adc.c
代码语言：javascript复制#include "adc.h"
uint16_t ADC_Converted_Value[ADC_NOFCHANNEL]={0,0,0,0,0,0,0,0,0,0};
static void AdcGpioInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(ADC_GPIO_CLK0 | ADC_GPIO_CLK1,ENABLE);
//PA0~PA7
GPIO_InitStructure.GPIO_Pin = ADC_GPIO_PIN0 | ADC_GPIO_PIN1 | ADC_GPIO_PIN2 |
ADC_GPIO_PIN3 | ADC_GPIO_PIN4 | ADC_GPIO_PIN5 |
ADC_GPIO_PIN7 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(ADC_GPIO_PORT0,&GPIO_InitStructure);
//PB0 PB1
GPIO_InitStructure.GPIO_Pin = ADC_GPIO_PIN8 | ADC_GPIO_PIN9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(ADC_GPIO_PORT1,&GPIO_InitStructure);
}
static void AacModeConfig(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
RCC_APB2PeriphClockCmd(ADC_CLK,ENABLE);
//复位
DMA_DeInit(ADC_DMA_CHANNEL);
//配置dma
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(ADC1->DR)); //ADC数据寄存器地址
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_Converted_Value; //内部SRAM的变量
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //数据源来自外设
DMA_InitStructure.DMA_BufferSize = ADC_NOFCHANNEL; //缓冲区为10
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //地址不递增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable; //存储器地址固定
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据大小为两个字节
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //存储数据大小为两个字节
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //循环传输模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA传输通道优先级最高
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //禁止存储器到存储器模式
//初始化DMA
DMA_Init(ADC_DMA_CHANNEL,&DMA_InitStructure);
DMA_Cmd(ADC_DMA_CHANNEL,ENABLE);
//ADC独立通道模式
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //扫描模式
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续转换模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //软件触发开启
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //转换结果右对齐
ADC_InitStructure.ADC_NbrOfChannel = ADC_NOFCHANNEL; //转换通道十个
//初始化ADC
ADC_Init(ADC1,&ADC_InitStructure);
//配置ADC时钟为 PCLK2的6分频 72/6=12MHz ADC最大时间尽量不超过14M
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//配置ADC通道转换顺序为1，第一个转换，采样时间为239.5个时钟周期采集周期长一点越精确
//ADC_RegularChannelConfig(ADC1,ADC_CHANNEL0,0,ADC_SampleTime_239Cycles5);//PA0
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL1,1,ADC_SampleTime_239Cycles5);//PA1
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL2,2,ADC_SampleTime_239Cycles5);//PA2
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL3,3,ADC_SampleTime_239Cycles5);//PA3
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL4,4,ADC_SampleTime_239Cycles5);//PA4
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL5,5,ADC_SampleTime_239Cycles5);//PA5
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL6,6,ADC_SampleTime_239Cycles5);//PA6
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL7,7,ADC_SampleTime_239Cycles5);//PA7
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL8,8,ADC_SampleTime_239Cycles5);//PB0
ADC_RegularChannelConfig(ADC1,ADC_CHANNEL9,9,ADC_SampleTime_239Cycles5);//PB1
ADC_DMACmd(ADC1,ENABLE);
ADC_Cmd(ADC1,ENABLE);
//校准寄存器
ADC_ResetCalibration(ADC1);
//等待校准寄存器初始化完成
while(ADC_GetResetCalibrationStatus(ADC1));
//开始校准
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
//软件触发ADC转换
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
}
void AdcInit(void)
{
AdcGpioInit();
AacModeConfig();
}adc.h
代码语言：javascript复制#ifndef _ADC_H_
#define _ADC_H_
#include "stm32f10x.h"
#define ADC_NOFCHANNEL 10
#define ADC_CLK RCC_APB2Periph_ADC1
#define ADC_GPIO_CLK0 RCC_APB2Periph_GPIOA
#define ADC_GPIO_PORT0 GPIOA
#define ADC_GPIO_CLK1 RCC_APB2Periph_GPIOB
#define ADC_GPIO_PORT1 GPIOB
#define ADC_DMA_CHANNEL DMA1_Channel1
//PA0
//#define ADC_GPIO_PIN0 GPIO_Pin_0
//#define ADC_CHANNEL0 ADC_Channel_0
//PA1
#define ADC_GPIO_PIN1 GPIO_Pin_1
#define ADC_CHANNEL1 ADC_Channel_1
//PA2
#define ADC_GPIO_PIN2 GPIO_Pin_2
#define ADC_CHANNEL2 ADC_Channel_2
//PA3
#define ADC_GPIO_PIN3 GPIO_Pin_3
#define ADC_CHANNEL3 ADC_Channel_3
//PA4
#define ADC_GPIO_PIN4 GPIO_Pin_4
#define ADC_CHANNEL4 ADC_Channel_4
//PA5
#define ADC_GPIO_PIN5 GPIO_Pin_5
#define ADC_CHANNEL5 ADC_Channel_5
//PA6
#define ADC_GPIO_PIN6 GPIO_Pin_6
#define ADC_CHANNEL6 ADC_Channel_6
//PA7
#define ADC_GPIO_PIN7 GPIO_Pin_7
#define ADC_CHANNEL7 ADC_Channel_7
//PB0
#define ADC_GPIO_PIN8 GPIO_Pin_0
#define ADC_CHANNEL8 ADC_Channel_8
//PB1
#define ADC_GPIO_PIN9 GPIO_Pin_1
#define ADC_CHANNEL9 ADC_Channel_9
void AdcInit(void);
#endif备注：PA0作为第一个采集的通道，目前遇到的情况是顺序采集到的PA0是缓冲区最后一个数据，所以暂时不使用PA0作为ADC采集io，可以使用其他通道进行采集
