Communication between I2C and STLM75 Temperature sensor

  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    I2C/I2C_TSENSOR/readme.txt 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   Description of the I2C TSENSOR example.
  ******************************************************************************
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
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  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
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  ******************************************************************************
   

Example Description

This example provides a description of how to use the I2C to communicate with an STLM75 (or a compatible device) I2C temperature sensor is mounted on the STM320518-EVAL board and used to get instantaneous external temperature (-55�C to +125�C).

Thanks to STM32 I2C SMBus feature, we can easily monitor the temperature variations. This is managed by the SMBus Alert which is generating a dedicated interrupt informing the system that the temperature is out of the selected ranges.

The user can configure the TOS and THYS thanks to a dedicated define values in the code.

By default the EVAL demo are setting them to (see main.c file):

#define TEMPERATURE_THYS 31 #define TEMPERATURE_TOS 32

Directory contents

• I2C/I2C_TSENSOR/stm32f0xx_conf.h Library Configuration file
• I2C/I2C_TSENSOR/stm32f0xx_it.c Interrupt handlers
• I2C/I2C_TSENSOR/stm32f0xx_it.h Interrupt handlers header file
• I2C/I2C_TSENSOR/main.c Main program
• I2C/I2C_TSENSOR/main.h Main program header file
• I2C/I2C_TSENSOR/system_stm32f0xx.c STM32F0xx system source file

Note:

The "system_stm32f0xx.c" is generated by an automatic clock configuration tool and can be easily customized to meet user application requirements. To select different clock setup, use the "STM32F0xx_Clock_Configuration_VX.Y.Z.xls" provided with the AN4055 package available on ST Microcontrollers

Hardware and Software environment

• This example runs on STM32F0xx devices.

• This example has been tested with STMicroelectronics STM320518-EVAL and STM32072B-EVAL including respectively STM32F051R8T6 and STM32F072VBT6 devices and can be easily tailored to any other supported device and development board

• STM320518-EVAL Set-up
  • STLM75 I2C temperature sensor is already available on this board.

• STM32072B-EVAL Set-up
  • STLM75 I2C temperature sensor is already available on this board.

How to use it ?

In order to make the program work, you must do the following :

• Copy all source files from this example folder to the template folder under Project
• Open your preferred toolchain
• If the used device is STM32F051R8T6 choose STM32F051 project
  • Add the following files to the project source list
    • Utilities/STM32_EVAL/STM320518_EVAL/stm320518_eval_i2c_tsensor.c
    • Utilities/STM32_EVAL/STM320518_EVAL/stm320518_eval.c
    • Utilities/STM32_EVAL/STM320518_EVAL/stm320518_eval_lcd.c

• If the used device is STM32F072VBT6 choose STM32F072 project
  • Add the following files to the project source list
    • Utilities/STM32_EVAL/STM32072B_EVAL/stm32072b_eval_i2c_tsensor.c
    • Utilities/STM32_EVAL/STM32072B_EVAL/stm32072b_eval.c
    • Utilities/STM32_EVAL/STM32072B_EVAL/stm32072b_eval_lcd.c
• Rebuild all files and load your image into target memory
• Run the example

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