STM32F4 驱动 AD7606 16位8通道ADC的方案，支持并行接口、高速采样、多通道同步采集，适用于工业数据采集、电力监控、精密测量等场景。

一、系统架构

STM32F4 + AD7606 采集系统架构：
├── 硬件层
│   ├── STM32F407ZGT6 微控制器
│   ├── AD7606 16位8通道ADC模块
│   ├── 信号调理电路（±10V输入）
│   ├── 基准电压源（2.5V/4.096V）
│   └── 隔离电源与保护电路
├── 驱动层
│   ├── FSMC并行接口驱动
│   ├── GPIO控制（CONVST、BUSY、RESET）
│   ├── DMA数据传输
│   └── 中断处理
├── 应用层
│   ├── 多通道同步采样
│   ├── 数据校准与滤波
│   ├── 采样率动态配置
│   └── 数据存储与传输
└── 接口层
    ├── 串口数据输出
    ├── USB虚拟串口
    ├── Ethernet数据上传
    └── SD卡数据存储

二、硬件连接

2.1 AD7606与STM32F4连接

AD7606引脚    STM32F4引脚    功能说明
DB0-DB15     PD0-PD15      数据总线（16位并行）
CS           PG9          片选信号
RD/SCLK       PG10         读信号
WR/DC        PG11         写信号
A0-A2        PF0-PF2      地址线
CONVST_A     PG12         转换启动A
CONVST_B     PG13         转换启动B
BUSY         PG14         忙信号
RESET        PG15         复位信号
OS0-OS2      PE0-PE2      过采样配置
RANGE        PE3          量程选择（±5V/±10V）
STBY         PE4          待机控制
PAR/SER      PE5          并行/串行选择

2.2 信号调理电路

输入信号 → 电压跟随器 → 抗混叠滤波 → AD7606输入
±10V输入范围，支持8通道同步采样

三、核心代码实现

3.1 头文件定义 (ad7606.h)

#ifndef AD7606_H
#define AD7606_H

#include "stm32f4xx.h"
#include <stdint.h>
#include <stdbool.h>

// AD7606配置参数
#define AD7606_CHANNELS        8           // 通道数量
#define AD7606_RESOLUTION      16          // 分辨率16位
#define AD7606_MAX_SAMPLE_RATE 200000      // 最大采样率200kHz
#define AD7606_VREF            2.5f        // 基准电压2.5V
#define AD7606_RANGE_10V       10.0f       // ±10V量程
#define AD7606_RANGE_5V        5.0f        // ±5V量程

// 过采样配置
typedef enum {
    AD7606_OS_NONE = 0,      // 无过采样
    AD7606_OS_2X = 1,       // 2倍过采样
    AD7606_OS_4X = 2,       // 4倍过采样
    AD7606_OS_8X = 3,       // 8倍过采样
    AD7606_OS_16X = 4,      // 16倍过采样
    AD7606_OS_32X = 5,       // 32倍过采样
    AD7606_OS_64X = 6        // 64倍过采样
} AD7606_OverSample;

// 量程配置
typedef enum {
    AD7606_RANGE_10V = 0,   // ±10V量程
    AD7606_RANGE_5V = 1    // ±5V量程
} AD7606_Range;

// 工作模式
typedef enum {
    AD7606_MODE_SINGLE = 0,  // 单次转换
    AD7606_MODE_CONTINUOUS  // 连续转换
} AD7606_Mode;

// AD7606数据结构
typedef struct {
    int16_t raw_data[AD7606_CHANNELS];      // 原始数据
    float voltage[AD7606_CHANNELS];          // 电压值
    uint32_t sample_count;                  // 采样计数
    uint32_t error_count;                   // 错误计数
    uint8_t busy_flag;                      // 忙标志
    uint8_t conversion_done;                // 转换完成标志
} AD7606_Data;

// 系统配置结构
typedef struct {
    AD7606_Range range;                    // 量程
    AD7606_OverSample oversample;          // 过采样
    AD7606_Mode mode;                      // 工作模式
    uint32_t sample_rate;                  // 采样率
    uint8_t channels_enable[AD7606_CHANNELS]; // 通道使能
    float calibration_gain[AD7606_CHANNELS];  // 校准增益
    float calibration_offset[AD7606_CHANNELS]; // 校准偏移
} AD7606_Config;

// 全局变量声明
extern AD7606_Data g_ad7606_data;
extern AD7606_Config g_ad7606_config;

// 函数声明
void AD7606_Init(void);
void AD7606_Reset(void);
void AD7606_Configure(AD7606_Range range, AD7606_OverSample oversample);
void AD7606_StartConversion(void);
void AD7606_StopConversion(void);
void AD7606_ReadChannels(void);
int16_t AD7606_ReadChannel(uint8_t channel);
float AD7606_GetVoltage(uint8_t channel);
void AD7606_SetSampleRate(uint32_t rate);
void AD7606_Calibrate(uint8_t channel, float known_voltage);
void AD7606_DataProcess(void);

// 底层接口函数
void AD7606_FSMC_Init(void);
void AD7606_GPIO_Init(void);
void AD7606_WriteReg(uint8_t reg, uint16_t data);
uint16_t AD7606_ReadReg(uint8_t reg);
void AD7606_StartConvert(void);
uint8_t AD7606_CheckBusy(void);
void AD7606_WaitBusy(void);

#endif // AD7606_H

3.2 FSMC接口驱动 (ad7606_fsmc.c)

#include "ad7606.h"
#include "delay.h"

// 全局变量
AD7606_Data g_ad7606_data;
AD7606_Config g_ad7606_config;

// FSMC Bank1 NOR/SRAM1 基地址
#define AD7606_BASE_ADDR    0x60000000
#define AD7606_REG_ADDR     *(volatile uint16_t *)(AD7606_BASE_ADDR)

// FSMC初始化
void AD7606_FSMC_Init(void)
{
    FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
    FSMC_NORSRAMTimingInitTypeDef readTiming;
    FSMC_NORSRAMTimingInitTypeDef writeTiming;
    
    // 使能FSMC时钟
    RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);
    
    // 读时序配置
    readTiming.FSMC_AddressSetupTime = 0x01;       // 地址建立时间
    readTiming.FSMC_AddressHoldTime = 0x00;        // 地址保持时间
    readTiming.FSMC_DataSetupTime = 0x05;          // 数据建立时间
    readTiming.FSMC_BusTurnAroundDuration = 0x00;  // 总线周转时间
    readTiming.FSMC_CLKDivision = 0x00;            // 时钟分频
    readTiming.FSMC_DataLatency = 0x00;            // 数据延迟
    readTiming.FSMC_AccessMode = FSMC_AccessMode_A; // 访问模式A
    
    // 写时序配置
    writeTiming.FSMC_AddressSetupTime = 0x01;
    writeTiming.FSMC_AddressHoldTime = 0x00;
    writeTiming.FSMC_DataSetupTime = 0x05;
    writeTiming.FSMC_BusTurnAroundDuration = 0x00;
    writeTiming.FSMC_CLKDivision = 0x00;
    writeTiming.FSMC_DataLatency = 0x00;
    writeTiming.FSMC_AccessMode = FSMC_AccessMode_A;
    
    // FSMC配置
    FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
    FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
    FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
    FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
    FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
    FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
    FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
    FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
    FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
    FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readTiming;
    FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &writeTiming;
    
    FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
    FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
}

// GPIO初始化
void AD7606_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    
    // 使能GPIO时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | 
                          RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | 
                          RCC_AHB1Periph_GPIOE | RCC_AHB1Periph_GPIOG, ENABLE);
    
    // 数据总线PD0-PD15
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
                                  GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7 |
                                  GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 |
                                  GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOD, &GPIO_InitStructure);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource0, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource1, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource3, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource4, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource7, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource8, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource9, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource10, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource11, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_FSMC);
    
    // 控制信号PG9-PG15
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 |
                                  GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_Init(GPIOG, &GPIO_InitStructure);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource9, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource10, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource11, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource12, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource13, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource14, GPIO_AF_FSMC);
    GPIO_PinAFConfig(GPIOG, GPIO_PinSource15, GPIO_AF_FSMC);
    
    // 过采样配置PE0-PE2
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOE, &GPIO_InitStructure);
    
    // 量程选择PE3
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_Init(GPIOE, &GPIO_InitStructure);
    
    // 待机控制PE4
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_Init(GPIOE, &GPIO_InitStructure);
    
    // 并行/串行选择PE5
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_Init(GPIOE, &GPIO_InitStructure);
    
    // 默认配置
    GPIO_SetBits(GPIOE, GPIO_Pin_5);  // 选择并行模式
    GPIO_ResetBits(GPIOE, GPIO_Pin_4); // 退出待机模式
}

// 写寄存器
void AD7606_WriteReg(uint8_t reg, uint16_t data)
{
    // 对于AD7606，通常通过GPIO直接控制，不使用寄存器写入
    // 这里预留接口用于特殊配置
    UNUSED(reg);
    UNUSED(data);
}

// 读寄存器
uint16_t AD7606_ReadReg(uint8_t reg)
{
    // 读取AD7606数据
    return AD7606_REG_ADDR;
}

// 启动转换
void AD7606_StartConvert(void)
{
    // 拉低CONVST_A和CONVST_B启动转换
    GPIO_ResetBits(GPIOG, GPIO_Pin_12 | GPIO_Pin_13);
    Delay_us(1);  // 保持至少25ns
    GPIO_SetBits(GPIOG, GPIO_Pin_12 | GPIO_Pin_13);
}

// 检查忙状态
uint8_t AD7606_CheckBusy(void)
{
    return GPIO_ReadInputDataBit(GPIOG, GPIO_Pin_14) ? 1 : 0;
}

// 等待转换完成
void AD7606_WaitBusy(void)
{
    uint32_t timeout = 100000;  // 超时计数
    while(AD7606_CheckBusy() && timeout--);
}

3.3 AD7606主驱动 (ad7606.c)

#include "ad7606.h"
#include "usart.h"

// 初始化AD7606
void AD7606_Init(void)
{
    printf("AD7606初始化开始...\r\n");
    
    // 初始化FSMC接口
    AD7606_FSMC_Init();
    
    // 初始化GPIO
    AD7606_GPIO_Init();
    
    // 复位AD7606
    AD7606_Reset();
    
    // 默认配置
    g_ad7606_config.range = AD7606_RANGE_10V;
    g_ad7606_config.oversample = AD7606_OS_NONE;
    g_ad7606_config.mode = AD7606_MODE_SINGLE;
    g_ad7606_config.sample_rate = 10000;  // 10kHz采样率
    
    // 初始化校准参数
    for(int i = 0; i < AD7606_CHANNELS; i++)
    {
        g_ad7606_config.channels_enable[i] = 1;
        g_ad7606_config.calibration_gain[i] = 1.0f;
        g_ad7606_config.calibration_offset[i] = 0.0f;
        g_ad7606_data.voltage[i] = 0.0f;
        g_ad7606_data.raw_data[i] = 0;
    }
    
    // 配置AD7606
    AD7606_Configure(g_ad7606_config.range, g_ad7606_config.oversample);
    
    // 初始化数据
    g_ad7606_data.sample_count = 0;
    g_ad7606_data.error_count = 0;
    g_ad7606_data.busy_flag = 0;
    g_ad7606_data.conversion_done = 0;
    
    printf("AD7606初始化完成\r\n");
}

// 复位AD7606
void AD7606_Reset(void)
{
    GPIO_ResetBits(GPIOG, GPIO_Pin_15);  // 拉低复位引脚
    Delay_ms(10);
    GPIO_SetBits(GPIOG, GPIO_Pin_15);   // 释放复位引脚
    Delay_ms(10);
}

// 配置AD7606
void AD7606_Configure(AD7606_Range range, AD7606_OverSample oversample)
{
    // 设置量程
    if(range == AD7606_RANGE_5V)
        GPIO_SetBits(GPIOE, GPIO_Pin_3);   // 高电平选择±5V
    else
        GPIO_ResetBits(GPIOE, GPIO_Pin_3); // 低电平选择±10V
    
    // 设置过采样
    GPIO_WriteBit(GPIOE, GPIO_Pin_0, (oversample & 0x01) ? Bit_SET : Bit_RESET);
    GPIO_WriteBit(GPIOE, GPIO_Pin_1, (oversample & 0x02) ? Bit_SET : Bit_RESET);
    GPIO_WriteBit(GPIOE, GPIO_Pin_2, (oversample & 0x04) ? Bit_SET : Bit_RESET);
    
    // 更新配置
    g_ad7606_config.range = range;
    g_ad7606_config.oversample = oversample;
    
    printf("AD7606配置完成: 量程=%s, 过采样=%dX\r\n", 
           (range == AD7606_RANGE_10V) ? "±10V" : "±5V", 
           1 << oversample);
}

// 启动转换
void AD7606_StartConversion(void)
{
    if(g_ad7606_config.mode == AD7606_MODE_SINGLE)
    {
        AD7606_StartConvert();
        g_ad7606_data.busy_flag = 1;
        g_ad7606_data.conversion_done = 0;
    }
}

// 停止转换
void AD7606_StopConversion(void)
{
    GPIO_SetBits(GPIOE, GPIO_Pin_4);  // 进入待机模式
    g_ad7606_data.busy_flag = 0;
}

// 读取所有通道数据
void AD7606_ReadChannels(void)
{
    uint16_t raw_data;
    float voltage_range;
    
    // 等待转换完成
    AD7606_WaitBusy();
    
    // 读取8个通道数据
    for(int i = 0; i < AD7606_CHANNELS; i++)
    {
        if(g_ad7606_config.channels_enable[i])
        {
            // 读取16位数据
            raw_data = AD7606_ReadReg(0);
            g_ad7606_data.raw_data[i] = (int16_t)raw_data;
            
            // 转换为电压值
            if(g_ad7606_config.range == AD7606_RANGE_10V)
                voltage_range = AD7606_RANGE_10V;
            else
                voltage_range = AD7606_RANGE_5V;
            
            // 计算电压：V = (raw_data / 32768) * voltage_range * gain + offset
            g_ad7606_data.voltage[i] = ((float)g_ad7606_data.raw_data[i] / 32768.0f) * 
                                       voltage_range * g_ad7606_config.calibration_gain[i] + 
                                       g_ad7606_config.calibration_offset[i];
        }
    }
    
    g_ad7606_data.sample_count++;
    g_ad7606_data.busy_flag = 0;
    g_ad7606_data.conversion_done = 1;
}

// 读取单个通道
int16_t AD7606_ReadChannel(uint8_t channel)
{
    if(channel >= AD7606_CHANNELS) return 0;
    
    AD7606_StartConversion();
    AD7606_ReadChannels();
    
    return g_ad7606_data.raw_data[channel];
}

// 获取电压值
float AD7606_GetVoltage(uint8_t channel)
{
    if(channel >= AD7606_CHANNELS) return 0.0f;
    
    return g_ad7606_data.voltage[channel];
}

// 设置采样率
void AD7606_SetSampleRate(uint32_t rate)
{
    if(rate > AD7606_MAX_SAMPLE_RATE)
        rate = AD7606_MAX_SAMPLE_RATE;
    
    g_ad7606_config.sample_rate = rate;
    printf("采样率设置为: %d Hz\r\n", rate);
}

// 校准单个通道
void AD7606_Calibrate(uint8_t channel, float known_voltage)
{
    float measured_voltage;
    float gain;
    
    if(channel >= AD7606_CHANNELS) return;
    
    // 读取当前电压
    AD7606_StartConversion();
    AD7606_ReadChannels();
    measured_voltage = g_ad7606_data.voltage[channel];
    
    // 计算校准增益
    if(fabs(measured_voltage) > 0.001f)
    {
        gain = known_voltage / measured_voltage;
        g_ad7606_config.calibration_gain[channel] = gain;
        g_ad7606_config.calibration_offset[channel] = 0.0f;
        
        printf("通道%d校准完成: 增益=%.6f\r\n", channel, gain);
    }
}

// 数据处理
void AD7606_DataProcess(void)
{
    // 这里可以添加数字滤波、FFT分析等处理
    // 例如：移动平均滤波
    static float filter_buffer[AD7606_CHANNELS][10];
    static uint8_t filter_index = 0;
    
    for(int i = 0; i < AD7606_CHANNELS; i++)
    {
        if(g_ad7606_config.channels_enable[i])
        {
            // 更新滤波缓冲区
            filter_buffer[i][filter_index] = g_ad7606_data.voltage[i];
            
            // 计算移动平均
            float sum = 0;
            for(int j = 0; j < 10; j++)
            {
                sum += filter_buffer[i][j];
            }
            g_ad7606_data.voltage[i] = sum / 10.0f;
        }
    }
    
    filter_index = (filter_index + 1) % 10;
}

3.4 主程序 (main.c)

#include "stm32f4xx.h"
#include "ad7606.h"
#include "usart.h"
#include "delay.h"
#include "led.h"

int main(void)
{
    // 系统初始化
    SystemClock_Init();
    Delay_Init();
    LED_Init();
    USART1_Init(115200);
    
    printf("========================================\r\n");
    printf("    STM32F4 AD7606 数据采集系统\r\n");
    printf("========================================\r\n");
    
    // 初始化AD7606
    AD7606_Init();
    
    // 校准（可选）
    printf("开始校准...\r\n");
    AD7606_Calibrate(0, 2.5f);  // 通道0输入2.5V进行校准
    Delay_ms(1000);
    
    printf("开始数据采集...\r\n");
    
    while(1)
    {
        // 启动转换
        AD7606_StartConversion();
        
        // 读取数据
        AD7606_ReadChannels();
        
        // 数据处理
        AD7606_DataProcess();
        
        // 输出数据
        if(g_ad7606_data.sample_count % 100 == 0)  // 每100次采样输出一次
        {
            printf("采样次数: %lu\r\n", g_ad7606_data.sample_count);
            for(int i = 0; i < AD7606_CHANNELS; i++)
            {
                if(g_ad7606_config.channels_enable[i])
                {
                    printf("CH%d: %.3fV (原始值: %d)\r\n", 
                           i, g_ad7606_data.voltage[i], g_ad7606_data.raw_data[i]);
                }
            }
            printf("----------------------------------------\r\n");
        }
        
        // LED指示
        LED_Toggle();
        
        // 控制采样率
        Delay_us(1000000 / g_ad7606_config.sample_rate);  // 根据采样率延时
    }
}

3.5 DMA传输优化 (ad7606_dma.c)

#include "ad7606.h"
#include "dma.h"

// DMA配置
void AD7606_DMA_Init(void)
{
    DMA_InitTypeDef DMA_InitStructure;
    
    // 使能DMA时钟
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
    
    // DMA配置
    DMA_DeInit(DMA2_Stream0);
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&AD7606_REG_ADDR;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)g_ad7606_data.raw_data;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = AD7606_CHANNELS;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    
    DMA_Init(DMA2_Stream0, &DMA_InitStructure);
    DMA_Cmd(DMA2_Stream0, ENABLE);
}

// 启动DMA传输
void AD7606_StartDMA(void)
{
    // 启动转换
    AD7606_StartConversion();
    
    // 等待转换完成
    AD7606_WaitBusy();
    
    // 启动DMA传输
    DMA_Cmd(DMA2_Stream0, ENABLE);
}

四、编译与部署

4.1 Keil工程配置

Target: STM32F407ZGT6
Device: STM32F407ZG
C/C++:
  Include Paths: .\inc; .\User; .\Hardware
  Define: STM32F40_41xxx, USE_STDPERIPH_DRIVER
Linker:
  Scatter File: STM32_FLASH.sct
Debug:
  Debugger: ST-Link Debugger

4.2 硬件调试要点

1. 电源完整性：AD7606需要干净的模拟电源，建议使用LC滤波
2. 接地：模拟地和数字地单点连接
3. 信号完整性：数据线长度尽量一致，避免反射
4. 基准电压：使用低噪声基准源，如REF5025

4.3 性能优化建议

1. 使用DMA：减少CPU干预，提高采样率
2. 双缓冲：避免数据覆盖
3. 中断优化：使用BUSY中断代替轮询
4. 缓存对齐：确保数据缓冲区32字节对齐

参考代码 stm32f4 arm读取芯片ad7606 www.youwenfan.com/contentcsv/72317.html

五、测试验证

5.1 测试程序

// 测试AD7606功能
void AD7606_Test(void)
{
    printf("AD7606功能测试开始...\r\n");
    
    // 测试量程切换
    AD7606_Configure(AD7606_RANGE_10V, AD7606_OS_NONE);
    Delay_ms(100);
    
    AD7606_Configure(AD7606_RANGE_5V, AD7606_OS_NONE);
    Delay_ms(100);
    
    // 测试过采样
    AD7606_Configure(AD7606_RANGE_10V, AD7606_OS_4X);
    Delay_ms(100);
    
    // 读取数据
    for(int i = 0; i < 100; i++)
    {
        AD7606_StartConversion();
        AD7606_ReadChannels();
        
        printf("采样%d: ", i);
        for(int ch = 0; ch < 8; ch++)
        {
            printf("CH%d=%.3fV ", ch, g_ad7606_data.voltage[ch]);
        }
        printf("\r\n");
        
        Delay_ms(100);
    }
    
    printf("AD7606功能测试完成\r\n");
}