tsensor.c

stm32.rar

* Function Name  : I2C_LM75_ConfReg_Read
* Description    : Read the configuration register from the LM75.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
u8 I2C_LM75_ConfReg_Read(void)
{
  u32 RegValue = 0;

  /*----- Transmission Phase -----*/
  /* Send I2C1 START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }

  /* Send STLM75 slave address for write */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Transmitter);
  
  /* Test on I2C1 EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) /* EV6 */
  {
  }

  /* Send the configuration register data pointer */
  I2C_SendData(I2C1, LM75_CONF_Reg);
  
  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
  {
  }

  /*----- Reception Phase -----*/
  /* Send Re-STRAT condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }
  
  /* Send STLM75 slave address for read */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Receiver);
  
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))  /* EV6 */
  {
  }

  /* Disable I2C1 acknowledgement */
  I2C_AcknowledgeConfig(I2C1, DISABLE);
  
  /* Send I2C1 STOP Condition */
  I2C_GenerateSTOP(I2C1, ENABLE);

  /* Test on EV7 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))  /* EV7 */
  {
  }
  
  /* Store I2C1 received data */
  RegValue = I2C_ReceiveData(I2C1);

  /* Return configuration register value */
  return (RegValue);    
}

/*******************************************************************************
* Function Name  : I2C_LM75_ConfReg_Write
* Description    : Write to the configuration register of the LM75.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_LM75_ConfReg_Write(u8 RegValue)
{
  /*----- Transmission Phase -----*/
  /* Send I2C1 START condition */
  I2C_GenerateSTART(I2C1, ENABLE);

  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }
  
  /* Send STLM75 slave address for write */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Transmitter);
  
  /* Test on I2C1 EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) /* EV6 */
  {
  }

  /* Send the configuration register data pointer */
  I2C_SendData(I2C1, LM75_CONF_Reg);
  
  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
  {
  }

  /* Send I2C1 data */
  I2C_SendData(I2C1, RegValue);
  
  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
  {
  }

  /* Send I2C1 STOP Condition */
  I2C_GenerateSTOP(I2C1, ENABLE);     
}

/*******************************************************************************
* Function Name  : I2C_LM75_ShutDown
* Description    : Enables or disables the LM75.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void I2C_LM75_ShutDown(FunctionalState NewState)
{
  u32 RegValue = 0;

  /*----- Transmission Phase -----*/
  /* Send I2C1 START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }

  /* Send STLM75 slave address for write */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Transmitter);
  
  /* Test on I2C1 EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) /* EV6 */
  {
  }

  /* Send the configuration register data pointer */
  I2C_SendData(I2C1, LM75_CONF_Reg);
  
  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED))  /* EV8 */
  {
  }

  /*----- Reception Phase -----*/
  /* Send Re-STRAT condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }
  
  /* Send STLM75 slave address for read */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Receiver);
  
  /* Test on EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))  /* EV6 */
  {
  }
  
  /* Disable I2C1 acknowledgement */
  I2C_AcknowledgeConfig(I2C1, DISABLE);
  
  /* Send I2C1 STOP Condition */
  I2C_GenerateSTOP(I2C1, ENABLE);

  /* Test on EV7 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))  /* EV7 */
  {
  }
  
  /* Store I2C1 received data */
  RegValue = I2C_ReceiveData(I2C1);

  /*----- Transmission Phase -----*/
  /* Send I2C1 START condition */
  I2C_GenerateSTART(I2C1, ENABLE);
  
  /* Test on I2C1 EV5 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))  /* EV5 */
  {
  }
  
  /* Send STLM75 slave address for write */
  I2C_Send7bitAddress(I2C1, LM75_Addr, I2C_Direction_Transmitter);
  
  /* Test on I2C1 EV6 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) /* EV6 */
  {
  }
  
  /* Send the configuration register data pointer */
  I2C_SendData(I2C1, LM75_CONF_Reg);
  
  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
  {
  }

  /* Enable or disable SD bit */
  if (NewState != DISABLE)
  {
    /* Disable LM75 */
    I2C_SendData(I2C1, RegValue | LM75_SD_Set);
  }
  else
  {
    /* Enable LM75 */
    I2C_SendData(I2C1, RegValue & LM75_SD_Reset);
  }

  /* Test on I2C1 EV8 and clear it */
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
  {
  }

  /* Send I2C1 STOP Condition */
  I2C_GenerateSTOP(I2C1, ENABLE);     
}

/*******************************************************************************
* Function Name  : Thermometer_Temperature
* Description    : Displays the temperature in Celsius and fahrenheit degree.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void Thermometer_Temperature(void)
{
  u32 i = 0, pressedkey = 0;
  
  while(ReadKey() != NOKEY)
  {
  }
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, DISABLE);
  
  /* Initialize the Temperature Sensor */
  I2C_LM75_Init();

  if(I2C_LM75_Status() == SUCCESS)
  {
    /* Disable the JoyStick Interrupts */
    IntExtOnOffConfig(DISABLE);

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
    /* Clear the LCD */
    LCD_Clear(White);
  
    /* Set the Icon display window */ 
    LCD_SetDisplayWindow(150, 190, 64, 64);
 
    /* Display the Thermometer icon */
#if STM3210E
    LCD_NORDisplay(TSENSOR);
#else
    LCD_SPIDisplay(TSENSOR);
#endif

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
    /* Disable LCD Window mode */
    LCD_WindowModeDisable();

    /* Set the Back Color */
    LCD_SetBackColor(Red);
    /* Set the Text Color */
    LCD_SetTextColor(White);

    LCD_DisplayStringLine(Line2, "     Temperature    ");

    /* Set the Back Color */
    LCD_SetBackColor(Blue);
    /* Set the Text Color */
    LCD_SetTextColor(Green);

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, DISABLE);

    /* Wait until no key is pressed */
    while(ReadKey() != NOKEY)
    {
    }
    
    /* Wait until a key is beiing pressed */
    while(pressedkey == NOKEY)
    {
      /* Initialize the Temperature Sensor */
      I2C_LM75_Init();

      /* Get double of Temperature value */
      TempCelsius_Value = I2C_LM75_Temp_Read();

	  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

      if(TempCelsius_Value <= 1023)
      {
        /* Positive temperature measured */
        TempCelsius_Display[5] = '+';
        TempFahrenheit_Display[5] = '+'; 
      }
      else
      {
        /* Negative temperature measured */
        TempCelsius_Display[5] = '-'; 
        TempFahrenheit_Display[5] = '-'; 
        /* Remove temperature value sign */
        TempCelsius_Value = 0x800 - TempCelsius_Value;
      }

      /* Calculate temperature digits in 癈 */
      Temp_Decimal = ((TempCelsius_Value & 7) * 1000 / 8);
      TempCelsius_Display[10] = (Temp_Decimal / 100) + 0x30;
      TempCelsius_Display[11] = ((Temp_Decimal % 100) / 10) + 0x30;
      TempCelsius_Display[12] = ((Temp_Decimal % 100) % 10) + 0x30;
      TempCelsius_Value >>= 3;
      TempCelsius_Display[6] = (TempCelsius_Value / 100) + 0x30;
      TempCelsius_Display[7] = ((TempCelsius_Value % 100) / 10) + 0x30;
      TempCelsius_Display[8] = ((TempCelsius_Value % 100) % 10) + 0x30;

      /* Convert temperature 癈 to Fahrenheit */
      Temp_Value_Fahrenheit = ((9 * ((TempCelsius_Value * 1000) + Temp_Decimal)) / 5) + 32000;

      /* Calculate temperature digits in 癋 */
      TempFahrenheit_Display[6] = (Temp_Value_Fahrenheit / 100000) + 0x30;
      TempFahrenheit_Display[7] = ((Temp_Value_Fahrenheit % 100000) /10000) + 0x30;
      TempFahrenheit_Display[8] = ((Temp_Value_Fahrenheit % 100000) %10000/1000) + 0x30;
      TempFahrenheit_Display[10] = ((((Temp_Value_Fahrenheit % 100000) %10000) %1000) /100) + 0x30;
      TempFahrenheit_Display[11] = (((((Temp_Value_Fahrenheit % 100000) %10000) %1000) %100) /10) + 0x30;
      TempFahrenheit_Display[12] = (((((Temp_Value_Fahrenheit % 100000) %10000) %1000) %100) %10) + 0x30;

      /* Display Fahrenheit value on LCD */
      for(i = 0; i < 20; i++)
      {
        LCD_DisplayChar(Line7, (319 - (16 * i)), TempCelsius_Display[i]);
        LCD_DisplayChar(Line8, (319 - (16 * i)), TempFahrenheit_Display[i]);
      }
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, DISABLE);
      pressedkey = ReadKey(); 
    }
  }
  else
  {
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
    LCD_Clear(White);
    LCD_DisplayStringLine(Line2, " No TSENSOR Present ");
    LCD_DisplayStringLine(Line3, "Exit:  Push JoyStick");
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, DISABLE);
    while(ReadKey() == NOKEY)
    {
    }
  }
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
  LCD_Clear(White);
  /* Display menu */
  DisplayMenu();
  /* Enable the JoyStick interrupt */
  IntExtOnOffConfig(ENABLE);   
}

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/