stm32f103rct6，配置成双ADC同步规则模式时，主ADC1、从ADC2，因为需要总共采集9路通道，便配置成ADC1转换5路通道，ADC2转换4路，结果发现数据会出现错乱的情况。这是什么原因啊，谢谢各位老哥了

顶一下

有代码吗？怎么配置的？

ldptest 发表于 2020-7-22 15:39
有代码吗？怎么配置的？

        TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
        TIM_TimeBaseStructure.TIM_Period=1999;   
        TIM_TimeBaseStructure.TIM_Prescaler=6;
        TIM_TimeBaseStructure.TIM_ClockDivision=0x0;
        TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;  
        TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);//TIM4_CH4

        TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
        TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_Pulse=300;
        TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low;
        TIM_OC4Init(TIM4,&TIM_OCInitStructure);//TIM4_CH4       

        DMA_DeInit(DMA1_Channel1);
        DMA_InitStructure.DMA_PeripheralBaseAddr=(uint32)ADC1_DR_Address;
        DMA_InitStructure.DMA_MemoryBaseAddr=(uint32)ADC_DualConvValueBuffer1;
        DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;
        DMA_InitStructure.DMA_BufferSize=5;
        DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
        DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;
        DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_Word;
        DMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_Word;
        DMA_InitStructure.DMA_Mode=DMA_Mode_Circular;
        DMA_InitStructure.DMA_Priority=DMA_Priority_VeryHigh;
        DMA_InitStructure.DMA_M2M=DMA_M2M_Disable;
        DMA_Init(DMA1_Channel1,&DMA_InitStructure);  

        //ADC1 configuration -Master
        ADC_InitStructure.ADC_Mode=ADC_Mode_RegSimult;
        ADC_InitStructure.ADC_ScanConvMode=ENABLE;
        ADC_InitStructure.ADC_ContinuousConvMode=DISABLE;
        ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_T4_CC4;
        ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right;
        ADC_InitStructure.ADC_NbrOfChannel=5;
        ADC_Init(ADC1,&ADC_InitStructure);
        ADC_RegularChannelConfig(ADC1,ADC_Channel_14,1,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC1,ADC_Channel_15,2,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC1,ADC_Channel_9,3,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC1,ADC_Channel_8,4,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC1,ADC_Channel_2,5,ADC_SampleTime_71Cycles5);
        ADC_DMACmd(ADC1,ENABLE);       

        //ADC2 configuration -Slave
        ADC_InitStructure.ADC_Mode=ADC_Mode_RegSimult;
        ADC_InitStructure.ADC_ScanConvMode=ENABLE;
        ADC_InitStructure.ADC_ContinuousConvMode=DISABLE;
        ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;
        ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right;
        ADC_InitStructure.ADC_NbrOfChannel=4;
        ADC_Init(ADC2,&ADC_InitStructure);

        ADC_RegularChannelConfig(ADC2,ADC_Channel_0,1,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC2,ADC_Channel_5,2,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC2,ADC_Channel_7,3,ADC_SampleTime_71Cycles5);
        ADC_RegularChannelConfig(ADC2,ADC_Channel_6,4,ADC_SampleTime_71Cycles5);

        ADC_ExternalTrigConvCmd(ADC2,ENABLE);
        ADC_ExternalTrigConvCmd(ADC1,ENABLE);
       
        ADC_Cmd(ADC1,ENABLE);
        ADC_ResetCalibration(ADC1);
        while(ADC_GetResetCalibrationStatus(ADC1));
        ADC_StartCalibration(ADC1);
        while(ADC_GetCalibrationStatus(ADC1));
       
        ADC_Cmd(ADC2,ENABLE);
        ADC_ResetCalibration(ADC2);
        while(ADC_GetResetCalibrationStatus(ADC2));
        ADC_StartCalibration(ADC2);
        while(ADC_GetCalibrationStatus(ADC2));
       
        DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);
        DMA_Cmd(DMA1_Channel1,ENABLE);

老哥  我这个项目也是需要 ADC1两路，ADC2两路。。。。。。感觉配置的没啥问题，但是结果就是不太对！

同步规则通道应该一样长，ADC1和ADC2都为5路；并且ADC_DMACmd(ADC2,ENABLE);别忘了。同步模式下，ADC1为外部触发时，ADC2应配置为软件触发，防止意外触发ADC2，所以 ADC_ExternalTrigConvCmd(ADC2,ENABLE);可以删掉