STM32 TIM1 SPWM

1万 · 2021-12-1 21:52

本来是想通过TIM1生成两路互补的SPWM波的
结果有点问题
请各位指导指导程序如下：
#include"time1.h"

int f=0;
u16 CCR1=200;
u16 CCR2=200;

static  u16 SPWM_Date[100]=
{203,215,228,240,252,264,276,287,299,309,
320,329,339,347,356,363,370,376,382,387,
391,394,396,398,399,399,399,397,395,392,
389,384,379,373,367,359,352,343,334,325,
314,304,293,282,270,258,246,234,221,209,
196,184,171,159,147,135,123,112,100,90,
79,70,60,52,43,36,29,23,17,12,8,5,3,1,0,
0,0,2,4,7,10,15,20,26,32,40,47,56,65,74,
85,95,106,117,129,141,153,165,178,190};

/*配置TIM1输出的PWM信号的模式，如周期、极性、占空比 */

void TIM1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//开启时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);                         //使能定时器3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);    //使能GPIO和服用功能时钟
//  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);                            //引脚重映射要开这个时钟
//初始化GPI
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9; //PWM输出在PA8,9,10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                   //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);                            //初始化GPIO

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14;  //PWM输出在PA7
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                   //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);                            //初始化GPIO

//初始化定时器 TIM1
TIM_TimeBaseStructure.TIM_Period = 400-1; //7.2M/400=18k                         //设置在自动重装载周期值
TIM_TimeBaseStructure.TIM_Prescaler =0;                         //设置预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0;                      //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;       //TIM 向上计数模式
//  TIM_TimeBaseStructure.TIM_RepetitionCounter=0;                   //重复寄存器，用于自动更新pwm占空比
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

//pwm输出配置,TIM_OCInitStructure共七项配置
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;                   //设置为pwm2输出模式
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
//TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;             //设置输出极性//输出极性和互补极性的有效电平为低
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;       //使能该通道输出//比较输出使能
//下面几个参数(除了pulse)是高级定时器才会用到，通用定时器不用配置
  //  TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCPolarity_High;             //设置互补端输出极性//输出极性和互补极性的有效电平为低
TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;    //使能互补端输出
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;       //死区后输出状态
TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset;       //死区后互补端输出状态
//设置通道1捕获比较寄存器的脉冲值-占空比为50%
// TIM_OCInitStructure.TIM_Pulse=CCR1;
TIM_OC1Init(TIM1,&TIM_OCInitStructure);                            //设置通道1
//设置通道2捕获比较寄存器的脉冲值-占空比为25%
// TIM_OCInitStructure.TIM_Pulse=CCR2;
TIM_OC2Init(TIM1,&TIM_OCInitStructure);
////设置通道3捕获比较寄存器的脉冲值-占空比为12.5%
// TIM_OCInitStructure.TIM_Pulse=CCR3_Val;
// TIM_OC3Init(TIM1,&TIM_OCInitStructure);
//死区和刹车功能配置，高级定时器才有的，通用定时器不用配置TIM_BDTRInitStructure，共七项配置
      TIM_BDTRInitStructure.TIM_OSSRState=TIM_OSSRState_Disable;       //运行模式下输出选择//运行模式下“关闭状态”使能
      TIM_BDTRInitStructure.TIM_OSSIState=TIM_OSSIState_Disable;       //空闲模式下输出选择//关闭模式下“关闭状态”使能
      TIM_BDTRInitStructure.TIM_LOCKLevel=TIM_LOCKLevel_OFF;             //锁定设置  //锁定关闭
      TIM_BDTRInitStructure.TIM_DeadTime=0x01;                         //死区时间设置
      TIM_BDTRInitStructure.TIM_Break=TIM_Break_Disable;                   //刹车功能使能
      TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_High;       //刹车输入极性 //刹车输入高电平有效
      TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable; //自动输出使能

      TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);
//使能端的打开
      TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);       //使能TIMx在CCR1上的预装载寄存器?
      TIM_ARRPreloadConfig(TIM1,ENABLE);                   //使能TIMx在ARR上的预装载寄存器?
      TIM_Cmd(TIM1,ENABLE);                            //打开TIM2?
//下面这句是高级定时器才有的，输出pwm必须打开?
      TIM_CtrlPWMOutputs(TIM1,ENABLE);                      //pwm输出使能，一定要记得打开
}
void TIM2_Init()
{
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      NVIC_InitTypeDef NVIC_InitStructure;
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //时钟使能

      //定时器TIM3初始化
//       TIM_TimeBaseStructure.TIM_Period =1000-1; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
//       TIM_TimeBaseStructure.TIM_Prescaler =36-1; //设置用来作为TIMx时钟频率除数的预分频值
      TIM_TimeBaseStructure.TIM_Period =9000; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
      TIM_TimeBaseStructure.TIM_Prescaler =655; //设置用来作为TIMx时钟频率除数的预分频值
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
      TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

      TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断

      //中断优先级NVIC设置
      NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;          //TIM3中断
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;       //从优先级3级
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;          //IRQ通道被使能
      NVIC_Init(&NVIC_InitStructure);                         //初始化NVIC寄存器

      TIM_Cmd(TIM2, ENABLE);  //使能TIMx
}
void TIM2_IRQHandler(void)
{
      if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
            {
            TIM_ClearITPendingBit(TIM2, TIM_IT_Update  );
            {
                     TIM1->CCR1=SPWM_Date[f];
                     TIM1->CCR2=SPWM_Date[f];
                     f++;
            }
            if(f>=100)
            {
                     f=0;
            }
            }
}