137 lines
7.6 KiB
Plaintext
137 lines
7.6 KiB
Plaintext
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/**
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@page SMBUS_TSENSOR SMBUS Temperature Sensor example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file SMBUS/SMBUS_TSENSOR/readme.txt
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* @author MCD Application Team
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* @brief Description of the SMBUS Temperature Sensor example.
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******************************************************************************
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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MBUS data buffer transmission/reception using an interrupt. The STM32 microcontroller communicates with an SMBUS temperature sensor.
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__________________________________________________________________________
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| ______________ ______________ |
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| | I2C1 | | TSENSOR | |
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| | SCL(PB6)|______________________|CLOCK | |
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| | SDA(PB7)|______________________|DATA | |
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| |SMB alert(PB5)|______________________|EVENT | |
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| |______________| |______________| |
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| __ |
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| Tamper push-button |
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|__________________________________________________________________________|
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STM32091C-EVAL
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At the beginning of the main program the HAL_Init() function is called to reset
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all the peripherals, initialize the Flash interface and the systick.
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Then the SystemClock_Config() function is used to configure the system
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clock (SYSCLK) to run at 48 MHz.
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The temperature sensor configuration is ensured by TSENSOR_Init() which verify that
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temperature sensor is ready to communicate by calling TSENSOR_IsReady(), then
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set the configuration using HAL_SMBUS_Master_Transmit_IT() and HAL_SMBUS_EnableAlert_IT()
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The SMBUS peripheral configuration is ensured by the HAL_SMBUS_Init()
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and HAL_SMBUS_IsDeviceReady() called respectively in TSENSOR_Init() function.
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This later is calling the HAL_SMBUS_MspInit()function which core is implementing
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the configuration of the needed SMBUS resources according to the used hardware (CLOCK,
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GPIO and NVIC). You may update this function to change SMBUS configuration.
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The SMBUS/Temperature Sensor communication is then initiated.
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Then at each loop in main program a read and a display on LCD of the current temperature
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is done each second.
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An specific warning message is display on LCD in case of an alert from temperature sensor
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is detected.
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This management is perform using the TSENSOR_ReadTemp()and TSENSOR_ReadStatus() functions
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allow respectively the read of the current temperature and get the temperature sensor status.
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STM32091C-EVAL's Messages and LEDs can be used to monitor the temperature sensor status:
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- LED3 is ON when there is an error during communication with the temperature sensor.
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- Please refer to the Figure 5. "OS output temperature response diagram" in the following document :
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http://www.st.com/web/en/resource/technical/document/datasheet/CD00153511.pdf
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- In case of the Temperature high limit interrupt is raised, this warning message is displayed on the LCD :
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Temperature Limit High
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has been exceeded
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- In case of the low Temperature interrupt is raised, a warning message is displayed on the LCD :
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Temperature is at or
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below the Low Limit
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@note TSENSOR_SMBUS instance used and associated resources can be updated in "stm32f0xx_tsensor.c"
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and "main.h" files depending hardware configuration used.
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application need to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Directory contents
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- SMBUS/SMBUS_TSENSOR/Inc/stm32f0xx_hal_conf.h HAL configuration file
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- SMBUS/SMBUS_TSENSOR/Inc/stm32f0xx_it.h Interrupt handlers header file
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- SMBUS/SMBUS_TSENSOR/Inc/main.h Header for main.c module
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- SMBUS/SMBUS_TSENSOR/Inc/stm32f0xx_tsensor.h Temperature Sensor driver header file
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- SMBUS/SMBUS_TSENSOR/Src/stm32f0xx_it.c Interrupt handlers
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- SMBUS/SMBUS_TSENSOR/Src/main.c Main program
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- SMBUS/SMBUS_TSENSOR/Src/system_stm32f0xx.c STM32F0xx system source file
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- SMBUS/SMBUS_TSENSOR/Src/stm32f0xx_hal_msp.c HAL MSP file
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- SMBUS/SMBUS_TSENSOR/Src/stm32f0xx_tsensor.c Temperature Sensor driver file
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@par Hardware and Software environment
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- This example runs on STM32F0xx devices.
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- This example has been tested with STM32091C-EVAL board and can be
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easily tailored to any other supported device and development board.
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
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*/
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