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            EEPW首頁(yè) > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > STM32多通道ADC規(guī)則轉(zhuǎn)換實(shí)現(xiàn)

            STM32多通道ADC規(guī)則轉(zhuǎn)換實(shí)現(xiàn)

            作者: 時(shí)間:2016-11-28 來(lái)源:網(wǎng)絡(luò) 收藏
            vu16 ADC_RCVTab[160] ;//自己添加


            int main(void)
            {
            #ifdef DEBUG
            debug();
            #endif

            本文引用地址:http://www.biyoush.com/article/201611/322987.htm


            RCC_Configuration();


            NVIC_Configuration();


            GPIO_Configuration();

            LcdShow_Init();

            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//使能DMA時(shí)鐘


            DMA_DeInit(DMA1_Channel1);
            DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//外設(shè)地址
            DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RCVTab;//內(nèi)存地址
            DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//dma傳輸方向單向
            DMA_InitStructure.DMA_BufferSize =160;//設(shè)置DMA在傳輸時(shí)緩沖區(qū)的長(zhǎng)度 word
            DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//設(shè)置DMA的外設(shè)遞增模式,一個(gè)外設(shè)
            DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//設(shè)置DMA的內(nèi)存遞增模式,
            DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外設(shè)數(shù)據(jù)字長(zhǎng)
            DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//內(nèi)存數(shù)據(jù)字長(zhǎng)
            DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//設(shè)置DMA的傳輸模式:連續(xù)不斷的循環(huán)模式
            DMA_InitStructure.DMA_Priority = DMA_Priority_High;//設(shè)置DMA的優(yōu)先級(jí)別
            DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//設(shè)置DMA的2個(gè)memory中的變量互相訪問(wèn)
            DMA_Init(DMA1_Channel1, &DMA_InitStructure);


            DMA_Cmd(DMA1_Channel1, ENABLE);


            ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//獨(dú)立工作模式
            ADC_InitStructure.ADC_ScanConvMode = ENABLE;//掃描方式
            ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//連續(xù)轉(zhuǎn)換
            ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//外部觸發(fā)禁止
            ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//數(shù)據(jù)右對(duì)齊
            ADC_InitStructure.ADC_NbrOfChannel = 8;//用于轉(zhuǎn)換的通道數(shù)
            ADC_Init(ADC1, &ADC_InitStructure);


            ADC_RegularChannelConfig(ADC1, ADC_Channel_8 , 1, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_9 , 2, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 3, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 4, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 5, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 6, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 7, ADC_SampleTime_239Cycles5);
            ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 8, ADC_SampleTime_239Cycles5);


            ADC_DMACmd(ADC1, ENABLE);


            ADC_Cmd(ADC1, ENABLE);


            ADC_ResetCalibration(ADC1);

            while(ADC_GetResetCalibrationStatus(ADC1));


            ADC_StartCalibration(ADC1);

            while(ADC_GetCalibrationStatus(ADC1));


            ADC_SoftwareStartConvCmd(ADC1, ENABLE);

            while(RESET==DMA_GetFlagStatus(DMA1_FLAG_TC1));//自己添加

            while(1)
            {
            vu16 value1 = 0;
            vu16 value2 = 0;
            vu16 value3 = 0;
            vu16 value4 = 0;
            vu16 value5 = 0;
            vu16 value6 = 0;
            vu16 value7 = 0;
            vu16 value8 = 0;
            value1 = average(ADC_RCVTab,0);
            value2 = average(ADC_RCVTab,1);
            value3 = average(ADC_RCVTab,2);
            value4 = average(ADC_RCVTab,3);
            value5 = average(ADC_RCVTab,4);
            value6 = average(ADC_RCVTab,5);
            value7 = average(ADC_RCVTab,6);
            value8 = average(ADC_RCVTab,7);

            u8 num1 = value3 % 10;
            u8 num2 = (value3 / 10) % 10;
            u8 num3= (value3 / 100) % 10;
            u8 num4 = value3 / 1000;
            if (num1 > 9)
            display[3] = num1 + (65 - 10);
            else
            display[3] = num1 + (48-0);

            if (num2 > 9)
            display[2] = num2 +(65 - 10);
            else
            display[2] = num2 + (48 - 0);

            if (num3>9)
            display[1]=num3+(65-10);
            else
            display[1]=num3+(48-0);

            if (num4>9)
            display[0]=num4+(65-10);
            else
            display[0]=num4+(48-0);

            write_string(display);
            delay();
            }
            }

            u16 average(vu16 ADCDataTab[], u16 nChannel)//自己添加
            {
            u16 averagevalue=0, maxvalue=0, minvalue=0xFFFF, i;

            for (i=0;i<20;i++)
            {
            averagevalue += *(ADCDataTab+nChannel+i*8);

            if(*(ADCDataTab+nChannel+i*8)>maxvalue)
            maxvalue=*(ADCDataTab+nChannel+i*8);

            if(*(ADCDataTab+nChannel+i*8)minvalue=*(ADCDataTab+nChannel+i*8);
            }

            return ((averagevalue-maxvalue-minvalue)/18);//這樣會(huì)耗時(shí)不可取 最好用 >>

            }



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