

/***   TIM2和PWM配置    ***/
TIM_HandleTypeDef htim2;
/* TIM2 init function */
void MX_TIM2_Init(void)
{  
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
htim2.Instance = TIM2;  htim2.Init.Prescaler = 8000-1;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 100-1;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
{   
          Error_Handler();
  }
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;  
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{   
        Error_Handler();
  }
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
{   
        Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveModeTIM_MASTERSLAVEMODE_DISABLE;  
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{   
         Error_Handler();
}  
sConfigOC.OCMode = TIM_OCMODE_PWM1;  
sConfigOC.Pulse = 50;  
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;  
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{   
        Error_Handler();
}
HAL_TIM_MspPostInit(&htim2);
}


/***   开启PWM    ***/
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
1
/***   主函数    ***/
int main(void)
{  
/* USER CODE BEGIN 1 */  
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/  
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */  
HAL_Init();  
/* USER CODE BEGIN Init */
/* USER CODE END Init */  
/* Configure the system clock */
ystemClock_Config();  
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */  
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_TIM2_Init();
/* USER CODE BEGIN 2 */
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
int i = 0;
/* USER CODE END 2 */   
/* Infinite loop */  
/* USER CODE BEGIN WHILE */
  while (1)
  {   
    /* USER CODE END WHILE */   
    /* USER CODE BEGIN 3 */
    for(i=0;i<=100;i++)       
        {               
         __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1,  i);
         HAL_Delay(100);               
         i+=9;       
        }          
    for(i=100;i>=0;i--)       
        {                  
        __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1,  i);
        HAL_Delay(100);               
        i-=9;       
        }   
  }  
/* USER CODE END 3 */
}
Keil仿真PWM引脚输出波形：