[参考译文] TMP117：温度检测问题

您好、Khojem、

感谢您在传感论坛上发帖。

您可以分享原理图和布局图吗？ 这将帮助我们解决任何潜在问题。

此致、
Nicole

您好、Nicole、

当然、请查找随附的传感器原理图和柔性 PCB 照片、以供您参考

此致、

Khojem

您好、Khojem、

我知道 Nicole 正在与您合作解决这个问题、但我将提供我的2分钱。 您的电路看起来很好。 让我们看看 Nicole 还能提供什么。  

过去我也遇到过类似的问题。 我必须在初始化时将 TMP117变量设置为"0"、以清除损坏的数据。

尝试从 TMP117读回原始数据、然后查看数据是恒定的、还是在您将手指放在 TMP117上时发生变化。  这将验证您是否实际正在读取 TMP117。 如果数据看起来是恒定的、那么您可能不会从 TMP117读取数据。

最后、下面是我用于将数据转换为温度的代码的副本。 但愿这对您有所帮助。

//  ======== TMP117_toIntCelsius ========
//  Convert raw temperature register value to degrees Celsius rounded to the
//  nearest integer
//
 int32_t TMP117_toIntCelsius(int32_t x)
 {
     /* Optional: Add bias to round before the final truncation */
     x += (x >= 0) ? (1 << 6) : -(1 << 6);

     /* Convert value to whole number */
     x /= 1 << 7; /* use division so small negative values round to 0 */

     return x;
 }

 //
 //  ======== TMP117_toMilliCelsius ========
 //  Convert raw temperature register value to milli-degrees Celsius
 //
 int32_t TMP117_toMilliCelsius(int32_t x)
 {
     /* Scale to milli-degrees, convert value to a whole number */
     return ((1000 * x) >> 7);
 }

 //
 //  ======== TMP117_toFloatCelsius ========
 //  Convert raw temperature register value to degrees Celsius
 //
 float TMP117_toFloatCelsius(int32_t x)
 {
     /* Convert value to a float */
     return ((float)x * 0.0078125f);
 }
 
 
 
 
 // read 2 bytes of temperature data 0x0000 and store in data[0] and data[1]
 tmp = (((int32_t)(int8_t)data[0]) << 8) | data[1];
 
 // convert TMP117 data to temperature in C 
 tmp1170Temp = tmp;
 tmp1170TempAsIntCelsius = TMP117_toIntCelsius(tmp1170Temp);
 tmp1170TempAsMilliCelsius = TMP117_toMilliCelsius(tmp1170Temp);
 TMP117_I2C_2 = TMP117_toFloatCelsius(tmp1170Temp) + TMP117_OFFSET_2;

Josh、您好！

当前控制器和 TMP117在同一电压电平上=+3.3V。 我们对 PCB 进行了返工。

大家好、Gordon、  

感谢您的支持、但我们无法获得准确的数据、并且我们将不断获得相同的价值。

此致、

Khojem

您好、Khojem、

您能否提供错误温度读取的示波器捕获以及从 TMP117读取的代码？

//Library for TMP117-High-Precision-Digital-Temperature-Sensor
//I have written it using HAL API.
//I have not added exception handling in this library because it makes code bulky.
//you can simply use exception handling in your main function.
//Hope it helps!

#include "TMP117.h"

uint8_t TMP117_DeviceID = TMP117_GND;

void TMP117_Init(I2C_HandleTypeDef *i2c) //this function will initialize the sensor using custom parameters
{
      TMP117_set_Config(i2c,0x02,0x20);
      TMP117_set_Temp_Offset(i2c,0x00,0x00);
      TMP117_set_LowLimit(i2c,0x28,0x16);           //Set 22 Celcius
      TMP117_set_HighLimit(i2c,0x76,0x80);          //Set 60 Celcius
}

void TMP117_set_Averaging(I2C_HandleTypeDef *i2c,TMP117_AVE ave) //set the high and low limit register for alert
{
	 uint16_t reg_value = TMP117_get_Config (i2c);
	 reg_value &= ~((1UL << 6) | (1UL << 5) );      	 	//clear bits
     reg_value = reg_value |( ( ave & 0x03 ) << 5);          //set bits
     uint8_t first = (reg_value&0x0F); 
	 uint8_t second =reg_value>>8;
	 TMP117_set_Config(i2c,first,second);
}

void TMP117_set_Alert_Temp(I2C_HandleTypeDef *i2c,uint8_t Lowfirst,uint8_t LowSecond,uint8_t Highfirst,uint8_t HighSecond)
{
	  uint8_t bufLow[3],bufHigh[3];
      bufLow[0]=TMP117_TempLowLimit;
      bufLow[1]=Lowfirst;     
      bufLow[2]=LowSecond;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,bufLow,2,HAL_MAX_DELAY);
      HAL_Delay(1);
	  
      bufHigh[0]=TMP117_TempHighLimit;
      bufHigh[1]=Highfirst;     
      bufHigh[2]=HighSecond;   
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,bufHigh,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

float TMP117_get_Temp(I2C_HandleTypeDef *i2c) //This function will return the temp in float.
{
      uint8_t buf[4];
      buf[0]=TMP117_TempReg;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,4,HAL_MAX_DELAY);
      float Temp= ((buf[0]<<8)|buf[1]) * 0.0078125;
      return Temp;
}

uint16_t TMP117_get_Config(I2C_HandleTypeDef *i2c) //this function will return the configuration register value
{
      uint8_t buf[3];
      buf[0]=TMP117_ConfigReg;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
	  uint16_t Config= ((buf[0]<<8)|buf[1]);
      return Config;
}

void TMP117_set_Config(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set the configuration register
{
      uint8_t buf[3];
      buf[0]=TMP117_ConfigReg;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

void TMP117_set_HighLimit(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set the the high limit for alert
{
      uint8_t buf[3];
      buf[0]=TMP117_TempHighLimit;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

uint16_t TMP117_get_HighLimit(I2C_HandleTypeDef *i2c) //this function will return the highlimit register value
{
      uint8_t buf[3];
      buf[0]=TMP117_TempHighLimit;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t HighLimit= ((buf[0]<<8)|buf[1]);
      return HighLimit;    
}

void TMP117_set_LowLimit(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second)//this function will set the low limit for alert
{
      uint8_t buf[3];
      buf[0]=TMP117_TempLowLimit;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);    
}

uint16_t TMP117_get_LowLimit(I2C_HandleTypeDef *i2c) //this function will return the lowlimit register value
{
      uint8_t buf[3];
      buf[0]=TMP117_TempLowLimit;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      return ((buf[0]<<8)|buf[1]);    
}

uint16_t TMP117_get_EEPROM_Unlock(I2C_HandleTypeDef *i2c) //this will return the EEPROM unlock register value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM_Unlock;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t Unlock= ((buf[0]<<8)|buf[1]);
      return Unlock;     
}

void TMP117_set_EEPROM_Unlock(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //by this function we will set the EEPROM register value for read and write
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM_Unlock;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

void TMP117_set_EEPROM1(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set EEPROM1 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM1;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1); 
}

uint16_t TMP117_get_EEPROM1(I2C_HandleTypeDef *i2c) //by this function we wiil get EEPROM1 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM1;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t EEPROM1= ((buf[0]<<8)|buf[1]);
      return EEPROM1;     
}

void TMP117_set_EEPROM2(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set EEPROM2 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM2;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);     
}

uint16_t TMP117_get_EEPROM2(I2C_HandleTypeDef *i2c) //by this function we wiil get EEPROM2 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM2;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t EEPROM2= ((buf[0]<<8)|buf[1]);
      return EEPROM2;
}

void TMP117_set_EEPROM3(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set EEPROM3 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM3;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

uint16_t TMP117_get_EEPROM3(I2C_HandleTypeDef *i2c) //by this function we wiil get EEPROM3 value
{
      uint8_t buf[3];
      buf[0]=TMP117_EEPROM3;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t EEPROM3= ((buf[0]<<8)|buf[1]);
      return EEPROM3;     
}

void TMP117_set_Temp_Offset(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second) //this function will set the temperature offset value
{
      uint8_t buf[3];
      buf[0]=TMP117_Temp_Offset;
      buf[1]=first;     
      buf[2]=second;    
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      HAL_Delay(1);
}

uint16_t TMP117_get_Temp_Offset(I2C_HandleTypeDef *i2c) //by this function we will get the temprature offset value
{
      uint8_t buf[3];
      buf[0]=TMP117_Temp_Offset;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
			uint16_t TempOffset= ((buf[0]<<8)|buf[1]);
      return TempOffset;
}
uint16_t TMP117_get_ID_Reg(I2C_HandleTypeDef *i2c) //This function will return the ID register
{
      uint8_t buf[3];
      buf[0]=TMP117_ID_Reg;
      HAL_I2C_Master_Transmit(i2c,TMP117_DeviceID,buf,0,HAL_MAX_DELAY);
      HAL_Delay(1);
      HAL_I2C_Master_Receive(i2c,TMP117_DeviceID,buf,2,HAL_MAX_DELAY);
      uint16_t ID= ((buf[0]<<8)|buf[1]);
      return ID;
}

//Library for TMP117-High-Precision-Digital-Temperature-Sensor
//I have written it using HAL Api.
//I have not added exception handling in this library because it makes code bulky.
//you can simply use exception handling in your main function.
//Hope it helps!


#ifndef      _TMP117_H_
#define      _TMP117_H_

#ifndef     __STM32F4xx_HAL_I2C_H
#define     __STM32F4xx_HAL_I2C_H
#endif	

#include "main.h"

#define     TMP117_GND 0x48<<1    //	GND
#define     TMP117_VCC 0x49<<1    //	VCC
#define     TMP117_SDA 0x4A<<1    //	SDA
#define     TMP117_SCL 0x4B<<1    //	SCL

/*------------Pointer Registers-----------------------*/

#define     TMP117_TempReg    			 0x00
#define     TMP117_ConfigReg  			 0x01
#define     TMP117_TempHighLimit  	 0x02
#define     TMP117_TempLowLimit    	 0x03
#define     TMP117_EEPROM_Unlock     0x04
#define     TMP117_EEPROM1           0x05
#define     TMP117_EEPROM2        	 0x06
#define     TMP117_Temp_Offset   	   0x07
#define     TMP117_EEPROM3           0x08
#define     TMP117_ID_Reg		         0x0F


typedef enum _TMP117_AVE{NOAVE = 0, AVE8, AVE32, AVE64}TMP117_AVE;    //Averaging mode No Average, Average 8,32,64

void TMP117_set_Averaging(I2C_HandleTypeDef *i2c,TMP117_AVE ave);    //set averaging

void TMP117_set_Alert_Temp(I2C_HandleTypeDef *i2c,uint8_t Lowfirst,uint8_t LowSecond,uint8_t Highfirst,uint8_t HighSecond); //set the high and low limit register for alert

float TMP117_get_Temp(I2C_HandleTypeDef *i2c); //Return the temperature in float.

uint16_t TMP117_get_Config(I2C_HandleTypeDef *i2c); //Return TMP117 configuration register value

void TMP117_set_Config(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); // Set the configuration Reg for features.

void TMP117_set_HighLimit(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set high limit for alert

uint16_t TMP117_get_HighLimit(I2C_HandleTypeDef *i2c); //Get the high limit register value

void TMP117_set_LowLimit(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set low limit for alert

uint16_t TMP117_get_LowLimit(I2C_HandleTypeDef *i2c); //Get the low limit register value

uint16_t TMP117_get_EEPROM_Unlock(I2C_HandleTypeDef *i2c); //Get EEPROM Unlock Register Value

void TMP117_set_EEPROM_Unlock(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set EEPROM Unlock Register value

void TMP117_set_EEPROM1(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set EEPROM1

uint16_t TMP117_get_EEPROM1(I2C_HandleTypeDef *i2c); //Get the Value from EEPROM1

void TMP117_set_EEPROM2(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set EEPROM2

uint16_t TMP117_get_EEPROM2(I2C_HandleTypeDef *i2c); //Get the Value from EEPROM2

void TMP117_set_EEPROM3(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set EEPROM3

uint16_t TMP117_get_EEPROM3(I2C_HandleTypeDef *i2c); //Get the Value from EEPROM3

void TMP117_set_Temp_Offset(I2C_HandleTypeDef *i2c,uint8_t first,uint8_t second); //Set temperature offset value

uint16_t TMP117_get_Temp_Offset(I2C_HandleTypeDef *i2c); //Get temperature offset value

uint16_t TMP117_get_ID_Reg(I2C_HandleTypeDef *i2c); //Get ID Register

void TMP117_Init(I2C_HandleTypeDef *i2c); //Initialization by giving the parameters

#endif

您好、Khojem、

您能否布置一个示波器捕获的错误温度读数？

此致、
Nicole