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 用cube ide  配置 PA1 为定时器 15的通道 1N ,生成代码如下。 预分频器 0 脉冲 5000 用示波器检测是一条平线。 为什么 PA1 上没有产生 pwm? 
 static void MX_TIM15_Init(void){   /* USER CODE BEGIN TIM15_Init 0 */   /* USER CODE END TIM15_Init 0 */   TIM_ClockConfigTypeDef sClockSourceConfig = {0};  TIM_MasterConfigTypeDef sMasterConfig = {0};  TIM_OC_InitTypeDef sConfigOC = {0};  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};   /* USER CODE BEGIN TIM15_Init 1 */   /* USER CODE END TIM15_Init 1 */  htim15.Instance = TIM15;  htim15.Init.Prescaler = 0;  htim15.Init.CounterMode = TIM_COUNTERMODE_UP;  htim15.Init.Period = 10000;  htim15.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;  htim15.Init.RepetitionCounter = 0;  htim15.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;  if (HAL_TIM_Base_Init(&htim15) != HAL_OK)  {    Error_Handler();  }  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;  if (HAL_TIM_ConfigClockSource(&htim15, &sClockSourceConfig) != HAL_OK)  {    Error_Handler();  }  if (HAL_TIM_PWM_Init(&htim15) != HAL_OK)  {    Error_Handler();  }  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;  if (HAL_TIMEx_MasterConfigSynchronization(&htim15, &sMasterConfig) != HAL_OK)  {    Error_Handler();  }  sConfigOC.OCMode = TIM_OCMODE_PWM2;  sConfigOC.Pulse = 5000;  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_LOW;  sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;  if (HAL_TIM_PWM_ConfigChannel(&htim15, &sConfigOC, TIM_CHANNEL_1) != 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.BreakFilter = 0;  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;  if (HAL_TIMEx_ConfigBreakDeadTime(&htim15, &sBreakDeadTimeConfig) != HAL_OK)  {    Error_Handler();  }  /* USER CODE BEGIN TIM15_Init 2 */   /* USER CODE END TIM15_Init 2 */  HAL_TIM_MspPostInit(&htim15); }
 
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