AD7606使用方法

news2024/12/27 7:56:53

AD7606是一款8通道最高16位200ksps的AD采样芯片。5V单模拟电源供电，真双极性模拟输入可以选择±10 V，±5 V两种量程。支持串口与并口两种读取方式。

硬件连接方式：

配置引脚	引脚功能	详细说明
OS2 OS1 OS2	过采样率配置	000 1倍过采样率 200K 011 2^3 8倍过采样率 200K/8=25K
RANGE	模拟信号量程配置	0表示正负5V, 1表示正负10V
STBY	待机省电	0有效可开启省电或关断，需配合RANGE脚， RANGE=1 待机 RANGE=0 关断
RESET	复位信号	典型值高脉冲50ns,上电后需给出，给出后转换中断，输出寄存器清零
CONVSTA	前半通道转换开始信号	控制前一半通道V1-V4，过采样末开启时启作用
CONVSTB	后半通道转换开始信号	控制后一半通道V5-V8。CONVSTA，CONVSTB可以并联使用
PAR/SER/BYTE SEL	并行/串行/字节选择	0 并行。1串行（DB15=0）或字节（DB15=1）串行时RD/CLK 作为时钟输入 DB7,DB8作串行输出字节模式下DB14=1 先高8位后低8位，0时相反串行或字节模式下不用数字接口需要接地
RD/SCLK	读取/时钟	并行模式：RD输入，RD=0 CS=0时开启输出总线串行模式：CLK时钟输入
CS	片选位	低电平有效
REF SELECT	外部/内部基准选择	0：外部基准 REF需要输入2.5V 1：内部基准 REF端可提供2.5V基准。
BUSY	忙信号	转换开始变高，转换完成变低。一般用下降沿来读数
FRSTDATA	首数据输出	首数据时为高，首数据结束时为低，初始为高阻态

并口读取STM32F407硬件连接

程序代码：

#ifdef AD7606_C
#define AD7606_PRE
#else
#define AD7606_PRE extern
#endif
#include "sys.h"

#define AD7606_Data_CLK RCC_AHB1Periph_GPIOE
#define AD7606_Data_PORT GPIOE
#define AD7606_Data_PIN GPIO_Pin_All

#define AD7606_OS0_CLK RCC_AHB1Periph_GPIOC
#define AD7606_OS0_PORT GPIOC
#define AD7606_OS0_PIN GPIO_Pin_13

#define AD7606_OS1_CLK RCC_AHB1Periph_GPIOC
#define AD7606_OS1_PORT GPIOC
#define AD7606_OS1_PIN GPIO_Pin_14

#define AD7606_OS2_CLK RCC_AHB1Periph_GPIOC
#define AD7606_OS2_PORT GPIOC
#define AD7606_OS2_PIN GPIO_Pin_15

#define AD7606_RANGE_CLK RCC_AHB1Periph_GPIOC
#define AD7606_RANGE_PORT GPIOC
#define AD7606_RANGE_PIN GPIO_Pin_10

#define AD7606_CONVSTA_CLK RCC_AHB1Periph_GPIOC
#define AD7606_CONVSTA_PORT GPIOC
#define AD7606_CONVSTA_PIN GPIO_Pin_9

#define AD7606_CONVSTB_CLK RCC_AHB1Periph_GPIOC
#define AD7606_CONVSTB_PORT GPIOC
#define AD7606_CONVSTB_PIN GPIO_Pin_8

#define AD7606_RESET_CLK RCC_AHB1Periph_GPIOC
#define AD7606_RESET_PORT GPIOC
#define AD7606_RESET_PIN GPIO_Pin_7

#define AD7606_RD_CLK RCC_AHB1Periph_GPIOC
#define AD7606_RD_PORT GPIOC
#define AD7606_RD_PIN GPIO_Pin_6

#define AD7606_CS_CLK RCC_AHB1Periph_GPIOC
#define AD7606_CS_PORT GPIOC
#define AD7606_CS_PIN GPIO_Pin_2

#define AD7606_BUSY_CLK RCC_AHB1Periph_GPIOC
#define AD7606_BUSY_PORT GPIOC
#define AD7606_BUSY_PIN GPIO_Pin_11

#define AD7606_FRSTDATA_CLK RCC_AHB1Periph_GPIOC
#define AD7606_FRSTDATA_PORT GPIOC
#define AD7606_FRSTDATA_PIN GPIO_Pin_12

#define AD7606_RESET_H() GPIO_SetBits(AD7606_RESET_PORT, AD7606_RESET_PIN)
#define AD7606_RESET_L() GPIO_ResetBits(AD7606_RESET_PORT, AD7606_RESET_PIN)

#define AD7606_CS_H() GPIO_SetBits(AD7606_CS_PORT, AD7606_CS_PIN)
#define AD7606_CS_L() GPIO_ResetBits(AD7606_CS_PORT, AD7606_CS_PIN)

#define AD7606_RD_H() GPIO_SetBits(AD7606_RD_PORT, AD7606_RD_PIN)
#define AD7606_RD_L() GPIO_ResetBits(AD7606_RD_PORT, AD7606_RD_PIN)

#define AD7606_RANGE_H() GPIO_SetBits(AD7606_RANGE_PORT, AD7606_RANGE_PIN)
#define AD7606_RANGE_L() GPIO_ResetBits(AD7606_RANGE_PORT, AD7606_RANGE_PIN)

#define AD7606_OS2_H() GPIO_SetBits(AD7606_OS2_PORT, AD7606_OS2_PIN)
#define AD7606_OS2_L() GPIO_ResetBits(AD7606_OS2_PORT, AD7606_OS2_PIN)

#define AD7606_OS1_H() GPIO_SetBits(AD7606_OS1_PORT, AD7606_OS1_PIN)
#define AD7606_OS1_L() GPIO_ResetBits(AD7606_OS1_PORT, AD7606_OS1_PIN)

#define AD7606_OS0_H() GPIO_SetBits(AD7606_OS0_PORT, AD7606_OS0_PIN)
#define AD7606_OS0_L() GPIO_ResetBits(AD7606_OS0_PORT, AD7606_OS0_PIN)

#define READ_AD7606_CS() GPIO_ReadInputDataBit(AD7606_CS_PORT, AD7606_CS_PIN)
#define READ_AD7606_FRSTDATA() GPIO_ReadInputDataBit(AD7606_FRSTDATA_PORT, AD7606_FRSTDATA_PIN)

#define READ_AD7606_DATA() GPIO_ReadInputData(AD7606_Data_PORT)

#define AD7606_OS0 PCout(13)
#define AD7606_OS1 PCout(14)
#define AD7606_OS2 PCout(15)
#define AD7606_RANGE PCout(10)
AD7606_PRE s16 ADCData[512][8];
AD7606_PRE u16 ADCCnt;
// AD7606_PRE struct ADCStrc AD7606_ADC;
AD7606_PRE void ReadAD7606(void);
AD7606_PRE void AD7606Init(void);
AD7606_PRE void ReadAD7606(void);
AD7606_PRE void InitAD7606_Port(void);
AD7606_PRE void AD7606ChipCfg(void);
AD7606_PRE void AD7606ChipReset(void);

#define AD7606_C
#include "main.h"

// struct ADCStrc AD7606_ADC;

//**************************************************
void AD7606Init(void)
{
    InitAD7606_Port();
    AD7606ChipCfg();
    AD7606ChipReset();
    ADCCnt = 0;
}

//**********************************************************************************
void InitAD7606_Port(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;
    RCC_AHB1PeriphClockCmd(AD7606_OS0_CLK | AD7606_Data_CLK, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
    GPIO_InitStructure.GPIO_Pin = AD7606_Data_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(AD7606_Data_PORT, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_InitStructure.GPIO_Pin = AD7606_OS0_PIN | AD7606_OS1_PIN | AD7606_OS2_PIN | AD7606_RANGE_PIN | AD7606_CONVSTA_PIN | AD7606_CONVSTB_PIN;
    GPIO_Init(AD7606_OS0_PORT, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = AD7606_RESET_PIN | AD7606_RD_PIN | AD7606_CS_PIN;
    GPIO_Init(AD7606_RESET_PORT, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = AD7606_CONVSTA_PIN | AD7606_CONVSTB_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(AD7606_CONVSTB_PORT, &GPIO_InitStructure);
    GPIO_PinAFConfig(AD7606_CONVSTB_PORT, GPIO_PinSource8, GPIO_AF_TIM3);
    GPIO_PinAFConfig(AD7606_CONVSTA_PORT, GPIO_PinSource9, GPIO_AF_TIM3);
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Pin = AD7606_BUSY_PIN | AD7606_FRSTDATA_PIN;
    GPIO_Init(AD7606_BUSY_PORT, &GPIO_InitStructure);
    SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource11);
    EXTI_InitStructure.EXTI_Line = EXTI_Line11;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);
}

//***************************************
// 配置7606
void AD7606ChipCfg(void)
{
    AD7606_OS2_L();
    AD7606_OS1_L();
    AD7606_OS0_H();   // 001 两倍过采样率 最大64倍过采样率
    AD7606_RANGE_L(); // L为5V，H为10V
    AD7606_CS_L();    // 片选有效
    AD7606_RD_H();    // 读取拉低 并行模式
}

//***************************************
// 复位7606
void AD7606ChipReset(void)
{
    AD7606_RESET_H();
    __NOP();
    __NOP();
    AD7606_RESET_L();
    __NOP();
    __NOP();
}

//***************************************
// 读数据0~7，0:CI,1:BI,2:CI,3:NC,4:CU,5:BU,6:AU,7:NC
void ReadAD7606(void)
{
    u8 i;
    AD7606_RD_H();
    __NOP();
    AD7606_CS_L();
    __NOP();
    for (i = 0; i < 8; i++)
    {
        AD7606_RD_L();
        __NOP();
        if (READ_AD7606_FRSTDATA())
            i = 0; // 如果7606的第一个数据线为高
        ADCData[ADCCnt][i] = READ_AD7606_DATA();
        AD7606_RD_H();
        __NOP();
    }
    ADCCnt++;
    if (ADCCnt >= 512)
        ADCCnt = 0;
    AD7606_CS_H();
}

void EXTI15_10_IRQHandler(void)
{
    if ((EXTI->PR & EXTI_Line11) != 0) //
    {
        EXTI->PR = EXTI_Line11;
        ReadAD7606();
    }
}

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