INA226模块驱动代码-STM32F103

2024-04-27 07:14:02
开发
11

模块：

平台:STM32F103C8T6

标准库

软件模拟IIC

C文件：

#include "ina226.h"

//delay
static void delay_nns(uint16_t D)  //30纳秒ns  根据手册要用到IIC的HS高速模式
{
    while(--D);
}

void delay_nms(uint16_t ms)  //毫秒
{
    uint16_t i;
    uint32_t M = 0;//720W
    for(i = 0;i < ms; i++)
    for(M=12000;M > 0;M--);
}

void delay_nus(uint16_t us)//微秒
{
    uint16_t i;
    uint16_t M = 0;//720W
    for(i = 0;i < us; i++)
    for(M=72;M > 0;M--);
}

//IIC

/****************IIC***************************/
void INA226_IIC_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(INA_SCL_RCC|INA_SDA_RCC, ENABLE);	/* 打开GPIO时钟 */
    
    GPIO_InitStructure.GPIO_Pin=INA_SCL_PIN;
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;  
    GPIO_Init(INA_SCL_GPIO_PORT, &GPIO_InitStructure);
	
	  GPIO_InitStructure.GPIO_Pin=INA_SDA_PIN;
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;  
    GPIO_Init(INA_SDA_GPIO_PORT, &GPIO_InitStructure);
    
    INA_SCL=1;
    INA_SDA=1;  
    delay_nms(5);
}
    
void INA226_IIC_Start(void)
{
    INA_SCL=1;
    INA_SDA=1;
    delay_nns(5);
     INA_SDA=0;//START:when CLK is high,DATA change form high to low 
    delay_nns(5);
    INA_SCL=0;;//钳住I2C总线，准备发送或接收数据 
    delay_nns(5);
}    

void INA226_IIC_Stop(void)
{
    INA_SDA=0;//STOP:when CLK is high DATA change form low to high
     delay_nns(5);
    INA_SCL=1; 
     delay_nns(5);
    INA_SDA=1;//发送I2C总线结束信号
    delay_nns(5);                                   
}

void INA226_IIC_Ack(void)
{
    INA_SDA=0;
    delay_nns(5);
    INA_SCL=1;
    delay_nns(5);
    INA_SCL=0;;
    delay_nns(5);
    INA_SDA=1;
}

void INA226_IIC_NAck(void)
{
    INA_SDA=1;
    delay_nns(5);
    INA_SCL=1;
delay_nns(5);
    INA_SCL=0;;
    delay_nns(5);
    INA_SDA=0;
}        

uint8_t INA226_IIC_Wait_Ack(void)
{
    uint8_t ucErrTime=0;
   
    INA_SDA=1;
    delay_nns(5);       
    INA_SCL=1;
    delay_nns(5);          
    
    while(READ_SDA)
    {
        ucErrTime++;
        if(ucErrTime>250)
        {
            INA226_IIC_Stop();
            return 1;
        }
    }
    INA_SCL=0;//时钟输出0        
    return 0;  
}

void INA226_IIC_Send_Byte(uint8_t txd)
{  int i;                           
   INA_SCL=0;;//拉低时钟开始数据传输
   for( i = 0;i < 8;i++)
    {              
        if(txd&0x80)
                    INA_SDA=1;
                else
                    INA_SDA=0;                
        txd<<=1;       
                
        INA_SCL=1;
        delay_nns(5);
        INA_SCL=0;
        delay_nns(5);
    }            
} 

uint8_t INA226_IIC_Read_Byte(unsigned char ack)
{
      uint8_t TData=0,i;
    for(i=0;i<8;i++)
    {
        INA_SCL=1;
        delay_nns(5);
        TData=TData<<1;
            if(READ_SDA)
        {
            TData|=0x01;
        }
        INA_SCL=0;;
        delay_nns(5);
    }
        if(!ack)
            INA226_IIC_NAck();
        else
            INA226_IIC_Ack();
    return TData;
}

/**********************IIC_END*************************/

void INA226_Init(void)
{
    INA226_IIC_Init();
    delay_nms(10);

    INA226_SendData(WRITE_ADDR,0x00,0x4727);//初始化结果采用64次平均值，全功能，连续模式
    INA226_SendData(WRITE_ADDR,0x05,0x200);//（当单位为mA时：0.002R=0xA00;0.01R=0x200）;(上限8A)
}

void INA226_SendData(uint8_t addr,uint8_t reg,uint16_t data)
{
    uint8_t temp = 0;
    INA226_IIC_Start();
    INA226_IIC_Send_Byte(addr);
    INA226_IIC_Wait_Ack();
 
    INA226_IIC_Send_Byte(reg);
    INA226_IIC_Wait_Ack();
    
    temp = (uint8_t)(data>>8);
    INA226_IIC_Send_Byte(temp);
    INA226_IIC_Wait_Ack();
 
    temp = (uint8_t)(data&0x00FF);
    INA226_IIC_Send_Byte(temp);
    INA226_IIC_Wait_Ack();
    
    INA226_IIC_Stop();
}


void INA226_SetRegPointer(uint8_t addr,uint8_t reg)
{
    INA226_IIC_Start();
 
    INA226_IIC_Send_Byte(addr);
    INA226_IIC_Wait_Ack();
 
    INA226_IIC_Send_Byte(reg);
    INA226_IIC_Wait_Ack();
 
    INA226_IIC_Stop();
}


uint16_t INA226_ReadData(uint8_t addr)
{
    uint16_t temp=0;
    INA226_IIC_Start();
 
    INA226_IIC_Send_Byte(addr+1);
    INA226_IIC_Wait_Ack();
    
    temp = INA226_IIC_Read_Byte(1);
    temp<<=8;    
    temp |= INA226_IIC_Read_Byte(0);
    
    INA226_IIC_Stop();
    return temp;
}


uint16_t INA226_GetShuntCurrent(uint8_t addr)
{
    uint16_t temp=0;    
    INA226_SetRegPointer(addr,Current_Reg);
    temp = INA226_ReadData(addr);
//   if(temp&0x8000)    temp = ~(temp - 1);//保留符号留给读数函数处理
        return temp;
}
 
//获取 id
uint16_t  INA226_Get_ID(uint8_t addr)
{
    uint16_t temp=0;
    INA226_SetRegPointer(addr,ID_Reg);
    temp = INA226_ReadData(addr);
    return (uint16_t)temp;
}
 
//获取校准值
uint16_t INA226_GET_CAL_REG(uint8_t addr)
{    
    uint16_t temp=0;
    INA226_SetRegPointer(addr,Calib_Reg);
    temp = INA226_ReadData(addr);
    return temp;
}
 
//1.25mV/bit
uint16_t INA226_GetVoltage(uint8_t addr)
{
    uint16_t temp=0;
    INA226_SetRegPointer(addr,Bus_V_Reg);
    temp = INA226_ReadData(addr);
    return temp;    
}
 
 
 
//2.5uV/bit
uint16_t INA226_GetShuntVoltage(uint8_t addr)
{
	  uint16_t temp=0;
    INA226_SetRegPointer(addr,Shunt_V_Reg);
    temp = INA226_ReadData(addr);
    if(temp&0x8000)    temp = ~(temp - 1);    
    return temp;
}
 
//2.5mW/bit
uint16_t INA226_Get_Power(uint8_t addr)
{
    uint16_t temp=0;
    INA226_SetRegPointer(addr,Power_Reg);
    temp = INA226_ReadData(addr);
    return temp;
}

H文件

#ifndef INA226_H
#define INA226_H
#include "sys.h"

#define INA_SCL PBout(8)  //SCL引脚
#define INA_SDA PBout(9)  //SDA引脚

#define INA_SCL_GPIO_PORT	GPIOB			/* GPIO端口 */
#define INA_SCL_RCC 	      RCC_APB2Periph_GPIOB		/* GPIO端口时钟 */
#define INA_SCL_PIN		    GPIO_Pin_8			/* 连接到SCL时钟线的GPIO */

#define INA_SDA_GPIO_PORT	GPIOB			/* GPIO端口 */
#define INA_SDA_RCC 	      RCC_APB2Periph_GPIOB		/* GPIO端口时钟 */
#define INA_SDA_PIN		    GPIO_Pin_9			/* 连接到SDA数据线的GPIO */

#define READ_SDA GPIO_ReadInputDataBit(INA_SDA_GPIO_PORT,INA_SDA_PIN)

#define READ_ADDR         0x81	 	//A0=GND，A1=GND // R=1, W=0
#define WRITE_ADDR        0x80		//芯片IIC地址

#define Config_Reg        0x00		//模式配置寄存器
#define Shunt_V_Reg       0x01		//采样电阻压差；取值：2.5uV~81.92mV(0~7FFF)(10mΩ采样电阻下最大电流8A)
#define Bus_V_Reg         0x02		//BUS总线电压：1.25mV~40.96V(0~7FFF)
#define Power_Reg         0x03		//功率；Current_LSB * 25，FSR = 0xFFFF
#define Current_Reg       0x04		//电流；LSB = 0.02mA，FSR = 0x7FFF
#define Calib_Reg         0x05		//（当单位为mA时：采样电阻0.002R=0xA00;0.01R=0x200）；写入Calibration Register的数据需要根据实际电路中的采样电阻阻值以及电流分辨率来设置
#define Mask_En_Reg       0x06		//
#define Alert_Reg         0x07		//
#define Man_ID_Reg        0xFE  	//0x5449
#define ID_Reg            0xFF  	//0x2260


void INA226_Init(void);
void INA226_SendData(uint8_t addr,uint8_t reg,uint16_t data);
uint16_t  INA226_Get_ID(uint8_t addr);
uint16_t INA226_GetShuntVoltage(uint8_t addr);
uint16_t INA226_GetShuntCurrent(uint8_t addr);
uint16_t INA226_GetVoltage(uint8_t addr);
uint16_t INA226_Get_Power(uint8_t addr);
#endif

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INA226模块驱动代码-STM32F103

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