1.10 Clock Configuration

This example application shows how to configure the clock system to run the device at maximum frequency. It also outputs a prescaled clock signal on a GPIO pin for measurement and verification.

Description

Clock system generates and distributes the clock for the processor and peripherals. This example application shows how to use the clock manager to configure the device to run at the max possible speed. A prescaled clock signal is routed to GPIO pin to measure the frequency and accuracy of the internal device clock.

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/clock/clock_config/firmware.

To build the application, refer to the following table and open the project using its IDE.

Project NameDescription
pic32mk_gp_db.XMPLABX project for PIC32MK GP Development Kit
pic32mk_mcj_curiosity_pro.XMPLABX project for PIC32MK MCJ Curiosity Pro Board
pic32mk_mcm_curiosity_pro.XMPLABX project for PIC32MK MCM Curiosity Pro Board
pic32mk_mca_curiosity_pro.XMPLABX project for PIC32MK MCA Curiosity Pro Board

Setting Up PIC32MK GP Development Kit

  • Connect an oscilloscope to monitor the PORT pin RPA0 (Pin number #4 on the J29 connector)
  • Connect the Debug USB port (J12) on the board to the computer using a micro USB cable

Setting Up PIC32MK MCJ Curiosity Pro Board

  • Connect an oscilloscope to monitor the PORT pin RPB11 (Pin #8 on J503/EXT3 connector)
  • Connect the Debug USB port on the board to the computer using a micro USB cable

Setting Up PIC32MK MCM Curiosity Pro Board

  • Connect an oscilloscope to monitor the PORT pin RPC1 (Pin number #1 on J301 connector)
  • Connect the Debug USB port (J500) on the board to the computer using a micro USB cable

Setting Up PIC32MK MCA Curiosity Pro Board

  • Connect an oscilloscope to monitor the pin RPC6 (Pin 28 on J601 connector)
  • Connect the Debug USB port on the board to the computer using a micro USB cable

Running the Application

  1. Build and Program the application using its IDE
  2. Observe a clock of 4 MHz on the clock output pin
  3. LED should be blinking continuously
    Refer to the following table for clock output pin and LED name for different boards:
    BoardClock Output PinLED Name
    PIC32MK GP Development KitRPA0 (Pin number #4 on the J29 connector)LED0
    PIC32MK MCJ Curiosity Pro Board(Pin #8 on J503/EXT3 connector)LED2
    PIC32MK MCM Curiosity Pro Board(Pin number #1 on J301 connector)LED1
    PIC32MK MCA Curiosity Pro Board(Pin 28 on J601 connector)LED1