STM32F10x ADC多通道采集
1.初始化ADC1
void ADC1_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//独立工作模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE;//扫描方式
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续转换开启
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//外部触发禁止
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//右对齐方式
ADC_InitStructure.ADC_NbrOfChannel = 11; //11个采样通道
ADC_Init(ADC1, &ADC_InitStructure);//调用函数,初始化ADC1
//ADC内置温度传感器使能(要使用片内温度传感器,切忌要开启它)
ADC_TempSensorVrefintCmd(ENABLE);
//常规转换序列1:通道10
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_55Cycles5);
//常规转换序列2:通道16(内部温度传感器),采样时间>2.2us,(239cycles)
ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_55Cycles5); //
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_55Cycles5); //ANdy
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 5, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 6, ADC_SampleTime_55Cycles5); //ANdy
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 7, ADC_SampleTime_55Cycles5); //ANdy
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 8, ADC_SampleTime_55Cycles5); //ANdy
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 9, ADC_SampleTime_55Cycles5); //PA5 Monitor_src
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 10, ADC_SampleTime_55Cycles5); //PA7 Monitor_snk
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 11, ADC_SampleTime_55Cycles5); //SNK_5V
// Enable ADC1
ADC_Cmd(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_DMACmd(ADC1, ENABLE);
// 下面是ADC自动校准,开机后需执行一次,保证精度
// Enable ADC1 reset calibaration register
ADC_ResetCalibration(ADC1);
// Check the end of ADC1 reset calibration register
while(ADC_GetResetCalibrationStatus(ADC1));
// Start ADC1 calibaration
ADC_StartCalibration(ADC1);
// Check the end of ADC1 calibration
while(ADC_GetCalibrationStatus(ADC1));
// ADC自动校准结束---------------
ADC_SoftwareStartConvCmd(ADC1,ENABLE);//开启
}
2.配置DMA
/********************************************************************
***********
* Function Name : DMA_Configuration
* Description : DMA设置:从ADC模块自动读转换结果至内存
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//外设地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value;//内存地址/*自己开辟的数组*/11
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//DMA单向传输方式
//BufferSize=2,因为ADC转换序列有2个通道
//如此设置,使序列1结果放在AD_Value[0],序列2结果放在AD_Value[1]
DMA_InitStructure.DMA_BufferSize = 11; //ANdy 11
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//设置DMA外设递增模式
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //设置DMA内存递增模式
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外设字长
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//内存地址
//循环模式开启,Buffer写满后,自动回到初始地址开始传输
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; // 设置传输模式连续不断的循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//设置DMA优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;// 设置DMA的2个memory中的变量互相访问
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
//配置完成后,启动DMA通道
DMA_Cmd(DMA1_Channel1, ENABLE);
}
3.使用了两个传感器,一个血氧传感器,一个压电脉搏传感器进行了双通道ADC的采集。下面是效果图。代码在:https://download.csdn.net/download/x_uhen/10476975