STM32 TIM1 PWM 1KHZ 輸出，占空比-1:1

GPIO_InitTypeDef GPIO_InitStructure2;         
 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;        
 TIM_OCInitTypeDef TIM_OCInitStructure;        
 TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
 //第一步：配置時鍾                 
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_TIM1,ENABLE);
 //第二步，配置goio口          
    GPIO_InitStructure2.GPIO_Pin=GPIO_Pin_8;         
 GPIO_InitStructure2.GPIO_Speed=GPIO_Speed_50MHz;         
 GPIO_InitStructure2.GPIO_Mode=GPIO_Mode_AF_PP;                 //設置為復用浮空輸出         
 GPIO_Init(GPIOA,&GPIO_InitStructure2);        
 
         
 GPIO_InitStructure2.GPIO_Pin=GPIO_Pin_13;         
 GPIO_InitStructure2.GPIO_Speed=GPIO_Speed_50MHz;         
 GPIO_InitStructure2.GPIO_Mode=GPIO_Mode_AF_PP;                 //設置為復用浮空輸出         
 GPIO_Init(GPIOB,&GPIO_InitStructure2);

 //第三步，定時器基本配置         
 TIM_TimeBaseStructure.TIM_Period=1000-1;                   // 自動重裝載寄存器的值        
 TIM_TimeBaseStructure.TIM_Prescaler=72-1;                  // 時鍾預分頻數        
 TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;      // 采樣分頻        
 TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;  //向上計數        
 TIM_TimeBaseStructure.TIM_RepetitionCounter=0;      //重復寄存器，用於自動更新pwm占空比                       
 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

 //第四步pwm輸出配置         
 TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;                    //設置為pwm1輸出模式         
 TIM_OCInitStructure.TIM_Pulse=500;                                 //設置占空比時間         
 TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;             //設置輸出極性         
 TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;        //使能該通道輸出         
 
 //下面幾個參數是高級定時器才會用到，通用定時器不用配置         
 TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High;        //設置互補端輸出極性         
 TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;//使能互補端輸出         
 TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;        //死區后輸出狀態         
 TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;//死區后互補端輸出狀態         
 TIM_OC1Init(TIM1,&TIM_OCInitStructure);                                            //按照指定參數初始化           
 
 //第五步，死區和剎車功能配置，高級定時器才有的，通用定時器不用配置         
 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;//運行模式下輸出
 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Disable;//空閑模式下輸出選擇          
 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;         //鎖定設置        
 TIM_BDTRInitStructure.TIM_DeadTime = 0x90;                                         //死區時間設置         
 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;                 //剎車功能使能         
 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;//剎車輸入極性        
 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;//自動輸出使能          
 TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);

 //第六步，使能端的打開 
 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能TIMx在CCR1上的預裝載寄存器         
 TIM_ARRPreloadConfig(TIM1, ENABLE);                //使能TIMx在ARR上的預裝載寄存器         
 TIM_Cmd(TIM1,ENABLE);                              //打開TIM2         
 
 //下面這句是高級定時器才有的，輸出pwm必須打開         
 TIM_CtrlPWMOutputs(TIM1, ENABLE);                                   //pwm輸出使能，一定要記得打開

 // 在運行當中想要改變pwm的頻率和占空比調用：
 TIM_SetAutoreload(TIM1,1000); 
 TIM_SetCompare1(TIM1,500);

 

原文地址：http://blog.sina.com.cn/s/blog_6589027f0102vj3r.html