1.14 RSTC Interrupt

This example shows how to use the RSTC peripheral to generate an interrupt instead of generating a reset, when the Reset switch is pressed on board.

Description

The RSTC peripheral samples the Reset input (NRST pin) at slow clock speed. When the line is detected low, it resets the processor and the peripherals. However, the RSTC peripheral can be programmed to not trigger a reset when an assertion of NRST occurs. The Reset pin state can be read at any time in software or it can also be programmed to generate an interrupt instead of generating a reset.

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/rstc/led_switcher/firmware.

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

Project NameDescription
pic32cx_mtsh_db.XMPLABX project for PIC32CXMTSH Development Board

Setting Up the Hardware

The following table shows the target hardware for the application projects.

Project NameBoard
pic32cx_mtsh_db.XPIC32CXMTSH Development Board

Setting Up PIC32CXMTSH Development Board

  • Power on the board using a 12V power supply on J3
  • Attach a debugger to the SWD/JTAG port J17

Running the Application

  1. Build and Program the application project using its IDE
  2. Disconnect and reconnect the Debug USB port to power cycle the board
  3. Press the “RESET” switch and observe the LED toggling
    The following table provides the LED name:
    BoardLED Name
    PIC32CXMTSH Development BoardD20