123 lines
6.3 KiB
Plaintext
123 lines
6.3 KiB
Plaintext
/**
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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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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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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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| | | | | |
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| | SCL(PB6)|______________________|CLOCK | |
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| | | | | |
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| | | | | |
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| | | | | |
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| | SDA(PB7)|______________________|DATA | |
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| | | | | |
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| |SMB alert(PB5)|______________________|EVENT | |
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| |______________| |______________| |
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| __ |
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| |__| |
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| Tamper push-button |
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| |
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|__________________________________________________________________________|
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STM32072B-EVAL RevB
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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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STM32072B-EVAL RevB'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 STM32072B-EVAL RevB 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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*/
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