战舰miniadc多通道，其中一通道的值一直封顶，其进行ad采样时采样值错误，另，相邻两引脚采样互相影响，求大能帮忙

求徒 · 发表于 2016-7-21 21:35:02

ADC1ConvertedVoltage[0] = 0;
         ADC1ConvertedVoltage[1] = 0;
         ADC1ConvertedVoltage[2] = 0;
         ADC1ConvertedVoltage[3] = 0;
         for(i=0;i<4;i++)
         {
            for(j=0;j<64;j++)
            {
                  ADC1ConvertedVoltage[i] += ADC1ConvertedValue[j][i];
            }
         ADC1ConvertedVoltage[i] = ADC1ConvertedVoltage[i]/64;
         }
         temp1 = ADC1ConvertedVoltage[0]*3.0/4096;
         temp2 = ADC1ConvertedVoltage[1]*3.0/4096;
         temp3 = ADC1ConvertedVoltage[2]*3.0/4096;
         temp4 = ADC1ConvertedVoltage[3]*3.0/4096;
         adcx=temp1;
LCD_ShowxNum(124,110,temp1,1,16,0);      //ÏÔê¾μçÑ1ÖμÕûêy2¿·Ö
temp1-=adcx;
temp1*=1000;
LCD_ShowxNum(140,110,temp1,3,16,0X80); //ÏÔê¾μçÑ1ÖμμÄD¡êy2¿·Ö

         adcx=temp2;
LCD_ShowxNum(124,130,temp2,1,16,0);      //ÏÔê¾μçÑ1ÖμÕûêy2¿·Ö
temp2-=adcx;
temp2*=1000;
LCD_ShowxNum(140,130,temp2,3,16,0X80); //ÏÔê¾μçÑ1ÖμμÄD¡êy2¿·Ö

         adcx=temp3;
LCD_ShowxNum(124,150,temp3,1,16,0);      //ÏÔê¾μçÑ1ÖμÕûêy2¿·Ö
temp3-=adcx;
temp3*=1000;
LCD_ShowxNum(140,150,temp3,3,16,0X80); //ÏÔê¾μçÑ1ÖμμÄD¡êy2¿·Ö

         adcx=temp4;
LCD_ShowxNum(124,170,temp4,1,16,0);      //ÏÔê¾μçÑ1ÖμÕûêy2¿·Ö
temp4-=adcx;
temp4*=1000;
LCD_ShowxNum(140,170,temp4,3,16,0X80); //ÏÔê¾μçÑ1ÖμμÄD¡êy2¿·Ö
这是adc值提取后的运算程序
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 , ENABLE );    //ê1ÄüADC1í¨μàê±Öó

RCC_ADCCLKConfig(RCC_PCLK2_Div6); //éèÖÃADC·ÖÆμòò×ó6 72M/6=12,ADC×î′óê±¼ä2»Äü3¬1y14M

RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE);    //ADC1¸′Î»
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE); //¸′Î»½áêø

//PA1 ×÷ÎaÄ￡Äaí¨μàêäèëòy½Å
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //Ä￡Äaêäèëòy½Å

GPIO_Init(GPIOA, &GPIO_InitStructure);

// ADC_DeInit(ADC1);  //¸′Î»ADC1,½«íaéè ADC1 μÄè«2¿¼Ä′æÆ÷ÖØéèÎaè±ê¡Öμ

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1¤×÷Ä￡ê½:ADC1oíADC21¤×÷Ôú¶àá￠Ä￡ê½
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //Ä￡êy×a»»1¤×÷Ôúμ￥í¨μàÄ￡ê½
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //Ä￡êy×a»»1¤×÷Ôúμ￥′Î×a»»Ä￡ê½
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //×a»»óéèí¼t¶ø2»êÇía2¿′￥·￠Æô¶ˉ
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADCêy¾Yóò¶ÔÆë
ADC_InitStructure.ADC_NbrOfChannel = 4; //Ë3Dò½øDD1æÔò×a»»μÄADCí¨μàμÄêyÄ¿
ADC_Init(ADC1, &ADC_InitStructure); //¸ù¾YADC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèADCxμÄ¼Ä′æÆ÷

ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 4, ADC_SampleTime_239Cycles5);

//ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

ADC_DMACmd(ADC1, ENABLE);

ADC_Cmd(ADC1, ENABLE); //ê1ÄüÖ¸¶¨μÄADC1

ADC_ResetCalibration(ADC1); //ê1Äü¸′Î»D￡×¼

while(ADC_GetResetCalibrationStatus(ADC1)); //μè′y¸′Î»D￡×¼½áêø

ADC_StartCalibration(ADC1);    //¿aÆôADD￡×¼

while(ADC_GetCalibrationStatus(ADC1));    //μè′yD￡×¼½áêø
adc初始化
MYDMA_Config(DMA1_Channel1,(u32)ADC1_DR_Address,(u32)&ADC1ConvertedValue,256);//DMA1í¨μà1,íaéèÎaadc¼Ä′æÆ÷,′æ′￠Æ÷ADC1ConvertedValueêy×é,3¤256.
dma初始化
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE );    //ê1ÄüDACí¨μàê±Öó

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;    // ¶Ë¿úÅäÖÃ
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;    //Ä￡Äaêäèë
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_4) ;//PA.4 êä3ö¸ß

DAC_InitType.DAC_Trigger=DAC_Trigger_None; //2»ê1óÃ′￥·￠1|Äü TEN1=0
DAC_InitType.DAC_WaveGeneration=DAC_WaveGeneration_None;//2»ê1óÃ2¨DÎ·￠éú
DAC_InitType.DAC_LFSRUnmask_TriangleAmplitude=DAC_LFSRUnmask_Bit0;//Æá±Î¡￠·ùÖμéèÖÃ
DAC_InitType.DAC_OutputBuffer=DAC_OutputBuffer_Disable ; //DAC1êä3ö»o′æ1Ø±Õ BOFF1=1
  DAC_Init(DAC_Channel_1,&DAC_InitType);    //3õê¼»ˉDACí¨μà1

DAC_Cmd(DAC_Channel_1, ENABLE);  //ê1ÄüDAC2

  DAC_SetChannel1Data(DAC_Align_12b_R, 0);  //12Î»óò¶ÔÆëêy¾Y¸ñê½éèÖÃDACÖμ
DAC初始化
DAC_SetChannel1Data(DAC_Align_12b_R, 0);
DMA_Cmd(DMA1_Channel1, ENABLE);    //Æô¶ˉDMAí¨μà
ADC_SoftwareStartConvCmd(ADC1, ENABLE);    //èí¼tÆô¶ˉAD×a»»
注释：adc的4号通道和dac共用一个引脚

求徒 · 发表于 2016-7-21 21:38:18

这是程序

小叶 · 发表于 2016-7-22 08:25:13

与资源，加收藏

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战舰miniadc多通道，其中一通道的值一直封顶，其进行ad采样时采样值错误，另，相邻两引脚采样互相影响，求大能帮忙

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