stm32 ADC多通道采样例程(HAL库)

#181132183184181132183184135IS61871881891901911921931941951961971981992002012022032042Q5戸第通道按顺.字循环转换，AD匚值也按顺.字存放在ADC_V辽弱数组L中叮voidGet.ADCAverag皂V曰丄口亡（void}El{__for//for(j=Q;j<K;j++)sura[j]+=ABC_VdlBaf[i*N4-j];"衣取各个通道AD匚值总和for(i=3;i<M;i++7ADCValje[i]=stjit.[1]/M;//计鼻平均值^elsevoidGetADCAveraaeV^lae(void)El{--'ain七32_tsun;■aint16t.i;forU=^；i<M;i44)suir.+=ADC_Va13jf[i];ADCValae=sunL/N;//计算"_hL#endif/*USERCODEEND丄*/【代码】：/*USERCODEBEGIN1*/#ifN>1/*多通道按顺序循环转换，ADC值也按顺序存放在ADC_Value数组中*/voidGet_ADC_AverageValue(void){uint32_tsum[N]={0};uint16_ti,j;for(i=0;i<M;i++)//sum[0]对应通道0,sum[1]对应通道1for(j=0;j<N;j++)sum[j]+=ADC_ValBuf[i*N+j];〃获取各个通道ADC值总和for(i=0;i<N;i++)ADC_Value[i]=sum[i]/M;〃计算平均值}#elsevoidGet_ADC_AverageValue(void){uint32_tsum;uint16_ti;for(i=0;i<M;i++)sum+=ADC_ValBuf[i];ADC_Value=sum/N;〃计算平均值

#endif/*USERCODEEND1*/(3)最后我们就可以编写main函数了Length变量是数据的个数，所以直接通过sizeof(ADC_ValBuf)/2来计算得出。首先，我们要在main函数开头的初始化部分调用ADCDMA启动函数，HAL_ADC_Start_DMA()函数中HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&ADC_ValBuf,sizeof(ADC_ValBuf)/2);92939-99596579El92939-99596579El朋100101102MX_GFIC_IniL():Hl<2DMA_Init(};田匚ADCZ_工rdu(门I<K_U5JLRTl_UART_In1r(J://EX_DM?L_Iniit(?;/*USERCODEBEGI32*/H3XADCStartDfcQfihadc丄『(unit32VaiBu±rsizeof(ADCVaiBu±|./2J;DWk/*USERCDDEE3D2檸/*USERCDDEE3D2檸.103JL"105.106当.103JL"105.106当/*U5ERCODE3E3IETWHILE*/107.109110111112113.1141S.119.12024A126127128129130131107.109110111112113.1141S.119.12024A126127128129130131132133134135136137.138-139140141ido-/'■USER3ODEZNDWHILE/*■USERCODEBEGIN3*/if(EtccFlag"-"!}RecFla^O;Get_ADC_AverageVa1he();foz7i=37i<sizeof(ADC¥刊丄血£卜Z2;i++}if(i>^Aii%E=OJtAJU曲.(r，\n"打印出每个通這^衣采祥的数值prinut(rr^dadcvaiBur[i]);printf("XnXn"};rrvn-.f(”计算平均数片各通這的ADC<为：z：fox(i=3;i<5;swiu土(丄打印出计算平览数后每个通道的AD匚值case0:print±(nADC_Channel0VaL-je:%d\n11fADC_Valae[1]|;break;LWU匸1iprintf(TIADCLCTiann^L1Vai-j&:rADCVaL^e：i：|；casecasecase/*USERCODEbzeakp2;printf("ADClt-xeak;3:printf(nADClbreak;4:printf(r,ADClbreak?END3*/ChannelCtiannelChannel-1Val-jc；AECYalac[1]|;Value:%d\n,T,ADCValue[i]|;Value:%d\n11,ADCValue[ij►:【代码】：while(1){/*USERCODEENDWHILE*//*USERCODEBEGIN3*/if(RecFlag==1){RecFlag=0;Get_ADC_AverageValue();for(i=0;i<sizeof(ADC_ValBuf)/2;i++){if(i>4&&i%5==0)printf("\n");//打印出每个通道20次采样的数值printf("%d",ADC_ValBuf[i]);}printf("\n\n");printf("计算平均数后各通道的ADC值为：\n");for(i=0;i<5;i++){switch(i)//打印出计算平均数后每个通道的ADC值{case0:printf("ADC1Channel0Value:%d\n",ADC_Value[i]);break;case1:printf("ADC1Channel1Value:%d\n",ADC_Value[i]);break;case2:printf("ADC1Channel4Value:%d\n",ADC_Value[i]);break;case3:printf("ADC1Channel5Value:%d\n",ADC_Value[i]);break;case4:printf("ADC1Channel6Value:%d\n",ADC_Value[i]);break;}}}}/*USERCODEEND3*/}到这里，我们在cubemx生成的工程文件中增加这些代码，就可以实现了ADC多通道采样。其中比较关键的是:ADC多通道采样需要启用扫描模式并启用DMA接收ADC值(很重要)，中断方式没法在多通道时实现ADC值接收。(4)结果测试首先，我们把通道0接到GND,把通道4和通道6接到3.3V,通道1和通道5不接入电压（悬空），然后用串口调试助手给单片机发送一个数据，按照设计的代码，程序将输出采样的ADC数据。我们可以看到，通道0，20次采样结果都为0；通道1,5显示浮空时的采样数据；通道4,6数值都在4044左右。Iftr.SSCOMV5.13.1口馄堀截据潟試器件者:大1FT丁2頭6O5Edq“，-□X週肠口串口设置显示发送冨字符串小工具誓助联茎作者止PCB打祥降至每款5元顺丰包邮可选杂色！【崙立创盲网］01205404427904044A0120740432790404601211404527944045□12104043279£40450121340412795404401216404527?£404401217404427934046□120S4044279140450120440452791404301201404527?14044012014043279240430120740442792404501213404427954047012144045279640460121540432795404E0121140452794404501207404427914045012054044279140460120440432790404E01202404327904044计箕平均数后各通道的朋匚值药：itElClC1l：=ltltlelUV：=J_ue:UMJClChaimel1Value：1203KDC1CLaimel4Valu^:4044ALC1Clianiiel5Value：2790jVEIC1C1l：=ltltlel6V：=J_ue:4044V青除窗口|打开文件||发送文件惇止|葢赶端口号C0M12USE-SERIALCH340也厂HO显示保存数振厂提收数堀到