📄 tsensor.c
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/* 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 */
{
}
/* Test on EV7 and clear it */
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED)) /* EV7 */
{
}
/* Store I2C1 received data */
RegValue = I2C_ReceiveData(I2C1) << 8;
/* 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 Temperature value */
return (RegValue >> 5);
}
/*******************************************************************************
* 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)
{
if(I2C_LM75_Status() == SUCCESS)
{
TempCelsius_Value = I2C_LM75_Temp_Read();
}
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 */
printf("\r\nTemperature is %s",TempCelsius_Display) ;
printf("\r\nTemperature is %s",TempFahrenheit_Display);
}
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
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