STM32F407ZGTx 输出三相PWM信号_stm32输出三路频率可调相位可调的方波

三相PWM信号

三相方波在电机驱动领域应用非常广泛，如下图所示，Ha,Hb,Hc分别为三路方波信号，每次只给三相电机的两相通电

STM32F407生成三相PWM信号

为了便于区分，我们将最终需要的这三相PWM信号分别定义为Ha,Hb,Hc,即为上图的三路方波。
TIM1_CH1产生第1路PWM信号，即Ha;
TIM1_CH2产生第2路PWM信号作为触发信号，即Hb的触发信号；
TIM3_CH1产生第3路PWM信号，即Hb（该路信号被TIM1_CH2生成的信号所触发）；
TIM3_CH2产生第4路PWM信号作为触发信号，即Hc的触发信号；
TIM4_CH1产生第5路PWM信号，即Hc（该路信号被TIM3_CH2生成的信号所触发）；

TIM1_PWM_Init(3000-1,56-1);	//168M/56 = 3M   频率   3M /3000 = 1K Hz
TIM3_PWM_Init(3000-1,28-1); //84M/28  = 3M 
TIM3_IN_Config(); 
TIM_SetCompare1(TIM1,1500);	//
TIM_SetCompare1(TIM3,1500);	//
TIM4_PWM_Init(3000-1,28-1);
TIM_SetCompare1(TIM4,1500);
TIM4_IN_Config();	
1
2
3
4
5
6
7
8

TIM1配置代码

  //TIM1-CH1  PA8
  //TIM1-OC2  
void TIM1_PWM_Init(u32 arr,u32 psc)
{
   		 					 
	/*结构体声明*/
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
    TIM_BDTRInitTypeDef TIM_BDTRStructure;
    /*时钟使能*/
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);  	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); 	
	
    /*IO复用*/
	GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_TIM1); 
	
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8;           //PA.8 TIM1_CH1
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;        
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;	
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;      
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       
	GPIO_Init(GPIOA,&GPIO_InitStructure);              
	 
	TIM_TimeBaseStructure.TIM_Prescaler=psc;  
	TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; 
	TIM_TimeBaseStructure.TIM_Period=arr;   
	TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; 
	TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
    
  	TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2; 
  	TIM_OCInitStructure.TIM_Pulse=0; 	
  	TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;  
  	TIM_OCInitStructure.TIM_OutputState
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33