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# 3.1.1 Getting Started Application on PIC32MK MCM Curiosity Pro Development Board

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## Description

The application reads the current room temperature from the temperature sensor on the MikroElectronika Weather click board. The temperature reading is displayed on a serial console periodically every 500 milliseconds. The periodicity of the temperature values displayed on the serial console is changed to one second, two seconds, four seconds, and back to 500 milliseconds every time the user presses the switch SW1 on the PIC32MK MCM Curiosity Pro Development Board. An LED (LED1) is toggled every time the temperature is displayed on the serial console.

## Modules/Technology Used

- Peripheral Modules
  - SPI
  - TMR
  - Core Timer
  - GPIO
  - UART
  - DMAC
  - EVIC
  The following figure shows the MCC Harmony project graph with all the components.

## Hardware Used

- PIC32MK MCM Curiosity Pro Development Board
- MikroElectronika Weather click board

## Software/Tools Used

This project has been verified to work with the following versions of software tools:

Refer Project Manifest present in harmony-manifest-success.yml under the project folder firmware/src/config/pic32mk_mcm_cpro

- Refer the Release Notes to know the MPLAB X IDE and MCC Plugin version.
- Any Serial Terminal application, such as Tera Term terminal application.

Because Microchip regularly update tools, occasionally issue(s) could be discovered while using the newer versions of the tools. If the project does not 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 (DS90003305)

## Setup

- Connect the Type-A male to Micro-B USB cable to the Micro-B Serial USB port (J400) on the PIC32MK MCM Curiosity Pro Development Board for logs
- Connect the Type-A male to Micro-B USB cable to Micro-B DEBUG USB port (J500) to power and debug the MCM Curiosity Pro Development Board
- Connect the MikroElectronika Weather click board on the mikroBUS interface J300. Ensure the
  following hardware modification before connecting the Weather click board

## Hardware Modification

- The MikroElectronika Weather click board supports both I²C and SPI protocols to communicate with the BME280 temperature sensor. It provides jumpers (resistors) to choose a communication interface between I²C and SPI. By default, I²C is selected as the communication interface. The PIC32MK1024MCM100 device does not have an I²C peripheral module; therefore, SPI is chosen as the communication interface to communicate with the temperature sensor.
  The hardware modification to be done on the MikroElectronika Weather click board is shown in the figure below

## 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, Step 1 - Create Prebuilt Project, click the "Browse" button to select the prebuilt hex file.
- Select Device has "PIC32MK1024MCM100"
- Ensure the proper tool is selected under "Hardware Tool"
- Click on "Next" button
- In the "Import Image File" window, Step 2 - Select Project Name and Folder, select appropriate project name and folder
- Click on "Finish" button
- In MPLAB X IDE, click on "Make and Program Device" Button. The device gets programmed in sometime.
- Follow the steps in "Running the Demo" section below

## Programming/Debugging Application Project

- Open the project (pic32mk_mcm_cpro_getting_started\firmware\pic32mk_mcm_cpro.X) in MPLAB X IDE
- Ensure "Starter Kits (PKOB)" is selected as hardware tool to program/debug the application
- Build the code and program the device by clicking on the "Make and Program Device" button in MPLAB X IDE tool bar
- Follow the steps in "Running the Demo" section below

## Running the Demo

- Open the Tera Term terminal application on the PC (from the Windows® Start menu by pressing the Start button)
- Change the baud rate to 115200
- The user should see the temperature values (in °F) being displayed on the terminal every 500 milliseconds, as shown below
- Notice LED1 blinking at a 500 millisecond rate
- The user may vary the temperature by placing the finger on the temperature sensor (for a few seconds)
- Press the SW1 switch on the PIC32MK MCM Curiosity Pro Development Board to change the default sampling rate to one second
- Every subsequent press of switch SW1 on the PIC32MK MCM Curiosity Pro Development Board changes the default sampling rate to two seconds, four seconds, 500 milliseconds and back to one second in cyclic order as shown below
- While the temperature sampling rate changes on every switch S1 press, notice LED1 toggling at the same sampling rate

## Comments

- Reference Training Module: Getting Started with Harmony v3 Peripheral Libraries on PIC32MK GP MCUs
- This application demo builds and works out of box by following the instructions above in "Running the Demo" section. If the user needs to enhance/customize this application demo, the user needs to use the MPLAB Harmony v3 Software framework. Refer links below to setup and build the applications using MPLAB Harmony.
  - How to Setup MPLAB Harmony v3 Software Development Framework (DS90003232)
  - How to Build an Application by Adding a New PLIB, Driver, or Middleware to an Existing MPLAB Harmony v3 Project (DS90003253)
  - Video - How to Set up the Tools Required to Get Started with MPLAB® Harmony v3 and MCC
  - Create a new MPLAB Harmony v3 project using MCC
  - Update and Configure an Existing MHC-based MPLAB Harmony v3 Project to MCC-based Project