STM32F0xx Standard Peripherals Firmware Library: ADC LowPower Example Description

  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    ADC/ADC_LowPower/readme.txt 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   brief   Description of the ADC Low Power mode 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 provides a short description of how to use the ADC peripheral with Auto-delayed conversion mode and Auto-poweroff modes.

The ADC is triggered by TIM3_TRGO which is connected to TIM3_Update Event. Each time the ADC is triggered, it converts the RV3 voltage (which corresponds to ADC channel11 and ADC channel10 respectively in STM32F051R8T6 and STM32F072VBT6 devices), and then the ADC enters in delay mode (no Overrun detect) until the ADC data register has been read by pressing KEY button or TAMPER button respectively for STM32F051R8T6 and STM32F072VBT6 devices.

The Auto delay mode and the Auto power off mode activation can be done by uncommenting the "#define ADC_LOWPOWER " in the main.c file. If "#define ADC_LOWPOWER" is commented, an overrun interrupt is generated and LED1 is toggled. Otherwise, LED1 remains OFF.

Directory contents

• ADC/ADC_LowPower/stm32f0xx_conf.h Library Configuration file
• ADC/ADC_LowPower/stm32f0xx_it.c Interrupt handlers
• ADC/ADC_LowPower/stm32f0xx_it.h Interrupt handlers header file
• ADC/ADC_LowPower/main.c Main program
• ADC/ADC_LowPower/main.h Main program header file
• ADC/ADC_LowPower/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
  • Use key button

• STM32072B-EVAL Set-up
  • Use potentiometer RV3
  • Use tamper button

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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