转成自动转换

2万 · 2020-3-8 11:52

我用寄存器方式设置ADC+DMA转换,如果在TIM1_CC4的中断中手动转换,则OK;但是我想把它转成自动转换,则死活不行,哪位高手有什么办

2万 · 2020-3-8 11:57

看看程序

2万 · 2020-3-8 12:01

ADC 初始化
void ADC_Init(void)
{
      //1-打开ADC的时钟
      RCC->APB2ENR |=RCC_APB2ENR_ADC1EN;
      //2- ADC Calibration
      ADC1->CR |=(1ul<<31);
      while(ADC1->CR&(1ul<<31));
      //3-clear
      ADC1->CFGR1=0;
      //4-连续模式-OFF
      ADC1->CFGR1 |=(0<<13);
      //6-右对齐
      ADC1->CFGR1 |=(0<<5);
      //7-12bit
      ADC1->CFGR1 |=(0<<3);
      //8-扫描方向
      ADC1->CFGR1 |=(0<<2);
      //9-采样时间
      ADC1->SMPR =3;
      //10-Vref
      ADC1->CHSELR |=(1ul<<17);
      ADC->CCR |=(1<<22)|(1<<23);
      //11-采样通道0, 1,5,6,16,17
      ADC1->CHSELR |=(1<<0)|(1<<1)|(1<<5)|(1<<6)|(1<<16)|(1<<17);
      //12-rising
      ADC1->CFGR1 |=(1<<10);
      //13-TIM1-CC4 triger
      ADC1->CFGR1 |=(1<<6);
      //14-DMA
      ADC1->CFGR1 |=(0<<1)|(1<<0);
      //15-Enable ADC
      ADC1->CR |=(1<<0);
      //16-Start ADC
      //ADC_Start();
      ADC1->CR |=(1<<2);
}
//TIM1初始化
void TIM1_PWM_Init(void)
{
      TIM_OCInitTypeDef  TIM_OCst;
      //1-打开PORTA的时钟
      RCC->AHBENR|=RCC_AHBENR_GPIOAEN;

//       //2-PA6--Brake input
//       GPIOA->MODER |=(2<<(2*6));                      //复用功能
//       GPIOA->PUPDR &=~(3<<(2*6));                      //无上拉下拉
//       GPIOA->OTYPER |=(1<<6);                               //0-pushpull; 1-OD
//       GPIOA->OSPEEDR |=(3<<(2*6));             //输出速度
//       GPIOA->AFR[0] |=(2<<(4*6));                      //PA6--T1_BKIN

      //3-set PA7       as AF
      GPIOA->MODER |=(CHN_MODE<<(2*7));       //AF function
      GPIOA->OSPEEDR |=(3<<(2*7));
      #if CHN_MODE==2
      GPIOA->PUPDR |=(2<<(2*7));                      //pull-down
      GPIOA->AFR[0] |=(2<<(4*7));                      //AF2--T1_CH1N
      #endif
      //3-PA8--T1_CH1
      GPIOA->MODER |=(2<<(2*8));                      //模式选择
      GPIOA->OSPEEDR |=(3<<(2*8));             //输出速度
      GPIOA->PUPDR |=(2<<(2*8));                      //pull-down
      GPIOA->AFR[1] |=(2<<(4*(8-8)));             //AF2--T1_CH1
      //4-PA9--T1_CH2
      GPIOA->MODER |=(2<<(2*9));
      GPIOA->OSPEEDR |=(3<<(2*9));
      GPIOA->PUPDR |=(2<<(2*9));                      //pull-down
      GPIOA->AFR[1] |=(2<<(4*(9-8)));
      //5-PA10--T1_CH3
      GPIOA->MODER |=(2<<(2*10));
      GPIOA->OSPEEDR |=(3<<(2*10));
      GPIOA->PUPDR |=(2<<(2*10));                      //pull-down
      GPIOA->AFR[1] |=(2<<(4*(10-8)));

      //打开PORTB的时钟
      RCC->AHBENR|=RCC_AHBENR_GPIOBEN;

      //set PB0 as AF function
      GPIOB->MODER |=(CHN_MODE<<(2*0));       //AF function
      GPIOB->OSPEEDR |=(3<<(2*0));
      #if CHN_MODE==2
      GPIOB->PUPDR |=(2<<(2*0));
      GPIOB->AFR[0] |=(2<<(4*0));                      //AF2-TIM1_CH2N
      #endif

      //set PB1 as AF function
      GPIOB->MODER |=(CHN_MODE<<(2*1));       //AF function
      GPIOB->OSPEEDR |=(3<<(2*1));
      #if CHN_MODE==2
      GPIOB->PUPDR |=(2<<(2*1));
      GPIOB->AFR[0] |=(2<<(4*1));                      //AF2-TIM1_CH3N
      #endif

      //打开TIM1的时钟
      RCC->APB2ENR |=RCC_APB2ENR_TIM1EN;

/* Time 定时基础设置*/
      TIM1->CR1 =(0<<8);                      //clock division
      TIM1->CR1 |=(0<<5);                      //0-边沿对齐,1-中心对齐1
      //预分频
      TIM1->PSC =0;
      /****** 重复频率 */
      TIM1->ARR=ARR_DATA;
/* Set the Repetition Counter value */
TIM1->RCR = 0;

      TIM_OCst.TIM_OCMode = TIM_OCMode_PWM1;
      TIM_OCst.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCst.TIM_OutputNState = TIM_OutputNState_Enable;
      TIM_OCst.TIM_OCPolarity = TIM_OCPolarity_High;
      TIM_OCst.TIM_OCNPolarity = TIM_OCNPolarity_High;
      TIM_OCst.TIM_OCIdleState = TIM_OCIdleState_Set;
      TIM_OCst.TIM_OCNIdleState = TIM_OCNIdleState_Set;

      TIM_OCst.TIM_Pulse = 1000;
      TIM_OC1Init(TIM1, &TIM_OCst);
      TIM_OC2Init(TIM1, &TIM_OCst);
      TIM_OC3Init(TIM1, &TIM_OCst);

      /*config CC4 for ADC trigger*/
      TIM_OCst.TIM_Pulse = 1000-20;
      TIM_OC4Init(TIM1, &TIM_OCst);
      //OC4REF as TRIGO
      TIM1->CR2 =(7<<4);


      //configure TIM1 as Master mode(updata)
      TIM1->CR2 |=(2<<4);
      //设置死区时间
      TIM1->BDTR =(1<<10)|(1<<11)|(0<<12)|16;
      SetTIMxOut(TIM1,0);

      //设置break和CC4,UIF中断
      TIM1->DIER =(0<<7)|(1<<4);
      SetINT(TIM1_CC_IRQn,1);
      SetINT(TIM1_BRK_UP_TRG_COM_IRQn,0);
      //开始计数
TIM1->CR1 |= TIM_CR1_CEN;
}

2万 · 2020-3-8 12:04

你觉得问题会是出现在哪里呢，这样一味贴代码是没有用的

2万 · 2020-3-8 12:08

晕，我贴还是不贴啊

2万 · 2020-3-8 12:10

关于ADC+DMA转换手册上是怎么说的，以手册为准

2万 · 2020-3-8 12:18

这个得看一下你的程序是怎么写的，我的就没有问题

2万 · 2020-3-8 12:21

按理说多次转换也没问题的

2万 · 2020-3-8 12:25

好的，我明天去单位试一下，多谢各位大侠了哈