STM32规则组ADC转换(DMA 多通道单次采集)源程序 -

//通过串口实时打印KEY3 KEY4电压值。
//每个通道采集一次
#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[M]; //用来存放ADC转换结果，也是DMA的目标地址
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)
{
printf("AD_Value[0]=%f\r\n",AD_Value[0]*3.3/4095);
printf("AD_Value[1]=%f\r\n",AD_Value[1]*3.3/4095);
printf("AD_Value[2]=%f\r\n",AD_Value[2]*3.3/4095);
delay_ms(1000);
// printf("value[%d]=\t%d\r\n",i,value[i]);
}
}
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传输
}
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; //模拟输入
GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;//ADin: sensor1 sensor2 VOC
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //模拟输入
GPIO_Init(GPIOA,&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;//中断向量
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); //将外设 ADC1 的全部寄存器重设为缺省值
ADC_InitStructure.ADC_Mode=ADC_Mode_Independent; //ADC1 ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode=ENABLE; //工作在单通道模式（还是扫描模式：多通道模式）
ADC_InitStructure.ADC_ContinuousConvMode=ENABLE; //模数转换工作在单次模式(还是连续模式)
ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;//转换由软件而不是外部触发启动
ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right; //ADC数据右对齐
ADC_InitStructure.ADC_NbrOfChannel=M; //顺序进行转换的通道数
ADC_Init(ADC1, &ADC_InitStructure); //根据ADC_InitStruct中指定的参数初始化外设ADCx的寄存器
//设置指定ADC的规则组通道，设置它们的转化顺序和采样时间
//ADC1,ADC通道x,规则采样顺序值为y,采样时间为239.5周期
// ADC_RegularChannelConfig(ADC1,ADC_Channel_0, 1,ADC_SampleTime_239Cycles5);//选择ADC1通道0 －PA0 SENSOR1
// ADC_RegularChannelConfig(ADC1,ADC_Channel_1, 2,ADC_SampleTime_239Cycles5);//选择ADC1通道1 －PA1 SENSOR2
ADC_RegularChannelConfig(ADC1,ADC_Channel_10,3,ADC_SampleTime_239Cycles5);//选择ADC1通道10－PC0 POT
ADC_RegularChannelConfig(ADC1,ADC_Channel_12,1,ADC_SampleTime_239Cycles5);//选择ADC1通道12－PC2 KEY3
ADC_RegularChannelConfig(ADC1,ADC_Channel_13,2,ADC_SampleTime_239Cycles5);//选择ADC1通道13－PC3 KEY4
//
ADC_DMACmd(ADC1, ENABLE); // 开启ADC的DMA支持（要实现DMA功能，还需独立配置DMA通道等参数）
ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
ADC_ResetCalibration(ADC1); //重置校准器
while(ADC_GetResetCalibrationStatus(ADC1));//获取校准状态
ADC_StartCalibration(ADC1);//开始指定ADC的校准状态
while(ADC_GetCalibrationStatus(ADC1)); //获取指定ADC的校准程序
// ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE); //中断使能
ADC_SoftwareStartConvCmd(ADC1,ENABLE);//使能软件启动功能
}
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel1); //将DMA的通道1寄存器重设为缺省值
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA外设ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value; //DMA内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //内存作为数据传输的目的地外设作为数据传输的来源
DMA_InitStructure.DMA_BufferSize = M; //DMA通道的DMA缓存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址寄存器不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址寄存器递增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //数据宽度为16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //数据宽度为16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环缓存模式，当传输完一次后，重新接着传送，永不停息。
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA通道 x拥有高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x没有设置为内存到内存传输
DMA_Init(DMA1_Channel1, &DMA_InitStructure); //根据DMA_InitStruct中指定的参数初始化DMA的通道
DMA_Cmd(DMA1_Channel1, ENABLE); //启动DMA通道
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