STM32

STM32F4 定时器触发 三ADC 规则+注入

2019-07-14 19:02发布

站内问答 / STM32/STM8
4657 0 1679
想要使用高级定时器相互触发，同时用定时器触发三个ADC的多路规则通道和注入通道，可是写好程序后ADC总是未被触发看了几遍也找不到问题，请教一下大家
  1. ADC配置：
  2.         ADC_CommonInitStructure.ADC_Mode = ADC_TripleMode_RegSimult;                 //adc三重模式
  3.         ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
  4.         ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
  5.         ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  6.         ADC_CommonInit(&ADC_CommonInitStructure);

  8.         // Channel-specific settings
  9.         ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;      //ADC分辨率双模式  12位精度
  10.         ADC_InitStructure.ADC_ScanConvMode = ENABLE;   //扫描模式
  11.         ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
  12.         ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Falling;     //选择外部触发方式 下降沿触发
  13.         ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T8_CC1;             //选择TIM8_CC1触发规则组开始转换的外部事件
  14.         ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;     //数据右对齐
  15.         ADC_InitStructure.ADC_NbrOfConversion = 4;       //指定使用规则通道组完成转换的次数   采样通道数

  17.         ADC_Init(ADC1, &ADC_InitStructure);
  18.         ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;  //不使用外部触发  （多ADC模式中，外部事件触发必须仅触发主ADC，从ADC设置为软件触发)
  19.         ADC_InitStructure.ADC_ExternalTrigConv = 0;
  20.         ADC_Init(ADC2, &ADC_InitStructure);
  21.         ADC_Init(ADC3, &ADC_InitStructure);

  23.         // Enable DMA request after last transfer (Multi-ADC mode)  多ADC模式下 使能 源数据变化时开启DMA传输
  24.         ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);

  26.         // Injected channels for current measurement at end of cycle
  27.         ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_T1_CC4);
  28.         ADC_ExternalTrigInjectedConvConfig(ADC2, ADC_ExternalTrigInjecConv_T8_CC2);
  29.         ADC_ExternalTrigInjectedConvEdgeConfig(ADC1, ADC_ExternalTrigInjecConvEdge_Falling);
  30.         ADC_ExternalTrigInjectedConvEdgeConfig(ADC2, ADC_ExternalTrigInjecConvEdge_Falling);
  31.         ADC_InjectedSequencerLengthConfig(ADC1, 2);   //设置注入通道长度  1-4
  32.         ADC_InjectedSequencerLengthConfig(ADC2, 2);

  34.     ADC_Channels();
  35.    
  36.         // Interrupt
  37.         ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);    //使能ADC的JEOC中断源   注入转换中断屏蔽结束
  38.    
  39.     ADC_AutoInjectedConvCmd(ADC1, ENABLE);
  40.     ADC_AutoInjectedConvCmd(ADC2, ENABLE);
  41.    
  42.     //Enable ADC_DMA
  43.     ADC_DMACmd(ADC1, ENABLE);
  44.     ADC_DMACmd(ADC2, ENABLE);
  45.     ADC_DMACmd(ADC3, ENABLE);

  47.         // Enable ADC1
  48.         ADC_Cmd(ADC1, ENABLE);

  50.         // Enable ADC2
  51.         ADC_Cmd(ADC2, ENABLE);

  53.         // Enable ADC3
  54.         ADC_Cmd(ADC3, ENABLE);
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  1. 定时器配置
  2. void TIM1_Config(void)
  3. {
  4.     TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  5.         TIM_OCInitTypeDef  TIM_OCInitStructure;
  6.    
  7.     TIM_DeInit(TIM1);
  8.         TIM1->CNT = 0;

  10.         // TIM1 clock enable
  11.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  13.         // Time Base configuration
  14.         TIM_TimeBaseStructure.TIM_Prescaler = 8399;
  15.         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  16.         TIM_TimeBaseStructure.TIM_Period = 9999;
  17.         TIM_TimeBaseStructure.TIM_ClockDivision = 0;    //时钟分割
  18.         TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

  20.         TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  22.         // Channel 1, 2 and 3 Configuration in PWM mode
  23.         TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  24.         TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  25.         TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  26.         TIM_OCInitStructure.TIM_Pulse = TIM1->ARR / 2;
  27.         TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;      //输出比较极性 高
  28.         TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;  //互补输出极性 高
  29.         TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;        //空闲状态期间输出比较引脚状态
  30.         TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
  31.         TIM_OC4Init(TIM1, &TIM_OCInitStructure);

  33.         TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);

  35.         TIM_CCPreloadControl(TIM1, ENABLE);
  36.         TIM_ARRPreloadConfig(TIM1, ENABLE);

  38.         // TIM1 Master and TIM8 slave
  39.         TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);
  40.         TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);
  41.    
  42.     TIM_CCxCmd(TIM1, TIM_Channel_4, TIM_CCx_Enable);

  44.         // Enable TIM1 and TIM8
  45.         TIM_Cmd(TIM1, ENABLE);

  47.         // Main Output Enable
  48.         TIM_CtrlPWMOutputs(TIM1, ENABLE);   //设置TIM1 的PWM输出使能

  50. }

  52. void TIM8_Config(void)
  53. {
  54.     TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  55.         TIM_OCInitTypeDef  TIM_OCInitStructure;
  56.    
  57.     TIM_DeInit(TIM8);
  58.     TIM8->CNT = 0;
  59.    
  60.         // ------------- Timer8 for ADC sampling ------------- //
  61.         // Time Base configuration
  62.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);

  64.         TIM_TimeBaseStructure.TIM_Prescaler = 8399;
  65.         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  66.         TIM_TimeBaseStructure.TIM_Period = 9999;
  67.         TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  68.         TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  69.         TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);

  71.         TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  72.         TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  73.         TIM_OCInitStructure.TIM_Pulse = TIM8->ARR / 2;
  74.         TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  75.         TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  76.         TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  77.         TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
  78.         TIM_OC1Init(TIM8, &TIM_OCInitStructure);
  79.         TIM_OC1PreloadConfig(TIM8, TIM_OCPreload_Enable);
  80.         TIM_OC2Init(TIM8, &TIM_OCInitStructure);
  81.         TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable);

  83.         TIM_ARRPreloadConfig(TIM8, ENABLE);
  84.         TIM_CCPreloadControl(TIM8, ENABLE);

  86.         TIM_CtrlPWMOutputs(TIM8, ENABLE);
  87.    
  88.     TIM_SelectInputTrigger(TIM8, TIM_TS_ITR0);              //选择输入触发源   ITR0
  89.         TIM_SelectSlaveMode(TIM8, TIM_SlaveMode_Reset);        //计数器从模式选择   所选的触发信号上升沿重新初始化
  90.    
  91.     TIM_ITRxExternalClockConfig(TIM8, TIM_TS_ITR0);      //选择ITR0为触发源提供时钟

  93.     TIM_CCxCmd(TIM8, TIM_Channel_1, TIM_CCx_Enable);
  94.     TIM_CCxCmd(TIM8, TIM_Channel_2, TIM_CCx_Enable);
  95.    
  96.     TIM_ITConfig(TIM8, TIM_IT_CC1, ENABLE);
  97.     TIM_ITConfig(TIM8, TIM_IT_CC2, ENABLE);
  98.    
  99.     TIM_Cmd(TIM8, ENABLE);
  100. }

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