STM32规则组ADC转换单通道查询方式源代码

ID:198180 · 发表于 2017-5-8 16:02

STM32 规则组转换 ADC转换单通道查询方式源代码

stm32单片机源程序：

//通过串口实时打印出模拟量通道PC0采集的电压数值。
//PC0--CH10
//电位器顺时针电压变小
/*ADC单次模式，采集单通道，50次取平均值，查询方式*/
#include "pbdata.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void USART_Configuration(void);
void ADC_Configuration(void);
int fputc(int ch,FILE *f)
{
USART_SendData(USART1,(u8)ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return ch;
}
int main(void)
{
u32 ad=0;
u8 i;
RCC_Configuration(); //系统时钟初始化
GPIO_Configuration();//端口初始化
USART_Configuration();
NVIC_Configuration();
ADC_Configuration();
while(1)
{
ad=0;
for(i=0;i<50;i++)
{
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //启动转换 ADON=1;
while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC)==RESET);
ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
ad=ad+ADC_GetConversionValue(ADC1);
}
ad=ad/50;
printf("U=%f\r\n",3.3/4095*ad);//实际电压值 12位精度
delay_ms(1000);
}
}
void RCC_Configuration(void)
{
SystemInit();//72m
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);//12M 最大14M
}
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;//ADin
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //模拟输入
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);
}
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 ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode=ADC_Mode_Independent; //ADC1 ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode=DISABLE; //工作在单通道模式
ADC_InitStructure.ADC_ContinuousConvMode=DISABLE; //模数转换工作在单次模式
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=1; //顺序进行转换的通道数
ADC_Init(ADC1,&ADC_InitStructure);
ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_7Cycles5);//选择ADC1通道，
ADC_Cmd(ADC1,ENABLE);//使能指定的ADC
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
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