STM32 ADC規(guī)則組注入組多通道多次采集 DMA傳輸 KEIL

ID:198180 · 發(fā)表于 2017-5-9 17:02

stm32單片機(jī)源程序：

//通過串口實(shí)時(shí)打印KEY3 KEY4電壓值。
//每個(gè)通道采集50次
#include "pbdata.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void USART_Configuration(void);
void ADC1_Configuration(void);
void DMA_Configuration(void);
vu16 AD_Value[N][M]; //用來存放ADC轉(zhuǎn)換結(jié)果，也是DMA的目標(biāo)地址 define a N line and M row array
vu16 filterAD[M+1]; //濾波后AD值
vu16 MM;
int fputc(int ch,FILE *f)
{
USART_SendData(USART1,(u8)ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return ch;
}
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
USART_Configuration();
NVIC_Configuration();
ADC1_Configuration();
DMA_Configuration();
while(1)
{
delay_ms(10); //延時(shí)，防止第一次上電或復(fù)位時(shí)，ADC沒有轉(zhuǎn)換完成
filter();
printf("key3=%f\r\n",filterAD[0]*3.3/4095);
printf("key4=%f\r\n",filterAD[1]*3.3/4095);
printf("pot =%f\r\n",filterAD[2]*3.3/4095);
printf("\r\n");
delay_ms(1000);
}
}
void filter(void)
{
vu32 sum=0; //必須初始化為0，否則初值將保持上次調(diào)用值。
vu8 i=0,j=0;
for(i=0;i<M;i++) //M row
{
for(j=0;j<N;j++) //N line
{
sum+=AD_Value[j][i];
}
filterAD[i]=sum/N;
sum=0;
}
}
void RCC_Configuration(void)
{
SystemInit();//72m
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); //GPIOA
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); //USART
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE); //GPIOC
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC
RCC_ADCCLKConfig(RCC_PCLK2_Div6); //12M 最大14M
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //使能DMA傳輸
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//TX
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_3;//ADin: POT K3 K4
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //模擬輸入
GPIO_Init(GPIOC,&GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;//中斷向量
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;//中斷向量
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_Cmd(USART1,ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC);
}
void ADC1_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_DeInit(ADC1); //將外設(shè) ADC1 的全部寄存器重設(shè)為缺省值
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_Mode=ADC_Mode_Independent; //ADC1 ADC2工作在獨(dú)立模式
ADC_InitStructure.ADC_ScanConvMode=ENABLE; //工作在單通道模式（還是掃描模式：多通道模式）
ADC_InitStructure.ADC_ContinuousConvMode=ENABLE; //模數(shù)轉(zhuǎn)換工作在單次模式(還是連續(xù)模式)
ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;//轉(zhuǎn)換由軟件而不是外部觸發(fā)啟動
ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right; //ADC數(shù)據(jù)右對齊
ADC_InitStructure.ADC_NbrOfChannel=M; //順序進(jìn)行轉(zhuǎn)換的通道數(shù)
ADC_Init(ADC1, &ADC_InitStructure); //根據(jù)ADC_InitStruct中指定的參數(shù)初始化外設(shè)ADCx的寄存器
//設(shè)置指定ADC的規(guī)則組通道，設(shè)置它們的轉(zhuǎn)化順序和采樣時(shí)間
//ADC1,ADC通道x,規(guī)則采樣順序值為y,采樣時(shí)間為239.5周期
ADC_RegularChannelConfig(ADC1,ADC_Channel_12,1,ADC_SampleTime_239Cycles5);//選擇ADC1通道12－PC2 KEY3
ADC_RegularChannelConfig(ADC1,ADC_Channel_13,2,ADC_SampleTime_239Cycles5);//選擇ADC1通道13－PC3 KEY4
// ADC_RegularChannelConfig(ADC1,ADC_Channel_10,3,ADC_SampleTime_239Cycles5);//選擇ADC1通道10－PC0 POT
ADC_InjectedSequencerLengthConfig(ADC1,1);//設(shè)置注入組通道的轉(zhuǎn)換序列長度
//設(shè)置指定 ADC 的注入組通道，設(shè)置它們的轉(zhuǎn)化順序和采樣時(shí)間
ADC_InjectedChannelConfig(ADC1, ADC_Channel_10, 1,ADC_SampleTime_239Cycles5); //
ADC_SetInjectedOffset(ADC1,ADC_InjectedChannel_1,0);
ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_None); //選擇定時(shí)器 1 的 TRGO 作為注入轉(zhuǎn)換外部觸發(fā)
ADC_AutoInjectedConvCmd(ADC1, ENABLE); //規(guī)則組轉(zhuǎn)換完成自動轉(zhuǎn)換注入組，適合做ADC通道的擴(kuò)展。
// ADC_ExternalTrigInjectedConvCmd(ADC1,ENABLE); //使用外部觸發(fā)轉(zhuǎn)換時(shí)使能。
// ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE); //規(guī)則組中斷使能
ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE); //注入組中斷使能
ADC_ClearFlag(ADC1, ADC_FLAG_JEOC); //注入組轉(zhuǎn)換結(jié)束標(biāo)志位清零防止第一次轉(zhuǎn)換時(shí)出錯(cuò)。
ADC_DMACmd(ADC1, ENABLE); // 開啟ADC的DMA支持（要實(shí)現(xiàn)DMA功能，還需獨(dú)立配置DMA通道等參數(shù)）
ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
ADC_ResetCalibration(ADC1); //重置校準(zhǔn)器
while(ADC_GetResetCalibrationStatus(ADC1)); //獲取校準(zhǔn)狀態(tài)
ADC_StartCalibration(ADC1); //開始指定ADC的校準(zhǔn)狀態(tài)
while(ADC_GetCalibrationStatus(ADC1)); //獲取指定ADC的校準(zhǔn)程序
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //使能軟件啟動規(guī)則組轉(zhuǎn)換功能
// ADC_SoftwareStartInjectedConvCmd(ADC1,ENABLE); //使能ADCx 軟件啟動注入組轉(zhuǎn)換功能啟動轉(zhuǎn)換
}
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel1); //將DMA的通道1寄存器重設(shè)為缺省值
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA外設(shè)ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value; //DMA內(nèi)存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?外設(shè)作為數(shù)據(jù)傳輸?shù)膩碓?br />
DMA_InitStructure.DMA_BufferSize = M*N; //DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外設(shè)地址寄存器不變
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外設(shè)數(shù)據(jù)寬度為16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //內(nèi)存數(shù)據(jù)寬度為16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循環(huán)緩存模式，當(dāng)傳輸完一次后，重新接著傳送，永不停息。
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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