3.6.3.2.4 Proximity light sensor example Application on PIC32CM LS00 Curiosity Nano + Touch Evaluation Kit

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Description

This application demonstrates how to interface VCNL4200 with Curiosity Nano Explorer board and PIC32CM LS00 Curiosity Nano + Touch Evaluation kit. VCNL4200 integrates a high sensitivity proximity sensor, ambient light sensor and 940 nm IRED into one small package and it is present in Curiosity Nano Explorer Board. Proximity sensor detects nearby objects whereas ambient light sensor detects light intensity. Based on the light source and object's distance from the sensor, the value generated by ambient light sensor and proximity sensor varies.

Modules/Technology Used

  • Peripheral Modules
    • PM
    • SYSTICK
    • SERCOM2
    • SERCOM3
    • EVSYS
    • STDIO

The MCC Harmony project graph would look like this:

Hardware Used

Software/Tools Used

Refer Project Manifest present in harmony-manifest-success.yml under the project folder pic32cm_ls00_cnano_proximity/firmware/src/config/pic32cm_ls00_cnano

  • Refer the Release Notes to know the MPLAB X IDE and MCC Plugin version.

Because Microchip regularly update tools, occasionally issue(s) could be discovered while using the newer versions of the tools. If the project doesn’t seem to work and version incompatibility is suspected, It is recommended to double-check and use the same versions that the project was tested with. To download original version of MPLAB Harmony v3 packages, refer to document How to Use the MPLAB Harmony v3 Project Manifest Feature

Setup

  • Connect the PIC32CM LS00 Curiosity Nano + Touch Evaluation Kit to the host PC using a Type-A male to micro-B USB cable. Plug the cable into the Micro-B USB (Debug USB) port on the evaluation kit.
Important: Remove the shorted jumper on the Microphone OUT for I2C communication as shown in the above figure.

Programming hex file

The pre-built hex file can be programmed by following the below steps.

Steps to program the hex file
  • Open MPLAB X IDE
  • Close all existing projects in IDE, if any project is opened.
  • Go to File -> Import -> Hex/ELF File
  • In the Import Image File window,
    1. Create Prebuilt Project,
      • Click the Browse button to select the prebuilt hex file.
      • Select Device as PIC32CM5164LS00048.
      • Ensure the proper tool is selected under Hardware Tool and click on Next button.
    2. Select Project Name and Folder,
      • Select appropriate project name and folder and click on Finish button
  • In MPLAB X IDE, click on Make and Program Device button to program the device.
  • Follow the steps in Running the Demo section below.

Programming/Debugging Application Project

  • Open the project (pic32cm_ls00_cnano_proximity/firmware/proximity_pic32cm_ls00_cnanogroup) in MPLAB X IDE.
  • Right click on "proximity_pic32cm_ls00_cnanogroup" file and go to Open Required projects > Open All Projects.
  • Then right click on the non-secure project and click Set as Main Project.
  • Ensure "PIC32CM LS00 Curiosity Nano" is selected as hardware tool to program/debug the application
  • Build the code and program the device by clicking on the "make and program" button in MPLAB X IDE tool bar
  • Follow the steps in Running the Demo section below.

Running the Demo

  • Open the Tera Term/PuTTY terminal application on your PC (from the Windows® Start menu by pressing the Start button)
  • Set the baud rate to 115200
  • To Reset the device, run this command: ipecmd.exe -P32CM5164LS00048 -TPNEDBG -OK from the following location: C:/Program Files/Microchip/MPLABX/v6.20/mplab_platform/mplab_ipe
Attention: The PIC32CM LS00 Curiosity Nano + Touch Evaluation Kit does not include a reset button. Therefore, the device can be reset by executing the reset command in the CMD prompt.
  • The console prints the value of proximity sensor and ambient light sensor as shown in the figure below
  • The value of proximity sensor increases as an object moves closer to the sensor and decreases as the object moves further away from the sensor.
  • The value of ambient light sensor increases when light source is close to the sensor and decreases as the light source moves further away from the sensor.

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