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   -> 嵌入式 -> ADS1115 STM32 HAL库驱动 CubeMX -> 正文阅读

[嵌入式]ADS1115 STM32 HAL库驱动 CubeMX

CubeMX的IIC配置

在这里插入图片描述

时钟串口见之前文章;IIC配置只需修改IIC时钟频率,ADS115频率范围如下。ADS1115

.h文件

#ifndef __ADS1115_H__
#define __ADS1115_H__


#include "main.h"
//#ifdef ADS1115

extern I2C_HandleTypeDef hi2c1;


//#define ADS1115_MAX_CHANNEL		4

#define Accuracy 									32768	//ADC单端输入15位精度
//#define ADS1115_ADDRESS_GND					0x90	//ADDR PIN ->GND SLAVE ADDRESS 01001000 发送时要左移1
//#define ADS1115_ADDRESS_VDD						0x92	//ADDR PIN ->VDD
//#define ADS1115_ADDRESS_SDA					0x94	//ADDR PIN ->SDA
//#define ADS1115_ADDRESS_SCL				0x96	//ADDR PIN ->SCL

//*************ADDR Initial********************/
//#define ADS1115_ADDRESS		ADS1115_ADDRESS_GND		//ADDR PIN ->GND
#define ADS1115_ADDRESS_W	ADS1115_ADDRESS|0x00	//write address
#define ADS1115_ADDRESS_R	ADS1115_ADDRESS|0x01	//read address

/************POINTER REGISTER*****************/
#define ADS1115_Pointer_ConverReg			0x00	//Convertion register
#define ADS1115_Pointer_ConfigReg			0x01	//Config register
#define ADS1115_Pointer_LoThreshReg			0x02	//Lo_thresh register
#define ADS1115_Pointer_HiThreshReg			0x03	//Hi_thresh register

/************CONFIG REGISTER*****************/

//Bit[15]
#define ADS1115_OS_OperationalStatus		0x0000		//No Effect
#define ADS1115_OS_SingleConverStart		0x8000		//Begin a single conversion
//Bits[14:12]
#define ADS1115_MUX_Differ_01				0x0000		//AINp=AIN0, AINn=AIN1(default)
#define ADS1115_MUX_Differ_03				0x1000		//AINp=AIN0, AINn=AIN3
#define ADS1115_MUX_Differ_13				0x2000		//AINp=AIN1, AINn=AIN3
#define ADS1115_MUX_Differ_23				0x3000		//AINp=AIN2, AINn=AIN3
#define ADS1115_MUX_Channel_0				0x4000		//AINp=AIN0, AINn=GND
#define ADS1115_MUX_Channel_1				0x5000		//AINp=AIN1, AINn=GND
#define ADS1115_MUX_Channel_2				0x6000		//AINp=AIN2, AINn=GND
#define ADS1115_MUX_Channel_3				0x7000		//AINp=AIN3, AINn=GND
//Bits[11:9]
#define ADS1115_PGA_6144					0x0000		//FS=6.144V
#define ADS1115_PGA_4096					0x0200		//FS=4.096V
#define ADS1115_PGA_2048					0x0400		//FS=2.048V(default)
#define ADS1115_PGA_1024					0x0600		//FS=1.024V
#define ADS1115_PGA_0512					0x0800		//FS=0.512V
#define ADS1115_PGA_0256					0x0A00		//FS=0.256V
//Bit[8]
#define ADS1115_MODE_ContinuConver			0x0000		//Continuous conversion mode
#define ADS1115_MODE_SingleConver			0x0100		//Power-down single-shot mode(default)
//Bits[7:5]
#define ADS1115_DataRate_8					0x0000		//Data Rate = 8
#define ADS1115_DataRate_16					0x0020		//Data Rate = 16
#define ADS1115_DataRate_32					0x0040		//Data Rate = 32
#define ADS1115_DataRate_64					0x0060		//Data Rate = 64
#define ADS1115_DataRate_128				0x0080		//Data Rate = 128(default)
#define ADS1115_DataRate_250				0x00A0		//Data Rate = 250
#define ADS1115_DataRate_475				0x00C0		//Data Rate = 475
#define ADS1115_DataRate_860				0x00E0		//Data Rate = 860
//Bit[4]
#define ADS1115_COMP_MODE_0					0x0000		//Traditional comparator with hysteresis
#define ADS1115_COMP_MODE_1					0x0010		//Window comparator
//Bit[3]
#define ADS1115_COMP_POL_0					0x0000		//Active low
#define ADS1115_COMP_POL_1					0x0008		//Active high
//Bit[2]
#define ADS1115_COMP_LAT_0					0x0000		//Non-latching comparator
#define ADS1115_COMP_LAT_1					0x0004		//Latching comparator
//Bits[1:0]
#define ADS1115_COMP_QUE_0					0x0000		//Assert after one conversion
#define ADS1115_COMP_QUE_1					0x0001		//Assert after two conversion
#define ADS1115_COMP_QUE_2					0x0002		//Assert after four conversion
#define ADS1115_COMP_QUE_3					0x0003		//Disable Comparator

typedef enum 
{
	ADS1115_ADDRESS_GND			=		0x90,   //LAVE ADDRESS 01001000 发送时要左移1
  ADS1115_ADDRESS_VDD				=		0x92,	//ADDR PIN ->VDD  
  ADS1115_ADDRESS_SDA			=		0x94,	//ADDR PIN ->SDA
  ADS1115_ADDRESS_SCL			=	0x96	//ADDR PIN ->SCL

}ADS1115_ADDRESS;

typedef enum
{
  ADS1115_CHANNEL0 = 0U,      //ADC通道0   rank 1
  ADS1115_CHANNEL1,           //通道  1
	ADS1115_CHANNEL2,          //通道  2
	ADS1115_CHANNEL3,          //通道  3
	ADS1115_MAX_CHANNEL
	
}ADS1115_CHANNEL;
typedef struct
{
	  //芯片寄存器设置
    uint16_t OS;
    uint16_t MUX;
    uint16_t PGA;
    uint16_t MODE;
    uint16_t DataRate;
    uint16_t COMP_MODE;
    uint16_t COMP_POL;
    uint16_t COMP_LAT;
    uint16_t COMP_QUE;
	//
	//编程用
	
	ADS1115_CHANNEL CHANNEL;
	
	  ADS1115_ADDRESS ADDRESS;
	 int16_t ADS1115_RawData[4];
	 float ADS1115_Vol[4];
} ADS1115_InitTypeDefine;




//extern int16_t ADS1115_RawData[4];
//extern float ADS1115_CHn_Vol[4];
void ADS1115_Init(void);
void ADS1115_UserConfig_SingleConver(ADS1115_InitTypeDefine* hADS1115 , ADS1115_ADDRESS ADDRESS);
void ADS1115_UserConfig_ContinuConver(ADS1115_InitTypeDefine* ADS1115_InitStruct,ADS1115_ADDRESS ADDRESS);
void ADS1115_Config(ADS1115_InitTypeDefine* ADS1115_InitStruct);

void ADS1115_ReadRawData(ADS1115_InitTypeDefine *ADS1115_InitStruct);
void ADS1115_ScanChannel(ADS1115_InitTypeDefine *ADS1115_InitStruct);
void ADS1115_RawDataToVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct);

void ADS1115_GetVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct);
void ADS1115_GetAverageVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct);

void ADS1115_RefreshAllChannel(ADS1115_InitTypeDefine *ADS1115_InitStruct);



extern ADS1115_InitTypeDefine ADS1115_ADDR_VDD;
extern ADS1115_InitTypeDefine ADS1115_ADDR_GND;


#endif


.c文件

#include "ads1115.h"

//#ifdef ADS1115


ADS1115_InitTypeDefine ADS1115_ADDR_GND;
ADS1115_InitTypeDefine ADS1115_ADDR_VDD;
float ADS1115_CHn_Vol[4];
/**
 * 可供外部调用的全局变量,记录了ADS1115采样的原始16位数据。调用void ADS1115_RefreshAllChannel( )函数可以刷新这个变量。
 * 通过定义宏ADS1115_USE_FILTER,可以将ADS1115的轮询采样数据经过滑动滤波后,保存到ADS1115_RawData[]中。
 * 通过float ADS1115_RawDataToVoltage(int16_t rawData)函数可以将ADS1115_RawData[]换算成对应的电压值。
 */
int16_t ADS1115_RawData[4] = {0};


/**
 * @brief 完成芯片控制端口初始化,并设置初始状态
 */
void ADS1115_Init()
{
	

}


/**
 * @brief Configuration of ADS1115, single-shot
 */
void ADS1115_UserConfig_SingleConver(ADS1115_InitTypeDefine* ADS1115_InitStruct,ADS1115_ADDRESS ADDRESS)
{
	ADS1115_InitStruct->COMP_LAT = ADS1115_COMP_LAT_0;
	ADS1115_InitStruct->COMP_MODE = ADS1115_COMP_MODE_0;
	ADS1115_InitStruct->COMP_POL = ADS1115_COMP_POL_0;
	ADS1115_InitStruct->DataRate = ADS1115_DataRate_475;
	ADS1115_InitStruct->MODE = ADS1115_MODE_SingleConver;
	ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_0;
	ADS1115_InitStruct->OS = ADS1115_OS_SingleConverStart;
	ADS1115_InitStruct->PGA = ADS1115_PGA_4096;
	ADS1115_InitStruct->ADDRESS = ADDRESS;
	ADS1115_InitStruct->CHANNEL = ADS1115_CHANNEL0;
	ADS1115_Config(ADS1115_InitStruct);
	
}


/**
 * @brief Configuration of ADS1115, continuous conversion
 */
void ADS1115_UserConfig_ContinuConver(ADS1115_InitTypeDefine* ADS1115_InitStruct,ADS1115_ADDRESS ADDRESS)
{
	ADS1115_InitStruct->COMP_LAT = ADS1115_COMP_LAT_0;
	ADS1115_InitStruct->COMP_MODE = ADS1115_COMP_MODE_0;
	ADS1115_InitStruct->COMP_POL = ADS1115_COMP_POL_0;
	ADS1115_InitStruct->DataRate = ADS1115_DataRate_475;
	ADS1115_InitStruct->MODE = ADS1115_MODE_ContinuConver;
	ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_0;
	ADS1115_InitStruct->OS = ADS1115_OS_OperationalStatus;
	ADS1115_InitStruct->PGA = ADS1115_PGA_4096;
	ADS1115_Config(ADS1115_InitStruct);
}


/**
 * @brief 配置ADS1115
 * @param ADS1115_InitStruct: 用来配置ADS1115的结构体变量指针
 * @return 配置结果
 * 		@arg: fail
 * 		@arg: success
 */
void ADS1115_Config(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{
	uint16_t Config;
	uint8_t Writebuff[3];

	Config = ADS1115_InitStruct->OS + ADS1115_InitStruct->MUX + ADS1115_InitStruct->PGA + ADS1115_InitStruct->MODE
			+ ADS1115_InitStruct->DataRate + ADS1115_InitStruct->COMP_MODE + ADS1115_InitStruct->COMP_POL
			+ ADS1115_InitStruct->COMP_LAT + ADS1115_InitStruct->COMP_QUE;
  Writebuff[0] = ADS1115_Pointer_ConfigReg;
	Writebuff[1] = (unsigned char) ((Config >> 8) & 0xFF);
	Writebuff[2] = (unsigned char) (Config & 0xFF);
	HAL_I2C_Master_Transmit(&hi2c1, ADS1115_InitStruct->ADDRESS, Writebuff, 3, 100);

}



/**
 * @brief 读取ADS1115当前通道下的原始数据
 * @param rawData: 传入一个int16_t整型变量的指针,ADS1115的原始数据将保存在这个变量中
 * @return 读取结果
 * 		@arg 0: fail
 * 		@arg 1: success
 */

void ADS1115_ReadRawData(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{
	unsigned char Result[2];
	uint8_t Writebuff[1];
	Writebuff[0] = ADS1115_Pointer_ConverReg;
	
	HAL_I2C_Master_Transmit(&hi2c1, ADS1115_InitStruct->ADDRESS, Writebuff, 3, 100);
	
	
	HAL_I2C_Master_Receive(&hi2c1, ADS1115_InitStruct->ADDRESS , Result, 2, 100);
	
	ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]  =  (int16_t) (((Result[0] << 8) & 0xFF00) | (Result[1] & 0xFF));


}


/**
 * @brief Switch the channel of ADS1115
 * @param channel
 */
void ADS1115_ScanChannel(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{
	switch (ADS1115_InitStruct->CHANNEL)
	{
	case ADS1115_CHANNEL0:
		ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_0;
	
	
		break;
	case ADS1115_CHANNEL1:
		ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_1;
		break;
	case ADS1115_CHANNEL2:
		ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_2;
		break;
	case ADS1115_CHANNEL3:
		ADS1115_InitStruct->MUX = ADS1115_MUX_Channel_3;
		break;
	default:
		break;
	}
	ADS1115_Config(ADS1115_InitStruct);
}


/**
 * @brief 将传感器的原始采样数据转化为电压数据,
 * 			根据ADS1115_InitType结构体中包含的增益信息计算
 * @param rawData: 待转换的原始数据
 * @retval 返回经过计算的电压值
 */
void ADS1115_RawDataToVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{
	

	switch (ADS1115_InitStruct->PGA)
	{
	case ADS1115_PGA_0256:
		//voltage = rawData * 0.0078125;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.0078125;
		break;

	case ADS1115_PGA_0512:
	//	voltage = rawData * 0.015625;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.015625;
		break;

	case ADS1115_PGA_1024:
		//voltage = rawData * 0.03125;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.03125;
		break;

	case ADS1115_PGA_2048:
	//	voltage = rawData * 0.0625;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.0625;
		break;

	case ADS1115_PGA_4096:
		//voltage = rawData * 0.125;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.125;
		break;

	case ADS1115_PGA_6144:
	//	voltage = rawData * 0.1875;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = ADS1115_InitStruct->ADS1115_RawData[ADS1115_InitStruct->CHANNEL]* 0.1875;
		break;

	default:
		//voltage = 0;
	ADS1115_InitStruct->ADS1115_Vol[ADS1115_InitStruct->CHANNEL] = 0;
		break;
	}


}


/**
 * @brief 直接获取ADS1115当前通道的电压采样值
 * @return 电压采样值
 */
void ADS1115_GetVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{
	

	ADS1115_ReadRawData(ADS1115_InitStruct);

	ADS1115_RawDataToVoltage(ADS1115_InitStruct);
	
}


/**
 * @brief 获取并计算ADC采样的平均电压值
 * @param num: 计算平均值的数量
 * @retval 电压采样的平均值
 */
void ADS1115_GetAverageVoltage(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{

//	    ADS1115_ReadRawData(&ADS1115_InitType);
//        
//      ADS1115_GetVoltage(&ADS1115_InitType);
//			ADS1115_RefreshAllChannel(&ADS1115_InitType);

//	return ADS1115_RawDataToVoltage(sum/num);
}

/**
 * @brief 刷新ADS1115全部通道的采样数据
 * 		由于ADS1115通道切换后需要等待较长时间数据才能够稳定,
 * 		在进行多路数据采集的时候,切换通道后延时阻塞等待切换完成会占用过多的系统时间,
 * 		因此需要在一个定时器中轮询采集ADS1115数据,每次采集完成后,切换到下一个通道
 * 		大幅度提高了系统工作的效率。
 *
 * 		调用此函数可以刷新全局变量ADS1115_RawData[4]的值。
 *
 * 		应当在一个定时器更新中断服务函数中周期性的调用此函数,更新周期最好小于200Hz
 */
void ADS1115_RefreshAllChannel(ADS1115_InitTypeDefine *ADS1115_InitStruct)
{


	//通道切换时可能有不确定的数据读出,因此需要将前1~2次读出的数据舍弃
	ADS1115_ReadRawData(ADS1115_InitStruct);
	ADS1115_ReadRawData(ADS1115_InitStruct);
	ADS1115_ReadRawData(ADS1115_InitStruct);
	//ADS1115总共4个通道
	ADS1115_InitStruct->CHANNEL++;


	
	

	
	if(ADS1115_InitStruct->CHANNEL > ADS1115_MAX_CHANNEL-1)
		ADS1115_InitStruct->CHANNEL = ADS1115_CHANNEL0;

	//结束采样后切换至下一通道
	ADS1115_ScanChannel(ADS1115_InitStruct);
}

main.c

ADS1115_UserConfig_SingleConver(&ADS1115_ADDR_GND,ADS1115_ADDRESS_GND);//ADDR连接GND 的ADS1115 单次转换模式
	ADS1115_UserConfig_SingleConver(&ADS1115_ADDR_VDD,ADS1115_ADDRESS_VDD);//ADDR连接VDD的ADS1115 单次转换模式

    for(;;)
    {


      ADS1115_GetVoltage(&ADS1115_ADDR_GND);
			ADS1115_RefreshAllChannel(&ADS1115_ADDR_GND);
			printf("ADS1115 GND CH %d vol = %.3f  \n\n",ADS1115_ADDR_GND.CHANNEL,ADS1115_ADDR_GND.ADS1115_Vol[ADS1115_ADDR_GND.CHANNEL]);
			
			
      ADS1115_GetVoltage(&ADS1115_ADDR_VDD);
			ADS1115_RefreshAllChannel(&ADS1115_ADDR_VDD);
			printf("ADS1115 VDD CH %d vol = %.3f  \n\n",ADS1115_ADDR_VDD.CHANNEL,ADS1115_ADDR_VDD.ADS1115_Vol[ADS1115_ADDR_VDD.CHANNEL]);
        osDelay(100);
    }
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