ADC 触发设置

只看该作者 · 2012-10-6 10:06

STM32，ADC用为inject的ADC1和ADC2同步，用TIM1的CC4触发，怎样设置？

只看该作者 · 2012-10-6 10:07

TIM_TimeBaseStructure.TIM_Period          = MAX_CYCLE - 1;                   // 自动重装载寄存器的值
  TIM_TimeBaseStructure.TIM_Prescaler       = 1;                               // 时钟预分频数
  TIM_TimeBaseStructure.TIM_ClockDivision    = TIM_CKD_DIV1;                   // 采样分频
  //TIM_TimeBaseStructure.TIM_CounterMode    = TIM_CounterMode_Up;             //向上计数
  TIM_TimeBaseStructure.TIM_CounterMode    = TIM_CounterMode_CenterAligned1; // 向上计数
  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 );

TIM_OC4Init( TIM1, &TIM_OCInitStructure );                         //按照指定参数初始化
  //TIM_SelectOutputTrigger( TIM1, TIM_TRGOSource_OC4Ref );
  TIM_SetCompare4( TIM1, MAX_CYCLE / 2 );
  TIM_GenerateEvent( TIM1, TIM_EventSource_CC4 );

只看该作者 · 2012-10-6 10:08

ADC_InjectedChannelConfig( ADC1, ADC_Channel_2, 1, ADC_SampleTime_1Cycles5 );  // 9 as for curent A
  ADC_InjectedChannelConfig( ADC1, ADC_Channel_2, 2, ADC_SampleTime_1Cycles5 );
  ADC_InjectedChannelConfig( ADC1, ADC_Channel_2, 3, ADC_SampleTime_1Cycles5 );
  ADC_InjectedChannelConfig( ADC1, ADC_Channel_2, 4, ADC_SampleTime_1Cycles5 );

  ADC_InjectedChannelConfig( ADC2, ADC_Channel_1, 1, ADC_SampleTime_1Cycles5 );  // 8 as for curent B
  ADC_InjectedChannelConfig( ADC2, ADC_Channel_1, 2, ADC_SampleTime_1Cycles5 );
  ADC_InjectedChannelConfig( ADC2, ADC_Channel_1, 3, ADC_SampleTime_1Cycles5 );
  ADC_InjectedChannelConfig( ADC2, ADC_Channel_1, 4, ADC_SampleTime_1Cycles5 );
  //ADC_ExternalTrigInjectedConvConfig( ADC1, ADC_ExternalTrigInjecConv_T1_CC4 );
  //ADC_ExternalTrigInjectedConvConfig( ADC2, ADC_ExternalTrigInjecConv_T1_CC4 );

  //ADC_SetInjectedOffset( ADC1, ADC_InjectedChannel_1, 0xff );
  //ADC_SetInjectedOffset( ADC2, ADC_InjectedChannel_1, 0xff );
  ADC_InjectedSequencerLengthConfig( ADC1, 1 );
  ADC_InjectedSequencerLengthConfig( ADC2, 1 );
  ADC_ExternalTrigInjectedConvConfig( ADC1, ADC_ExternalTrigInjecConv_T1_CC4 );
  ADC_ExternalTrigInjectedConvConfig( ADC2, ADC_ExternalTrigInjecConv_T1_CC4 );
  ADC_ExternalTrigInjectedConvCmd( ADC1, ENABLE );
  //ADC_AutoInjectedConvCmd( ADC1, ENABLE );
  //ADC_AutoInjectedConvCmd( ADC2, ENABLE );
  ADC_ITConfig( ADC1, ADC_IT_JEOC, ENABLE );

只看该作者 · 2012-10-6 10:08

NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 7;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init( &NVIC_InitStructure );