利用STM32F103的高级定时器产生三路互补PWM波形，占空比可调，带死区

void timer_init(void)
{
    
    
	GPIO_InitTypeDef  GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
	TIM_OCInitTypeDef TIM_OCInitStructure;
	TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD,ENABLE);
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
	
	
	GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
	
	
	GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStructure);
	
	TIM_BaseInitStructure.TIM_Period=1000-1;
	TIM_BaseInitStructure.TIM_Prescaler=72-1;
	TIM_BaseInitStructure.TIM_ClockDivision=0;
	TIM_BaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;
	TIM_BaseInitStructure.TIM_RepetitionCounter=0;
	TIM_TimeBaseInit(TIM1,&TIM_BaseInitStructure);//启用ARR的影子寄存器（直到产生更新事件才更改设置） TIM_ARRPreloadConfig(TIM1,?ENABLE);
	
	//TIM1_OC1模块设置（设置1通道占空比）
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; 
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
	TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
	TIM_OCInitStructure.TIM_Pulse = 120;//TIM1_Pulse设置了待装入捕获比较寄存器的脉冲值  
	
	TIM_OC1Init(TIM1,&TIM_OCInitStructure);  //启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置） 
	TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);


	//TIM1_OC2模块设置（设置2通道占空比）

	TIM_OC2Init(TIM1, &TIM_OCInitStructure); //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
	TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable); 

	//TIM1_OC3模块设置（设置3通道占空比）

	TIM_OC3Init(TIM1, &TIM_OCInitStructure); //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
	TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable); 
	//死区设置
	TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
	TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
	TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
	TIM_BDTRInitStructure.TIM_DeadTime = 0x90; //这里调整死区大小0-0xff
	TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
	TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
	TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
	TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); 
	
	//TIM1开启
	TIM_Cmd(TIM1, ENABLE);
	//TIM1_OC通道输出PWM（一定要加）
	TIM_CtrlPWMOutputs(TIM1, ENABLE);
	
	
}
 

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