Comparator With LDR example.

  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    COMP/COMP_LDR/readme.txt 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   Description of Comparator With LDR 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

The STM32F0xx microcontroller has an embedded comparator which can be used in combination with DAC peripheral for more application like the measure of light intensity (using the LDR sensor).

In this example when the luminosity changes the progress bar displayed on the color LCD changes according to light intensity level detected on comparator.

Directory contents

• COMP/COMP_LDR/stm32f0xx_conf.h Library Configuration file
• COMP/COMP_LDR/stm32f0xx_it.c Interrupt handlers
• COMP/COMP_LDR/stm32f0xx_it.h Interrupt handlers header file
• COMP/COMP_LDR/main.c Main program
• COMP/COMP_LDR/main.h Main program header file
• COMP/COMP_LDR/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
  • Make sure that jumper JP13 is not fitted to avoid noise from the speaker.

• STM32072B-EVAL Set-up
  • Make sure that jumper JP18 is not fitted to avoid noise from the speaker.

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

© COPYRIGHT STMicroelectronics