1.58 TrustZone Non-Secure TC Demonstration - PIC32CMLS60

This example application performs a PWM signal applied on PC19 pin (LED0) based on TC0 peripheral.

Description

This demonstrates TrustZone feature and uses two projects viz., Secure and Non-Secure Project that work together on the same MCU and offering security isolation between the Trusted and the Non-trusted resources in the device.

  • Non-Secure project configures the TC0 peripheral to generate interrupts based on Match0 and Overflow IRQs.
  • Non-Secure project configures the SysTick to generates interrupts
  • Non-secure project then performs PWM signal (based on TC0 duty cycle management and delays from SysTICK) to apply to LED0 pin

Components used

  • TC0 - Configured as Non-secure peripheral
  • LED0 - Configured as Non-secure pin
  • SysTick - Configured as Non-secure peripheral

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 as shown below:
TypePath
Project Groupapps/trustZone/tc/nonsecure_tc_ls60
Secure Projectapps/trustZone/tc/nonsecure_tc_ls60/Secure/firmware
Non-Secure Projectapps/trustZone/tc/nonsecure_tc_ls60/NonSecure/firmware

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

Project NameDescription
pic32cm_ls60_cpro_Secure.X

pic32cm_ls60_cpro_NonSecure.X

Secure and Non-secure MPLABX project for PIC32CM LS60 Curiosity Pro Evaluation Kit

Setting Up the Hardware

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

Project NameBoard
pic32cm_ls60_cpro_Secure.X

pic32cm_ls60_cpro_NonSecure.X

PIC32CM LS60 Curiosity Pro Evaluation Kit

Setting Up PIC32CM LS60 Curiosity Pro Evaluation Kit

  • Connect the Debug USB port on the board to the computer using a micro USB cable

Running the Application

  1. Open the project group in the MPLAB X IDE and set the non-secure project as main project
  2. Build and program the application
  3. Observe the output for PIC32CM LS60 Curiosity Pro Evaluation Kit as follows:
    • LED0(Green) luminosity is decreasing from maximum to minimum based on PWM signal applied by TC0 peripheral in Non-secure project