欧美极品高清xxxxhd,国产日产欧美最新,无码AV国产东京热AV无码,国产精品人与动性XXX,国产传媒亚洲综合一区二区,四库影院永久国产精品,毛片免费免费高清视频,福利所导航夜趣136

標題: STM32 4路PWM配置完全函數分析 [打印本頁]

作者: qinqin 時間: 2015-6-9 01:56
標題: STM32 4路PWM配置完全函數分析
STM32 4路PWM配置完全函數：STM324路PWM配置完全函數：

void PWM_Configuration(void)//PWM初始化函數
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定時器初始化結構
  TIM_OCInitTypeDef TIM_OCInitStructure;//通道輸出初始化結構
  GPIO_InitTypeDefGPIO_InitStructure;//輸出通道的GPIO管腳結構
//(1)TIM3初始化,時間基部分
  TIM_TimeBaseStructure.TIM_Period=999;       //周期0～999
  TIM_TimeBaseStructure.TIM_Prescaler =71;       //時鐘分頻
  TIM_TimeBaseStructure.TIM_ClockDivision =0;    //時鐘分割
  TIM_TimeBaseStructure.TIM_CounterMode =TIM_CounterMode_Up;//模式
  TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);  //基本初始化
  //TIM_ITConfig(TIM3, TIM_IT_CC4,ENABLE); //打開中斷，中斷需要這行代碼
  //(2)TIM3通道初始化，CCP部分
  TIM_OCStructInit(&TIM_OCInitStructure);                         //默認參數
  TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1;                //工作狀態
  TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;    //設定為輸出，需要PWM輸出才需要這行代碼
  TIM_OCInitStructure.TIM_Pulse =250;                               //占空長度
  TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High;          //高電平
  TIM_OC4Init(TIM3,&TIM_OCInitStructure);                         //通道初始化

  TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1;                //工作狀態
  TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;    //設定為輸出，需要PWM輸出才需要這行代碼
  TIM_OCInitStructure.TIM_Pulse =900;                               //占空長度
  TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High;          //高電平
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
  TIM_Cmd(TIM3,ENABLE);             //使能TIM3，到此在TIM中已配置完成，下面開始配置GPIO

  //(3)PWM輸出通道初始化
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;//選擇PC
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz; //管腳頻率為50MHZ
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF_PP; //模式為推挽輸出
GPIO_Init(GPIOC,&GPIO_InitStructure);  //初始化GPIOA寄存器
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM3 ,ENABLE);

}

歡迎光臨 (http://m.raoushi.com/bbs/)