STM32F0xx Standard Peripherals Firmware Library: ADC ADC1_AnalogWatchdog Description

  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    ADC/ADC_AnalogWatchdog/readme.txt 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   Description of the ADC Analog Watchdog 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
  *
  * 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.
  *
  ******************************************************************************
   

Example Description

This example describes how to use the ADC analog watchdog to guard continuously an ADC channel. The ADC1 is configured to convert continuously ADC channel11 and ADC channel10 respectively for the STM32F051R8T6 and STM32F072VBT6 devices. The analog watchdog is configured and enabled to guard a single regular channel. Each time the channel11 or channel10 converted value exceeds programmed analog watchdog high threshold (value 3102) or goes down analog watchdog low threshold (value 1861) an AWD interrupt is generated and the output pin connected to LED4 is toggled. The LED will bright as long as the AWD interrupt is generated which means that the converted value of regular ADC channel11 or channel10 is outside the range limited by high and low analog watchdog thresholds.

Note:

ADC channel11 for STM32F051R8T6 device and channel10 for STM32F072VBT6 are connected to a potentiometer (RV3) which can deliver a voltage between 0V and 3.3V.

Directory contents

• ADC/ADC_AnalogWatchdog/stm32f0xx_conf.h Library Configuration file
• ADC/ADC_AnalogWatchdog/stm32f0xx_it.c Interrupt handlers
• ADC/ADC_AnalogWatchdog/stm32f0xx_it.h Interrupt handlers header file
• ADC/ADC_AnalogWatchdog/main.c Main program
• ADC/ADC_AnalogWatchdog/main.h Main program header file
• ADC/ADC_AnalogWatchdog/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
  • Use potentiometer RV3

• STM32072B-EVAL Set-up
  • Use potentiometer RV3

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.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.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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