请问这段基于msp430的hdc1080传感器的驱动程序如何读取温湿度数值？我需要将温湿度用oied屏显示出来 - 平头弟

请问这段基于msp430的hdc1080传感器的驱动程序如何读取温湿度数值？我需要将温湿度用oied屏显示出来

2019-07-15 07:20发布

站内问答 / 51单片机

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#define HDC1080_I2C_ADDR 0x80
#define Temperature 0x00
#define Humidity 0x01
#define Configuration 0x02
#define Manufacturer_ID 0xFE
#define Device_ID 0xFF

#define Manufacturer_ID_value 0x5449
#define Device_ID_value 0x1050
#define Configuration_1 0x1000
#define Configuration_2 0x3000

#define I2C_SCL_PORT       BIT3
#define I2C_SDA_PORT       BIT1

#define I2C_SDA_AS_IN( ) P3DIR &=~(BIT1)
#define I2C_SDA_AS_OUT( ) P3DIR|= BIT1
typedef unsigned char uint8_t;
extern int temp_value;
extern int humi_value;
#include <stdio.h>
#define PLLCON_SETTING    CLK_PLLCON_50MHz_HXT
#define PLL_CLOCK          50000000
int main1(void);

#include "hhh.h"
#include "msp430x14x.h"
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables                                                                                     */
/*---------------------------------------------------------------------------------------------------------*/
void DelayTime10us(unsigned char n)
{
unsigned char i;
   while(n--)
      for(i=0;i<10;i++);
}

void MyApp_InitI2c( void )
{
/* Configure P1.2 and P4.1 to default Quasi-bidirectional mode */
P3DIR|= BIT1;
P3DIR|= BIT3;

P3OUT|= BIT3;
P3OUT|= BIT1;

}

void MyApp_I2cStart( void )
{
I2C_SDA_AS_OUT( );
P3OUT|= BIT1 ;
DelayTime10us(2);

P3OUT|= BIT3 ;
DelayTime10us(2);

P3OUT &=~(BIT1);
}

void MyApp_I2cReStart( void )
{
P3OUT &=~(BIT3);
DelayTime10us(2);

I2C_SDA_AS_OUT( );
P3OUT|= BIT1;
DelayTime10us(2);

P3OUT|= BIT3;
DelayTime10us(2);

P3OUT &=~(BIT1);
}

void MyApp_I2cStop( void )
{
P3OUT &=~(BIT3);
DelayTime10us(2);

I2C_SDA_AS_OUT( );
P3OUT &=~(BIT1);
DelayTime10us(2);

P3OUT|= BIT3 ;
DelayTime10us(2);

P3OUT|= BIT1;
}

void MyApp_I2cSendAck( void )
{
P3OUT &=~(BIT3);
DelayTime10us(2);

I2C_SDA_AS_OUT( );
P3OUT &=~(BIT1);
DelayTime10us(2);

P3OUT|= BIT3 ;
DelayTime10us(2);
}

void MyApp_I2cSendNAck( void )
{
P3OUT &=~(BIT3);
DelayTime10us(2);

I2C_SDA_AS_OUT( );
P3OUT|= BIT1;
DelayTime10us(2);

P3OUT|= BIT3;
DelayTime10us(2);
DelayTime10us(2);
}

void MyApp_I2cSendByte( unsigned char bData )
{
uint8_t i;
uint8_t BitMask = 0x80;

// 20Us/Bit
for (i=0; i<8; i++)
{
      DelayTime10us(2);

      P3OUT &=~(BIT3);
      DelayTime10us(2);
      I2C_SDA_AS_OUT( );

      if (bData & BitMask)
      {
         P3OUT|= BIT1 ;
      }
      else
      {
         P3OUT &=~(BIT1) ;
      }
      BitMask >>= 1;
      DelayTime10us(2);

      P3OUT|= BIT3  ;
      DelayTime10us(2);
}
}

unsigned char MyApp_I2cReceiveByte( void )
{
uint8_t i;
uint8_t ByteData = 0;
uint8_t BitMask = 0x80;

P3OUT &=~(BIT3);
I2C_SDA_AS_IN( );

// 20Us/Bit
for (i=0; i<8; i++)
{
      P3OUT &=~(BIT3);
   DelayTime10us(2);
   DelayTime10us(2);

   P3OUT|= BIT3;
      DelayTime10us(250);

      if (I2C_SDA_PORT)
      {
         ByteData |= BitMask;
      }
   DelayTime10us(2);

      BitMask >>= 1;
}

return ByteData;
}

unsigned char MyApp_I2cCheckAck( void )
{
P3OUT &=~(BIT3);
I2C_SDA_AS_IN( );
DelayTime10us(2);
DelayTime10us(2);

P3OUT|= BIT3 ;
DelayTime10us(2);

      if(I2C_SDA_PORT!=0)
            return 1;
      else
            return 0;
}

void I2C_Write_HDC1080(unsigned char dev_addr, unsigned char  register_addr,  unsigned  int  value)
{
unsigned char i;
unsigned char datax[2];

      datax[0] = (uint8_t)((value& 0xFF00) >> 8);
      datax[1] = (uint8_t)(value & 0x00FF);

for(i=20;i>0;i--)
      {
      MyApp_I2cStart( );

      MyApp_I2cSendByte( dev_addr);       // HDC1080 Addr + W
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cSendByte( register_addr);
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cSendByte( datax[0] );
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cSendByte( datax[1] );
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cStop( );
      return;
      }

}

void I2C_Read_HDC1080(unsigned char dev_addr, unsigned char  register_addr,  unsigned  char  *datax)
{
unsigned char i;

datax[0]=0;
datax[1]=0;

for(i=20;i>0;i--)
      {
      MyApp_I2cStart( );

      MyApp_I2cSendByte( dev_addr);       // HDC1080 Addr + W
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cSendByte( register_addr);
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      MyApp_I2cReStart( );

      MyApp_I2cSendByte( dev_addr|0x01); // HDC1080 Addr + R
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            continue;
            }

      datax[0] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendAck( );

      datax[1] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendNAck( );

      MyApp_I2cStop( );
      return;
      }

}

void I2C_Read_HDC1080_TempHumidity(unsigned char dev_addr, unsigned char  register_addr,  unsigned char  *datax)
{

datax[0]=0;
datax[1]=0;
datax[2]=0;
datax[3]=0;

      MyApp_I2cStart( );

      MyApp_I2cSendByte( dev_addr);       // HDC1080 Addr + W
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            return;
            }

      MyApp_I2cSendByte( register_addr);
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            return;
            }

      DelayTime10us(2);
      DelayTime10us(2);
      DelayTime10us(2);
      DelayTime10us(2);// It's  better to  be  set  over 30ms.

      MyApp_I2cReStart( );

      MyApp_I2cSendByte( dev_addr|0x01); // HDC1080 Addr + R
      if(MyApp_I2cCheckAck( ))
            {
            MyApp_I2cStop();
            return;
            }

      datax[0] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendAck( );

      datax[1] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendAck( );

      datax[2] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendAck( );

      datax[3] = MyApp_I2cReceiveByte( );
      MyApp_I2cSendNAck( );

      MyApp_I2cStop( );

}

void Convert_HDC1080_TempHumidity(unsigned char *datax)
{
//100 times of the actural value
unsigned long  temp,humidity;
temp=(unsigned long)(datax[0]<<8);
temp+=datax[1];
temp=(temp*16500)>>16;
temp-=4000;

humidity=(unsigned long)(datax[2]<<8);
humidity+=datax[3];
humidity=(humidity*100)>>16;

}

//HDC1080_Init  subroutine
//return : 0 - HDC1080 initiate  unstable or  you should check with your  i2c subroutine.       1-HDC1080 initiate ok.
unsigned char HDC1080_Init(void)
{
unsigned int data1,data2;
unsigned char datax[2];
I2C_Read_HDC1080(HDC1080_I2C_ADDR,Manufacturer_ID,datax);
data1=(unsigned int)(datax[0]<<8);
data1+=datax[1];
printf("HDC1080 Manufacturer_ID = 0x%x ", data1);
I2C_Read_HDC1080(HDC1080_I2C_ADDR,Device_ID,datax);
data2=(unsigned int)(datax[0]<<8);
data2+=datax[1];
printf("HDC1080 Device_ID = 0x%x ", data2);
if(data1!=Manufacturer_ID_value||data2!=Device_ID_value)
      {
      printf("I2C_Read_HDC1080 Manufacturer_ID or Device_ID_value error ");
      return 0;
      }

data1=Configuration_1;
I2C_Write_HDC1080(HDC1080_I2C_ADDR, Configuration, data1);
//wait  at least  20ms  to readout  temp&humidity  value

printf("I2C_Write_HDC1080 register 0x02 = 0x%x ", data1);

I2C_Read_HDC1080(HDC1080_I2C_ADDR,Configuration,datax);
data1=(unsigned int)(datax[0]<<8);
data1+=datax[1];

printf("I2C_Read_HDC1080 register 0x02 = 0x%x ", data1);
//SysTickDelay_ms(2000);
return 1;
}

/*---------------------------------------------------------------------------------------------------------*/
/*  Main Function                                                                                        */
/*---------------------------------------------------------------------------------------------------------*/
int main1(void)
{
unsigned char datax[4];
   /* Init System, peripheral clock and multi-function I/O */
printf("HDC1080 Test Ok ");
printf("I2C0_SDA(P3.1), I2C0_SCL(P3.3)  -  I2C Master ");

/* Init I2C0 */
      MyApp_InitI2c();
      HDC1080_Init();

      printf("main while(1) ");
while(1)
            {
            //I2C_Write_HDC1080(HDC1080_I2C_ADDR, Configuration, 0x1000);
            I2C_Read_HDC1080_TempHumidity(HDC1080_I2C_ADDR,Temperature,datax);
            Convert_HDC1080_TempHumidity(datax);
            DelayTime10us(2);
            DelayTime10us(2);
            DelayTime10us(2);
            DelayTime10us(2);// this  delay can  be cancelled.
            }
}

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3条回答

1楼-- · 2019-07-15 17:02

没用过这个传感器，也没用过430，电路上供电电压是否正确，IIC的线路连接引脚如果设置成开路输出的话，外部有没有接上拉电阻，
看资料，温度计算应该是
temp=(temp*165)>>16;
temp-=40;
另外在你程序初始化部分有读传感器的信息，也可以跟资料对比这些信息，看与传感器通讯是否正确

2楼-- · 2019-07-15 22:27

没用过这个传感器，读取传感器的ID信息等看对传感器的读写时序是否正确，可以定义一个变量，对这个变量不断的加一减一，并显示这个变量，可以检测显示部分是否正确

3楼-- · 2019-07-16 01:27

除了时间还有数据的次序，数据里数据位的次序等等，如果能正确读出传感器的ID，那应该读取传感器就没什么问题，就在于数据处理和显示部分，或者就是传感器坏了

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