ms5611大气压强传感器的IIC驱动源码 -

#include "main.h"
/*变量声明----------------------------------------------------------------*/
uint16_t Cal_C[7]; //用于存放PROM中的6组数据
uint32_t D1_Pres,D2_Temp; // 存放数字压力和温度
float Pressure; //温度补偿大气压
double dT;
float Temperature,Temperature2;//实际和参考温度之间的差异,实际温度,中间值
double OFF,SENS; //实际温度抵消,实际温度灵敏度
float Aux,OFF2,SENS2; //温度校验值
uint32_t ex_Pressure; //串口读数转换值
uint8_t exchange_num[8];
/***初始化函数**/
void MS561101BA_Init(void)
{
my_IIC_Init();
MS561101BA_Reset();
delay_ms(100);
MS561101BA_readPROM();
delay_ms(100);
}
/***软复位函数****/
void MS561101BA_Reset(void)
{
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address);
while(IIC_Wait_Ack());
delay_us(100);
IIC_Send_Byte(MS561101BA_RESET);
while(IIC_Wait_Ack());
delay_us(100);
IIC_Stop();
}
//从PROM读取出厂校准数据
void MS561101BA_readPROM(void)
{
u16 data1,data2;
u8 i=0;
for(i=0;i<=6;i++)
{
/***********************************/
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address);//写入从设备地址，并设定为写入模式
while(IIC_Wait_Ack());
delay_us(100);
IIC_Send_Byte(MS561101BA_PROM_BASE_ADDR+i*2);//写入寄存器地址，准备读取数据
while(IIC_Wait_Ack());
delay_us(100);
IIC_Stop();
delay_us(100);
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address+0x01);//写入从设备地址，并设定为读取模式
while(IIC_Wait_Ack());
delay_us(100);
data1=IIC_Read_Byte(1);
data2=IIC_Read_Byte(0);
IIC_Stop();
delay_ms(10);
Cal_C[i]=(data1<<8)|data2;
}
}
/******读取信息函数******/
uint32_t MS561101BA_DO_CONVERSION(u8 command)
{
u32 conversion=0;
u16 conv1,conv2,conv3;
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address);//写入从设备地址，并设定为写入模式
while(IIC_Wait_Ack());
IIC_Send_Byte(command); //写入寄存器地址（指令），准备读取数据
while(IIC_Wait_Ack());
IIC_Stop();
delay_ms(20);
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address);
while(IIC_Wait_Ack());
IIC_Send_Byte(0x00);
while(IIC_Wait_Ack());
IIC_Stop();//I2C ADC read sequence
delay_ms(10);
IIC_Start();
IIC_Send_Byte(MS561101BA_Device_Address+1);
while(IIC_Wait_Ack());
conv1=IIC_Read_Byte(1);
conv2=IIC_Read_Byte(1);
conv3=IIC_Read_Byte(0);
IIC_Stop();
delay_ms(10);
conversion= (conv1<<16) + (conv2<<8) + conv3;
return conversion;
}
//读取数字温度
void MS561101BA_GetTemperature(u8 OSR_Temp)
{
D2_Temp= MS561101BA_DO_CONVERSION(OSR_Temp);
delay_ms(10);
dT=D2_Temp - ((((unsigned long)Cal_C[5])<<8)*1.0);
Temperature=2000+dT*((u32)Cal_C[6])/8388608.0;//2007等于20.07摄氏度
}
//读取大气压强
void MS561101BA_GetPressure(u8 OSR_Pres)
{
float Aux,OFF2,SENS2; //温度校验值
D1_Pres=MS561101BA_DO_CONVERSION(OSR_Pres);
delay_ms(10);
OFF=(u32)(Cal_C[2]<<16)+((u32)Cal_C[4]*dT)/128.0;
SENS=(u32)(Cal_C[1]<<15)+((u32)Cal_C[3]*dT)/256.0;
//温度补偿
if(Temperature < 2000)// second order temperature compensation when under 20 degrees C
{
Temperature2 = (dT*dT) / 0x80000000;//(0x80000000是2的31次方)
Aux = (Temperature-2000)*(Temperature-2000);
OFF2 = 2.5*Aux;
SENS2 = 1.25*Aux;
if(Temperature < -1500)
{
Aux = (Temperature+1500)*(Temperature+1500);
OFF2 = OFF2 + 7*Aux;
SENS2 = SENS + 5.5*Aux;
}
}else //(Temperature > 2000)
{
Temperature2 = 0;
OFF2 = 0;
SENS2 = 0;
}
Temperature = Temperature - Temperature2;
OFF = OFF - OFF2;
SENS = SENS - SENS2;
Pressure=(D1_Pres*SENS/2097152.0-OFF)/32768.0;//100009= 1000.09 mbar
//一个标准大气压的压强是1.013x10^3mbar
}
void MS561101BA_data_transfer(void)
{
long temp_transfer=0;
long press_transfer=0;
unsigned char temp_exchange_number[]={'0'};
unsigned char press_exchange_number[]={'0'};
u8 temp_datalen=0,press_datalen=0,i=0;
if(Temperature<0)
{
temp_transfer=(long)(-Temperature);//（注意此单位是100*摄氏度，需将温度转换成摄氏度为单位）
temp_exchange_number[0]='-';
}
else
{
temp_transfer=(long)Temperature;//（注意此单位是100*摄氏度，需将温度转换成摄氏度为单位）
temp_exchange_number[0]='\0';
}
if(temp_transfer>=0&&temp_transfer<=9999)
{
temp_datalen=6;
temp_exchange_number[1]=((u16)(temp_transfer/1000.0f)+0x30);//十位
temp_transfer=temp_transfer%1000;
temp_exchange_number[2]=((u16)(temp_transfer/100.0f)+0x30);//个位
temp_transfer=temp_transfer%100;
temp_exchange_number[3]='.';
temp_exchange_number[4]=((u16)(temp_transfer/10.0f)+0x30);
temp_transfer=temp_transfer%10;
temp_exchange_number[5]=((u16)(temp_transfer)+0x30);
printf("当前温度是：");
for(i=0;i<6;i++)
{
printf("%c",temp_exchange_number[i]);
}
printf("°C \r \n");
}
if(temp_transfer>=10000)
{//温度大于100度
temp_datalen=7;
temp_exchange_number[1]=((u16)(temp_transfer/10000.0f)+0x30);//百位
temp_transfer=temp_transfer%10000;
temp_exchange_number[2]=((u16)(temp_transfer/1000.0f)+0x30);//十位
temp_transfer=temp_transfer%1000;
temp_exchange_number[3]=((u16)(temp_transfer/100.0f)+0x30);//个位
temp_transfer=temp_transfer%100;
temp_exchange_number[4]='.';
temp_exchange_number[5]=((u16)(temp_transfer/10.0f)+0x30);
temp_transfer=temp_transfer%10;
temp_exchange_number[6]=((u16)(temp_transfer)+0x30);
printf("当前温度是：");
for(i=0;i<temp_datalen;i++)
{
printf("%c",temp_exchange_number[i]);
}
printf("°C \r \n");
}
/*********发送气压大小***********/
if(Pressure<0)
{
press_transfer=(long)(-Pressure);//（注意此单位是100*摄氏度，需将温度转换成摄氏度为单位）
press_exchange_number[0]='-';
}
else
{
press_transfer=(long)Pressure;//（注意此单位是100*摄氏度，需将温度转换成摄氏度为单位）
press_exchange_number[0]='\0';
}
if(press_transfer>=0&&press_transfer<=99999)
{
press_datalen=7;
press_exchange_number[1]=((u16)(press_transfer/10000.0f)+0x30);//百位
press_transfer=press_transfer%10000;
press_exchange_number[2]=((u16)(press_transfer/1000.0f)+0x30);//十位
press_transfer=temp_transfer%1000;
press_exchange_number[3]=((u16)(press_transfer/100.0f)+0x30);//个位
press_transfer=temp_transfer%100;
press_exchange_number[4]='.';
press_exchange_number[5]=((u16)(press_transfer/10.0f)+0x30);
press_transfer=temp_transfer%10;
press_exchange_number[6]=((u16)(press_transfer)+0x30);
printf("当前气压是：");
for(i=0;i<press_datalen;i++)
{
printf("%c",press_exchange_number[i]);
}
printf("mbar \r \n");
}
if(press_transfer>=100000)
{
press_datalen=8;
press_exchange_number[1]=((u16)(press_transfer/100000.0f)+0x30);//千位
press_transfer=press_transfer%100000;
press_exchange_number[2]=((u16)(press_transfer/10000.0f)+0x30);//百位
press_transfer=press_transfer%10000;
press_exchange_number[3]=((u16)(press_transfer/1000.0f)+0x30);//十位
press_transfer=press_transfer%1000;
press_exchange_number[4]=((u16)(press_transfer/100.0f)+0x30);//个位
press_transfer=press_transfer%100;
press_exchange_number[5]='.';
press_exchange_number[6]=((u16)(press_transfer/10.0f)+0x30);
press_transfer=press_transfer%10;
press_exchange_number[7]=((u16)(press_transfer)+0x30);
printf("当前气压是：");
for(i=0;i<press_datalen;i++)
{
printf("%c",press_exchange_number[i]);
}
printf("mbar \r \n");
}
}
/***** brief 获取ms5611的数据并写出onenet平台要求的Http协议格式 *****/
void get_ms5611_data(void)
{
char data[25]={0};
MS561101BA_GetTemperature(MS561101BA_Temp_D2_OSR_4096);
MS561101BA_GetPressure(MS561101BA_Press_D1_OSR_4096);
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